We are so enthusiastic about the whole concept of STOK Electric, the way of thinking, the spirit of these two young entrepreneurs, the balls of the owner of SY Elysium and the numbers they showed, one remark has to be made, the hydro generation of 5kW is theoretically possible and they will show us the numbers as well when they do the sea trial. If this is the case they don't need solar power for extra charging which will be beneficial for the aesthetics of the classic lines. If you are interested please have a look at www.stokelectric.com and @sy_elysium on Instagram. The owners of SY Elysium want to work and live aboard while sailing the world. Feel the Breeze and #beincharge with SuperB Lithium Iron Phosphate Batteries www.super-b.com
@@PetervanderPalm The e motor isnt the problem, the cost of batteries and solar capacity on a monohull is. BYD blade cells could be even better and theres new cells and chemistries coming along. However the Diesel electric route and regen under sail is a very good next best for cruising and live aboard's now. Especially now fossil fuels are on the extinction list. 8-10yrs. See sailing uma and the polish sailing familly Sailing oceans rebuilding their Trimaran Poly and going down this very route probably. 😎😁 Plus with multi motors and a big area for Solar they get the ability to tank turn in tight spots... They can pour in a lot more free Solar and they already have a virtually new Yanmar that size .
@@clivestainlesssteelwomble7665 Even Sailing Uma has a generator, for those times there is little sun and sailing.... but it is a backup and it can be relatively small.
Great to hear Nanno, these guys are really one of kind, so full of passion, they know exactly what they are talking about and already working together with these brands, looking forward to their journey and can't wait to see the sailing yacht under sail.
I was always a fan of this channel! Love these guys and admire the authenticity of how you share your life with us! STOK Electric, you guys are fabulous! Admire your work and all the research and dedication you have put into this beautiful project!! Awesome guys!! Hope to someday meet you all personally!
It is a wonderful thing to see two young men that have figured out how th propel a boat with reusable energy. And that the entire energy system is isolated from the hull. These guys will be copied by many others in the future. And they will probably be very wealthy. Thank you for introducing them to the boating public.
What an incredible project these young brothers are developing. The electric system, or at least hybrid, is the future without a doubt. Kisses & hugs from this old Brazilian sea wolf.
I love it. Being modular, It’s reallyIt really customisable, it simplifies the amount of systems that need to be maintained, and adds the benefit of having a serious electrical system to use day to day…. No doubt that this is 100% the future
Great to hear you love it Robbie, we had a blast and learned so much from them, the fact it's a very simple well thought setup makes it very attractive.
amazing, simple technological breakthrough but provides extraordinary benefits, besides maintaining the aesthetics of the boat but also not taking up space on the boat, thank you young people.
Wow this is by far the best interview i have seen in a long time. These guys are Brilliant and make explain all of it in detail. I am going to look at this company for when i buy my yacht. cheers guys all the best xx
This was indeed a very nice topic for your vlog! The electric propulsion was already on my wish list but I'll add STOK Electric to my favourites, although my ship doesn't seem to be long enough for their system (31 feet). Unfortunately this electric conversion still looks a bit beyond my budget for now but this episode sparked my enthusiasm!
Thank You for taking on this project to show everyone sustainable alternatives . This planet is begging for help. Hats off to STOK Electric for such a well thought out system. Well done you two! - Breezer
These two young men are on their way to becoming millionaires! Clearly many hours of sea trails are ahead of the production of their creation, but wow! This is very exciting stuff! Many things have been powered by electric motors for decades but not to this level of efficiency. Very interesting for sure. Thanks for sharing.
What a fantastic video and tutorial! Thanks all for this, wishing these folks well as they build themselves up. Great work all around, thanks for sharing!
Great video, very well explained and I love the enthusiastic attitude of the 2 young entrepreneurs. Way to go. Question, what is the fuel consumption of the Yanmar per hour in order to keep on using the engines for a prolonged time. Let's say cloudy, misty days with no wind for days on end?
The engine is able to run at its most efficient point. We haven't done fuel consumption measurements as of yet, but these will probably be very good. Yanmar states 8L/h absolute worst case in their datasheet. But in reality this will be much less
Hybrid drive is the future for cars and boats. For powerboats most systems stay with diesel propulsion and run large generators off the engines, this means no genset required, plus the generators can turn the props on their own at slower speeds. For sailboats electric motors seem to be the propulsion of choice, Stok looks to have a nice system, but $100k is expensive. The good news, by the time you're ready to consider a hybrid system, the price will be 1/2 with better performance, possible even solar sails for more free energy. Something to look forward to in the future.
Thank you for the reply. Yes unfortunately the system is still quite expensive. Most of the cost are in the batteries. In the future, with better technology and availability these prices will drop.
a big part of the costs are the batteries and they will drop in the future to make it more accessible, it's still early stage and these guys are indeed far ahead.
Great video, remembering what it was like from our circumnavigation in the 1980s, presently cruising the Bahamas in our electric sailboat. My wife's book is a good read, published by Austin Macauley of New York, literally a fictional story of sailing and adventure: "Seychelle and the Cannabis Yachties". It is very entertaining, hoping you will give it a read.
One thing I would like to here more about is how all those batteries impact other electronics on the ship. For example, can you go full induction on the range and electric for the oven, ditching propane for everything except maybe an outdoor grill? What about being able to regularly use an immersion circulator like a Breville Joule sous vide that draws 1100watts? What about the impact on the anchor windlass?
Hi Andrew, they go full induction and they use the windlass a lot in their calculations since the owner is a future live aboard as well. If you want to know all the details please send the STOK brothers an email, they are happy to answer all your questions.
Thanks for sharing that information, this is almost the ideal solution. Maybe the full ideal solution would be to get rid of the generator with solar power (it would perfect for catamarans for which the aesthetic downside is not that relevant). Hydrogenerator + solar power and you can cross the Atlantic! This is my dream.
Bravo for the youth who have dreams. Real young entrepreneurs who apply their knowledge. Its should give you the taste to make an investment for an update of your electrical system of your boat. The idea of using the engine of this boat so as not to have difficulty finding parts for the repair is great. This is a very nice vacation for you. To take the time to increase your personal knowledge without being present because of a weather window. I waited for the charging time for the batteries. But do you know if you have to use the electric motor for your trips, what will be the autonomy of the batteries before restarting the generator motor for recharging. Thank you for this video
Thank you for your comment. Charging happens through the conventional 12V or 24V battery bank which is present on every sailing boat. This way it is very easy to connect solar panels, hydro pods or shore power to the system, because you can use conventional components. This keeps everything simple. Of course the big battery bank is charged through the generator and hydrogeneration as well. A big benefit of the connection between the 12/24V battery bank and the 350V battery bank is that the energy can flow both ways. So there is a lot of power available on the 12/24V side for household appliances.
That’s incredible. My fear is cost. Cost to repair and or replace. The environmental impact on old batteries is still unknown but may be worse for us all in the long run. Fear of fires (I know. Sounds strange that I’m not worried about a fire with my diesel. Lol). Electric cars in the US is stupid expensive to repair and or replace anything. I love that they are on the cutting edge tho. How inspirational. Thanks fam! Much love to you three! Oh and Big Ben!! Wow he is growing up so fast.
Cost often are an issue with these systems. And that's mostly due to the batteries, fortunately these will become cheaper in the future. Your fear of fires is completely understandable as there are many horror stories of batteries catching fire, this is the exact reason we went with LiFePo4 (LFP) batteries and not conventional Li-ion. The risk of fire with these LFP is reduced dramatically. There are even some video's going around of people shooting LFP batteries with guns, not very scientifically proof of course but still worth something. We try to do everything in our power to make the system as safe as possible, this is also the reason we use 350V to reduce the currents and fire risk. The world has to figure out a good way to give batteries a second life, for example in suburban areas as a backup power source. The batteries have a very long life if used correctly, the same goes for other electronics. I'm not saying it's impossible to break something, but I dare say it's a much more reliable option compared to a diesel engine. To minimize the chances of things breaking we keep everything simple and want to give people the option to easily swap out components if something breaks.
@@stokelectric I am impressed by what you all have been able to do. I don’t mean to talk down or bad about your creation so please don’t take it that way. I am excited for what you are doing and what the future holds. I really am. Thanks for the reply.
lithium battery recycling is leaping ahead exponentially now, and the new batteries produced from recycled ones are showing to have slightly better energy density. but this end of life is not until 20 or 30 years, and in the mean time they can have a very productive life as stationary storage cells.
Thanks for sharing this. I would have like to know if they use same propulsion battery banks as the "house bank" or if there is a separate cross connected system?
We use a separate battery bank for the hybrid system. So the standard house hold battery (12v/24v) remains in tact. This means you can use conventional parts for solar panels, shore chargers and what not. We do have a converter between the battery banks which works both ways, essentially coupling the capacity of the two banks. This increases the available household capacity by a lot, allowing for induction cooking for example. It also means the 350V battery bank doesn't require any special charge connection.
@@FeeltheBreeze sorry guys, we forgot to show you that the normal household battery remains in place, we have the converter box we told you about to essentially connect them into "one large" battery.
this was really interesting and exciting to watch, my only question is how long could you expect a system like this to survive before major work needs to be done on it?
Great question. So, the generator needs to have it's maintenance according to the schedule, it's used less so it will wear out less quickly. Also the generator is the only "maintenance intensive" part in the system, all other components are electronics. With age, some electronics might fail but we try to design it in such a way that the component would be easy to swap out, so no major issue there. It would even be possible to take a spare on an ocean crossing for example. The other big component that would eventually start wearing out are the batteries. They have a life of ~6000 cycles if used correctly, on a ship this is incredibly much since it most likely won't make a full cycle every day. So the expected life of the battery pack we estimate at around 20 years at least. Looking 20 years into the future we expect battery technology to have sky rocketed and be much more affordable and much better.
Not 39 kW, but 39 kWh.... but that is a detail. Hydro-generation and solar hopefully make it less needed to use the generator, but as a backup, it is great.
That’s a clever design. Probably a more favorable system compared to ocean volt. The biggest beef with electric is eventually the juice will run out so there has to be a level of conservatism. You can see it on sailing UMA. But to have the engine work as a generator not for propulsion but to charge the bank is smart. You could increase the range 3 or even 4 time further then just a pure electric and frankly this kind of system will answer that question of where is the juice is going to come from and with the diesel only being used only an hour at a time to charge wow I bet you could cross an ocean without throwing a sail up.
You understand it very well. The diesel generator is there as a backup, with the efficiency of the Yanmar engine, which can always run at it's optimum rpm because it's charging the batteries and not propelling the ship, plus the possibility for 750L of diesel on this ship, crossing an ocean would not be a problem.
Wow what an episode,I think I like you're bucket list also check out tally ho. There building a beautiful boat using kabota With electric nice to see you guys smiling As always Denny from Minnesota
Nice video😃 Is approx 100k for this set up incl. the CPP propeller/shaft/thrust/CV-joint-system as well? I think 70k for a conventional dieselengine and transmission was a way to high cost-estimation🙄 Batteries would also need replacement. Hybride/electric boating is the future - maybe not for the best in all kinda set-ups...but cause of legislation. I really believe in hybrids for all the good benefits it brings in total (redundancy, back-up, re-gen, silent marina operation, house-loads, eliminating ekstra genset, hydraulics etc). BUT I'd prefer it to be parallel hybrid - so the diesel operate where best and completely as standalone for safety, then have all the other benefits and back-ups from a parallel hybrid system. Then you could also use a smaller el-motor and in 48V for less hazardous accidents😉 Especially I'd go parallel when shaft-line and engine beds is conventional anyway. A very nice reason for full diesel-electric as in the video is that you could place the genny and system anywhere onboard - cause it doesn't need to be inline....and then I feel it seems extra weird putting a diesel engine back in the middle of the saloon. Having the galley-sink above the 300V system components feels wrong - even as an IP installation....what would Murphy have said?😉 I guess the owner of the yacht has had his own input on how he/she would like this. Everything will break on a boat sometime so it's all about the total design/installation no matter if its electric or conventional. I believe these guys will have a bright future ahead - and market is heading down this lane. Legislation and emission restrictions makes it impossible to install an old unbreakable Gardner in a new build. You cannot get it CE certified. Today complexity is also added to diesel engines for this reason...turbos, intercoolers, electric control of all combustion, high pressure common rail, exhaust treatments++ So going for electric propulsion is not much more complex...and soon to be shelf ware systems. They used electric uboats in WW1 - so its not rocket science☺️ But designing a complete system and integrate it for best possible operation is the challenge yet I think🤓
Keep in mind that the 100k price includes a 30kW generator. When you add this to the cost of replacing a diesel engine, you'll end up near the 70k mark. Of course it depends on other factors which need to be changed with the new diesel engine. The batteries will last a very long time if used properly, it's not like general AGM batteries which need replacing every 6 years. Like you say the redundancy is a big benefit of a hybrid system. I understand that you would prefer a parallel system instead of serial but this has a lot of drawbacks. First of, it would never have been possible to convert this ship using a parallel hybrid system due to space. Also if this ship were to be using a parallel system with a 48V system, the power required to propel it electrically wouldn't be sufficient and you would be drawing high amps all the time to just motor at slow speeds. You also need the power of the electric motor for meneouvering, with a parallel system you would need the diesel for this. These are just some of the reasons we prefer serial hybrid, you also mentioned some other benefits👍. A drawback of serial is that the generator cannot power the propeller directly, but this is something we're working on.😉
@@stokelectric Thanks for your reply :) Yes surly good batteries is needed - but I doubt they would outlast a yanmar diesel engine? I do not think someone would add a 30kw generator in addition to a conventional diesel in this size yacht either. Is the cost estimation exclusive the propulsion line shaft/propeller....and tax? Pending on the system set-up a 48V should be proper for a sailboat this size for slow speeds and manoeuvring in normal condition....which I'd like in a parallel system...but surly you cannot get enough power for full speed or manoeuvre in gale conditions etc. The Achilles heel is a full stop and emergency reverse I guess....but again pending on the system a modern engine do not need a long time to start up either. The benefits as I see it is going electric at slow speed and diesel on the long-runs...together with eliminating an extra generator/diesel engine - still having back-up and possibility to re-gen. Also using electric power to motor-sail to not under-loading the diesel engine. 48 volts just feel safer and not adding more complexity than already onboard - but this might be a fear without reason :) In my area(western-Norway) sailing is mostly for fun and not so much for getting from a to b - cause of geographical challenges, so pretty dependent on good motoring-solutions year round for getting around. I must say though - the diesel I've filled on any tank on any of my boats - mostly go to heating ;) Would be very interesting to know more about the system you're working on with a direct drive function as well - is there any more info on this somewhere?
Looks like an extremely well designed and executed version of the old (since 1920s, I guess) diesel-electric train, here with a large battery buffer. Not to talk this down - but the concept is well understood in engineering and heavy industries. It can take out loads of transmission losses. And it does here with the direct-drive electric motor. As electric motors have become much better in the past decades, it becomes more attractive. The hydro-power of 5 kW at 8 knots to me is surprisingly high - wasn't aware of that. And running the Yanmar under load, probably at constant RPM, if/when it runs, generates the question if that engine could be an industrial static type built for, say, 100,000 hours (11 years at 24/7. That is relevant - imagine you drove 300,000 km with your car at an average speed of 50 km/h then that only constitutes 6,000 running hours. And at industrial scale that is "nothing". Yes, such an engine would still have its planned maintenance).
Thanks for your reply. I just want to point out that the 5kW regen is a theoretical value, we forgot to mention this in the video :). In practice this will be lower, we don't know by how much yet. The generator won't normally be used that often, it also runs at a variable speed depending on the battery charge and required power.
From SOBRADINHO, satelite City to the north of Brasília, capital of BRAZIL... congratulations. family above all. string family, strong Society . keep the DIALOGUE , ALWAYS...
I really hope someone can make one of these electric systems work without being reliant on a generator. Sailing UMA has been trying their best to get one of those props to generate enough electricity to recharge the batteries, but so far it only realistically generates basically enough to keep the electrics from draining battery power while under sail.
Of course this system is also suitable to run without the generator, but we only recommend this for coastal and inner water sailing. Regeneration through solar, wind and water are all an option and depend on each ship and ones preferences. From our testing the regeneration values will say for how long we can run without generator, but we are very optimistic about these results
@@stokelectric Yes, if you’re in the Caribbean with plenty of sun the combination of prop and sun seems to be able to sustain the batteries. Unfortunately, trips to Norway and north with little solar seem to require a lot of generator time to keep the batteries charged. That said, please don’t give up on innovating and trying to reduce the need for fossil fuels to live off grid.
@@darrylcox236 Just like you say, there are a lot of factors to take into account how much/if at all a generator is needed. For safety we use it, then it's up to the end user how much it's being run. Fortunately battery technology is increasing fast and in the future it will become more and more easy to run extended periods without using the generator
@@FeeltheBreeze I've 3 god daughters, 2 are younger ones ....ive taught Reception up... Including yr 1 special needs 🧙♂️ So been there and got the full set of T shirts. Show a toddler an open space and 90%will get the screaming zoomies.
On a single charge about 2-4 hours at 5 knots depending on the conditions. This should be enough for a normal day sailing. This range is simply limited by the amount of space available on the yacht. That said, if the generator turns on the range is increased dramatically.
I wonder how much fuel to be consumed to fully charge 39kW battery system. and what is the charging rate relation to speed of yacht. 5kW at 8kn sounds very good but 8kn is not what I get. how much the hydro generates at 3kn speed?
In case of a lightning strike, nothing would happen since the system is separated from the hull. All the current will follow through the hull into the water.
@@stokelectric I’m not sure that’s possible is it? I maybe wrong yet, as far as I’m aware the power from a lightening strike is much like the power from a coil to a spark plug. It jumps to the nearest earth ie the weakest point in the system. So if the lightening conductor is damaged then it will jump to the motor or prop shaft and out through the bottom of the boat?
@@midnightmiddleton in case of an aluminium hull, which this yacht has. The current will follow through the mast, directly through the hull and into the water. The motor is completely isolated from the hull and the shaft. However this is not easily tested (also wouldn't prefer to test it😅). So I based these statements on purely theoretical knowledge.
@@FeeltheBreeze Theres a few channels that have fitted them Gone with the Wynns, RAN, Sailing Atticus, Ruby Rose will be using them but dumping a gen-set on their new cat. But the real expert is an English guy Dr Nigel Calder who helped develope them . We are talking about an alternator capable of putting out 285amps and producing 60%plus power at little more than tick over speeds and way below engine optimum power revs. Wait for links.😉 ruclips.net/video/0uTNjfb3MNQ/видео.html ruclips.net/video/XRJjkRx1KbU/видео.html ruclips.net/video/T_LQSKPm_O4/видео.html Sailing Oceans ...their Trimeran ruclips.net/video/njOOvfLY1z0/видео.html repower.
I was not aware of these alternators. But thanks for showing me. For our generator we have couple an electric motor to the output shaft and bell housing (normally the gearbox would be mounted here). This way we don't require a large alternator and are free in designing the required output voltage and power of the generator.
@@stokelectric Thanks guys youve got a good grasp of whats needed. I'd love to understand better the sizes and arrangement of generator and motor. From RC models and electric flight a general rule of thumb with electric propulsions is more smaller props and motors work better than single large units unless they are very large and can turn relatively slowly.😁 But you're fitting a system to a existing single prop design anyway. Your logic in running the yanmar at relatively optimal speeds and loadings then matching the generator is spot on 👍🏼... Ive even advocated exploring using new generation heavy fuel rotor wankle engine s as used in some aircraft APUs where wt. and size vibration and noise are a major issue. Typically an advanced wankle motor of one or two rotors 75-130bhp is the diameter of a large round biscuit tin or two stacked on edge and weighs about the Wt of a standard starter battery. So you can pick one up and pass it out a standard size 60cm hatch without assistance.😁😎 What some boat owners are doing is fitting two high output alternators on to their engines. One might be a 12V or 24V or 48v, 72v .. or two of the same voltage .. My interest is what could the DIY innovator do 🇬🇧😉. My thought went straight to a configuration used by early E Flight Models but reversed ..ie 4 motors driving one geared or belt drive large prop...🤔 In this scenario though it would be one smaller very efficient Engine driving multiple high output alternators, as traditional generators often seem to be even more problematic than even ordinary propulsion Engines, as each Alternator is a self regulating unit if one fails then you have built in redundancy.... short of a seizure🤔. I know the Polish family from sailing Oceans and they were considering how to best repower their Trimaran Poly . They have a near identical low hrs. Yanmar which was used direct ...the original 75hp volvo and the original faulty generator . They would like to go electric but the cost of batteries is a problem they have loads of solar though.... and they are in Gdansk so have a lot of useful people around them .But a lot of Sailors not only dislike mutihulls but are fixated on Diesel's. 🙄🤦🏻♂️ Americans are not the only ones addicted to burning this horrible stinking stuff. The fact is if they ran three E motors . Two - smaller pod ones in each Ama and one on the existing single center drive they would get better handling in confined environment s and improved power delivery underway using less fuel and savings on maintainance and reliability.
I am worried that the generator is a bit too powerful for those batteries. When you compare this to electric cars you have to remember that electric cars have thermal battery management systems (i.e. massive cooling systems for the batteries). And with these thermal battery management systems keep the battery temperature down when they do 0%-80% recharge in 20 or 30 minutes depending on which car and everything is OK. But without the thermal battery management system, then electric cars would be recharging much slower because all that extra heat is not good for the batteries. So if these guys are recharging in 0%-100% in one hour without a thermal battery management system then I'm worried because I didn't see any cooling system for those batteries. If they tripled that amount of batteries (with the same generator) just so that they recharge slower then that would keep the temperature down when recharging.
I understand your concern but we took this into account. Lets start by saying that the Super-B batteries are designed to be charged at 1C, just look up the datasheet of the Nomada 12V105Ah. Besides this, the heat generation is quadratic with the current. So when the generator would be running at 30kW, which would only be in absolute emergency cases we would be charging the batteries at 0,8C. This would result in 30% less heat compared to 1C. When we reduce the generator output slightly, to 25kW, the charge current would be 0,64C which would result in 60% less heat compared to 1C. In these situations the batteries wouldn't overheat. Also, the BMS measures the internal battery current and can switch of the charger or even the whole system if an overtemperature is reached. And as a last point, the batteries are placed low in the ship, close to the hull. So the ambient temperature will always remain cool. Therefore, this is nothing to worry about. I hope this clarifies things.
Yes exactly!:) To be able to cross oceans safely you need a backup power source, which is why we use a generator. For short sailing trips "weekend sailing" a generator won't be necessary.
@@FeeltheBreeze a generator, which is a diesel engine? How else does it generate electricity? Still the same maintenance hazzle. I don't know if you can call it a backup solution if the entire battery-bank can be consumed within approx 30 minutes by the electric motor itself 😊
Yes there is still maintenance for the diesel generator. But it's more reliable because it's used correctly, running for an hour and getting nice and hot at good rpms. And also, depending on the user, it doesn't have to run that often.
@@stokelectric Heres an new insight to alternative generator ICE power ...liquid rotary pistons. ruclips.net/video/10SZdOElG1A/видео.html The really interesting bit is at the end for liquid piston rotary motor size wt and powers in HP For size 🤯😎🤞🏼👍🏼 simpler and turbine smooth.
According to the calculations we expect 10 days of anchorage without running the generator or having solar, this is based on the total combined battery capacity of 48kWh. The calculations are based on previous power usage measurements.
@@stokelectric thank you for the reply. If I wanted to put this set up in. Catamaran, would two entire systems be needed or can the generator split the task to the batteries for two electric motors?
@@chilly6883 just from the top of my head, splitting the power should be possible but I don't think this will be easy. Then again, we haven't looked into this setup for catamarans yet, so I can't say for sure. It might also upset the balance of the ship if it's not placed in the center. If you're seriously considering this please contact us through our email on the website and we can discuss further.
It won't run at 30kW permanently, we can freely scale this up or down depending on the situation. Just like you do with a normal diesel engine. Nominal output would be around 20kW, to run at the optimum load for the engine.
You can also improve cooling to the motor easily enough... Increasing the flow and heat exchange system. Diesels can be also be usefully turned to increase efficiency and power output... With or without Turbos.
Take a look at this third item ...look at the new range of motors these guys are fielding esp. the smallest at 70KW ruclips.net/video/wWZmfcPwF3o/видео.html The shorter but highest output motor is 180kw with huge torque but the middle size ones have their inverters built in.
If you mean The drive concept yep its been used for decades ...but this is vastly lighter smaller, compact and more efficient..and safer... No chlorine gas leaks. Uses on Trains Earthmovers and heavy plant as well as generations of ships and none nuclear subs... Except on the latest super stealthy Danish subs ...they go quieter still and use a Sterling engine 🤫....🙈🙉🐬
@@rickylefleur2158 Check it out the US borrowed one after it 'sank' one of their Aircraft carriers and some escorts in a Nato exercise .. and disappeared... they couldnt find it so they learned from the Vulcan episode being navy and asked to borrow one to make sure they could maybe stand a chance... they are also quite small but carry advanced torpedoes and mines..😁 Small sneaky and deadly...to sum up.
is charging lfp at 1C recommended - No - also see vids from MarineHowTo on lfp - 70Kw drive / 29KW batt / gen 30KW / prop 5KW do some maths on run time with only 80% power from Batt (lfp's don't like 100%-0% usage) and don't forget the boat use for lighting/computers/anchors etc etc - gen should be 80KW + to run drive + boat and then get 20-30 min emergency use from batts - How many times have you been sailing at 1 knot and needed to motor 6 hours, again do the maths - how far on your diesel ??
We're not charging the batteries at 1C, this is a future option and is also not harmful if done correctly. Our expected range you can find on the website but during our first test run we only used 10kW to reach 5kn, you do the math. Thus, with the 30kW generator we can easily maintain this speed while also charging the batteries and while still having the full 70kW available on the electric motor for propulsion peaks.
@@stokelectric wow so 3 hours at 5 knots if the gennie fails and they do often - then no electronics / navionics look at some of the cats pulling them out - KISS
@@jimlofts5433 this is the same for a conventional diesel engine, if the engine fails you have nothing. With a hybrid system you at least still have redundancy with the battery bank and the generator. And since we're using a Yanmar engine which is normally used for propulsion, it shouldn't be any less reliable than any other diesel engine
I find it kinda annoying that the interview was kinda staged. You asked the guys a lot of questions that had already been answered. I only mention it as a constructive reproach 🙂
When it comes to generating heat direct burning Natural gas is better than allowing it to escape into the atmosphere. Methane being 16x more powerful as a greenhouse gas than CO2. So a sewage to gas digester might be useful on a big boat ....like they do on cruise ships... they use the gas to power sub systems.😂
60k for a diesel engine for a sailboat? 60k of what currency? Euros? Who in their right mind would spend 60k euros on a sailboat diesel engine? And you need to swap your diesel out several times over the life of the boat? Seriously? And their system will never wear out? Seriously? And it will never need parts? Do they have a bridge they can sell me, too? I'm really interested in electric on my sailboat, and am currently working on a conversion. But some of the numbers they are throwing around and the assumptions they are making are simply insane. An oceanvolt saildrive system is already hopelessly overpriced at 25k, with batteries. And they think there are enough sailors out there who can shell out 100k for a motor? The world has gone bananas.
60k for a diesel engine is based on a modern engine including everything that comes with it, plus the added generator. It doesn't seem too much for a ship like this. Maybe communication wasn't quite clear in the video for which we're sorry. An electric system has no moving parts, so what's there to wear out. Yeah sure electronics age as well, but far less quickly than any moving mechanical engines. The 100k system isn't suitable for smaller yachts because it simply isn't worth spending that kind of money on a yacht with 30k value. But these larger yachts with a very long lifetime are worth converting for this amount of money. 100k on a yacht worth 1mil suddenly doesn't seem that crazy at all. Besides youu state that 100k is the cost for a motor, 100k is the cost of the whole system. And believe me, if we could we would make the system cheaper. No point having an expensive system which you could also sell cheaper and sell more of... But it's a simple fact that the components, mainly the batteries are expensive. These will go down in the future, but there's nothing to do about it. So I have to disagree with your statement "the world has gone bananas", it's simply an expensive system because it isn't for the masses yet, and at this point in time it's also not possible to make it available for the masses, which would reduce price dramatically as well. I hope I clarified some things for you.
Most diesel engines are replaced after 20 years. In sailboats they're relatively unreliable because they're not being used correctly by most people. It's run to get out of the harbor for 15-30minutes, while only running slightly more than stationary, this is bad for the engine and thus it becomes unreliable. As was the case for the yacht in the video.
They also get clogged up in tropical waters ..the waterpumps disintegrate like old fan belts and the Fuel and the tanks suffer with contamination and diesel bug .. Which is literally a growing problem.
@@stokelectric Guys check out a young German guy ..your age with a DIY E conversion of a Shuttle/ Catamaran life boat its on U-tube and called the Heart of Gold.
The concept of a hybrid system is not revolutionary. But fitting it in a boat like this is. Keep in mind the generator is only there as a backup and for emergencies, in all other situations you're powered from the batterybank.
I've never been on a submarine so my knowledge about them is limited. In general the concept might be the same, but that's not what it's about. It's very difficult to design a small, simple, user friendly and user maintainable hybrid system. Besides this the diesel generator is only there as a backup and won't normally be run.
We are so enthusiastic about the whole concept of STOK Electric, the way of thinking, the spirit of these two young entrepreneurs, the balls of the owner of SY Elysium and the numbers they showed, one remark has to be made, the hydro generation of 5kW is theoretically possible and they will show us the numbers as well when they do the sea trial. If this is the case they don't need solar power for extra charging which will be beneficial for the aesthetics of the classic lines. If you are interested please have a look at www.stokelectric.com and @sy_elysium on Instagram. The owners of SY Elysium want to work and live aboard while sailing the world. Feel the Breeze and #beincharge with SuperB Lithium Iron Phosphate Batteries www.super-b.com
Waarom bouwen jullie je boot niet om naar electrich ? Lijkt mij iets wat niet alleen goed is voor het milieu maar het verdient zichzelf terug.
I found Elysium last year... 😎👍🏼⛵ When they first installed and tested the electric motor.
@@PetervanderPalm
The e motor isnt the problem, the cost of batteries and solar capacity on a monohull is. BYD blade cells could be even better and theres new cells and chemistries coming along.
However the Diesel electric route and regen under sail is a very good next best for cruising and live aboard's now.
Especially now fossil fuels are on the extinction list. 8-10yrs.
See sailing uma and the polish sailing familly Sailing oceans rebuilding their Trimaran Poly and going down this very route probably. 😎😁 Plus with multi motors and a big area for Solar they get the ability to tank turn in tight spots... They can pour in a lot more free Solar and they already have a virtually new Yanmar that size .
Diesel electric drive is a very old and time proven system for high power and economy and reliability. On land in locomotives and water in ships..
@@clivestainlesssteelwomble7665 Even Sailing Uma has a generator, for those times there is little sun and sailing.... but it is a backup and it can be relatively small.
So freaking cool! Two dutch guys already setting a new bar for electric sailing. 💪⛵️
Great to hear Nanno, these guys are really one of kind, so full of passion, they know exactly what they are talking about and already working together with these brands, looking forward to their journey and can't wait to see the sailing yacht under sail.
These brothers are going places. Super impressive!
In an electric way ;)
I was always a fan of this channel! Love these guys and admire the authenticity of how you share your life with us! STOK Electric, you guys are fabulous! Admire your work and all the research and dedication you have put into this beautiful project!! Awesome guys!! Hope to someday meet you all personally!
What can we say Bruno? Thank you so much for your support, would be great to meet one day and talk about the future of sailing.
Wow! awesome vlog. The brothers are amazing. WEll, electric is the way to go. Thank you for a very informative vlog. Stay safe and see you next week.
Great to hear Steve... see you next week ;) so nice to have you onboard our journey.
One of the best thought out electric propulsion systems I have seen.
It is a wonderful thing to see two young men that have figured out how th propel a boat with reusable energy. And that the entire energy system is isolated from the hull. These guys will be copied by many others in the future. And they will probably be very wealthy. Thank you for introducing them to the boating public.
You are very welcome Don, we believe passion, knowledge, partnerships are key to keep the competition ahead and they will.
What an incredible project these young brothers are developing. The electric system, or at least hybrid, is the future without a doubt. Kisses & hugs from this old Brazilian sea wolf.
Absolutely Eloi, the brothers are building the future, glad we could show this to you and Benjamin ;)
Very informative !!! Opened a lot of possibilities.... thank you for sharing this adventure !
Thanks for letting us know Bruce, really appreciate it
Well done of those young guy's, this is the future ! Thanks for sharing and bedankt :)
Thanks David, these youngsters are amazing, so knowledgeable and full of passion.
The most creative conversation I ever saw. I congratulate the team.
Thanks Krenar... really appreciate it.
This was a very good video. It answered so many questions about converting to electric.
Thanks, great to read it answered many questions
Thank you guys for a awesome episode again and your boat is just a beautiful piece of craftsmanship keep safe and warm regards 🇿🇦
You are very welcome Louis... this isn't our boat, we wish ;)
@@FeeltheBreeze well your boat is just gorgeous to
Thanks for that guys, a great eye opener. ..... you travels amaze! 💙
You are very welcome Mark, great to have you onboard
That's just absolutely amazing and innovative. Hope one day you can own this yacht!
Thanks Thomas, we love the fact it's a classic boat with modern technique. One day ;)
I love it. Being modular, It’s reallyIt really customisable, it simplifies the amount of systems that need to be maintained, and adds the benefit of having a serious electrical system to use day to day…. No doubt that this is 100% the future
Great to hear you love it Robbie, we had a blast and learned so much from them, the fact it's a very simple well thought setup makes it very attractive.
This was an informative video. i enjoyed watching it.
Great you enjoyed it
Nice system, beautiful boat. 👍👍
Thanks Clay, we love the fact of new technology and classic lines
Wow i feel so nostalgic watching you back in that beautiful land rover, and congrats on 30k subscribers!!!
amazing, simple technological breakthrough but provides extraordinary benefits, besides maintaining the aesthetics of the boat but also not taking up space on the boat, thank you young people.
Thank you very much:) We're trying to keep everything as simple as possible, which is quite difficult actually. Simplicity = reliability
We love the combination of simplicity, aesthetics and the passion of the youngsters
Wow this is by far the best interview i have seen in a long time. These guys are Brilliant and make explain all of it in detail. I am going to look at this company for when i buy my yacht. cheers guys all the best xx
Thank you for the positive reaction. We're looking forward to hearing from you in the future!
Impressive yanmar generator
This was indeed a very nice topic for your vlog! The electric propulsion was already on my wish list but I'll add STOK Electric to my favourites, although my ship doesn't seem to be long enough for their system (31 feet). Unfortunately this electric conversion still looks a bit beyond my budget for now but this episode sparked my enthusiasm!
Thank you for adding us. We also offer standard systems up to 10kW 48V, depending on your ship specifications this might be suitable.
buybj88 splàr ejrrç
Awesome goal! Go for it!
Checking the boxes of the list Henk
Thank you for showing us the future now!
You are very welcome... these guys are the future.
Thank You for taking on this project to show everyone sustainable alternatives . This planet is begging for help. Hats off to STOK Electric for such a well thought out system. Well done you two! - Breezer
Thanks Don!
Amazing!!
You are amazing yourself ;)
Very inspiring!
Thnks Jonny
These two young men are on their way to becoming millionaires! Clearly many hours of sea trails are ahead of the production of their creation, but wow! This is very exciting stuff! Many things have been powered by electric motors for decades but not to this level of efficiency. Very interesting for sure. Thanks for sharing.
Amazing story of these brothers indeed, 24 and 19 and so knowledgeable with a bright vision. Great to hear you like it.
Very impressive 👏
Thanks Joellyn for sharing this, really appreciate it.
Very nice video again. Europe seems far ahead of us here in the US regarding electric power generation and use.
Thanks Chuck, when Europe and US team up the change will be much faster
What a fantastic video and tutorial! Thanks all for this, wishing these folks well as they build themselves up. Great work all around, thanks for sharing!
wowwww. what a boats!!
Such a beauty
Great video, very well explained and I love the enthusiastic attitude of the 2 young entrepreneurs. Way to go. Question, what is the fuel consumption of the Yanmar per hour in order to keep on using the engines for a prolonged time. Let's say cloudy, misty days with no wind for days on end?
The engine is able to run at its most efficient point. We haven't done fuel consumption measurements as of yet, but these will probably be very good. Yanmar states 8L/h absolute worst case in their datasheet. But in reality this will be much less
Sweet.
Subscribed
Nice, thanks Kevin
Hybrid drive is the future for cars and boats. For powerboats most systems stay with diesel propulsion and run large generators off the engines, this means no genset required, plus the generators can turn the props on their own at slower speeds. For sailboats electric motors seem to be the propulsion of choice, Stok looks to have a nice system, but $100k is expensive. The good news, by the time you're ready to consider a hybrid system, the price will be 1/2 with better performance, possible even solar sails for more free energy. Something to look forward to in the future.
Thank you for the reply. Yes unfortunately the system is still quite expensive. Most of the cost are in the batteries. In the future, with better technology and availability these prices will drop.
Dont forget to Look at Silent yatchs solar catamarans set ups with parachute kite sail assist ....also an excellent get you home dismasted option.
Thanks for sharing, will have a look
Love this.
Thanks Dan!
Genial!
Piece of cake then! If someone is a millionaire, electric is the way to go :) Seriously though, those guys are far beyond the rest!!!! well done!!!
a big part of the costs are the batteries and they will drop in the future to make it more accessible, it's still early stage and these guys are indeed far ahead.
Great video, remembering what it was like from our circumnavigation in the 1980s, presently cruising the Bahamas in our electric sailboat. My wife's book is a good read, published by Austin Macauley of New York, literally a fictional story of sailing and adventure: "Seychelle and the Cannabis Yachties". It is very entertaining, hoping you will give it a read.
Cool, we will have a look at your wife's book, we are from Amsterdam and Cannabis always trigger us ;)
One thing I would like to here more about is how all those batteries impact other electronics on the ship. For example, can you go full induction on the range and electric for the oven, ditching propane for everything except maybe an outdoor grill? What about being able to regularly use an immersion circulator like a Breville Joule sous vide that draws 1100watts?
What about the impact on the anchor windlass?
Hi Andrew, they go full induction and they use the windlass a lot in their calculations since the owner is a future live aboard as well. If you want to know all the details please send the STOK brothers an email, they are happy to answer all your questions.
1500 watt wjíbg gervgreàtre ñetiv emísiîñs
Thanks for sharing that information, this is almost the ideal solution. Maybe the full ideal solution would be to get rid of the generator with solar power (it would perfect for catamarans for which the aesthetic downside is not that relevant). Hydrogenerator + solar power and you can cross the Atlantic! This is my dream.
Wow!
Indeed, WoW!!!
Bravo for the youth who have dreams. Real young entrepreneurs who apply their knowledge. Its should give you the taste to make an investment for an update of your electrical system of your boat. The idea of using the engine of this boat so as not to have difficulty finding parts for the repair is great. This is a very nice vacation for you. To take the time to increase your personal knowledge without being present because of a weather window. I waited for the charging time for the batteries. But do you know if you have to use the electric motor for your trips, what will be the autonomy of the batteries before restarting the generator motor for recharging. Thank you for this video
Thank you for your comment. Charging happens through the conventional 12V or 24V battery bank which is present on every sailing boat. This way it is very easy to connect solar panels, hydro pods or shore power to the system, because you can use conventional components. This keeps everything simple. Of course the big battery bank is charged through the generator and hydrogeneration as well. A big benefit of the connection between the 12/24V battery bank and the 350V battery bank is that the energy can flow both ways. So there is a lot of power available on the 12/24V side for household appliances.
It's on the bucket list André, who knows what the future will hold ;)
Wow, I am impressed with the mind of these two young people. When do you change your Yanmar? :)
As soon as possible, maybe they are looking for a second project ;)
That’s incredible. My fear is cost. Cost to repair and or replace. The environmental impact on old batteries is still unknown but may be worse for us all in the long run. Fear of fires (I know. Sounds strange that I’m not worried about a fire with my diesel. Lol). Electric cars in the US is stupid expensive to repair and or replace anything. I love that they are on the cutting edge tho. How inspirational. Thanks fam! Much love to you three! Oh and Big Ben!! Wow he is growing up so fast.
Cost often are an issue with these systems. And that's mostly due to the batteries, fortunately these will become cheaper in the future. Your fear of fires is completely understandable as there are many horror stories of batteries catching fire, this is the exact reason we went with LiFePo4 (LFP) batteries and not conventional Li-ion. The risk of fire with these LFP is reduced dramatically. There are even some video's going around of people shooting LFP batteries with guns, not very scientifically proof of course but still worth something. We try to do everything in our power to make the system as safe as possible, this is also the reason we use 350V to reduce the currents and fire risk. The world has to figure out a good way to give batteries a second life, for example in suburban areas as a backup power source. The batteries have a very long life if used correctly, the same goes for other electronics. I'm not saying it's impossible to break something, but I dare say it's a much more reliable option compared to a diesel engine. To minimize the chances of things breaking we keep everything simple and want to give people the option to easily swap out components if something breaks.
@@stokelectric I am impressed by what you all have been able to do. I don’t mean to talk down or bad about your creation so please don’t take it that way. I am excited for what you are doing and what the future holds. I really am. Thanks for the reply.
lithium battery recycling is leaping ahead exponentially now, and the new batteries produced from recycled ones are showing to have slightly better energy density. but this end of life is not until 20 or 30 years, and in the mean time they can have a very productive life as stationary storage cells.
I loved this video, I always wanted to know about how to convert a diesel sailboat to an electric one, thank you very much for sharing it
Great to hear you love it, we had the same and now we know it
Thanks for sharing this. I would have like to know if they use same propulsion battery banks as the "house bank" or if there is a separate cross connected system?
We use a separate battery bank for the hybrid system. So the standard house hold battery (12v/24v) remains in tact. This means you can use conventional parts for solar panels, shore chargers and what not. We do have a converter between the battery banks which works both ways, essentially coupling the capacity of the two banks. This increases the available household capacity by a lot, allowing for induction cooking for example. It also means the 350V battery bank doesn't require any special charge connection.
As far as we understood it's all one bank, we know they guys from STOK are reading the comments so it's up to them to reply.
@@FeeltheBreeze sorry guys, we forgot to show you that the normal household battery remains in place, we have the converter box we told you about to essentially connect them into "one large" battery.
Mantıklı yatırım...⛵🗺
I love Hutting yachts.
Definitely the way to go HYBRID
Yesss
this was really interesting and exciting to watch, my only question is how long could you expect a system like this to survive before major work needs to be done on it?
Thanks Kato, great to hear you found it interesting, this a question @stokelectric should answer, will forward your question.
@@FeeltheBreeze Thank you
Great question. So, the generator needs to have it's maintenance according to the schedule, it's used less so it will wear out less quickly. Also the generator is the only "maintenance intensive" part in the system, all other components are electronics. With age, some electronics might fail but we try to design it in such a way that the component would be easy to swap out, so no major issue there. It would even be possible to take a spare on an ocean crossing for example. The other big component that would eventually start wearing out are the batteries. They have a life of ~6000 cycles if used correctly, on a ship this is incredibly much since it most likely won't make a full cycle every day. So the expected life of the battery pack we estimate at around 20 years at least. Looking 20 years into the future we expect battery technology to have sky rocketed and be much more affordable and much better.
Not 39 kW, but 39 kWh.... but that is a detail. Hydro-generation and solar hopefully make it less needed to use the generator, but as a backup, it is great.
Sharp Kees... always the details....
That’s a clever design. Probably a more favorable system compared to ocean volt. The biggest beef with electric is eventually the juice will run out so there has to be a level of conservatism. You can see it on sailing UMA. But to have the engine work as a generator not for propulsion but to charge the bank is smart. You could increase the range 3 or even 4 time further then just a pure electric and frankly this kind of system will answer that question of where is the juice is going to come from and with the diesel only being used only an hour at a time to charge wow I bet you could cross an ocean without throwing a sail up.
You understand it very well. The diesel generator is there as a backup, with the efficiency of the Yanmar engine, which can always run at it's optimum rpm because it's charging the batteries and not propelling the ship, plus the possibility for 750L of diesel on this ship, crossing an ocean would not be a problem.
@@stokelectric it’s brilliant and a game changer
Wow what an episode,I think I like you're bucket list also check out tally ho. There building a beautiful boat using kabota
With electric nice to see you guys smiling
As always Denny from Minnesota
That's the plan to check out the bucket list. We will check them out, much love from us Denny, hope you gained some pounds again.
Nice video😃 Is approx 100k for this set up incl. the CPP propeller/shaft/thrust/CV-joint-system as well? I think 70k for a conventional dieselengine and transmission was a way to high cost-estimation🙄 Batteries would also need replacement. Hybride/electric boating is the future - maybe not for the best in all kinda set-ups...but cause of legislation. I really believe in hybrids for all the good benefits it brings in total (redundancy, back-up, re-gen, silent marina operation, house-loads, eliminating ekstra genset, hydraulics etc). BUT I'd prefer it to be parallel hybrid - so the diesel operate where best and completely as standalone for safety, then have all the other benefits and back-ups from a parallel hybrid system. Then you could also use a smaller el-motor and in 48V for less hazardous accidents😉 Especially I'd go parallel when shaft-line and engine beds is conventional anyway. A very nice reason for full diesel-electric as in the video is that you could place the genny and system anywhere onboard - cause it doesn't need to be inline....and then I feel it seems extra weird putting a diesel engine back in the middle of the saloon. Having the galley-sink above the 300V system components feels wrong - even as an IP installation....what would Murphy have said?😉 I guess the owner of the yacht has had his own input on how he/she would like this. Everything will break on a boat sometime so it's all about the total design/installation no matter if its electric or conventional. I believe these guys will have a bright future ahead - and market is heading down this lane. Legislation and emission restrictions makes it impossible to install an old unbreakable Gardner in a new build. You cannot get it CE certified. Today complexity is also added to diesel engines for this reason...turbos, intercoolers, electric control of all combustion, high pressure common rail, exhaust treatments++ So going for electric propulsion is not much more complex...and soon to be shelf ware systems. They used electric uboats in WW1 - so its not rocket science☺️ But designing a complete system and integrate it for best possible operation is the challenge yet I think🤓
Keep in mind that the 100k price includes a 30kW generator. When you add this to the cost of replacing a diesel engine, you'll end up near the 70k mark. Of course it depends on other factors which need to be changed with the new diesel engine. The batteries will last a very long time if used properly, it's not like general AGM batteries which need replacing every 6 years.
Like you say the redundancy is a big benefit of a hybrid system. I understand that you would prefer a parallel system instead of serial but this has a lot of drawbacks. First of, it would never have been possible to convert this ship using a parallel hybrid system due to space. Also if this ship were to be using a parallel system with a 48V system, the power required to propel it electrically wouldn't be sufficient and you would be drawing high amps all the time to just motor at slow speeds. You also need the power of the electric motor for meneouvering, with a parallel system you would need the diesel for this.
These are just some of the reasons we prefer serial hybrid, you also mentioned some other benefits👍.
A drawback of serial is that the generator cannot power the propeller directly, but this is something we're working on.😉
@@stokelectric Thanks for your reply :) Yes surly good batteries is needed - but I doubt they would outlast a yanmar diesel engine? I do not think someone would add a 30kw generator in addition to a conventional diesel in this size yacht either. Is the cost estimation exclusive the propulsion line shaft/propeller....and tax? Pending on the system set-up a 48V should be proper for a sailboat this size for slow speeds and manoeuvring in normal condition....which I'd like in a parallel system...but surly you cannot get enough power for full speed or manoeuvre in gale conditions etc. The Achilles heel is a full stop and emergency reverse I guess....but again pending on the system a modern engine do not need a long time to start up either. The benefits as I see it is going electric at slow speed and diesel on the long-runs...together with eliminating an extra generator/diesel engine - still having back-up and possibility to re-gen. Also using electric power to motor-sail to not under-loading the diesel engine. 48 volts just feel safer and not adding more complexity than already onboard - but this might be a fear without reason :) In my area(western-Norway) sailing is mostly for fun and not so much for getting from a to b - cause of geographical challenges, so pretty dependent on good motoring-solutions year round for getting around. I must say though - the diesel I've filled on any tank on any of my boats - mostly go to heating ;) Would be very interesting to know more about the system you're working on with a direct drive function as well - is there any more info on this somewhere?
Looks like an extremely well designed and executed version of the old (since 1920s, I guess) diesel-electric train, here with a large battery buffer. Not to talk this down - but the concept is well understood in engineering and heavy industries. It can take out loads of transmission losses. And it does here with the direct-drive electric motor. As electric motors have become much better in the past decades, it becomes more attractive. The hydro-power of 5 kW at 8 knots to me is surprisingly high - wasn't aware of that. And running the Yanmar under load, probably at constant RPM, if/when it runs, generates the question if that engine could be an industrial static type built for, say, 100,000 hours (11 years at 24/7. That is relevant - imagine you drove 300,000 km with your car at an average speed of 50 km/h then that only constitutes 6,000 running hours. And at industrial scale that is "nothing". Yes, such an engine would still have its planned maintenance).
Thanks for your reply. I just want to point out that the 5kW regen is a theoretical value, we forgot to mention this in the video :). In practice this will be lower, we don't know by how much yet. The generator won't normally be used that often, it also runs at a variable speed depending on the battery charge and required power.
@@stokelectric - and thank you. That was more or less expected. It's simply a very elegant solution - when done well, as is the case here.
31 mílebhydevßail boat doig zeró eñßîkñsvràge
From SOBRADINHO, satelite City to the north of Brasília, capital of BRAZIL... congratulations. family above all. string family, strong Society . keep the DIALOGUE , ALWAYS...
Thanks Elmar... keep feeling the Breeze ;)
Do they work with any new Yacht builders to set them up with the electric system like they have designed?
Yes, they are in contact with several yacht builders. Not sure if they are partnered already.
I really hope someone can make one of these electric systems work without being reliant on a generator. Sailing UMA has been trying their best to get one of those props to generate enough electricity to recharge the batteries, but so far it only realistically generates basically enough to keep the electrics from draining battery power while under sail.
Of course this system is also suitable to run without the generator, but we only recommend this for coastal and inner water sailing. Regeneration through solar, wind and water are all an option and depend on each ship and ones preferences. From our testing the regeneration values will say for how long we can run without generator, but we are very optimistic about these results
@@stokelectric Yes, if you’re in the Caribbean with plenty of sun the combination of prop and sun seems to be able to sustain the batteries. Unfortunately, trips to Norway and north with little solar seem to require a lot of generator time to keep the batteries charged. That said, please don’t give up on innovating and trying to reduce the need for fossil fuels to live off grid.
@@darrylcox236 Just like you say, there are a lot of factors to take into account how much/if at all a generator is needed. For safety we use it, then it's up to the end user how much it's being run. Fortunately battery technology is increasing fast and in the future it will become more and more easy to run extended periods without using the generator
The little man was having fun playing with the echoes 🙉🙊🙈🤣.. just be thankful its not an entire Nursery class ...😁😂🤦🏻♂️
Hahaha thanks Clive, always a struggle to balance ;)
@@FeeltheBreeze
I've 3 god daughters, 2 are younger ones ....ive taught Reception up... Including yr 1 special needs 🧙♂️ So been there and got the full set of T shirts.
Show a toddler an open space and 90%will get the screaming zoomies.
Super cool. That said, how many hours of average motoring can they get on a single charge?
On a single charge about 2-4 hours at 5 knots depending on the conditions. This should be enough for a normal day sailing. This range is simply limited by the amount of space available on the yacht. That said, if the generator turns on the range is increased dramatically.
@@stokelectric can you run the generator and power the electric motors simultaneously?
@@tjsakasegawa5466 Yes we can. So running the generator will deliver enough power for propulsion while also charging the batteries.
I wonder how much fuel to be consumed to fully charge 39kW battery system. and what is the charging rate relation to speed of yacht. 5kW at 8kn sounds very good but 8kn is not what I get. how much the hydro generates at 3kn speed?
Good they addressed lithium battery fire issues. They just lost The Felicity Ace ship. They claim EV vehicles got it.
Most EV use Lithium and not Life4PO
Did you go through Winkel North Holland?
Nooo, not yet.
Young, smart and fearless = entrepreneur…very exciting tech!
Yesss 🤩🙏
Complete nuts for any craft on open sea. Small interior waters: yes.
How does the system respond to a lighting strike? What prevention means are in place? 👍
In case of a lightning strike, nothing would happen since the system is separated from the hull. All the current will follow through the hull into the water.
Great question, looking forward to the reply of the guys.
@@stokelectric I’m not sure that’s possible is it? I maybe wrong yet, as far as I’m aware the power from a lightening strike is much like the power from a coil to a spark plug. It jumps to the nearest earth ie the weakest point in the system. So if the lightening conductor is damaged then it will jump to the motor or prop shaft and out through the bottom of the boat?
@@midnightmiddleton in case of an aluminium hull, which this yacht has. The current will follow through the mast, directly through the hull and into the water. The motor is completely isolated from the hull and the shaft.
However this is not easily tested (also wouldn't prefer to test it😅). So I based these statements on purely theoretical knowledge.
Im not sure but im wondering if there new generator is inspired by the new high capacity alternators running together.
Interesting one, do you have any experience or recommendations with the high capacity alternators?
@@FeeltheBreeze
Theres a few channels that have fitted them Gone with the Wynns, RAN, Sailing Atticus, Ruby Rose will be using them but dumping a gen-set on their new cat.
But the real expert is an English guy Dr Nigel Calder who helped develope them .
We are talking about an alternator capable of putting out 285amps and producing 60%plus power at little more than tick over speeds and way below engine optimum power revs. Wait for links.😉
ruclips.net/video/0uTNjfb3MNQ/видео.html
ruclips.net/video/XRJjkRx1KbU/видео.html
ruclips.net/video/T_LQSKPm_O4/видео.html
Sailing Oceans ...their Trimeran
ruclips.net/video/njOOvfLY1z0/видео.html repower.
I was not aware of these alternators. But thanks for showing me. For our generator we have couple an electric motor to the output shaft and bell housing (normally the gearbox would be mounted here). This way we don't require a large alternator and are free in designing the required output voltage and power of the generator.
@@stokelectric
Thanks guys youve got a good grasp of whats needed.
I'd love to understand better the sizes and arrangement of generator and motor.
From RC models and electric flight a general rule of thumb with electric propulsions is more smaller props and motors work better than single large units unless they are very large and can turn relatively slowly.😁 But you're fitting a system to a existing single prop design anyway.
Your logic in running the yanmar at relatively optimal speeds and loadings then matching the generator is spot on 👍🏼... Ive even advocated exploring using new generation heavy fuel rotor wankle engine s
as used in some aircraft APUs
where wt. and size vibration and noise are a major issue.
Typically an advanced wankle motor of one or two rotors 75-130bhp is the diameter of a large round biscuit tin or two stacked on edge and weighs about the Wt of a standard starter battery. So you can pick one up and pass it out a standard size 60cm hatch without assistance.😁😎
What some boat owners are doing is fitting two high output alternators on to their engines.
One might be a 12V or 24V or 48v, 72v .. or two of the same voltage ..
My interest is what could the DIY innovator do 🇬🇧😉.
My thought went straight to a configuration used by early E Flight Models but reversed ..ie
4 motors driving one geared or belt drive large prop...🤔
In this scenario though it would be one smaller very efficient Engine driving multiple high output alternators, as traditional generators often seem to be even more problematic than even ordinary propulsion Engines, as each Alternator is a self regulating unit if one fails then you have built in redundancy.... short of a seizure🤔.
I know the Polish family from sailing Oceans and they were considering how to best repower their Trimaran Poly .
They have a near identical low hrs. Yanmar which was used direct ...the original 75hp volvo and the original faulty generator .
They would like to go electric but the cost of batteries is a problem they have loads of solar though.... and they are in Gdansk so have a lot of useful people around them .But a lot of
Sailors not only dislike mutihulls but are fixated on Diesel's. 🙄🤦🏻♂️ Americans are not the only ones addicted to burning this horrible stinking stuff.
The fact is if they ran three E motors .
Two - smaller pod ones in each Ama and one on the existing single center drive they would get better handling in confined environment s and improved power delivery underway using less fuel and savings on maintainance and reliability.
I am worried that the generator is a bit too powerful for those batteries.
When you compare this to electric cars you have to remember that electric cars have thermal battery management systems (i.e. massive cooling systems for the batteries). And with these thermal battery management systems keep the battery temperature down when they do 0%-80% recharge in 20 or 30 minutes depending on which car and everything is OK.
But without the thermal battery management system, then electric cars would be recharging much slower because all that extra heat is not good for the batteries.
So if these guys are recharging in 0%-100% in one hour without a thermal battery management system then I'm worried because I didn't see any cooling system for those batteries.
If they tripled that amount of batteries (with the same generator) just so that they recharge slower then that would keep the temperature down when recharging.
I understand your concern but we took this into account. Lets start by saying that the Super-B batteries are designed to be charged at 1C, just look up the datasheet of the Nomada 12V105Ah. Besides this, the heat generation is quadratic with the current. So when the generator would be running at 30kW, which would only be in absolute emergency cases we would be charging the batteries at 0,8C. This would result in 30% less heat compared to 1C. When we reduce the generator output slightly, to 25kW, the charge current would be 0,64C which would result in 60% less heat compared to 1C. In these situations the batteries wouldn't overheat. Also, the BMS measures the internal battery current and can switch of the charger or even the whole system if an overtemperature is reached. And as a last point, the batteries are placed low in the ship, close to the hull. So the ambient temperature will always remain cool. Therefore, this is nothing to worry about. I hope this clarifies things.
If you have a generator as backup .. yes
Yes exactly!:) To be able to cross oceans safely you need a backup power source, which is why we use a generator. For short sailing trips "weekend sailing" a generator won't be necessary.
To have a backup for the backup ;)
What currency were they using when they quoted prices?
Euros
Customized Power! 💪 Impressive young men and collaborations ⛵ - 💦🌿🐟
Absolutely, thanks Monica
5kw of regeneration at 8 knots I want so see that.
Hi Roger, as you can see in our first comment this is in theory, very curious about the real outcome as well
75bkw baterß 15vhiúrßvreçhergibg
Nice video, but I don't understand the maintenance argument, oil etc.
Isn't that Yanmar a diesel-engine?
No, it's a generator as back up solution
@@FeeltheBreeze a generator, which is a diesel engine? How else does it generate electricity?
Still the same maintenance hazzle.
I don't know if you can call it a backup solution if the entire battery-bank can be consumed within approx 30 minutes by the electric motor itself 😊
Yes there is still maintenance for the diesel generator. But it's more reliable because it's used correctly, running for an hour and getting nice and hot at good rpms. And also, depending on the user, it doesn't have to run that often.
@@stokelectric
Heres an new insight to alternative generator ICE power ...liquid rotary pistons.
ruclips.net/video/10SZdOElG1A/видео.html
The really interesting bit is at the end for liquid piston rotary motor size wt and powers in HP
For size 🤯😎🤞🏼👍🏼 simpler and turbine smooth.
This mistreated planet is so happy knowing that this kind of inventors exits. Millions thanks guys.
That's a nice comment, thanks David
👍
Thanks Metin
@@FeeltheBreeze ☕🍫
🧿👍
Thanks, great you like it
It sounds to good ?? Iwill be very wary .
The future will tell
Did they say how many days it can run off a full charge?
According to the calculations we expect 10 days of anchorage without running the generator or having solar, this is based on the total combined battery capacity of 48kWh. The calculations are based on previous power usage measurements.
@@stokelectric thank you for the reply. If I wanted to put this set up in. Catamaran, would two entire systems be needed or can the generator split the task to the batteries for two electric motors?
@@chilly6883 just from the top of my head, splitting the power should be possible but I don't think this will be easy. Then again, we haven't looked into this setup for catamarans yet, so I can't say for sure. It might also upset the balance of the ship if it's not placed in the center.
If you're seriously considering this please contact us through our email on the website and we can discuss further.
@@stokelectric thanks I will, it's something I'm tossing around in my head.
Que pena que no están los subtítulos en español.
Sorry Daniel, there must be Spanish subtitels now
30 Kilo watt is a lot of heat for a small motor like that over a long time .
It won't run at 30kW permanently, we can freely scale this up or down depending on the situation. Just like you do with a normal diesel engine. Nominal output would be around 20kW, to run at the optimum load for the engine.
You can also improve cooling to the motor easily enough... Increasing the flow and heat exchange system.
Diesels can be also be usefully turned to increase efficiency and power output... With or without Turbos.
Take a look at this third item ...look at the new range of motors these guys are fielding esp. the smallest at 70KW ruclips.net/video/wWZmfcPwF3o/видео.html
The shorter but highest output motor is 180kw with huge torque but the middle size ones have their inverters built in.
70 kw batery hybréd ¹80 kw morter 15 mikeß topwß ßoeed
Looks like a german u-boat system to me....
The system is still in development, that's why it might look a bit messy still.
If you mean The drive concept yep its been used for decades ...but this is vastly lighter smaller, compact and more efficient..and safer... No chlorine gas leaks.
Uses on Trains Earthmovers and heavy plant as well as generations of ships and none nuclear subs...
Except on the latest super stealthy Danish subs ...they go quieter still and use a Sterling engine 🤫....🙈🙉🐬
@@clivestainlesssteelwomble7665 Hehe, the Sterling engine freaked the shit out of the Americans, as far as I remember. :D
@@rickylefleur2158
Check it out the US borrowed one after it 'sank' one of their Aircraft carriers and some escorts in a Nato exercise .. and disappeared... they couldnt find it so they learned from the Vulcan episode being navy and asked to borrow one to make sure they could maybe stand a chance... they are also quite small but carry advanced torpedoes and mines..😁
Small sneaky and deadly...to sum up.
....☝❤✌👍💪😁🇵🇭
😍😎🎉💙
is charging lfp at 1C recommended - No - also see vids from MarineHowTo on lfp - 70Kw drive / 29KW batt / gen 30KW / prop 5KW do some maths on run time with only 80% power from Batt (lfp's don't like 100%-0% usage) and don't forget the boat use for lighting/computers/anchors etc etc - gen should be 80KW + to run drive + boat and then get 20-30 min emergency use from batts - How many times have you been sailing at 1 knot and needed to motor 6 hours, again do the maths - how far on your diesel ??
We're not charging the batteries at 1C, this is a future option and is also not harmful if done correctly. Our expected range you can find on the website but during our first test run we only used 10kW to reach 5kn, you do the math. Thus, with the 30kW generator we can easily maintain this speed while also charging the batteries and while still having the full 70kW available on the electric motor for propulsion peaks.
@@stokelectric wow so 3 hours at 5 knots if the gennie fails and they do often - then no electronics / navionics look at some of the cats pulling them out - KISS
@@jimlofts5433 this is the same for a conventional diesel engine, if the engine fails you have nothing. With a hybrid system you at least still have redundancy with the battery bank and the generator. And since we're using a Yanmar engine which is normally used for propulsion, it shouldn't be any less reliable than any other diesel engine
6 mióevrabg gid
I find it kinda annoying that the interview was kinda staged. You asked the guys a lot of questions that had already been answered. I only mention it as a constructive reproach 🙂
Thanks for your feedback :). It was our first interview so the nerves were there, they might show through a bit haha.
Thanks for the feedback, always welcome
100 K ? LOL
A big piece of the 100k are the batteries and they will drop in price over time
Exactly a very large portion are the batteries. Besides we need these high prices from early adopters to be able to lower it for the masses later on
ironic that despite huge electric power and reserve that the cooker should be gas-powered 🙄
Dear Guy, can’t believe this is your take out. The refit is not done yet.
When it comes to generating heat direct burning Natural gas is better than allowing it to escape into the atmosphere. Methane being 16x more powerful as a greenhouse gas than CO2. So a sewage to gas digester might be useful on a big boat ....like they do on cruise ships... they use the gas to power sub systems.😂
The gas installation will be changed next year and an induction stove will be installed.
60k for a diesel engine for a sailboat? 60k of what currency? Euros? Who in their right mind would spend 60k euros on a sailboat diesel engine? And you need to swap your diesel out several times over the life of the boat? Seriously? And their system will never wear out? Seriously? And it will never need parts? Do they have a bridge they can sell me, too? I'm really interested in electric on my sailboat, and am currently working on a conversion. But some of the numbers they are throwing around and the assumptions they are making are simply insane. An oceanvolt saildrive system is already hopelessly overpriced at 25k, with batteries. And they think there are enough sailors out there who can shell out 100k for a motor? The world has gone bananas.
The numbers for every boat are different and you have to compare apples with apples to get bananas ;)
60k for a diesel engine is based on a modern engine including everything that comes with it, plus the added generator. It doesn't seem too much for a ship like this. Maybe communication wasn't quite clear in the video for which we're sorry. An electric system has no moving parts, so what's there to wear out. Yeah sure electronics age as well, but far less quickly than any moving mechanical engines. The 100k system isn't suitable for smaller yachts because it simply isn't worth spending that kind of money on a yacht with 30k value. But these larger yachts with a very long lifetime are worth converting for this amount of money. 100k on a yacht worth 1mil suddenly doesn't seem that crazy at all. Besides youu state that 100k is the cost for a motor, 100k is the cost of the whole system. And believe me, if we could we would make the system cheaper. No point having an expensive system which you could also sell cheaper and sell more of... But it's a simple fact that the components, mainly the batteries are expensive. These will go down in the future, but there's nothing to do about it. So I have to disagree with your statement "the world has gone bananas", it's simply an expensive system because it isn't for the masses yet, and at this point in time it's also not possible to make it available for the masses, which would reduce price dramatically as well.
I hope I clarified some things for you.
A lot of talking no sailing…LOL
We already did a test run past November. The boat is going into the water quite soon again :)
20 year old diesel becoming unreliable?
Most diesel engines are replaced after 20 years. In sailboats they're relatively unreliable because they're not being used correctly by most people. It's run to get out of the harbor for 15-30minutes, while only running slightly more than stationary, this is bad for the engine and thus it becomes unreliable. As was the case for the yacht in the video.
They also get clogged up in tropical waters ..the waterpumps disintegrate like old fan belts and the Fuel and the tanks suffer with contamination and diesel bug ..
Which is literally a growing problem.
@@stokelectric
Guys check out a young German guy ..your age with a DIY E conversion of a Shuttle/ Catamaran life boat its on U-tube and called the Heart of Gold.
This is not fully electric, it's a hybrid. Not revolutionary at all.
The concept of a hybrid system is not revolutionary. But fitting it in a boat like this is. Keep in mind the generator is only there as a backup and for emergencies, in all other situations you're powered from the batterybank.
Revolutionary for us ;)
LOL .... this is nothing new ... all you've done is re-design, modernize, and miniaturize the WWII diesel electric submarine.
I've never been on a submarine so my knowledge about them is limited. In general the concept might be the same, but that's not what it's about. It's very difficult to design a small, simple, user friendly and user maintainable hybrid system. Besides this the diesel generator is only there as a backup and won't normally be run.