9:15 the minus cable has to run in parallel with the plus cable. As far as I know this is to reduce the surface of the loop and thus reduce effect of the electromagnetic pulse of lightning on the inverter.
If lightning is a concern then lightning arresters and rods connected to a good ground mat are the best solution. Lightning is 1,000s of amps and quite capable of vaporizing anything smaller than around 25mm ^2 conductors.
@@robroysyd Exactly. I was thinking of indirect impact. When lightning hits something in the neighborhood. The amps create a huge electromagnetic field in the neighborhood.
@@paulfontaine7819 Yes it does but it also causes lots of current in the ground and potential difference between points in the ground. Keeping in mind that one side of the DC from the panels is typically connected to ground I'm still not seeing much if any protection afforded by insisting they're of the same length and physically tied together. On the other hand there's going to be a power loss due to the longer length of cable. There are scenarios where you really do want to keep wire length the same so impedances are the same e.g. batteries or capacitors in parallel.
As to routing both the negative and positive cables together, I suspect it has to do with EMC, a balanced pair is less susceptible to interference as well as less susceptible to emit interference (within reason of course). Even if the gear is well filtered and dimensioned, you will have some emissions. So a a grounded conduit to run the cables in as well as balanced routing (+ and - together) will minimize what little emissions are left. If you have RFI issues, it's most likely on the sections where you have only the negative or only the positive. Where I live, we've had a number of highly publicized problems where routing, cabling, filtering etc. had not taken the potential for emissions from the panel DC lines into consideration.
EMC engineer here, this is spot on. Large loop area means a lot of EM energy goes in and out, so you're both radiating interference (potentially disturbing others) and receiving lots yourself. Specifically in large circuits, this makes you susceptible to lighting damage. If a lightning strikes nearby, circuits with large loops induce kilovolts of transients and this kills your inverter and possibly the panels themselves. By running the return current in the same path as the supply, the loop area is minimized and so is the transient voltage.
@@johncoops6897 They do generate DC. But the load which is presented to them, i.e. the current drawn, isn't pure DC. You almost invariably have a MPPT and an inverter connected to that DC source, that even if filtered will induce AC currents in the wires, and the higher the current, the stronger the magnetic flux around the wiring, and the stronger the magnetic flux around the wiring, the stronger the emissions from it. Keeping DC cables routed together (i.e. balanced) and preferably shielded, even if in a grounded conduit, will minimize these emissions as the balanced routing will make the magnetic fields cancel each other out and the grounded conduit (for all intents and purposes a shield) takes care of the rest.
@@johncoops6897 A loop does not have to have any current flowing. It is still an antenna that can receive from other sources such as lightning strikes. And in this case it can also be a transmitter if the inputs to the inverter are not filtered as much as would be ideal.
Hi Andreas! I’ve been following your channel for a long time (and enjoy it very much) but this is my first time commenting. I wanted to thank you for all of your work to educate us mere mortals over the years. Your videos are always fascinating, very informative and frank and to the point. I’ve learned so much from your videos and wanted to thank you, sincerely for your contributions to technology and the maker community. Thank you also for sharing this latest video and your solar farm journey. Take care and fond regards from my daughter and I, from sunny England to sunny Switzerland 😊❤️
@@grubboy3514 Energy crisis in Europe is a big thing. And I would say that the recent hurricane in Germany isn't normal as well. Neither snow in Brazil. So yes I think the current climate is a bit off.
If you consider the whole life cycle of solar panels, that is, the costs of manufacture them and then process the waste once they reach their end of life, it is not as green as you might think at first. The current process to extract raw materials from earth to manufacture these panels are quite aggressive to the environment. Of course, costs are paid by poor people in the so called third-world countries, so you can easily ignore them.
Looks good, well done. In a small country called Lebanon where we have the most corrupt politicians, "everyone" is now installing solar systems to have electricity.
Love it - a whole neighbourhood getting together sharing and dealing with life in a way that makes it better for themselves and everybody else. Now you just need a large mountain that you can pop a retractable large mirror to shine extra sunshine onto the roof - you could call it Light Over Range And Nice - LORAN for short :-).
@@AndreasSpiess:). Once you get remote monitoring of the power generated set-up, it maybe worth just using a small signaling mirror upon the panels to see the effect. You could maybe with code enable a form of remote communication back home. Heck, imagine if the firmware in solar panels could detect an SOS, that would have benefits in some areas and a cool hack if viable.
Yep, this is the reason. Even strikes hundreds of metres away can kill an inverter if you have a big open loop. The induced voltage is proportional to the enclosed area. A follow up video with a bench top experiment is needed! :-)
Congratulations on the installation of the mounting system, the cables and the solar modules! The project is almost finished! We are looking forward to the 3rd video 🎬
Good fun. I had mine installed by an experienced team, already in 2014. My roof is a lot smaller, so I only have seven panels. That team managed to do the complete installation in about three hours, with 4 people if I recall correctly.
my neighbor also called a pro-team to do the installation, 16 cells. 2 guys done the installation of the rails and cells and wiring to the cellar in total 4 hours on two days, as a thunderstorm stopped them mid-work on day one. (electrician took his time connecting the cells to the grid (they gonna feed surplus-power to the grid))
Wind loading is usually calculated on 100 years of records, which doesn't account for freak winds, or the average changing over time - a flood region near us had to have all the houses raised by 1m due to changing averages -. We live in a high wind area on top of a hill, and a friend was cut in half by flying roof sheeting, so I would doubly make sure stuff can't fly away.
Yep, plus Switzerland is nuclear target, so one can expect quite huge blow once every major war is happening. Statistically just few times in existence of humankind. Ad securing stuff - steel cables are cheap. Goal is to secure things to not fly off the roof completely, not to prevent them from moving around a bit - actually some play gives more chances of stuff being pushed vs broken or bent. So a steel cable bolted to concrete on the edges and then strapping the panels etc.
@@AndreasSpiess Nuclear war and crisis it will wind up inflation so much that such insurance money will be basically wothless. Most insurers know this, and they do not hide it. If in doubt - try insuring your insurance payout against rare event of post-war hyperinflation to adjust it to restore your lost commodities - it will be very sobering for you trying to negotiate it. Smaller panels are raw commodity providing You direct resilience, just like bicycle or nuclear bunker. 1)Smaller panels use lighter glass but are calculated for exactly same impact resistance 2)probability - more smaller panels gives more chances of at least few of them avoiding being destroyed. 3)weight. In event of war it is easier to handle smaller, lighter items 4) redundancy and ability to split the system more easily to f.e. delegate part of it to someone who needs it. 5)higher 2nd hand market value - even without war smaller panels are easier to sell - lower transaction costs, more uses (f.e. on boats, RV's, mobile signposts, radio relays etc. ) . This is important also for optimist scenario - if one avoids nuclear hit, and technology progresses (multilayer cells, high mobility layer cells with quantum dots, pervoskite cells , thermoelectric/photovoltaic hybrid cells etc) , one will want to sell existing setup and upgrade, hoping to recoup at least part of cost.
Andreas.... THANK YOU. Beautifully and professionally produced, credits for this superbly done video. I remain amazed that ballast stones are considered enough and hope that over time this will be proved right, Here in Ireland I am certain it would not work.... we clocked over 166 KM p/h during one of the recent storms. But... time will tell? Thank you again...a very happy subscriber to your channel. Albert EI7II.
I live relatively close to Andreas and just checked the meteorological data and since the early '80s there hasn't been a single day where the 10min-average windspeed reached 20 m/s once.
@@Xoron Thanks for your comment. He (Andreas) is so very very lucky. I frequently hit 60-80KM P.h here at the QTH ( my Bresser Anemometer measures the data for me) .... that is why I have not ever considered standalone on roof mounting. I have been at the receiving end of a 107 Mph s( about 172 KM P/h) storm and was deadly afraid I would have no house left. Fortunately, even for us here in EI land.. those speeds are rare, very rare, ... but no amount of ballast would save you in those cases.
I am not sure if the ballast is the important part. Because the panels are very close to the roof there is not much space to enter below the panels. But, as you say: we will see…
very nice to see you all working together like that. and yes... i have enjoyed watching this video very much. it is also nice to see those details and finer points which are so important to get right. and to have those installer experience by somebody available on the job site to ensure things are done the proper way, with both safety and longevity in mind. and of course also compliance to know what is possible within all of the applicable regulations it was also a nice thing that you briefly showed those other projects. to highlight that there is such a wide diversity in solutions. because the situation can be very different. and especially when considering shading, access to roof (for failures). so many things... it is a real education to learn about. very grateful to you, to understand better. even just a little bit also i must say you did a pretty great job here to make the video enjoyable to watch, and get that balance right. looking forwards to the next video in the series & hope you all will be enjoying those new panels array
"Andreas, we need your help on the roof" "Sorry, I first need to shoot some cool drone footage for my channel" 😁 Wait a minute, there is a "Spiess" sign on the scaffolding of your brother's house! Don't tell me he's a solar power specialist 🌞
@@nkronert ;) please no jokes about any stuff on the panels. as a panel owner I find it highly offensive, even if it is only bird droppings - it reduces the yield!! ;)
Glad to see you made great progress on the project. Always nice to see neighbours coming together for a common beneficial goal. Looking forward to seeing the next steps, performance of the system and probably most valuable will be the comparison with the other system you mentioned so that one can make a more educated choise. Thank you for sharing
Really neat that the neighbors worked together. What a great way to bond. I bet you are much better friends now! Getting solar and batteries was one of the best upgrades we made to our house. We went with the Tesla Solarroof and Powerwalls. Even with crews of 5 or 6 people it took these pros about 3-4 weeks to remove the old ceramic tile roof, rehammer or add nails to every piece roof sheeting, put down underlayment, run the cables, install the solar tiles, wire the tiles to the 2 inverters, install batteries, and get the system connected to the grid. So, we paid for all that and I was glad we did. However, it would have been a great bonding project if we could have done it as a neighbor install. Unfortunately, that was not possible. At least Tesla now has the 25-year warranty support requirement.
Very interesting! I am an electrical engineer and have limited solar on my house and greenhouse. My project was just me doing what I thought was enough. Cheaper and much much less well done. I am really enjoying learning from your project. Great videos as always. Glad to be a Patreon subscriber.👍
We get now energy from the roof and for the moment do not need any energy from grid. We even can "sell" 50% of our production. I am curious when we have to buy the first energy in autumn/winter. And thank you for your support!
First Congratulations since this is indeed a Superb Project I actually also Recommend to everyone. Also doing it like that with the Neighbors is Very Very Important, awsome to do it together with all neighbors, improves the entire neighborhood. We will be waiting now for the results and also for the comparison of the results.
Good to see neighbours co-operating towards installation! Here, in last 10-15 years, neighbours don't talk and rarely if they do, they do it to fight. For wind, a small hole in roof and anchoring base plate with some cement/concrete work on top to prevent water leakage and adding strength is mostly followed. However they use PVC pipes to save money instead of aluminum pipes. i don't much about cables but in case of higher voltage dc, arcing is dangerous. Also earthing is very important here ... 3 earthings are required, one for panel structure, one for inverter and another one for lightening arrester. I am sure, after installation is complete, instead of checking whatsapp messages, most of the people will check realtime power on their panels (although in my case it is updated every 5 minutes). And by the way, drilling in concrete is the most irritating sound, so that should find a place in the video :-D
Fortunately, I have nice neighbors! And you are right, everything is grounded with thick cables. And a lighting protection is also mounted. I hope that I can connect to the Inverter to get faster updates ;-) But currently, we are watching the energy production like TV ;-)
Nice project. Looks very well done. I upgraded my 3kW system to 7.5kW last summer. And built some ESP8266 based modbus to MQTT readers to read the inverter. Btw, Basel was awesome, we really enjoyed it.
Nice video! Solar is becoming sick a good source of electricity. I live in the Netherlands and thought it would never work hear because of the weather. My brother in-law has a system and it cut his electricity bill in half. During these current times with energy costs going so high he most likely save 75% on his energy bill. Can not wait to see your experience!!
@@AndreasSpiess We have entered an era of cheap electricity. It's very similar to cheap food, cheap textiles, cheap steel, and cheap communication. It's astounding how much technology has changed the world in the last 500 years. Really it is. Gutenberg's printing press marked the end of the Dark Ages in Europe and the beginning of modernity.
Thank you for your inspiring videos, this series is very helpful! And i'm glad, that I see between all the beers also czech Staropramen. Greetings from the Czech republic ;-).
I actually went fully off-grid with solar power this past winter. I spent about $6k USD for 7kW of used solar panels, a 5kW all in one charge controller/inverter unit (Growatt SPF 5000 ES (US model)), and a 125 AH 51.2 V battery pack, plus the hardware to hook it all into my home. I've designed the system so I can expand it to up to 30 kW at some point in the future.
Cool project! We use too much electricity to go off-grid in winter. So this is a good choice for our small roof. My 10kWh battery will barely survive one long winter night...
Great job, congratulations! One note, when it comes to comparing cost with your brother’s installation: A sloped roof (especially a steep one like your brother’s) adds a lot to the installation cost. (Note all the scaffolding they had to construct, and work goes much slower.) Here in the US, roofing companies also charge more for steep roofs because they have to use more expert, higher-paid crews. What a fantastic project, I’m envious!
Love the community getting together to do projects like this. But just as an FYI, I installed 44 similar panels on my individual house in Japan, it took the company 1 day to do everything, with like 20 people of course! Of course, the high cost and the fun missed are a big difference.
LOL, re-discovering the old saying, "The harder you push the work, the slower it goes". I've seen project managers that push so hard that the project comes to a complete stop. There is a sweet spot of gentle pushing, and knowing when to back off. It takes a lot of experience to understand this idea. Too bad that they don't teach this at any management school (at least none that I've seen). 😃
I think a good leader should delegate more and control and support when the people are doing something wrong. I've installed Solar in a company also with only one leader who know how and even with bad language skills but he has taken time to to explain us what is to do and then we did our thing and he his. Sure on the beginning need to study the plan and calculate some stuff which thakes time. Maybe there where some wrong calculations that where wrong so they had to redo it. Or maybe the leader wasn't so experienced
I enjoyed this. Have put an article on the Discord where a Study was done by Johannesburg University on tracking pv panels versus fixed. Kind regards, South Africa
I think that the long minus is for having the same restistens to alle the panels, like a chrismas-light, see Big Clive example Great project, with a lot of learning incorporated and a lot of comming to together. Love it. Thanks for sharing your journey 👍
In this layout case it should be more to avoid an induction loop. Such loops with large surface are susceptiple to induced overvoltage if lightning strikes nearby.
Interesting. I also installed a small solar panel system and it is surprising how expensive it became and how little power it produce. That being said it is only 2 x 100W panels and 2 x Exide ES1350 GEL type batteries, but it is still enough to run my flat except the electric cooker in the kitchen. All my devices, phone, and tools gets charged from this little system as well as it runs my computers, 4G Internet router, LED-lighting, and my fridge. I turn off my fridge at night to conserve power and it has not been a problem so far. My panels are placed outside my windows (cannot be seen from the street) at the roof level on the third floor and are they are mounted with 3M VHB tape. It is my plan to add a Raspberry Pi to monitor the voltage level of the batteries and top up with a charger at night, if it falls below 12,4V. So far the the voltage levels of the batteries has been between 14,7-12,8V all regulated by my Vevor MPPT 40A charge controller and the batteries are usually fully recharged at noon the next day. While I have come to terms with the low power production and the low prospect of recouping my investment, I am positively surprised and happy to know that I will have power enough for what I need, in case of a prolonged griddown scenario. I live in Denmark so most people should have better conditions than me. Since I use a battery bank there's no regulations to comply with, and I am insulated from future idiotic Governmental decisions, policy reversals, and price hikes. If all goes well the solar system should give me between 15 to 20 years of somewhat trouble free operation.
Consider getting PZEM-017 to monitor your dc power . I made a few videos about how to hook one up - then get the data to raspberry pi and be able to display all the data via graphs of Grafana . ruclips.net/video/TbLLrlZ3deI/видео.html
the set up you have is about what you need for every major appliance individually. I don't see how approximately three such setups couldn't pay for itself in a year if you completely mitigated your usage. solar fridge vv i.pinimg.com/originals/f5/27/99/f5279909e1205f363ae44999c0002fe3.jpg
Do you have like 18V panels? (21V peak). If I check the price of these versus like the 300 Watt panels that output like 30 to 40V it seems that the 18V panels are a lot more expensive price per Watt wise. Not sure if you have insulated your fridge but I once saw a website with a guy that insulated his fridge and got a lot better efficiency. For the monitoring I would check an ESP32 or if needed a Pi a first gen Pi Zero. My Pi Zero W runs internet radio all spring and summer on a small panel with a 18650 buffer ups pcb. How does it run during the winter months?
Check out the new "carbon" lead acid batteries (aka "ultrabattery" but licenses and cloned worldwide). Also sold as "EFB" batteries for cars. Their biggest advantage is that they can stay discharged for longer time , but they also do not sag (their voltage drop is smaller) like normal lead acid and charge quicker. They are priced just like normal car starter battery and sold in car battery stores. Getting even smallest set of them to complement your existing system will prolong life of your install, esp. if you will install smart switch so they will discharge first, before discharging your normal batteries, and even better - if weather forecast will be taken under account. You can get very good , machine-digestible weather forecast from polish ICM goverment meteo service (i cannot paste link as google will remove comment as spam) . I hope this will help to keep your return of investiment by prolonging battery life. Using RPi is bit overkill as it consumes much power , There are very nice uC's able to do video generation , many running python. Actually one can also create analog or even mechanical "statistics" display - just think about using hour-glass , or water. So f.e. small "water pond" pump pumping water from bottom of hour-glass shaped bottle to the top , powered by sun. This will "integrate" the total sun input giving You daily average. In the night water will slowly drip back to the bottom. Ofc this is just example and you can design similiar analog circuits or do it all completely mechanical way so it is more intuitive. Good luck and greetings :)
Great content as always! I don't know if the dust will be a problem as time pass by, because it would impact directly in the system's efficiency, maybe we could see a panel cleaner based on Open hardware series soon lol!
Usually you would just wash the panels once a year, before the summer production peak. Cleaning that by hand would take less than half a day. Developing, installing and maintaining a machine/robot to do the same would take way more time and effort. I guess for really large installations, cleaning automation can make sense. But for small and customized projects like that, doing it by hand is just way more efficient.
Great work on setting this project up to do with your neighbors for many reasons. Everything from having a bigger net benefit to getting to know them better. Looks like your beer time went well. I wonder if there are similar coops in the US that perform similar functions to the one you found in EU?
Morning Andreas, will done on the installation of your solar, the UK as also seen an increase in solar installs Just Completed a 12Kw Job saving the customer 50% of the customers energy use. As i know you are a bit of a IoT fan, Shelly do a range of AC monitoring device’s, and the home assistant have a energy monitor using a ESP32 is worth a look. I have one question about snow, in the winter months no production, is there any solution to this. And on the MC4’s this will be the weakest point on the installation, my recommendation is that you don’t leave them exposed to water, the most call-outs for a faulty installation is MC4.
Some experts would say that the snow slips of the panels when the sun shines and it melts a little. That's why you have to be carefully under a roof with solar in the winter because it could come a avalanche down
I have a Shelly from before Solar. Now it shows weird values I have to understand. I will try to get the info out of the Huawei system (also because of the battery). I am also curious how snow will behave…
Great content, all i know about why the - cable need to run paralell to the positive is that in some cases it gives you wierd radio disturbances, had a remounting to do because of this where the clients wifi didnt work on his upper floor after they ran the cables the shortest possible way. why im not shure myself but i think you can find out since you are an electrical engineer. greetings from Sweden.
@@AndreasSpiess i googled some and i found this answer but no source "n theory, the switching frequency of am MPPT controller can and does introduce an magnetic field in the wires, and generate radio interference. But that same current is also spread out across the entire solar panel service. In affect, the panel is also a great big unshielded antenna."
In some cases you can get away with the longer minus (or positive) cable, effectively reducing the cabling length by 50% by using "skip or leapfrog wiring".
I had a look at what you mean. The disadvantage is that we would need much more extension cables between the panels because the initial cables only cover the distance to the next panel.
Looks pretty easy, comparing to do everything alone, welding a construction on the roof etc... The roll of cable was the heaviest to bring up the ladder... But it is not really comparable, my first system ist just 9 Panels. Nevertheless they serve my complete consumption right now, the electricity meter is turned off and i am powered by my UPS system 🙂 I am curious what you get out of your system. Cheers from Bulgaria.
I remember the weather in Bulgaria: It was sunnier than in Switzerland. So you are lucky... With just a ladder: I can imagine how hard this was! We were very happy with the lift.
Estoy impaciente por conocer los resultados. Gran trabajo de equipo que permite ahorrar, proteger el medio ambiente y hacer buenas amistades con los vecinos. Todo muy positivo.👌
Why did you keep the chimneys? We had exactly the same type and we just cut them down to half the height so that they would fit below the panels. They are even better protected from rain now. and we did not have to remove any panels because of them.
One you recover from doing the roof work... how about a video about the other end of those wires... and what the regulatory hoops you have in CH? Great video!
Family and neighbors work together, real community work that''s how we should always be! great work Congratulations.
Thank you!
Excellent! I hope this is the beginning of a new direction for this channel: 5 to 10 part video series based on interesting real world projects.
We will see…
9:15 the minus cable has to run in parallel with the plus cable. As far as I know this is to reduce the surface of the loop and thus reduce effect of the electromagnetic pulse of lightning on the inverter.
Thanks! Was wondering that. Luckily at 450V a bit of wire length is worth the extra safety.
Interesting. That makes sense! Thank you.
If lightning is a concern then lightning arresters and rods connected to a good ground mat are the best solution. Lightning is 1,000s of amps and quite capable of vaporizing anything smaller than around 25mm ^2 conductors.
@@robroysyd Exactly. I was thinking of indirect impact. When lightning hits something in the neighborhood. The amps create a huge electromagnetic field in the neighborhood.
@@paulfontaine7819 Yes it does but it also causes lots of current in the ground and potential difference between points in the ground. Keeping in mind that one side of the DC from the panels is typically connected to ground I'm still not seeing much if any protection afforded by insisting they're of the same length and physically tied together. On the other hand there's going to be a power loss due to the longer length of cable. There are scenarios where you really do want to keep wire length the same so impedances are the same e.g. batteries or capacitors in parallel.
As to routing both the negative and positive cables together, I suspect it has to do with EMC, a balanced pair is less susceptible to interference as well as less susceptible to emit interference (within reason of course).
Even if the gear is well filtered and dimensioned, you will have some emissions. So a a grounded conduit to run the cables in as well as balanced routing (+ and - together) will minimize what little emissions are left.
If you have RFI issues, it's most likely on the sections where you have only the negative or only the positive.
Where I live, we've had a number of highly publicized problems where routing, cabling, filtering etc. had not taken the potential for emissions from the panel DC lines into consideration.
EMC engineer here, this is spot on. Large loop area means a lot of EM energy goes in and out, so you're both radiating interference (potentially disturbing others) and receiving lots yourself. Specifically in large circuits, this makes you susceptible to lighting damage. If a lightning strikes nearby, circuits with large loops induce kilovolts of transients and this kills your inverter and possibly the panels themselves.
By running the return current in the same path as the supply, the loop area is minimized and so is the transient voltage.
Solar Panels are DC... there isn't any EMC.
@@johncoops6897 They do generate DC. But the load which is presented to them, i.e. the current drawn, isn't pure DC.
You almost invariably have a MPPT and an inverter connected to that DC source, that even if filtered will induce AC currents in the wires, and the higher the current, the stronger the magnetic flux around the wiring, and the stronger the magnetic flux around the wiring, the stronger the emissions from it.
Keeping DC cables routed together (i.e. balanced) and preferably shielded, even if in a grounded conduit, will minimize these emissions as the balanced routing will make the magnetic fields cancel each other out and the grounded conduit (for all intents and purposes a shield) takes care of the rest.
@@Teukka72 You got it right! Only if you mount on steel roofs, one can ease up a bit but this is not the case here.
@@johncoops6897 A loop does not have to have any current flowing. It is still an antenna that can receive from other sources such as lightning strikes. And in this case it can also be a transmitter if the inputs to the inverter are not filtered as much as would be ideal.
Hi Andreas! I’ve been following your channel for a long time (and enjoy it very much) but this is my first time commenting.
I wanted to thank you for all of your work to educate us mere mortals over the years. Your videos are always fascinating, very informative and frank and to the point. I’ve learned so much from your videos and wanted to thank you, sincerely for your contributions to technology and the maker community. Thank you also for sharing this latest video and your solar farm journey. Take care and fond regards from my daughter and I, from sunny England to sunny Switzerland 😊❤️
Thank you for your kind words! I appreciate it and such comments are the fuel for long nights ;-)
I work close to the brewery where Staropramen beer is made :) cheers! also thanks for sharing all those experiences and knowledge!
Good beer!
A fantastic episode. Now let us all seriously consider how to ease the climate crisis. Thanks, Andreas, for an inspirational episode.
Saying that we are in a climate crisis is a bit over the top don't you think...You've been watching to much Greta.
@@grubboy3514 Energy crisis in Europe is a big thing. And I would say that the recent hurricane in Germany isn't normal as well. Neither snow in Brazil. So yes I think the current climate is a bit off.
If you consider the whole life cycle of solar panels, that is, the costs of manufacture them and then process the waste once they reach their end of life, it is not as green as you might think at first. The current process to extract raw materials from earth to manufacture these panels are quite aggressive to the environment.
Of course, costs are paid by poor people in the so called third-world countries, so you can easily ignore them.
I agree that a radical change of our lifestyle would be best. But who wants it?
Looks good, well done.
In a small country called Lebanon where we have the most corrupt politicians, "everyone" is now installing solar systems to have electricity.
It is sad to see how your country again suffers. I was in the Beeka valley in 1982 (for the Red Cross) and saw a destroyed infrastructure…
Love it - a whole neighbourhood getting together sharing and dealing with life in a way that makes it better for themselves and everybody else.
Now you just need a large mountain that you can pop a retractable large mirror to shine extra sunshine onto the roof - you could call it Light Over Range And Nice - LORAN for short :-).
Cool name! But if I remember right, it is already taken ;-)
@@AndreasSpiess:). Once you get remote monitoring of the power generated set-up, it maybe worth just using a small signaling mirror upon the panels to see the effect. You could maybe with code enable a form of remote communication back home.
Heck, imagine if the firmware in solar panels could detect an SOS, that would have benefits in some areas and a cool hack if viable.
Neighbours actually talking to one another. How very uncommon.
Very envious of that project though.
We are fortunate in this respect!
As far as I know plus and minus wires should run close together so they do not take up a big voltage gradient when a lightning strucks.
I would have never thought about it! Do you have any resources for me to read up to learn?
@@thomasperri3294 I forgot where I picked it up, but googling "pv wiring lightning induction loop" will give results
Yep, this is the reason. Even strikes hundreds of metres away can kill an inverter if you have a big open loop. The induced voltage is proportional to the enclosed area. A follow up video with a bench top experiment is needed! :-)
Congratulations on the installation of the mounting system, the cables and the solar modules! The project is almost finished! We are looking forward to the 3rd video 🎬
It will come later. Currently, the panels work as expected…
Thank you for sharing this wonderful experience and congratulations Andreas and neighbors for your initiative!
You are welcome!
Thank you Andreas. Enjoy your summer break, looking forward to the next part when you return.
Thank you for your support! Summer break will officially start in July. So you will get a few other videos before.
Good fun. I had mine installed by an experienced team, already in 2014. My roof is a lot smaller, so I only have seven panels. That team managed to do the complete installation in about three hours, with 4 people if I recall correctly.
A fast crew!
my neighbor also called a pro-team to do the installation, 16 cells. 2 guys done the installation of the rails and cells and wiring to the cellar in total 4 hours on two days, as a thunderstorm stopped them mid-work on day one. (electrician took his time connecting the cells to the grid (they gonna feed surplus-power to the grid))
@@michaelkeller5008 extremely fast!
@@AndreasSpiess yeah, these guys were insane
More work than anyone would ever think ! It is nice that the hard part is all behind you now.
I totally agree. Now the harvesting began…
Herrlicher Erfahrungsbericht, der mich an Ähnliches vor zwei Jahren erinnert. Ich freue mich schon jetzt auf die Fortsetzung.
Es war schon jetzt schön dieses Video zu machen. Aber der Keller wartet noch...
Wind loading is usually calculated on 100 years of records, which doesn't account for freak winds, or the average changing over time - a flood region near us had to have all the houses raised by 1m due to changing averages -. We live in a high wind area on top of a hill, and a friend was cut in half by flying roof sheeting, so I would doubly make sure stuff can't fly away.
Yep, plus Switzerland is nuclear target, so one can expect quite huge blow once every major war is happening. Statistically just few times in existence of humankind.
Ad securing stuff - steel cables are cheap.
Goal is to secure things to not fly off the roof completely, not to prevent them from moving around a bit - actually some play gives more chances of stuff being pushed vs broken or bent.
So a steel cable bolted to concrete on the edges and then strapping the panels etc.
We have an insurance which pays for such rare events. But they can happen, I agree. And maybe I will say afterwards: I should have better listened ;-)
@@AndreasSpiess Nuclear war and crisis it will wind up inflation so much that such insurance money will be basically wothless. Most insurers know this, and they do not hide it. If in doubt - try insuring your insurance payout against rare event of post-war hyperinflation to adjust it to restore your lost commodities - it will be very sobering for you trying to negotiate it.
Smaller panels are raw commodity providing You direct resilience, just like bicycle or nuclear bunker.
1)Smaller panels use lighter glass but are calculated for exactly same impact resistance
2)probability - more smaller panels gives more chances of at least few of them avoiding being destroyed.
3)weight. In event of war it is easier to handle smaller, lighter items
4) redundancy and ability to split the system more easily to f.e. delegate part of it to someone who needs it.
5)higher 2nd hand market value - even without war smaller panels are easier to sell - lower transaction costs, more uses (f.e. on boats, RV's, mobile signposts, radio relays etc. ) .
This is important also for optimist scenario - if one avoids nuclear hit, and technology progresses (multilayer cells, high mobility layer cells with quantum dots, pervoskite cells , thermoelectric/photovoltaic hybrid cells etc) , one will want to sell existing setup and upgrade, hoping to recoup at least part of cost.
I love how even the pregnant lady celebrated with a (non-alcoholic?) beer! Great job !
We all are proud we did it. Every day we love to look at how much we produced ;-)
Wow, a community coming together to do the work, we don't have that here!
This is also not common here. But we were lucky.
@@AndreasSpiess This is how we will survive
Andreas.... THANK YOU. Beautifully and professionally produced, credits for this superbly done video. I remain amazed that ballast stones are considered enough and hope that over time this will be proved right, Here in Ireland I am certain it would not work.... we clocked over 166 KM p/h during one of the recent storms. But... time will tell?
Thank you again...a very happy subscriber to your channel.
Albert
EI7II.
I live relatively close to Andreas and just checked the meteorological data and since the early '80s there hasn't been a single day where the 10min-average windspeed reached 20 m/s once.
@@Xoron Thanks for your comment. He (Andreas) is so very very lucky. I frequently hit 60-80KM P.h here at the QTH ( my Bresser Anemometer measures the data for me) .... that is why I have not ever considered standalone on roof mounting. I have been at the receiving end of a 107 Mph s( about 172 KM P/h) storm and was deadly afraid I would have no house left. Fortunately, even for us here in EI land.. those speeds are rare, very rare, ... but no amount of ballast would save you in those cases.
I am not sure if the ballast is the important part. Because the panels are very close to the roof there is not much space to enter below the panels. But, as you say: we will see…
very nice to see you all working together like that. and yes... i have enjoyed watching this video very much. it is also nice to see those details and finer points which are so important to get right. and to have those installer experience by somebody available on the job site to ensure things are done the proper way, with both safety and longevity in mind. and of course also compliance to know what is possible within all of the applicable regulations
it was also a nice thing that you briefly showed those other projects. to highlight that there is such a wide diversity in solutions. because the situation can be very different. and especially when considering shading, access to roof (for failures). so many things... it is a real education to learn about. very grateful to you, to understand better. even just a little bit
also i must say you did a pretty great job here to make the video enjoyable to watch, and get that balance right. looking forwards to the next video in the series & hope you all will be enjoying those new panels array
Thank you for your kind words! An yes, we enjoy the „harvesting“.
Switzerland looks really beautiful! I hope I can visit one day 🙂
Yes, we like it here. And of course you are welcome to visit Switzerland.
Awesome! Looking forward to the rest
Glad you like the series!
Thank you for taking us with you on your journey.
My pleasure!
"Andreas, we need your help on the roof"
"Sorry, I first need to shoot some cool drone footage for my channel" 😁
Wait a minute, there is a "Spiess" sign on the scaffolding of your brother's house! Don't tell me he's a solar power specialist 🌞
No, his son is a painter and they painted the outside at the same time.
@@AndreasSpiess "I painted the solar panels as well. Don't you agree they look much better in white?" 😳
@@nkronert ;) please no jokes about any stuff on the panels. as a panel owner I find it highly offensive, even if it is only bird droppings - it reduces the yield!! ;)
I love the cooperation with your neighbors
Me too ;-)
Glad to see you made great progress on the project. Always nice to see neighbours coming together for a common beneficial goal. Looking forward to seeing the next steps, performance of the system and probably most valuable will be the comparison with the other system you mentioned so that one can make a more educated choise. Thank you for sharing
Next video will come after the summer break…
Really neat that the neighbors worked together. What a great way to bond. I bet you are much better friends now!
Getting solar and batteries was one of the best upgrades we made to our house. We went with the Tesla Solarroof and Powerwalls. Even with crews of 5 or 6 people it took these pros about 3-4 weeks to remove the old ceramic tile roof, rehammer or add nails to every piece roof sheeting, put down underlayment, run the cables, install the solar tiles, wire the tiles to the 2 inverters, install batteries, and get the system connected to the grid. So, we paid for all that and I was glad we did. However, it would have been a great bonding project if we could have done it as a neighbor install. Unfortunately, that was not possible. At least Tesla now has the 25-year warranty support requirement.
I can understand that it took some time. Our „tiles“ were much bigger and much less mounting and connectors were needed…
Very interesting! I am an electrical engineer and have limited solar on my house and greenhouse. My project was just me doing what I thought was enough. Cheaper and much much less well done. I am really enjoying learning from your project. Great videos as always. Glad to be a Patreon subscriber.👍
We get now energy from the roof and for the moment do not need any energy from grid. We even can "sell" 50% of our production. I am curious when we have to buy the first energy in autumn/winter. And thank you for your support!
First Congratulations since this is indeed a Superb Project I actually also Recommend to everyone. Also doing it like that with the Neighbors is Very Very Important, awsome to do it together with all neighbors, improves the entire neighborhood.
We will be waiting now for the results and also for the comparison of the results.
Indeed, we all wait for the first results and hope, next week will be sunny...
Love this project, Andreas. Waiting for the next part! Have a nice day🙌
You are welcome! The next part will come in autumn...
Good to see the care for even the small details, just like we expect it from our southern neighbours. Great 👍 Project.
Thank you!
Very informative Mr. Spiess, thank you. Also lovely to see you and your neighbours getting on together.
Thank you!
Andreas ,
I hope you live 100 years!
Thank you!
Good to see neighbours co-operating towards installation! Here, in last 10-15 years, neighbours don't talk and rarely if they do, they do it to fight. For wind, a small hole in roof and anchoring base plate with some cement/concrete work on top to prevent water leakage and adding strength is mostly followed. However they use PVC pipes to save money instead of aluminum pipes. i don't much about cables but in case of higher voltage dc, arcing is dangerous. Also earthing is very important here ... 3 earthings are required, one for panel structure, one for inverter and another one for lightening arrester.
I am sure, after installation is complete, instead of checking whatsapp messages, most of the people will check realtime power on their panels (although in my case it is updated every 5 minutes). And by the way, drilling in concrete is the most irritating sound, so that should find a place in the video :-D
Fortunately, I have nice neighbors! And you are right, everything is grounded with thick cables. And a lighting protection is also mounted.
I hope that I can connect to the Inverter to get faster updates ;-) But currently, we are watching the energy production like TV ;-)
Very nice update and love the Swiss dry humor! You have many similar roofs nearby to repeat your project also!
Go for it!
Nice project. Looks very well done. I upgraded my 3kW system to 7.5kW last summer. And built some ESP8266 based modbus to MQTT readers to read the inverter. Btw, Basel was awesome, we really enjoyed it.
Cool you enjoyed Basel! I have to hack the Huawei protocol to get to the data because it is an integrated system (with battery)
Nice video! Solar is becoming sick a good source of electricity. I live in the Netherlands and thought it would never work hear because of the weather. My brother in-law has a system and it cut his electricity bill in half. During these current times with energy costs going so high he most likely save 75% on his energy bill.
Can not wait to see your experience!!
If energy costs were low, solar wouldn't be worthwhile.
I am also eager to see the energies flowing ;-)
@@AndreasSpiess We have entered an era of cheap electricity. It's very similar to cheap food, cheap textiles, cheap steel, and cheap communication. It's astounding how much technology has changed the world in the last 500 years. Really it is.
Gutenberg's printing press marked the end of the Dark Ages in Europe and the beginning of modernity.
I am looking forward to the followup episode(s) on this!
It will definitively come!
Thank you for your inspiring videos, this series is very helpful! And i'm glad, that I see between all the beers also czech Staropramen. Greetings from the Czech republic ;-).
You have good beer in your country. We know that and drink it from time to time ;-)
As usual: fun to watch and informative: fantastic Andreas, well done !
Thank you!
Thank you for this detailed description of your solar installation.
My pleasure!
Thanks
You are welcome! And thank you for your support!
I just saw your Super Thanks on my PC (it is not displayed on the IPad). Thank you for your support!
I actually went fully off-grid with solar power this past winter. I spent about $6k USD for 7kW of used solar panels, a 5kW all in one charge controller/inverter unit (Growatt SPF 5000 ES (US model)), and a 125 AH 51.2 V battery pack, plus the hardware to hook it all into my home. I've designed the system so I can expand it to up to 30 kW at some point in the future.
Cool project! We use too much electricity to go off-grid in winter. So this is a good choice for our small roof. My 10kWh battery will barely survive one long winter night...
@@AndreasSpiess I understand. In my particular case, I heat the house with wood, so the power load is much lower.
@@MatthewN8OHU we also use wood for heating.
Quite the undertaking!
Indeed. I underestimated the effort. But finally we get electricity 24/7 and can sell about 50% of it. A good feeling...
Another reason I've been open to the idea of liquid wires rather than metal :p
Great job, congratulations! One note, when it comes to comparing cost with your brother’s installation: A sloped roof (especially a steep one like your brother’s) adds a lot to the installation cost. (Note all the scaffolding they had to construct, and work goes much slower.) Here in the US, roofing companies also charge more for steep roofs because they have to use more expert, higher-paid crews.
What a fantastic project, I’m envious!
He also used scaffolding to paint his house... But still, it will be interesting.
This is looking really nice, I've forwarded this video to my friend who is thinking of doing this as well.
Awesome, thank you!
Love the community getting together to do projects like this. But just as an FYI, I installed 44 similar panels on my individual house in Japan, it took the company 1 day to do everything, with like 20 people of course! Of course, the high cost and the fun missed are a big difference.
So they were much better organized ;-)
LOL, re-discovering the old saying, "The harder you push the work, the slower it goes". I've seen project managers that push so hard that the project comes to a complete stop. There is a sweet spot of gentle pushing, and knowing when to back off. It takes a lot of experience to understand this idea. Too bad that they don't teach this at any management school (at least none that I've seen). 😃
I think a good leader should delegate more and control and support when the people are doing something wrong. I've installed Solar in a company also with only one leader who know how and even with bad language skills but he has taken time to to explain us what is to do and then we did our thing and he his. Sure on the beginning need to study the plan and calculate some stuff which thakes time. Maybe there where some wrong calculations that where wrong so they had to redo it. Or maybe the leader wasn't so experienced
I agree, explanation would have helped. But it was not easy for the leader because we were his "customers". An unusual situation.
I enjoyed this.
Have put an article on the Discord where a Study was done by Johannesburg University on tracking pv panels versus fixed.
Kind regards,
South Africa
Thank you! I will have a look.
I think that the long minus is for having the same restistens to alle the panels, like a chrismas-light, see Big Clive example
Great project, with a lot of learning incorporated and a lot of comming to together. Love it.
Thanks for sharing your journey 👍
In this layout case it should be more to avoid an induction loop. Such loops with large surface are susceptiple to induced overvoltage if lightning strikes nearby.
I understand the lighting argument!
Fantastic, 2 more different Pv-projects to compare. I look forward to the results.
Me too!
Awesome work, you guys look to have made a great team
Yes, you are right!
Wonderful! What great neighbours, and a great location for solar!
I agree!
Hallo Andreas,
dass ist wirklich sehr interessant.
Danke für die Info.
Werner
Gern geschehen!
i press like before i start watching .
Thank you!
Love it! Thx Andi for this inspiring series
Glad you enjoy it!
THANK YOU, SIR.
You are welcome!
Great video, I really like the format, I look forward to your next installment
Thank you for your feedback!
What a nice way to work together!
It really is!
Wow this is super juicy!! Love the whole story and detail. Can’t wait for the next update.
After the summer break!
I watched your video with much interest. Well done!!
Thank you!
13:57 Du trinkst sächsisches RADEBERGER Pils? Hervorragende Wahl! :)
Das war von Jonas. Er kommt von dort!
@@AndreasSpiess Aha! Bier aus der Heimat! Dann grüße Jonas: Gliggauf aus Sachsen - mir sin ooch iberall!
Wow, what a great project! You really explained it well, it was a very interesting video - thank you for sharing!
You are welcome!
Job well done Andreas ! Thx for sharing your project, very informative for me.
You are welcome!
Great maestro!!!
Muy bien profe, que buen proyecto
:-)
great teamwork!
Thanks!
Well done!
Thank you!
Thanks. Interesting video. Have a good summer holiday.
The summer break will only start in July...
Cool project Andreas! I wish all my Neighbours in Lenzburg would also have this wish! 😃
Maybe next winter when they see their bills ;-)
woa, seeing the concrete houses & roofs is CRAZY !
in USA u have to be careful walking on the roof not to bend it, which leads to a break=water leak.
Indeed we have different building styles… But you also have skyscrapers ;-)
I'm sure it must have been a lot of fun !
Yes. But also work…
Interesting. I also installed a small solar panel system and it is surprising how expensive it became and how little power it produce. That being said it is only 2 x 100W panels and 2 x Exide ES1350 GEL type batteries, but it is still enough to run my flat except the electric cooker in the kitchen. All my devices, phone, and tools gets charged from this little system as well as it runs my computers, 4G Internet router, LED-lighting, and my fridge. I turn off my fridge at night to conserve power and it has not been a problem so far. My panels are placed outside my windows (cannot be seen from the street) at the roof level on the third floor and are they are mounted with 3M VHB tape. It is my plan to add a Raspberry Pi to monitor the voltage level of the batteries and top up with a charger at night, if it falls below 12,4V. So far the the voltage levels of the batteries has been between 14,7-12,8V all regulated by my Vevor MPPT 40A charge controller and the batteries are usually fully recharged at noon the next day. While I have come to terms with the low power production and the low prospect of recouping my investment, I am positively surprised and happy to know that I will have power enough for what I need, in case of a prolonged griddown scenario. I live in Denmark so most people should have better conditions than me. Since I use a battery bank there's no regulations to comply with, and I am insulated from future idiotic Governmental decisions, policy reversals, and price hikes. If all goes well the solar system should give me between 15 to 20 years of somewhat trouble free operation.
Consider getting PZEM-017 to monitor your dc power . I made a few videos about how to hook one up - then get the data to raspberry pi and be able to display all the data via graphs of Grafana . ruclips.net/video/TbLLrlZ3deI/видео.html
the set up you have is about what you need for every major appliance individually. I don't see how approximately three such setups couldn't pay for itself in a year if you completely mitigated your usage.
solar fridge vv
i.pinimg.com/originals/f5/27/99/f5279909e1205f363ae44999c0002fe3.jpg
@@kingmasterlord :D I might consider that setup... Thanks for the advice :)
Do you have like 18V panels? (21V peak). If I check the price of these versus like the 300 Watt panels that output like 30 to 40V it seems that the 18V panels are a lot more expensive price per Watt wise. Not sure if you have insulated your fridge but I once saw a website with a guy that insulated his fridge and got a lot better efficiency.
For the monitoring I would check an ESP32 or if needed a Pi a first gen Pi Zero. My Pi Zero W runs internet radio all spring and summer on a small panel with a 18650 buffer ups pcb.
How does it run during the winter months?
Check out the new "carbon" lead acid batteries (aka "ultrabattery" but licenses and cloned worldwide). Also sold as "EFB" batteries for cars.
Their biggest advantage is that they can stay discharged for longer time , but they also do not sag (their voltage drop is smaller) like normal lead acid and charge quicker.
They are priced just like normal car starter battery and sold in car battery stores.
Getting even smallest set of them to complement your existing system will prolong life of your install, esp. if you will install smart switch so they will discharge first, before discharging your normal batteries, and even better - if weather forecast will be taken under account.
You can get very good , machine-digestible weather forecast from polish ICM goverment meteo service (i cannot paste link as google will remove comment as spam) .
I hope this will help to keep your return of investiment by prolonging battery life.
Using RPi is bit overkill as it consumes much power , There are very nice uC's able to do video generation , many running python.
Actually one can also create analog or even mechanical "statistics" display - just think about using hour-glass , or water.
So f.e. small "water pond" pump pumping water from bottom of hour-glass shaped bottle to the top , powered by sun. This will "integrate" the total sun input giving You daily average. In the night water will slowly drip back to the bottom. Ofc this is just example and you can design similiar analog circuits or do it all completely mechanical way so it is more intuitive.
Good luck and greetings :)
Great content as always! I don't know if the dust will be a problem as time pass by, because it would impact directly in the system's efficiency, maybe we could see a panel cleaner based on Open hardware series soon lol!
Usually you would just wash the panels once a year, before the summer production peak. Cleaning that by hand would take less than half a day. Developing, installing and maintaining a machine/robot to do the same would take way more time and effort. I guess for really large installations, cleaning automation can make sense. But for small and customized projects like that, doing it by hand is just way more efficient.
I also hope rain will do its job. They promised that the panels with 10 degrees slope are „noclean“
Great job! Thanks for sharing.
Thanks for watching!
You WILL become a real solar harvestor. Solar power addicts you and your buddies. 🖖
It seems to be like Tatoos. If you have one you want another one ;-)
Super like! Very interesting. Inspirational.
Glad you enjoyed it!
Great work on setting this project up to do with your neighbors for many reasons. Everything from having a bigger net benefit to getting to know them better. Looks like your beer time went well.
I wonder if there are similar coops in the US that perform similar functions to the one you found in EU?
I do not know if they exist. But one reason of the video is to motivate my young viewers to start with one ;-)
Morning Andreas, will done on the installation of your solar, the UK as also seen an increase in solar installs Just Completed a 12Kw Job saving the customer 50% of the customers energy use.
As i know you are a bit of a IoT fan, Shelly do a range of AC monitoring device’s, and the home assistant have a energy monitor using a ESP32 is worth a look.
I have one question about snow, in the winter months no production, is there any solution to this.
And on the MC4’s this will be the weakest point on the installation, my recommendation is that you don’t leave them exposed to water, the most call-outs for a faulty installation is MC4.
Some experts would say that the snow slips of the panels when the sun shines and it melts a little. That's why you have to be carefully under a roof with solar in the winter because it could come a avalanche down
I have a Shelly from before Solar. Now it shows weird values I have to understand.
I will try to get the info out of the Huawei system (also because of the battery).
I am also curious how snow will behave…
Great content, all i know about why the - cable need to run paralell to the positive is that in some cases it gives you wierd radio disturbances, had a remounting to do because of this where the clients wifi didnt work on his upper floor after they ran the cables the shortest possible way. why im not shure myself but i think you can find out since you are an electrical engineer. greetings from Sweden.
I heard a similar explanation, but did not understand why...
@@AndreasSpiess i googled some and i found this answer but no source "n theory, the switching frequency of am MPPT controller can and does introduce an magnetic field in the wires, and generate radio interference. But that same current is also spread out across the entire solar panel service. In affect, the panel is also a great big unshielded antenna."
@@Arcticpagan others mentioned lightings as the reason which sounds reasonable to me.
So the load calculation should be 200kg snow plus 17kg solar panels. Very exciting stuff.
Yes, you are right. If we get snow. The last 40 years we got less and less...
In some cases you can get away with the longer minus (or positive) cable, effectively reducing the cabling length by 50% by using "skip or leapfrog wiring".
I had a look at what you mean. The disadvantage is that we would need much more extension cables between the panels because the initial cables only cover the distance to the next panel.
Looks pretty easy, comparing to do everything alone, welding a construction on the roof etc... The roll of cable was the heaviest to bring up the ladder...
But it is not really comparable, my first system ist just 9 Panels. Nevertheless they serve my complete consumption right now, the electricity meter is turned off and i am powered by my UPS system 🙂
I am curious what you get out of your system.
Cheers from Bulgaria.
I remember the weather in Bulgaria: It was sunnier than in Switzerland. So you are lucky...
With just a ladder: I can imagine how hard this was! We were very happy with the lift.
Estoy impaciente por conocer los resultados. Gran trabajo de equipo que permite ahorrar, proteger el medio ambiente y hacer buenas amistades con los vecinos. Todo muy positivo.👌
I agree. Follow up after my summer break.
very good work...thanx from Australia
Glad you liked it!
i'm looking forward to details on how the inverter/battery/panels are wired together and also how it is hooked up to the home/grid.
Will come…
Very interesting video, waiting for the next parts...
Glad you liked it!
I'm looking forward to your video on DIY fusion reactors... 😉
:-))
So cool! Great team!
Thanks!
Well done! 😀
Thank you!
thanks for the update!
You are welcome!
Nice video. E schöns Tägli.
Danke!
👍 Superb project!
Thank you!
Why did you keep the chimneys? We had exactly the same type and we just cut them down to half the height so that they would fit below the panels. They are even better protected from rain now. and we did not have to remove any panels because of them.
Interesting idea! Maybe I have to talk to a professional. They are filled with concrete :-(
One you recover from doing the roof work... how about a video about the other end of those wires... and what the regulatory hoops you have in CH? Great video!
I will cover the „basement“ after summer break…
Heh Staropramen :D 👍 Nice project ;) Good analysis and planning sometimes save you 30-45% of implementation time. Don't ask me how I know that :D
We all lern the hard way ;-)
Would also like to know more about the collective model that allowed all this. Thanks.
An Update will follow.
Definitely a lot of work 💪. I assume you will have to calculate rather low hourly rates for yourselves in the final bill 😉
Yes, we do calculate it as „saved fitness center bill“ ;-)