RBP#6: 1000 Watt Electric Outboard Engine for $350
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- Опубликовано: 8 сен 2024
- I´ve bought a cheap electric outboard engine on aliexpress and testet it on a lake. As a power source i used a custom made 48V battery setup and as a proof-of-concept a 60V battery build out of 3 pcs power tool batterys.
9:40 This controller is designed for 48v lithium- the problem is your voltage sag from cells not designed to handle the heavy amp draw. I've been through many iterations of making battery packs only to find one common denominator- you have to spend 3x the money on top shelf cells if you want any reliable performance above 500w.
Hey Robert thanks for a great video I learned something and was entertained by your family outing!
Hey Bob, i am glad you liked the video. Thanks Robert
Cute family interesting video
Very nice, thank you so much for the review!
Robert, thanks for the review. Would you mind posting the seller on Aliexpress where you bought it?
For that price you can buy a Minn Kota 35lb thrust motor and a decent compact deep cycle battery
I am really surprised how quite it was compared to others I have heard.
It's a little bit more noisy then let's say a torquedo - the engine is on top and there are gears. But the price is much less. And it is still less noisy then the best 4-stroke.
try kelly controller. it might gives you some ideas to change your tiki to full electric as well.
Hey, would you build one of those 48 Volt set ups for me if I paid you? You are amazing!!!!
Hi Robert! Great video! You are obviously an electrical pro, unlike me! I recently purchased a used Hangkai 5hp electric outboard motor and I’m having an odd problem. The twist throttle seems to only go full power and when I release it it goes into reverse (full power also). Also, the forward and reverse buttons on the throttle don’t seem to work. I’m wondering if you might have an idea about what might be causing the issue? Thanks!!
@Matt Fowler did you fix this?
@@dfgdfg_ no I ordered another one and it works perfect. I’m using 4 12 V deep cell marine RV batteries to make a 48 V bank for it and I can run my Jon boat all day with it
GREAT!, can you explain more of how you made that second battery? How many volts and AH in each battery? And they are in series?
Thanks!! Great video
I used three 18V/5Ah battery packs and connected them in series. The voltage of a fully charged LiPo battery pack is slightly higher then the nominal 18V - somewhere around 20 Volt. So three packs in series will give you the 60 point something you have seen on the display. Once you run the engine the voltage will soon drop to around 54 Volt and stay there for a while until the pack is depleted.
I used this battery instalment just as a "proof of principle". This three packs hold 270 Wh of energy. It means you can run the engine full speed for 10 Minutes. But i would not recommend to do this for two reasons:
1. You run the engine outside of the designed specifications. Increasing the Voltage means also increasing the current; the engine produces more power: At 48 Volt it draws 20 A and therefore you get 960 Watt output. But if you increase the voltage to 60 the engine will draw 25 A and deliver 1500 Watt. Usually this electric motors and motor controllers can handle this for a short period of time - a few minutes. But then they will get to hot, give you a nice smoke signal and say good by. As long as you use only - lets say - half throttle you should be fine.
2. Drawing 25 A out of this small battery packs means you almost short cut them - and this will not help them getting old. So consider to use 6 battery packs: Connect 2 packs parallel and 3 of this packs in series.
Regardless of this considerations be aware that it is only safe to work with a voltage of up to 45 V. Anything above is dangerous! If you are not familiar with this stuff ask a friend who is a electrician to check your installation before you insert the battery!
I hope this helps.
All the best - Robert
They have 48v ebike batteries that seem like a viable option.
Is there a gearbox at the base of the Motor shaft? I imagine having the motor at the top of the shaft and facing downward would require some gearing to get the propeller to turn.
Yes there is a gear, and yes the Motor in a Pod would be more efficient. But compared with the well known brands this Motor is much cheaper. And you could use batteries you already own. If you like to play with stuff like this its a good choice. If you want a perfectly working system buy the expensive one.
Hangkai just used a existing shaft and put an electric motor on top. A cheap controller and here you go. Not super efficient but very economic.
Nice motor, did you do anything special for customs clearance? Germany is a pain in the butt with customs.
No, i just had to pay the import tax, wasv all done by the shipment company.
did you make more videos on the boat ?
Yes, coming soon...
Hello, awesome video! I would love to buy the batter pack kit you made. Do you have a list of parts and where you got them so I could build one too?
Hey, i built this pack, because i already had the batteries from another project. Next time i would use something like this: de.aliexpress.com/item/1005003749363186.html?spm=a2g0o.search0304.0.0.4e4d6010ZbshJI&algo_pvid=d5d06ca5-62e7-4a76-84ee-a2b1bcec462c&algo_exp_id=d5d06ca5-62e7-4a76-84ee-a2b1bcec462c-16
60v will not damage the 48v motor?? Please explain
Well it will kill the motor - if you use it for a long time.
When you use the motor at this higher voltage it will draw a lot more power. Thus the coils will get too hot, the insulation will melt and the engine is dead. But for a short time it will tolerate this.
When cruising in the dingy, the engine will draw 150 or 200 Watt - the motor controller reduces the energy flow to the engine, so when cruising at 200 Watt the engine does not care if the battery has 48 or 60 Volt.
If you use full speed, the picture is different. Some quick calculations:
If you demand 1000 Watt at 48 Volt the engine will draw aprox 21 Amps (1000 W / 48 V = 20,8 A) hence the resistance of the Motor coils must be somewhere at 2,28 Ohm
With this 2,28 Ohm: 60 V / 2,28 Ohm = 26 A ==> 60 V x 26 A = 1560 Watt
(In reality the Voltages are higher in the beginning, since to Voltage of fully charged batteries is higher - both lead-acid and LiPo)
So the motor draws 50% more energy and you really fell this in a increase of thrust the engine delivers. Some of this extra power is also converted into heat inside the motor - and as long as the temperature inside the motor is not exceeding the limits, the engine is totally fine with it. How long it will take until the engine overheats - i don't know because i don´t have the full specs of the engine and therefor could not do the math.
For me this was more a "proof of concept" - could i use the tool batteries I a already own to run the engine? When operating the dingy I don´t use full trust anyway because it drastically reduces the distance I can travel; and using this small batteries at full trust i.e. 1500 Watt will deplete the batteries quickly - so the voltage drops, the ampere drops, the power drops, less heat in the engine.
But i would not connect the engine to a big 60 Volt battery bank and run the engine for hours at full speed.
@@robertgrafl nice thanks for explaining. Im considering the Hangkai 48v 8 HP motor for my inflatable raft, hopefully its fast and fun!
@@robertgrafl do you think the electric motor in these could easily be upgraded to a 3000w motor or higher? I want big power haha
as long as it fits the shaft assembly it should not be a problem. Of course you have to change the controller too. I think the shaft is used by Hangkai up to 6 HP 4 Stroke - so it should be able to handle the power :-)
In terms of buying a controller how would go about finding a suitable one? What does it need etc
Wonderful battery. How much?
I bought the LiPo Cells two years ago for 80 € each. I used 3 cells so 240€ plus 20 Euro for the BMS and another 20 or 30 for the case. But now you can get LiFePo Packs with 48 Volt and 10 or 14 Ah for less the 150 Euro, so i would now use one of those.
How fast does this kill a battery?
I have a 10 horse motor having a problem hooking up what kind of batteries to use could you help me thank you
my name is Ron it's a 10 horse electric 24v slash 48 / 60 volt thank you
Hi Ron, sorry for the late replay. Did you figure it out?
Did you finish your boat?
I am investigating all that is needed to run that same motor but only with 1,200 watt motor (5HP). I was going to use wheel chair batteries. The are little 12v 18ah sealed lead acid batteries. Like Universal Battery model UB1280. So it would be 4 batteries to give me 48 volts. I am concerned that I don't know enough yet and may not have enough runtime. I am estimating it would give me 45 minutes to a couple hours if I am conservative. What do you think? Are those batteries going be a good choice? Thanks
Hey, if you can get this batteries very cheep or free its ok. But they are heavy and won´t last long. Better get a 48V liion on aliexpress....
were can i get battey for motor i see ali express has ebikes 48v50amp 30 to 50 amp bms and can handle current i just ordered i havent got yet didnt order battery yet
What that engine
Where are all your life jackets .
Your kidding us right? We have so many lakes in Austria .... and people can swim like fishes ... lol
mal davon abgesehen das dein English echt im Ohr wehtut , ist der motor aber irre LAUT für einen Elektromotor , gibt es schon erfahrungen damit ? hat er eine Saison überstanden oder hat er aufgegeben ?