Originally Posted by delatbabel
I'm considering repowering with electric, if not in the immediate future then perhaps in 3-4 years time when my current engine reaches end of life (it's a 1991 model Vetus, based on a Peugeot, parts are also becoming hard to source).
My current engine is 52HP but I think I could probably get away with 40. I would probably keep the diesel fuel tank to run a genset for a hybrid solution, but I haven't decided on an electric engine yet. Mastervolt appear to have a solution in the 40HP range, does anyone have any experience with those?
...you are right. The power available (input/output ratio) on the prop of the electric engine can be 90% or even more - so it is much better than a Diesel engine that provides maybe 60% power on the prop. The rest is heat. Alot of heat. Therefore it is no problem to reduce the over all power!
We have been running our electric engine 10 hours or more at a time - and not just once to pass the 50nm long Kiel Canal - and the electric motor was only 'hand warm' and it has no external cooling.
Here in GER we just had a good overview on the actual electric engine systems on the market in a technical boating magazine at the end of last year. Unfortunately in German language and not online.
Give me some time to do a little excerpt on that - but that can't happen before beginning of February. This is not yet the first hand experience you asked for - electric engines or hybrid solutions are still very rare out there on the water.
@reefhunter - thank you for your pm! Here are some numbers of weight:
Original engine (Volvo MD2b 25hp 2zyl about 230 kg / 507 lbs
extra starter battery 30 kg / 66 lbs
total weigt for old system: about 260 Kg / 547 lbs
Electric engine 32 kg / 70 lbs
100ah GEL-Heavy duty batteries 30 kg / 66 lbs
6 of these 180 kg / 396 lbs
total weight electric engine and batteries: 212 Kg / 466 lbs
and not to forget the little new HONDA-Generator 12 Kg / 26 lbs.
After removing the old, rather heavy engine it was important to put back the same amount of weight at the same place not to spoil the over all trim. Therefor the new batteries had to sit there where the old engine was.