[andrewoliv]

I am considering re-powering my boat (Mariner 28). The option of converting to an electric drive (Elco) is very appealing. However, I would like to hear from anyone who has an electric drive on their boat. Pro's and Con's.

I am concerned about power into a strong headwind or current. How well does solar or wind re-charge the batteries. Length of time is also a factor.

I cruise the Chesapeake so don't plan to run the motor for 8-10 hours straight. But what is a realistic length of time to run the motor at a comfortable cruising speed? 5-6 knots on a boat that displaces 7500 lbs?

Any opinion welcome

 

[andrewoliv]

I have to re-power now. I am replacing a Yanmar 2QM15 with a 2YM15. Looking at the electric drive as an alternative.

I agree. From what I have read so far I am suspect of the electric drive. I am hoping to hear from someone who actually has one and get some "real-world" feedback.

The specs on line in the brochure are most likely based on perfect conditions. So I tend to adjust the specs published downward. (reduce the time and speed).

I do not take the solar or wind re-charging seriously, but I cruise on the Chesapeake where shore power is readily available.

 

[andrewoliv]

you might google - Nigel Calder, as he has been tasked with designing and implementing a true electrical propulsion system and documenting the advantage or disadvantage. A year back, electric was not there yet, in any commercially viable way and I think that is still the case. This was with the best and most advanced technology money could buy. As the Elco drive is "old technology"...

He is a genious, IMHO, and has the skills and credentials to do this.

I think that given the weight, cost and installation issues that you will encounter in bringing this to your Mariner....it will be a no-brainer to NOT do it. It is not a trivial task, and few yards or techs are on the Bay that know anything at all about to help you.

That being said, if I had the money to test this, I would be all over it, just to see for my self how it plays or doesn't. I would contact Stevens Institute (or other engineering college) and hire two or three interns with an interest to help.

Keep us posted as to what you learn.

Very good information. Thanks!