[Electric Boats] RE: lower voltage batteries

 

John,
This is Mike from Electric Yachts of Southern California.  You listed the benefits of electric conversion for you:
Easy of installation, this is with all the plug and play systems.
Weight, this varies according to the selection from about 55 pounds to about 200 pounds for the motor.  Battery packs with from 100 pounds (LiFePO4) to 250 pounds (AGM's)  - do not recommend flooded for your boat. I do not see needing 245AH 8D batteries (see projections).  You can push your boat with either a 36v or 48v system with ease.
Speed and Power (hull speed <6kts) (range 80% DOD)
  480w 3.1kts with 100AH AGM battery bank 24NM
  960w 3.9kts with 100AH AGM battery bank 14NM
1920w 4.9kts with 100AH AGM battery bank 8NM
2880w 5.7kts with 100AH AGM battery bank 6NM
A small portable generator will drive at over 3kts with the right charger
Easy of use, with a small boat like the Stone Horse the electric is simple, instant, less stress the boat, and more convenient to use.
I am not sure what is meant by the "split configuration".  Are you thinking of having the batteries pack built with a significant run between the batteries?  If so, that is not a good way to do it.  The batteries should be  only separated with modest cables lengths and the cable must be marine grade,well constructed, and aproperately sized. 

The big question is "Is it still an experiment".  Not really.  The issue is that the diesel became the defacto system in the 1970s and therefore still prevelant.  The same for the ICE in the car industry.  Today would you consider the hybrid to be "experimental" likely not.  Would you consider the all electric "experimental", maybe? It really is a feeling because as far as I know there are very few diesels the do not have electric starters (very dependable), electric fuel pumps, alternators, and electronic controls.  IMHO, for a small boat like yours the idea of the diesel noise, vibration, and fumes would keep me from enjoying the boat to its fullest.
Mike (somewhat biased)
Electric Yacht of Southern California

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