Hi Bill,
Very impressive sounding conversion. The most useful information that you could provide (from my perspective) is a little more info about the boat, LWL, beam, and displacement. The real good info would be the "watts to knots" performance at a number of different speeds while motoring in calm conditions. If you can tell us how much energy (amps and voltage) that you use at 4, 5, and 6kts, it can confirm some of the predictive performance calculations for other potential electric conversions.
It would be interesting to know how far your 36kWh battery bank can drive your boat without firing up the generator. Perhaps the energy management computer makes your boat more like the hybrid cars on the road today, where electric only is a small part of total operations and the ICE fires itself up to support regular powering. In any case, I like to hear about this type of conversion because it is so different from most of the conversions in the group.
Thanks for sharing,
Eric
Marina del Rey, CA
PS. BTW, attached phots don't come through on this Yahoo group. You can post photos directly to the group by going here:
http://groups.yahoo.com/group/electricboats/photos/album/0/list
You can create a folder and add your pics in there.
--- In electricboats@yahoogroups.com, Bill Southworth <whs@...> wrote:
>
> I've included a couple pictures of the refit of my 57' sloop, the Barbara Ann, with 50kW continuous 100kW peak hybrid power. The installation includes a UQM HiTor propulsion motor with a 3:1 custom planetary gearbox, 24 Odyssey 2250 batteries with dissapative cell balancing and vacuum relays for each 48 volt group, ABB insulation resistance measurement, and multiple CAN bus electronic throttles. The whole system is managed by a CAN network connected to a small Debian Linux computer. The backup generator is a Westerbeke 34kW AC generator. The rectified generator voltage and current are controlled by the Linux machine by electronic control of the voltage regulator. High voltage inductive loads (generator and motor) are connected through a "soft start" circuit which brings the voltage on-line through a resistor before fully connecting the load.
>
> - Bill
>
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