If you are thinking about a generator anyway, why not a 48V DC generator. It'll be more economical to run the motor off and you can use DC to DC converters for 12V DC navigation devices and a sine wave inverter for AC appliances and even sensitive electronics.
I don't have any experience with these, but have read about them.
One example is: http://www.amplepower.com/products/genie/index.html
There are DC generators designed just for the marine environment.
David
--- In electricboats@yahoogroups.com, "goldsmithfoil" <suntreader@...> wrote:
>
> Group,
>
> I'm setting up a MARS PMAC and Kelly KBL controller package for my Islander 32 (about 10k pounds or so.) It'll run off a set of 6V cart batteries.
>
> A couple of questions. Has anyone used a Kelly controller? I had planned on a Sevcon originally but the Kelly seems like a nice unit (and its probably half the cost once everything is wired up and running.)
>
> Second question: How can I go about bench testing the whole deal before installation and before setting up the battery array. This conversion is part of a larger restoration project and it'll be six months before the boat heads to the water, I wanted to buy the batteries at the last moment so they don't just sit for that long. I can buy a small 48v power supply, but how much amperage is needed to test the system out? No need for full throttle, just turn on and spin the prop some.
>
> Looking for power supplies got me thinking. Could you set up something like this:
>
> http://www.trcelectronics.com/Meanwell/se-600-48.shtml
>
> First for testing and then installed to power the motor off of a Honda 2000 generator? There would be enough power to run the motor off the power supply and charge the batteries off a separate charger. That could give some redundancy in case there is a problem with the batteries or their charger, and I'd need the supply for running on the bench anyway.
>
> Thanks,
> David
>
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