Re: [Electric Boats] Re: motoring with a battery charger (Rectified?)

A rectifier just changes ac to dc, doesn't appreciably change the
voltage (about a .7v drop across each diode). You would need to drop the
voltage with a transformer, then rectify it. That would make a very bad
charger, although an ok power supply for the motor. I prefer running my
motors off the batteries, and using a heavy charger to keep the
batteries up. Usually with solar and having a gen for backup or makeup.

Steve Spence
Renewable energy and self sufficiency
http://www.green-trust.org
http://arduinotronics.blogspot.com/

On 09/27/2010 06:33 AM, Steve Dolan wrote:
>
>
> I'm not sure if this is possible or even cheaper under the conditions
> you're all talking about but here is a question and maybe a suggestion.
>
>
>
> What about rectifying the voltage off the Generator to what ever you
> need. For the batteries and the motor(s). Let's say both the bank and
> the motors need 48V. The Genset would provide I believe (the Honda
> 2000?) around 24A? Sent to a common buss bar the batteries would be
> charged with anything the motor wasn't asked to use. The charger would
> be off line under this condition and as long as you didn't exceed the
> batteries maintenance charge input you could run it all day. On shore
> power the genset would be off. You could even wire the Genset to bypass
> the rectifier (a switch) to provide 120V.
>
> I'm just throwing out a suggestion or an idea and not sure of the
> numbers I have used but I would guess this would have to be simpler and
> have less voltage drop since it's only 1 piece of equipment and more or
> less a direct connection to the motors and batteries from the genset.
>
>
>
> Am I way off on this??
>
>
>
> Steve in Solomons MD
>
>

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