Robin D. Bussell wrote:
>          When considering a generators powered by internal combustion
> engines (probably diesel) are there any large efficiency differences
> in terms of fuel consumed per KWh output if the output voltage is
> mains voltage (240VAC in my case) or down in the 12VDC range?

Generators can be wound over a fairly wide range of voltage versus current
for a given power rating.  However, you're probably pushing the limit with
2KW and 12V since that requires 170 amps.  Now we're getting into copper
conductors with some serious diameter, which will force other tradeoffs in
the design that will likely compromise efficiency.  Look around at
commercial 2KW generators and see what voltage and current combinations they
tend to come in.  I'm guessing 2KW at 12V is going to be rare, probably with
good reasons.


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