On 3 Jan 2007 21:09:59 -0800, "Mark" wrote:

Yea, 800 watts @ 12.5volts should be more like 65 amps

Don't forget that actual charging voltage is more like 14.2 volts
which equates to 568 watts with no adjustment for losses or power
factor.

Assuming 90% efficiency and 90% power factor (inductive load), you
would need something like 700+ watts from your generator.