A Honda EM650 is rated to put out 550 watts continuously. Assuming 90% efficiency in the charger, you will get 495 watts of DC available. If you use it all for charging at 14.5 VDC, that means you will have a little over 30 amps available. That is plenty - and far more than you would get with the 8 amps directly out of the generator.
Bill
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