Posted by ed3 on December 21, 2011 at 06:25:56 from (198.185.164.128):
In Reply to: AC from alternator posted by 550Doug on December 20, 2011 at 17:12:53:
A 60 alternator will put out just under 800 watts
A drill or saw use around 6 amps (HD ones more and LD ones possibly a little less - my number for amps is on the low side) at 120 v that equals just over 720 watts running - more on startup.
I guess anything will work for a short while.
Generally electric motors don't like being starved for voltage although some variable speed motors handle it better plus the fact that A/C electric motors in general don't react well to a different frequency.
The result more heat which equals a shorter life for both the generator and the tool.
An inverter would be better as it can draw additional power from the batteries making the drill run cooler at the right voltage and current flow - assuming a big enough inverter.
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