Dual alternator as a generator
On the EarthRoamer site they say; "We order Ford F-550 turbocharged diesel Power Stroke trucks with the dual alternator option which provides a quiet, fuel efficient, factory installed 3.7 kWh genera...
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A couple of other questionable things: automotive alternators rated at 160A will not produce that as soon as they get warm. And they will get VERY warm, since alternators are only around 60% efficient. Second, it would take a good quality AGM bank of maybe 800 AH to absorb 300 amps for very long. That's pretty big for even an Earthroamer. Since those are blank check vehicles, they really should be using LiFe batteries, if they have that charge capacity.
