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You did right here:

Lets see...
50,000w / 12 vdc = 447 Amps
447A / 60% efficiency = 745A round to 750 amps

Guess about 100 amps to run whatever else you might need in that vehicle so 850 amps. Tack on another 100 amps just for the 'grins' and you have a draw of about950 amps.

Snipped.

[QUOTE="HiDef, post: 134581, member: 7734"] You did right here: Lets see... 50,000w / 12 vdc = 447 Amps 447A / 60% efficiency = 745A round to 750 amps Guess about 100 amps to run whatever else you might need in that vehicle so 850 amps. Tack on another 100 amps just for the 'grins' and you have a draw of about950 amps. Snipped. [/QUOTE]

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