Quote:
Originally Posted by oil pan 4
At idle and low RPM the alt might only produce 20 to 40 amps, anything after that will be drained off the battery. The 100 amp alt in my diesel only makes about 20 to 25 amps at idle.
Starting batteries don't like to do anyting besides starting the vehicle and get charged back up. Discharging them as little as 20% can damage them.
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Oh, I think I'll have to ditch the idea then. The cars they are fitted on come with 150A alternators and this is probably why.