retiredgeologist wrote:
With high output race car alternator you do not need to be worried about too much output from it because that is what it is designed for. Will not burn out. Cannot overcharge and harm batt bank because the BMS(Battery Management System) stopes the alt from overcharging of the battery bank. Simple. Gives you the fastest charge available. DC to DC is useless and just slows down your charging.
The BMS does protect the battery from over current and more. But that is not your case. Your batteries can be charged up to 400A and the alternator is 200A. And the engine etc need amps. Does your alternator limit the amps to 200A when the demand is higher? If not you may indeed end up on the side of the road.
