Second Alternator Charging Lithium Battery Bank

john61ct

Adventurer
Agreed John. If you have a VR, you don't need the sterling device. Just have the VR cut the field wire on the alternator whenever you reach a cutoff. It shuts the alternator down fast enough to prevent blowing the alternator diodes.

Sent from my Pixel 5 using Tapatalk
Of course the specific wiring varies by alt type.

Note, I was not here talking about any killswitch idea

but the scenario where the big LFP House bank gets taken offline, isolated by other control circuits

while the alt is continuing to make power available to other perhaps now much smaller loads.

Having a lead batt hardwired to the alt output provides a buffering of the ensuing load dump, not just protecting alt / VR circuitry, but preventing spikes/surges in general.
 
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