Been a while, so reminder what that guy said:
"They sent a 60amp Lithium battery charger for generator/shore power and a Sterling power battery to battery DC charger for chassis battery/alternator charging while driving. It’s also a surge protector for overload surge back feed to alternator. Both designed for use with their battery. Put my trust in their knowledge and expertise and hoping for the best. So far so good ??"
It seems to be not just for ensuring the Li gets a good charge, but for if the regen high voltage spike triggers the BMS into shutting down the Li, making for a load dump on the alternator. Question is whether this would happen in a Class C with the House in parallel with the Engine Battery, or only with the House directly on the alternator, or not at all.
The DC-DC would be for all types of House battery including Li to get a good charge regardless of the alternator's voltage 12.x-15.x during regen or if the alternator voltage is always too high for the House battery.
(Si can stay undercharged too, but has no BMS. I chose to not have it in parallel with the Engine for other reasons, not to do with this regen voltage variation or whatever, so I do not have a stake in this aspect- If I had a new vehicle with regen and Li, I would be more than curious. )
