Lithium Batteries
Just downsized from a Class A DP to a Class B+. I got the residential fridge in the new motorhome so power when off the grid is going to be more of an issue that it was before. I’ve been looking at ...
Forum Discussion
pianotuna wrote:
I think the issue is over voltage to the LI battery bank, not protection of the alternator.
LI batteries have been known to burn up some alternators due to the high charging demand, they've also been known to draw down tow vehicle batteries due to the higher resting voltage of LiFePO4 vs LA, if left hooked up with the engine off with a constant hot charge wire.
There is no overvoltage worries due to the voltage drop on inadequate factory wiring for charging purposes. If you upgraded you wiring such that you could get higher than 14.6V at the batteries then the BMS would kick in on high voltage.
For MY application the DC charger is there to actually provide enough amps to charge the batteries while running and isolation from the TV when the engine is off.
DC chargers have many benefits and one is absolutely protecting the alternator -
https://www.victronenergy.com/blog/2019/10/07/careful-alternator-charging-lithium/
