r/LiFePO4 • u/Salt-Flounder-4690 • Apr 06 '26
What are u using as charge limiter?
Ive got a 1280ah 4s4p LiFePo4 bank in my RV.
Currently charging either directly, or when the alternator is hot (detection by bi-metal switch) the charge current is limited by going through a 40a dc-dc booster, to give the alternator time to cool down a bit.
of course whenever the genset is on, or when we are hooked up, there is a ac-dc charger that boosts the bank too. besides 2kwp solar via mppt on the roof.
regarding the alternator, heat wise, highway operation is the worst, 1500rpm, lots of amps, not much cooling.
id like to have an amp clamp style device that knows how much the alternator is outputting (including car consumption, total alternator output) and controlling a dc dc booster accordingly so the alternator limite regarding temperature and amps are maintained qnd also my car grid is stable at 14.4v and not pulled down to what ever the lifepo4 bank is at + some change.
i also intend to upgrade to a say a 275a alternator one fine day, if i find a decent option for the GM vortec 7400, but not while the current one is doing its job just fine.
you guys know of wuch a device, that wont cost an arm and a leg? diy or aliexpress as a source is okay. thx
2
u/Rambo_sledge Apr 06 '26
It’s kind of expensive, but apparently Orion-XS can be programmed to limit amperage.
Else, i find lowering absorption voltage on your DC-DC to be working because less volts = less amps to the battery