I have a wishlist item for a modern LiFePO battery that I can use to upgrade my lead acid RV (house) batteries.
I've been looking around and several BMS's have a setting to protect and limit the charging current. I see yours does too. But, what I'd like is a way I can replace my house batteries in my RV without having to purchase a separate $200 DC-DC charger to go between my engine's alternator and the battery. As we all know, if I replace my lead acid battery directly, when I'm driving down the road, the new battery will almost certainly destroy my alternator because it can take a lot more power than the stock alternator can deliver. But wouldn't it be possible to have the BMS throttle down and limit the charge rate for me? I'm guessing that I could go into the BMS settings and lower it to, let's say, 30 amps and just install it. But then when my solar panels kick in they would be limited to just 350 watts or so of charge capacity until I raised the limit back to normal. It'd be wonderful if the BMS has two charge current settings and toggle,back and forth automatically based on a signal of some sort.
it would require some sort of signal to the BMS to let it know,the difference between incoming current from the alternator and incoming current from (for instance) my Solar panels. So, an additional dedicated I/O line or something might be required. But it shouldn't be very hard, no? And that way, as I'm driving to my favorite camp spot and have a few hundred amp hours out of my dinosaur juice burning engine to spare to could use them to help top off the house batteries.
The real goal, here is to eliminate that DC-DC charger and the extra connections, mounting and headache. Fewer things to go wrong, more reliable, and cleaner solution. Yes? No?
