joshjhayes
New Member
Maybe I'm overthinking this. I have my travel trailer setup with a 24v lifepo4 battery bank connected to solar and inverter. I use a victron 75/15 as a dc dc converter to charge my single 12v SLA that runs the 12v system. My question is in an effort to maximize solar efficiency and limit the draw on the 24v system (at night), is there a way to setup the 75/15 so that it only begins charging when the 12v battery dips below, say, 12.5 volts? Would setting a very low float voltage accomplish this? I suppose I can limit the charging amps but that could allow the 12v battery voltage to dip too low causing damage if I'm running the RV furnace overnight.
Basically, I can envision a situation with my current settings where I wake up in the morning after a cold night (12v furnace drawing power) and my 12v battery is full but my 24v bank is empty and I can't make coffee. I'd rather have it setup somehow where the 12v battery is allowed to drain to ~75%
Basically, I can envision a situation with my current settings where I wake up in the morning after a cold night (12v furnace drawing power) and my 12v battery is full but my 24v bank is empty and I can't make coffee. I'd rather have it setup somehow where the 12v battery is allowed to drain to ~75%
