BFL13 wrote:
Not an issue with your batts (Li ?) If you have 60 cell panels instead of 72 there is a problem getting the voltage above 30v for 24v batteries. I ran an experiment with that and it stalled out just below 31v. I had the controller doing 24-24 on Flooded batts.
The pos wire from the breakaway switch to the 12v battery in the trailer is not supposed to have a fuse. Might need a way around that if using a buck converter for the 12v, not clear on the wiring for doing that.
You could make one pair of the 6 batts do 12v, and put the other 4 in series-parallel for 24v on the inverter. You need a separate charger for the 12v battery bank.
2oldman ran a 24v system for a while but changed up to a 48. He used a DC-DC converter for 12v things. Why go 24 at all when you can go 48 would be the question I suppose. Don't know how he ran his breakaway.
Thanks, the panels are 72 cell and in series, so no issue on voltage. Dedicating a pair on the batteries to 12v would seriously impair my inverter usage, I'm running a residential fridge off the batteries full time and they draw down ~ 6A/hr on it's own. Going to 48v would make sense if I added another pair, but I'm probably in my sweet spot for capacity right now.
