OffgridMatty
I know enough to be dangerous!
I have a very small system in upstate NY that currently consists of three 375W solar panels (have a fourth but don't really need it), two 24v EG4 Lifepower batteries in parallel and a Growatt 24v 3000w inverter all in one. My cabin is off grid and is used on weekends year-round and occasionally for a week at a time in the summer. Winter was a challenge at times due to the limited sun and the fact that the system was off while I was away and freezing temperatures and charging LiFepo4 batteries doesn't mix. I still never ran out of usable battery power as I don't have running water in the winter months. I am now in the spring and summer months and my batteries are almost always within 75% to 100% charged. I have no option to share access power to a grid so it just seems like a waste. I really want to know what best practice is for battery longevity. I have thought about turning the PV off and letting the batteries discharge more while I'm at the cabin. Should I be concerned about keeping the high SOC for most of the summer. I needed the two batteries mostly to handle to well pump and small refrigerator start up. I'd love thoughts about what if anything I should do differently. Thanks!