Pulled my 5th wheel out of the shed today to clean it up so we can go camping. It had not been out for over a 1-1/2 years. All my LiFePo4 batteries were at 50%, just were they were when I shut them. Got all the solar turned on and charging like a champ. I have 1000 watts of panels and with the panels so dirty it still put out 735 watts. I love solar for bonodocking. With 1120 aH of battery and 1000 watts of solar we never have to worry. I do think I'm going to swap out to 435 watt panels just for a little extra power.