I do not use my system 24/7. I turn it off when not in use, but it automatically starts charging when the sun comes out. However it starts too early and ends too late. Right now I'm at 27.7V and when I get home later it'll be like 26.5. It is just consuming itself... is there I way I can get it to stop charging at 27.7V??? If it's pulling less than what the unit takes then it's just uselessly running.