Hardly inside the TH when camping cause we are riding and hanging out 90% of the day. So I purchased Renovo 100W Panel and same brand controller along with a 900w converter. I only need it to keep 2 deep cell 12v charged and on occasion turn on TV or Laptop or cell phone charging station on if it gets windy or hot to be out. I figure I can add another panel if needed, but question is what do I program the controller to for maintaining the batts? Google says between 13.0 and 13.8 on float charging. But wont that slowly cook the batteries as I thought the batts ideal voltage is 12.8. I keep the TH at storage in Brawley during season so nice to know my batts will be full when I get there. TIA