mbopp, I switched out all of my lighting inside with LED's last year so i know there will be significant power savings there. Our trip is planned for September 28th through October 2nd so running the furnace at night will likely be necessary. in 2015 we went camping over Columbus day weekend and it was in the 20's at night. I'm anticipating it being cold at night this coming year as well. So my power requirements will be likely be Furnace fan, Refrigerator fan, the LED lights, water pump, Slide out when arriving, Slide in when leaving, charging cell phones and I'm sure I'm forgetting about a couple of things too.