Thanks all for this very illuminating thread. Before our Oliver we had a class B with a second alternator, 300 watts of solar and 400 amp hours of lithium battery. Since we were driving nearly every day we never paid any attention to energy use. Th class b had a compressor frig that worked very well- we never thought about its energy consumption. This new 3 way has been a bit of a pain! It struggles to get and stay cold and has condensation issues. We have 340 watts of solar, and 390 amp hours of lithium in the Oliver and no battery charging when we drive. From everything I am reading, setting up the system to recharge with my tow vehicle (Ram 1500 etorque) would not help all that much (a topic for another thread). Regarding energy consumption/ replacement, All the figures people are quoting seem about right given our 2 weeks in the trailer post-pickup last February. If we stayed away from the big energy hogs (instant pot, induction cook top, etc) when boondocking we were gaining about 70 amp hours per day from solar and using about the same amount. That is in the winter sun in Florida. We do carry a 3400 watt dual fuel generator so we always have that back up. Sure wish Oliver had told be they had the 640 amp hour lithium’s on the horizon. I would have jumped on that. On the positive side, Lithionics is in Clearwater Florida about an hour from me. They may be willing to install the bigger lithium’s which seem to fit in the battery compartment of the Ollie. Yesterday, Oliver told me that wanted $12,000 to do the switch!!! Obviously they do not want to do the work.