The use I am interested in is battery power plus solar for an RV. Not the drive train yet, since it seems battery technology is not yet there to both power the drive train and also key electrical accessories. Meaning able to run the AC overnight and a microwave for making hot drinks and a fridge freezer using stored solar power, with power left over for smaller power consumption uses. I envision a system with a rooftop solar collector or a unit that can be set up near the RV when boondocking or both plus able to plug in to charge. How close and how easy does this seem?