This is my hand truck build, it's based on a 12 volt 300ah lithium battery,( I have capacity tested it it made 305ah ) Victron 100/50 controller and shunt, a 2500 watt inverter and a DC distribution box for usb and Anderson connection. All mounted on a sheet of 1/2 inch lexen.I can wheel it to wherever I need power and strap in down in the back of my van. It charges from solar a 450 watt residential panel on the roof. I do have a number of these solar panels I bought new of a solar installer so may add another one top that slides out if I have time! I am going away camping at the end of the month so this will power my fridges and everything else.