Yes, a 6k battery bank. I'm totally ignorant of this all. I don't know how much power I consumed with my generator, but at the 7, 000W running and 8,750W max output, it handled a lot of appliances: Well Pump, Lights, Plug outlets running coffee pot, water Kettle, Dish Satellite, TV, 2 Fish Tanks, Refrigerator, Whole House Water Filtration system, etc. So I assumed (my bad?) that I could use a portable solar system with a battery bank with at least 6k watts.