yes just a 400ah battery bank from Tess Electric. Heat pump only mode is very important for the water heater as if you just run off elements it would use 10x more energy. I average about 1-3kw a hour when home. Just make sure you get items like a refrigerator or tv that is energy star rated . To get the most out of your system. I try to run the washer/ dryer and dish washer around noonish peak solar time. I try not to run them on very cloudy days tho.
