With the capacity to store up to three-times more than Tesla’s PowerWall 2 home batteries, the Lavo Green Energy Storage System connects to your solar inverter & your water main, then electrolyzes the water to store the hydrogen—up to 40kW hours worth. That’s enough to power the average home for 2 full days. Technically, this is not a battery, rather it is a home electrolysis system & hydrogen storage array. Also, the world’s first.