Yeah, that doesn't seem very efficient. I see why this works at larger scales, such as water reservoirs and such, but there's no way this would be worth the cos

Yeah, that doesn't seem very efficient. I see why this works at larger scales, such as water reservoirs and such, but there's no way this would be worth the cost to install in one's backyard. Especially when the price of equivalent battery-backup systems are only a few thousand dollars.