Best Home Battery Storage Options: 2021 Guide
The Sonnen Eco Batterie, based in Germany, is a lithium ferrous phosphate battery; its smallest size starts at 4 kWh and costs $9,950—coming in at almost $2,500 per kWh. If you size it up to 10 kWh, the price tag is $16,750, which drops the per kWh price to $ 1,675 per kWh —still quite a premium over the competition.