Mercedes-Benz maker Daimler is evidently planning for a future where luxury cars refuel in their own garages. The German automaker is announcing a partnership with Vivint, an American solar panel installer, to sell residential solar panels with modular, stationary storage batteries.

The venture is a product of Mercedes-Benz Energy, a new subsidiary created in 2016 to move into the residential energy storage market. The company builds 2.5kWh lithium-ion batteries in Germany, which can be interconnected to create a system as large as 20kWh.

Mandi West, a spokesperson for Vivint, said the price of the system would vary. “A fully installed 2.5kWh battery system, when paired with a solar energy system will cost about $5,000,” she said. But a 20kWh system will only cost about $13,000 fully installed. “Some installations may cost more or less depending on customer needs/special requests,” West added.