A manufacturing unit in San Jose, California, is already working at full capacity in response to an initial demand of 1,000 units of Sonnen's sonnenBatterie plug-and-play storage systems.

"In the United States there is enormous potential for battery storage, and the market is in its infancy. We're entering this market at a very early stage, before most of the other competitors," says Philipp Schröder, chief marketing & sales officer at Sonnen.