In this April 20, 2015 photo, David Cunningham shows a prototype Tesla battery system that powers his Foster City, Calif. home. Cunningham installed a Tesla battery late last year to pair with his solar panels as part of a pilot program run by the California Public Utilities Commission to test home battery performance.
In this April 20, 2015 photo, David Cunningham shows a prototype Tesla battery system that powers his Foster City, Calif. home. Cunningham installed a Tesla battery late last year to pair with his solar panels as part of a pilot program run by the California Public Utilities Commission to test home battery performance. Jeff Chiu AP
In this April 20, 2015 photo, David Cunningham shows a prototype Tesla battery system that powers his Foster City, Calif. home. Cunningham installed a Tesla battery late last year to pair with his solar panels as part of a pilot program run by the California Public Utilities Commission to test home battery performance. Jeff Chiu AP

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Battery-powered home: Tesla takes its technology to houses, businesses

April 30, 2015 7:52 PM

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