Tesla quietly built a virtual power plant in Japan

Tesla Powerwalls in Toronto | Andrew Francis Wallace / Toronto Star via Getty Images

Tesla's latest virtual power plant is in Japan. The company announced Friday that it has been quietly installing its Powerwall batteries at homes on the island Miyako-jima since 2021 and now has over 300 installed. It's the largest commercial virtual power plant in Japan, according to the statement.

Virtual power plants take advantage of solar panels and batteries in private homes. People with those setups can sign up to send extra power back to the electrical grid in their area, giving it an extra boost during situations when it's at risk of a blackout. The grid can use that power instead of pulling from the gas-fired power plants typically used when the power supply is strained.

The virtual power plant is based on a program at local...

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