Itochu Begins to Sell Home Energy Storage Systems in Japan

Itochu Corp., a Japanese trading company, will begin sales of energy storage systems this month.

The product, with a capacity of 7 kilowatt hours, can store solar power generated from rooftop panels; it can also draw electricity from the grid at night, when power rates are cheaper, for use during daytime, Itochu said in a statement.

The device, to be sold for 2.4 million yen ($20,000), can store about 60 percent of the electricity an average household needs a day, according to the statement.

The system incorporates lithium-ion batteries made by Sony Corp., the Nikkei newspaper reported earlier today.

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