Update: It looks like Tesla already has some customers for its stationary batteries, including Wal-Mart and Cargill according to a report from Bloomberg. That's only going to heighten interest in its plans ahead of its announcement.
Tesla Motors (TSLA) will reveal the details of the batteries for home and utilities it is building at its event on April 30 according to an email to investors found by Bloomberg. This basically confirms what people thought the event, announced by Tesla CEO Elon Musk last month, would be about. Musk ...
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