In an earnings call today, Tesla CEO Elon Musk said that in less than a week, the company's new line of stationary storage batteries had seen “staggering” demand, with over 38,000 consumer Powerwalls reserved and 2,800 power packs—arrays of batteries for businesses and utilities—reserved. “Response has been overwhelming,” Musk told an audience of journalists and investors. But Musk also admitted that he thought that ultimately, more of Tesla's sales would be to industry and utility customers, rather than to individual consumers.