HAWTHORNE, CA—In the sleek warehouse of Tesla’s Design Studio, CEO and co-founder Elon Musk announced the company’s latest products—a line of stationary batteries for households and utilities meant to store energy so that it can be used when energy is scarce and/or expensive.
The home stationary battery will be called the Powerwall and it will cost $3500 for a 10kWh unit. That unit is optimized to deal with serving a house if the traditional power grid goes down. A cheaper, $3000 version will have a 7kWh capacity, and it will be able to help a house with solar panels deal with the fluctuations in energy supply. The prices don't include installation, and Tesla said it would be working with certified installers including SolarCity and others.
In a Q&A before the event, Musk said that the batteries will be able to power houses in cold climates too—the batteries have an operating temperature range of -20C (-4F) to 43C (110F).
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