Tesla Motors last night announced a new line of commercial and residential-grade batteries for storing electricity on site and to supplement power from the grid.

While the news was expected after Tesla CEO Elon Musk tweeted about the announcement last week, what did come as a surprise was the price: $3,500 for the new 10 kilowatt hour (kWh) Tesla Powerwall.

A smaller 7kWh Powerwall is also available for $3,000. The prices do not include an AC to DC power inverter and system installation.

powerwall front angle
Tesla

Tesla Energy’s new Powerwall home battery comes in 10kWh and 7kWh capacities and sells for $3,500 and $3,000, respectively.

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