Wednesday, March 23

Tesla won’t be making 10kWh Powerwalls—it’s 7kWh batteries only, for now

(credit: Tesla, Green Mountain Power)

Tesla has decided that it won’t be making the 10kWh stationary storage batteries it unveiled last April, instead focusing exclusively on the 7kWh version.

The 10kWh version of Tesla’s Powerwall was made to be used as backup storage only—its nickel-cobalt chemistry limited the user to cycling the battery 500 times, so daily use was out of the question. The 7kWh battery, on the other hand, is made to integrate with solar panels, and due to its nickel-manganese chemistry, Tesla said it could be cycled 5,000 times.

After Tesla quietly removed the option for a 10kWh battery on its website, the company confirmed in an e-mail to Greentech Media that the larger version had been discontinued. "The Daily Powerwall supports daily use applications like solar self-consumption plus backup power applications, and can offer backup simply by modifying the way it is installed in a home," the e-mail read. "Due to the interest, we have decided to focus entirely on building and deploying the 7kWh Daily Powerwall at this time."

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