DIY Powerwall Builders Are Using Recycled Laptop Batteries to Power Their Homes

In May of 2015, Elon Musk unveiled Tesla’s Powerwall. The battery allows homeowners to store electricity, either from the grid or solar panels. The tech was alluring to those interested in alternative energy, but for many, the starting price of $3,000 was too steep. The battery could only store up to 10 kWh of electricity, or around a third of the amount the average American household consumes a day (the newer version can hold up to 14 kWh).

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