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Can get close to $100/kWh if willing to DIY a LiFePO4 pack. Look for EVE cells. About a quarter the cost of a PowerWall.

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RIP your home insurance

You can take a Model 3 pack and make it a home battery. Technically the battery in a car will be exposed to way more danger. Yet they could sit right next to each other in a garage and insurance would freak out at the DIY home battery.

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