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The batteries are too expensive. Buying the batteries in the form of a tesla model 3 costs almost the same as just an equivalent kWh in powerwalls.
by bagels 3y ago
The batteries are too expensive. Buying the batteries in the form of a tesla model 3 costs almost the same as just an equivalent kWh in powerwalls.
- Heliosmaster 3y agoThat makes kinda sense, a Tesla is mostly batteries anyway. Jokes aside, how much batteries do you need? A Tesla Model 3 has 60kWh. That's a lot of battery. For my residential needs (I have solar panels) I would be looking at maybe 10kWh.
- ziga 3y agoLots of variables in sizing a battery system: - Is your goal battery backup or load shifting? - How much backup do you need? - What is your energy usage and peak demand during that time? Peak demand is a big factor: a single Tesla Powerwall 2 for example has 13.5 kWh of capacity but only 5kW of continuous power. A heat pump or AC can exceed that, which is why many people stack multiple batteries to be able to power their homes. (The new Powerwall 3 can supply more power.)
- cjdell 3y agoCan get close to $100/kWh if willing to DIY a LiFePO4 pack. Look for EVE cells. About a quarter the cost of a PowerWall.
- applied_heat 3y agoRIP your home insurance
- chris222 3y agoYou 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.
- timbit42 3y agoSodium-ion batteries will be a lot less expensive once production ramps up. The cost of sodium and aluminium is a lot less than the cost of lithium and copper.