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Powerwall can level the load. And making Powerwalls can turn out rather cheap: electric car batteries degrade towards low energy/weight ratio, but it hardly ma

• hwillis 9y ago
  > electric car batteries degrade towards low energy/weight ratio And even then- barely. The Panasonic NCR18650B has a weight of 3.94 kg/kWh at the beginning of its life, and a weight of 4.92 kg/kWh after it's considered "dead". The average US household uses 30 kWh/day, which would require 117 kg of new batteries (in practice the pack will weigh double that) or an extra 29 kg if you use old batteries with 300k miles on them. That's an immaterial difference for almost any purpose. Used car batteries will be incredible. Salvaged Tesla modules are already starting to have impacts on hobbyists, but if used cells make it to market at even just a 25% discount it'll be incredibly awesome.