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As of yet there is nowhere in the world where the installed cost of a 50 kWh hour battery system is only $10,000. I don't think you can even get that much stora

As of yet there is nowhere in the world where the installed cost of a 50 kWh hour battery system is only $10,000. I don't think you can even get that much storage for that little money even if you're qualified to install it yourself and are just paying for the hardware. Are you perhaps just looking at wholesale cell costs?

Retric 9y ago
I don't think there is any reason for a home use to install a battery pack without solar power, and with solar power they already need an inverter. https://www.alibaba.com/product-detail/25kwh-48v-LiFePo4-battery_60733443508.html?spm=a2700.7724857.main07.24.35f42b36wSq2Da https://www.alibaba.com/product-detail/25kwh-48v-LiFePo4-bat... Now this is Alibaba so we are talking about dubious quality still it's showing 2,000$ for 25kwh battery pack when buying 2 or more. 50kwh is 2 so that's 4,000$. That's for Lithium iron phosphate battery which should give ~2,000 cycles though they say 3,500. PS: Grid scale you would want to install the batteries at the solar power plant so again no need for an extra inverter.
- jsight 9y ago
  <$100/kwh for LiFePo4? That seems really hard to believe.
- philipkglass 9y ago
  If that's not a scam or something that fails in 2 years, it's pretty amazing. At a lifetime of 3500 full-depth cycles it works out to a lifetime capital cost of only 2.2 cents per kWh. In sunny regions, with instantaneous solar generating costs already below 2.5 cents/kWh, it means that you can supply power around the clock at costs lower than fossil combustion. In a March 2018 report, BNEF put 2017 utility-scale battery costs at $209/kWh: https://about.bnef.com/blog/tumbling-costs-wind-solar-batteries-squeezing-fossil-fuels/ https://about.bnef.com/blog/tumbling-costs-wind-solar-batter... And that report was already taking into account global supply chains. That's why I am skeptical about the low Alibaba price. If EPCs can get reliable battery packs at $78/kWh (sans inverter) just by ordering from China, I would expect utility scale battery installation rates to soon go from "brisk" to "breakneck."

Retric 9y ago

I don't think there is any reason for a home use to install a battery pack without solar power, and with solar power they already need an inverter. https://www.alibaba.com/product-detail/25kwh-48v-LiFePo4-battery_60733443508.html?spm=a2700.7724857.main07.24.35f42b36wSq2Da https://www.alibaba.com/product-detail/25kwh-48v-LiFePo4-bat... Now this is Alibaba so we are talking about dubious quality still it's showing 2,000$ for 25kwh battery pack when buying 2 or more. 50kwh is 2 so that's 4,000$. That's for Lithium iron phosphate battery which should give ~2,000 cycles though they say 3,500. PS: Grid scale you would want to install the batteries at the solar power plant so again no need for an extra inverter.

jsight 9y ago
<$100/kwh for LiFePo4? That seems really hard to believe.
philipkglass 9y ago
If that's not a scam or something that fails in 2 years, it's pretty amazing. At a lifetime of 3500 full-depth cycles it works out to a lifetime capital cost of only 2.2 cents per kWh. In sunny regions, with instantaneous solar generating costs already below 2.5 cents/kWh, it means that you can supply power around the clock at costs lower than fossil combustion. In a March 2018 report, BNEF put 2017 utility-scale battery costs at $209/kWh: https://about.bnef.com/blog/tumbling-costs-wind-solar-batteries-squeezing-fossil-fuels/ https://about.bnef.com/blog/tumbling-costs-wind-solar-batter... And that report was already taking into account global supply chains. That's why I am skeptical about the low Alibaba price. If EPCs can get reliable battery packs at $78/kWh (sans inverter) just by ordering from China, I would expect utility scale battery installation rates to soon go from "brisk" to "breakneck."