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

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."