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Grid storage

If they can achieve $400/kWh, 30-year lifetime, 95% efficiency = $0.04/kWh. There are places that you could make money with such a system buying power at night and selling during the day. Even if it costs more, there might be other compelling reasons to use this technology such as avoiding substation upgrades. They might compete with Na-S or V-flow batteries if they can get the price down.
 
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