By Kathie Zipp ViZn Energy Systems, provider of utility scale energy storage systems, is working to make the sun shine all night by integrating its zinc iron flow battery storage system for a record low price of 4¢/kWh. A ViZn 30 MW, 4-hour system added to a 100 MW solar plant can generate a 7% internal rate of return (IRR) with a 4¢/kWh power purchase agreement (PPA) – 20% below the lowest published values.
Now, utilities can add energy storage to a wind or solar farm at a lower price than coal-fired generation (6¢/kWh per Bloomberg New Energy Finance), paving a clear path toward
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