Imergy Power Systems Introduces Grid-Scale ESP250 Series Flow Batteries

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A new ESP250 series of vanadium flow batteries has been introduced by advanced storage systems leader Imergy Power Systems. Its output capacity is 250 kilowatts (kW), with 1 megawatt-hour (MW) of energy storage capacity. Multiple batteries can be linked together to create one energy storage platform. When they are linked together, this platform can provide megawatts of power and megawatt-hours of energy. The ESP250 modules are about the size of two shipping containers. Energy output duration is up to 8 hours. You can read more details if you like on the ESP250 data sheet.


“With the introduction of the ESP250, Imergy has broadened its product portfolio to include a product for every major energy storage market segment and application. From demand response for individual buildings, to frequency regulation for the grid, Imergy has a product designed to meet the market’s growing demand for low-cost, high-performance energy storage,” explained Bill Watkins, CEO of Imergy Power Systems.

Both industrial and commercial customers can use these flow batteries for large-scale energy applications. Microgrid implementation, peaker plant replacement, transmission and distribution investment deferral, backup power system delivery, and renewables management are possible with these new batteries. So are peak shaving and frequency regulation.

In fact, Imergy is already collaborating on a California college campus microgrid project not far from the company’s Fremont headquarters, and it could become the blueprint for a number of other college microgrids.

Like other Imergy flow batteries, they also use vanadium from fly ash and mining slag. In other words, it is recycled material. The liquid electrolyte doesn’t degrade over time, so Imergy’s flow batteries could be used for 20 years or more. The components of an Imergy flow battery are non-toxic and non-flammable. This is obviously different from lithium batteries, which have shorter lifespans and can explode.

CleanTechnica has steadily reported about Imergy for some time because the company keeps finding ways to succeed. I imagine we’ll have another Imergy story up before too long.

Related: 42 Battery Storage Companies To Watch

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Jake Richardson

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