Published: 28 Apr 2021, 15:38 By: Editor ESS Inc launched its latest Energy Warehouse product, scalable in 75kW / 500kWh blocks, in February. Image: ESS Inc. ESS Inc, currently the only maker in the world of a commercially available flow battery using iron electrolytes, will deploy an energy storage system with more than six hours duration to a microgrid in Chile. The company’s flow battery will be integrated with renewable energy in the microgrid, to help a local utility reduce its reliance on diesel generators in the unspoiled Patagonia plateau which extends across southern Argentina into Chile. ESS Inc will install a 300kW / 2MWh version of its recently-launched Energy Warehouse battery energy storage system (BESS) for the utility, Edelaysen.