ESS Inc. is a leading provider of long-duration (4+ hours) energy storage solutions for commercial, industrial, utility, microgrid, and off-grid applications. Their Energy Warehouse (EW) iron flow battery delivers up to 8 hours of continuous energy, has a 20+ year lifespan with no capacity loss, and is made from abundant, safe materials like iron, salt, and water. This solution offers the lowest levelized cost of storage (LCOS) per kWh.