ESS Inc. was established in 2011 to develop and commercialize a low-cost, long-duration battery for commercial and utility-scale energy storage. Levering technical expertise in adjacent power generation disciplines, ESS has successfully developed and validated an All-Iron Redox Flow Battery for applications requiring 6+ hours of energy capacity and 20+ years of lifetime. By utilizing earth-abundant iron, salt and water for the electrolyte, the Iron Flow Battery will enable very low levelized cost of energy (LCOE) and much deeper penetration of renewable energy in the world's energy infrastructure.
| Date | Amount | Type | Investors | Valuation |
|---|---|---|---|---|
| 10/08/15 | $3,200,000 | Series A |
Element 8 Pangaea Ventures | undisclosed |
| 12/12/17 | $13,000,000 | Series B |
BASF Venture Capital Cycle Capital Management InfraPartners Management Pangaea Ventures Presidio Partners | undisclosed |
