Essinc
Founded 2011 Β· 308 employees on LinkedIn Β· 2 known investors
ESS Tech, Inc. builds iron flow battery systems for long-duration energy storage, offering up to 22 hours of storage to provide baseload power for grids, AI data centers, and communities. Its American-made systems are designed for a 25-year life with no capacity degradation.
Founders & leadership
Essinc was founded in 2011 by Craig Evans.
CE

Craig EvansinPresident & Founder2021β2023
Investors Β· 2
Non-dilutive funding Β· 4 SBIR/STTR awards
Federal grants β no equity taken| Agency | Phase | Year | Amount |
|---|---|---|---|
| U.S. Air ForceAir Force | Phase I | 2020 | $50K |
| ARPA-E | Phase II | 2015 | $1.1M |
| ARPA-E | Phase II | 2012 | $1.5M |
| ARPA-E | Phase I | 2012 | $225K |
Source: SBIR.gov award data (U.S. Small Business Administration). SBIR/STTR awards are competitive federal R&D grants and contracts β non-dilutive capital alongside any venture rounds above.
Frequently asked questions
- What does Essinc do?
- ESS Tech, Inc. builds iron flow battery systems for long-duration energy storage, offering up to 22 hours of storage to provide baseload power for grids, AI data centers, and communities. Its American-made systems are designed for a 25-year life with no capacity degradation.
- Who founded Essinc?
- Essinc was founded by Craig Evans in 2011.
- Who are Essinc's investors?
- Essinc's investors include Breakthrough Energy Ventures, Cycle Capital.
