Fundraising Fox

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.

CECraig Evans
Craig EvansinPresident & Founder2021–2023

Investors Β· 2

Non-dilutive funding Β· 4 SBIR/STTR awards

Federal grants β€” no equity taken
AgencyPhaseYearAmount
U.S. Air ForceAir ForcePhase I2020$50K
ARPA-EPhase II2015$1.1M
ARPA-EPhase II2012$1.5M
ARPA-EPhase I2012$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.