Compare Equipment
Comparing 1 product
Form Energy
Iron-Air Battery SystemPre-commercial (pilot 2025)
Performance
Energy Capacity
150MWh
Power Output
1.5MW
Duration Options
100H
Round-Trip Efficiency
—
Cycle Life
6,000
Depth of Discharge
—
Chemistry
Iron-Air
Physical
Length
—
Width
—
Height
—
Weight
—
Cooling Type
Non required (ambient)
Grid Integration
Grid-Forming
—
DC Coupling
—
Software Platform
Formware (grid optimization)
Certifications
UL 1973
Unknown
UL 9540
Unknown
UL 9540A
Certified
IEC 62619
Unknown
Commercial
Warranty
25
Manufacturing Location
USA (Weirton, WV - Form Factory 1)
Key Differentiator
100-hour duration; iron/water/air chemistry; non-flammable; <1/10th cost of Li-ion per kWh; FEOC compliant; no thermal runaway risk; Made in USA
Data Quality
Data Confidence
Founded 2017. HQ: Somerville, MA. $800M+ total funding (GE Vernova, Breakthrough Energy, T. Rowe Price). Factory: 550K sq ft Weirton, WV (former Weirton Steel site). 300+ employees at factory. First pilot: 1.5MW/150MWh with Great River Energy, Cambridge MN (operational late 2025). Pipeline: 14 GWh. Upcoming: 10MW Xcel Energy (2026), 15MW Georgia Power (2026), 8,500MWh Lincoln ME (2027-28). DOE support. Reversible rusting process. Modules ~washer/dryer size, ~30 cells each, grouped in shipping container enclosures. >3 MW/acre at highest density. UL 9540A tested