Form Energy is a US company that develops multi-day grid energy storage. Founded in 2017 and based in Somerville, Massachusetts, its first commercial product is an iron-air battery designed to deliver electricity for 100 hours. It builds the batteries at Form Factory 1 in Weirton, West Virginia.
Form develops iron-air batteries that store electricity for up to 100 hours. That lets utilities cover multi-day gaps in wind and solar output, rather than the few hours lithium-ion typically covers.
Source: formenergy.com, en.wikipedia.org
Batteries are made at Form Factory 1, a high-volume plant in Weirton, West Virginia, which Form says employs more than 500 people.
Source: formenergy.com
Utilities and grid operators in the United States.
Source: en.wikipedia.org, formenergy.com
Form Energy was founded in 2017 and is privately held. It announced a $750M Series G financing in 2026.
Source: en.wikipedia.org, formenergy.com
We found no Form Energy entry in the Science Based Targets initiative dashboard (checked October 16, 2026).
Source: sciencebasedtargets.org
Form suits utilities and large energy buyers, including data center developers working with utilities, that want firm multi-day storage alongside renewables.
| Field | Value | Source |
|---|---|---|
| Headquarters | Somerville, Massachusetts, USA | PUBLIC SOURCE en.wikipedia.org |
| Founded | 2017 | PUBLIC SOURCE en.wikipedia.org |
| Ownership | Private (Series G $750M financing announced 2026) | COMPANY WEBSITE formenergy.com |
| Employees | 500+ at Form Factory 1 | COMPANY WEBSITE formenergy.com |
| Revenue (published) | No data | NO DATA |
| Operations and regions | United States | COMPANY WEBSITE formenergy.com |
| Customers and markets | Utilities and grid operators | PUBLIC SOURCE en.wikipedia.org |
| Facilities and capacity | Form Factory 1, Weirton, WV (high-volume battery manufacturing) | COMPANY WEBSITE formenergy.com |
| Technologies | Iron-air batteries, 100-hour duration | COMPANY WEBSITE formenergy.com |
| Certifications and standards | No data | NO DATA |
| Partners and named customers | No data | NO DATA |
Only what the company or an official register publishes. Targets and commitments are labelled as such. No data means we found no public figure, not that none exists.
| Field | Value | Source |
|---|---|---|
| PUE (published) | No data | NO DATA |
| WUE (published) | No data | NO DATA |
| Renewable energy share | No data | NO DATA |
| SBTi target status | Not found in SBTi export (checked 2026-10-16) | PUBLIC SOURCE sciencebasedtargets.org |
Research note: Own website blocked automated fetch; facts above come from public sources.
It is designed for 100 hours. (formenergy.com)
At Form Factory 1 in Weirton, West Virginia. (formenergy.com)
In Somerville, Massachusetts. (en.wikipedia.org)
Accessed Oct 24, 2026.
