As it starts an expansion of a just completed long-duration battery storage system factory in West Virginia to double production space to nearly 1 million sq ft and boost annual manufacturing capacity to 500 MW at minimum—and get several proposed U.S. commercial scale installations under way—startup Form Energy has gained $405 million in new funding from some high-profile backers.
The Massachusetts-based firm’s iron-air technology is for limited, but key, application in enabling continuous clean-energy discharge to the grid for 100 hours at one-tenth the cost of lithium-ion batteries, it said. Form Energy’s system intakes oxygen to convert iron to rust, then changes rust back into iron in exhaling the oxygen—discharging and charging the battery in the process.
“When a building rusts or a bridge rusts, it is very slowly discharging [energy],” Form Energy CEO and co-founder Mateo Jaramillo told Newsweek Oct. 18 in announcing the funding. “What we have done is build a device that takes that reaction and
harnesses it and lets us manufacture that battery and deploy it in very
large volumes,”
The firm’s iron-air process will enable it to spend less than $6 per kilowatt-hour of storage on materials for each battery cell, with full battery system cost of less than $20 per kilowatt-hour—a figure at which researchers believe renewable energy plus storage could fully replace traditional fossil-fuel power, Form Energy told the Wall Street Journal.
The latest funding round elevates the startup’s total raised to date to more than $1.2 billion and includes as new investors T. Rowe Price, the asset management firm and manufacturer GE Vernova. Existing investors include the Bill Gates-led Breakthrough Energy Ventures, MIT’s The Engine Ventures, Energy Impact Partners and several others, Form Energy said.
GE Vernova also agreed separately with the firm to “strategically collaborate on areas to support the rampup of manufacturing operations and commercial deployments of our iron-air battery systems,” including engineering, supply chain operations, financing, sourcing and research, said Catherine Cral, a Form Energy spokesperson.
The first-phase plant involved a building team of design firm Stantec, she said. Also involved as foundation contractor has been Nicholson Construction, the North American unit of French-based Soletanch Bachy, according to a web post. The new factory is on the site of a former steel mill built in the early 1900s, “with known obstructions of remnant buildings, basements, slag deposits and many other steel, wood, and brick fragments,” Soletanch Bachy said.
The new funding “will enable us to get to full commercial production,” said board member Gabriel Kra, co-founder and managing director of firm investor Prelude Ventures. The Form Energy system “is the least-cost way to meet energy and capacity requirements as demand increases,” he said.
The round was also one of the largest for a clean technology firm—with sector underwriting slowed this year due to still stubborn inflation, high interest rates, geopolitical tension and the rise of artificial intelligence vendors as investment targets, said market monitor Pitchbook.
The Form Energy production plant also gained a $150-million U.S. Department of Energy funding award on Sept 23, supported by the Infrastructure Investment and Jobs Act, and a previous $215-million forgivable loan from the West Virginia Economic Development Authority.
‘Ready for Serial Production’
The company said it has more than 13 gigawatt-hours of battery installation projects that will come on line in 2025 and 2026—ranging from 100-MW-hour duration to 8,500 MW-hours.
“After seven years of dedicated R&D, product engineering, testing and validation, and most recently trial production, our 100-hour iron-air battery system is ready for serial production and commercial deployment,” Jaramillo said in a press release.
The company plans to install the 8,500 MW-hour battery system at a former paper and pulp mill in Lincoln, Maine, which it said would be more than at any existing global location and its first done without contracting with a utility customer. “This is a very natural next step in terms of scaling up,” Jaramillo told media. The total project costs was undisclosed, but includes a $147 million U.S. Energy Dept grant awarded in August.
Also in August, Minnesota-based Great River Energy named Mortenson Construction as EPC contractor to start construction of the 1.5-MW grid-connected Cambridge Energy Storage Project in Cambridge, Minn., a Form Energy system that is set to operate by the end of 2025, Cral said.
Form Energy has not announced contractors for its two 10-MW Excel Energy projects or for its 15 MW project with Georgia Power—set for deployment in 2025 and 2026 respectively. The firm’s storage technology has also been proposed for a 1-GW system in Ireland, in what is described in media as Europe’s first large-scale iron-air project.
Energy sector research firm Wood Mackenzie and trade group American Clean Power Association said in a recent report that the U.S. is on track to deploy about 12.7 GW of storage capacity in 2024.