Bimergen Energy Corporation and Eos Energy Enterprises announced a joint development agreement on November 12 2025 that will pair Bimergen’s project‑development and asset‑ownership capabilities with Eos’s Z3 zinc‑based long‑duration battery technology. The partnership is designed to accelerate the financial close of Bimergen’s battery‑storage pipeline and to bring the two companies’ complementary strengths to a growing U.S. market that is demanding domestic, safe, and cost‑effective storage solutions.
Under the agreement, the two firms will collaborate on design, procurement, and financing for a portfolio that currently spans nearly 8 GWh across the ERCOT, MISO, WECC, and PJM markets. The initial focus is on several late‑stage ERCOT projects totaling 1.0 GWh, a region that has seen a rapid expansion of battery storage to support Texas’s high renewable penetration. Bimergen’s expertise in project development and independent power provision will be leveraged to move these projects toward financial close, while Eos will supply the Z3 technology that can deliver 24‑hour or longer storage at a lower cost than conventional lithium‑ion systems.
Bimergen has already secured $250 million in project‑level capital commitments, including a $200 million equity commitment, and the JDA will provide additional support to raise further development capital. The capital structure gives Bimergen the financial backing needed to scale its pipeline and to meet the capital intensity of large‑scale battery projects, while Eos gains a proven development partner that can accelerate the deployment of its technology in high‑growth markets.
Eos Energy’s recent quarterly results provide context for the partnership. In Q3 2025 the company reported record revenue of $30.51 million but a widened net loss of $641.39 million, largely driven by non‑cash fair‑value adjustments. Despite the loss, Eos maintained a $644.4 million order backlog and a commercial opportunity pipeline of $22.6 billion, underscoring the long‑term demand for its technology. The partnership allows Eos to monetize its technology through Bimergen’s development pipeline while Bimergen benefits from Eos’s domestic manufacturing and cost‑reduction gains at its Turtle Creek facility.
The agreement comes at a time when the ERCOT market is experiencing rapid battery growth—over 1,000 planned projects with a total planned capacity of 168,570 MW—and when long‑duration storage is becoming a critical component of grid reliability. Bimergen’s strategy of securing project‑level financing and partnering with technology innovators aligns with the market’s shift toward domestic, long‑duration solutions. Eos’s focus on automation and cost reduction positions it to deliver competitive pricing, while Bimergen’s project‑development track record ensures that the technology can be deployed efficiently.
"This agreement marks an important milestone for Bimergen," said Co‑CEO Cole Johnson. "Partnering with Eos and its made‑in‑America technology strengthens our ability to deliver reliable, long‑duration storage solutions and positions us to bring projects to market quickly and efficiently." "Long‑duration storage is critical to ensuring energy security and grid reliability," added Nathan Kroeker, Chief Commercial Officer of Eos. "Together, we are committed to meeting the growing need for viable, domestic energy solutions."
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