Eos Energy Partner Frontier Power USA to Fund 480 MWh Battery Portfolio Under 2 GWh Deal
Eos Energy Enterprises partner Frontier Power USA will fund 100% of equity and transaction costs for a 480 MWh Bimergen Energy storage portfolio, securing a 7.5% stake for Bimergen while Eos holds 92.5%. This marks the first deployment under a 2 GWh capacity reservation with Frontier Power.
1. Transaction Overview
Frontier Power USA will acquire a 480 MWh battery energy storage portfolio from Bimergen Energy, deploying Eos Energy’s Z3 long-duration systems under a preexisting 2 GWh capacity reservation agreement.
2. Funding and Ownership Structure
FPUSA will fund 100% of construction equity, pay a development fee to Bimergen and cover transaction expenses. FPUSA will hold a 92.5% ownership interest in the project companies, with Bimergen retaining 7.5% for development contributions.
3. Project Pipeline and Timeline
The portfolio includes three ERCOT-based projects—two Texas 10 installations and a 100 MW/400 MWh facility. Notices-to-proceed are expected to commence in mid-2026.
4. Strategic Implications
This initial deployment under the 2 GWh agreement advances Eos Energy’s long-duration storage scale-up, combining its durable technology stack with FPUSA’s insurance-backed financing framework provided by Ariel Green.