GridStor, a developer and operator of utility-scale battery energy storage projects, has acquired the 199 MW/796 MWh Birdseye battery storage project in Adams County, Colorado, from Accelergen.

The company said the acquisition is its fifth in the last 18 months and its second in the Western U.S. GridStor plans to construct additional standalone battery storage capacity in the region, where it said electricity demand is growing rapidly.

Once constructed, the Birdseye project is expected to provide power equivalent to serving more than 150,000 households during daily peak demand periods. GridStor did not disclose the financial terms of the transaction.

“We are actively expanding our portfolio by acquiring high-quality projects,” said Chris Taylor, CEO of GridStor. “One of our core strengths is efficiently transitioning projects from the development phase to operational status. We look forward to bringing more battery storage facilities online to support power system reliability for Western utilities.”

The project’s commercial operations date is planned for the end of 2028, with construction expected to begin as early as 2027. During construction, the project is expected to create an estimated 115 full-time jobs.

GridStor is backed by Goldman Sachs Asset Management. The company manages 530 MW and 1,300 MWh of battery energy storage assets in operation and construction. It also has a pipeline of more than 3 GW of battery storage projects in later-stage development across the western and central U.S.

In September 2025, the company announced the acquisition of the 100 MW/400 MWh White Tank battery storage project in Arizona from Strata Clean Energy, a vertically integrated solar and storage project developer. The project is expected to reach commercial operation in the first half of 2027.

A total of 7.2 GW of energy storage projects were acquired in Q1 2026, a 227% increase compared to the 2.2 GW in Q1 2025, according to Mercom’s recently released Q1 2026 Energy Storage Funding and M&A report. A growing share of acquisitions included standalone battery storage and hybrid solar-plus-storage projects.