Greenflash, a Houston-based energy infrastructure company focused on the acquisition, development, financing, ownership, and operation of grid-scale energy assets, announced the acquisition of the 200 MW/400 MWh Rock Rose stand-alone battery energy storage project. The project was acquired from Advanced Power, a renewable energy project developer that owns and operates solar and storage projects.
The project, located in Fort Bend County, Texas, is expected to receive Notice to Proceed in 2026 and commence commercial operations by mid-2027.
According to Greenflash, this project enhances its ERCOT portfolio, chosen for its strategic interconnection point, strong transmission access, and ability to bolster grid reliability through flexible dispatch.
This acquisition aligns with Greenflash’s broader strategy to expand utility-scale battery storage projects across the ERCOT region, advancing the company’s mission to strengthen Texas’s energy infrastructure and grid resilience.
“ERCOT, like other major power markets in the U.S., has an urgent need for projects that enhance grid reliability,” said Tom Spang, Advanced Power’s CEO. “As a premier developer of thermal, renewable, and now, BESS technology, Advanced Power is committed to bringing these contemporary power solutions to companies like Greenflash, who recognize the region’s urgent and growing energy and capacity needs. We look forward to their continuing success, as they advance Rock Rose through construction and long-term operations.”
According to Mercom’s 1H and Q2 2025 Funding and M&A Report for Energy Storage report, announced Energy Storage project financing increased 168% year-over-year in 2025.
In October, Varco Energy, a U.K.-based battery storage asset owner and operator, has announced the acquisition of the 100 MW Old Allen Road Battery Energy Storage System (BESS), also known as Bradford West 2, in West Yorkshire. The 100 MW grid-scale facility in West Yorkshire is designed to deliver essential flexibility and grid-balancing services to the U.K. electricity network.
