Benchmark battery energy stationary storage database surpasses 10,000 projects

The battery energy stationary storage (BESS) market has grown significantly over the last five years, with this growth is set to continue. Benchmark’s BESS database has now surpassed 10,000 unique projects, both operating and in the pipeline.

This is nearly nine times the number of projects Benchmark tracked in the May 2022 edition of Benchmark's BESS database. The average size of the projects in the database has increased significantly, too, from 193MWh in 2022 to 316MWh today.

“BESS has matured at a dramatic pace over the last five years from a relatively niche technology to the go-to source of much needed flexibility on today's grids,” said Pete Tillotson, a BESS research analyst at Benchmark. “Technological innovation, falling battery costs, intense OEM competition for market share, and the increasing realisation of its multiple benefits and speed of deployment have all contributed to BESS becoming core grid infrastructure.”

What are the trends in the database?

Click through this interactive data story to reveal what sorts of projects make up the database and where they are.

How has the BESS market changed over the past five years?

The BESS market has grown significantly over the last five years, with a~15-times increase in annual grid-scale installations 2021 and 2025. The average size of the projects installed since 2021 has also been increasing. The average grid-scale project in 2025 was 261MWh compared to 68MWh in 2021.

This insight draws from Benchmark's granular BESS Service, consisting of detailed forecasts to 2040, system pricing, capacity growth trends and more. By bringing clarity to a rapidly accelerating market, this subscription facilitates smarter investment decisions, strategy planning and execution, and successful commercial outcomes. To learn more, submit your details below and our team will be in touch: