June 2025 saw a total of 7.96GW/22.17GWh of grid-scale BESS enter commercial operations across 109 projects, with over half of that being in China, while the overall first half of the year saw substantial growth in deployments.
That’s the highest monthly figure in 2025 so far and a roughly 19% increase on the previous month’s figures, according to the latest data from market intelligence firm Rho Motion’s Battery Energy Stationary Storage Monthly Database.
Total deployed capacity for the first half of 2025 sits at 86.7GWh of battery energy storage system (BESS) capacity, a year-on-year increase of 54%, while the pipeline for the full year is currently just over 412GWh, the firm said.
China and Middle East account for 89% of figure
Some 4,343MW/11,193MWh came online in China over the course of June, accounting for 54% of the global figure. Three projects over 1GWh came online there, Rho Motion said. A notable project in China was the China Huadian Hami Tianshan Beilu New Energy Base Wind + Solar + Storage Project in Xinjiang. A combination of system integrators provided technology for it, including Hyperstrong, EAST, Sungrow, and the China Huadian Corporation.
Enjoy 12 months of exclusive analysis
- Regular insight and analysis of the industry’s biggest developments
- In-depth interviews with the industry’s leading figures
- Annual digital subscription to the PV Tech Power journal
- Discounts on Solar Media’s portfolio of events, in-person and virtual
Or continue reading this article for free
The Database also shows that Saudi Arabia accounted for 35% of the monthly deployments thanks to the three mega BESS projects totalling 7.8GWh of capacity in Najran, Asir and Jazan, provided by inverter and BESS firm Sungrow.
Note that no formal announcement has come from the main contractor for the project, Saudi engineering procurement and construction (EPC) firm Algihaz Holding. The company’s BESS projects manager Dr Ahmed Elbaz posted on LinkedIn in mid-June that the projects had “…reached completion and will soon deliver FFR, VAR, black-start and peak-shaving services to stabilize and green the Saudi grid”.
However, a source close to the project told Energy-Storage.news that the projects had not reached full commercial operation date (COD).
Oceania, which includes Australia, saw 436.8MW/878MWh come online in June. A big chunk of that will have been the first phase of the Western Downs Green power Hub BESS, totalling 270MW/540MWh utilising Tesla Megapacks, plus the Ulinda Park 150MW/300MWh BESS in the same region.
A total of 703.9MW/1,450MWh came online in North America in June, Rho Motion said. Energy-Storage.news reported on large-scale projects coming online in California, Idaho and Wisconsin which will together comprise a big chunk of that figure. AES completed construction on a 2,000MWh BESS, also in California, but this presumably was not included in Rho Motion’s deployment figures as it is not fully operational.
Future pipeline
Rho Motion added that five semi-solid state battery-based BESS projects progressed this month, all in China. Three entered EPC bidding, one entered construction and another entered commercial operations: the Power China Longquan Anrenzhen Changwen Energy Storage Project Phase II in Zhejiang came online at 100MW/200MWh. The other four are all over 800MWh and set to come online across 2026 and 2027.
Just over 59GWh entered the project pipeline in June 2025, up 226%. Taking the first half of the year as a whole, 343GWh has entered the global project pipeline, an increase of 62% compared to the same period in 2024.
