A total of 49.4GW/136.5GWh of grid-scale BESS came online in the first nine months of the year, up 36% compared to the same period in 2024 (in gigawatt-hours).
That comes after 4,637MW/11,466MWh of grid-scale battery energy storage system (BESS) capacity was deployed in September, according to market intelligence firm Rho Motion’s Battery Energy Stationary Storage Monthly Database.
September’s figure is a 19% decrease year-on-year, which Rho Motion attributed to a slow month in China. The world’s largest market saw 1,726MW/4,519MWh put into commercial operations that month, its lowest monthly figure since April (this article is part of a monthly series).
China has contributed for half or more of global BESS deployments in 2025 every month, except September (39%) and April (41%). The remainder in September was deployed in Europe, North America and Oceania.
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Notable BESS projects in North America, Europe and Australia
In North America, 1,252MW/2,995MWh was recorded as coming online. In the US, these include a 150MW/300MWh project from Plus Power in Massachusetts, a 50MW/100MWh project from Eolian in Texas, and a 75MW/300MWh project from EDF in New Mexico.
Two totalling 170MW were commissioned in Ontario, Canada, by Capital Power.
The most notable amongst Europe’s 559MW/1,592MWh that came online was Fluence and DTEK’s 200MW portfolio in Ukraine.
A total of 1,020MW/2,040MWh was commissioned in Oceania including Tilt Renewables’ 100MW/200MWh Latrobe Valley project in Victoria, Australia.
In Asia, outside China, the Philippines’ first major solar and storage project came online, pairing a 197MWp solar PV array with a 320MWh BESS. The capital Manila was the site of last week’s Energy Storage Summit Asia 2025, put on by our publisher Solar Media, part of Informa.
In total, just over 71GWh entered the project pipeline in September, bringing the year-to-date (YTD) pipeline announced to just under 559GWh, a year-on-year increase of 26%.
Rho Motion also tracks technology types, and highlighted that notable sodium-ion projects came online from Peak Energy in the US and EnBW in Germany.
The market intelligence firm added that over 14GWh of BESS projects had technology providers assigned to projects and 13.4GWh entered construction, including five totalling over 1GWh. These include the:
- Thorpe Marsh BESS project in the UK
- Zhonghang Energy Storage Shanxi Yangquan Pingding County Shared Energy Storage Project in Shanxi, China
- Rondissone BESS in Turin, Italy
- Alcemi Coalburn Phase II BESS Project in South Lanarkshire, Scotland
This article is part of a monthly series for ESN Premium. See the previous ones here:
