Top 5: Largest BESS Projects in the World in 2025

As large battery projects become more and more common across the world, a new initiative, BESS100 has emerged to track the largest among them all. The BESS100, an open source visual database of the 100 largest operational batteries in the world based on rated power i.e. MW, and not on installed or usable energy – MWh. BESS100 is an initiative by PowerSwitch and SunCast Media. As always, thanks to sketchy data, China based projects miss out, but it is worth mentioning that as on date, the World’s largest vanadium Redox flow battery project (175MW/700MWh)  and largest Sodium Ion BESS project 100MW/200MWh are in China. All the projects below are of course based on LFP batteries in most cases, Expect the list to change as more China data comes in, plus some of the much larger projects under construction currently.  

So, here’s a list of the top 5 largest BESS projects in the world based on their rated power as of now. 

#1 Edwards & Sanborn

Rated Power: 821 MW

Energy: 3280 MWh

Developed by Terra-Gen, the Edwards & Sanborn project is a combination of a solar and energy storage facility in southern Kern County, California, US. The facility integrates large-scale solar power generation with one of the largest battery storage capacities in the world. The project boasts a rated power of 821 MW and about 3.28 GWh of battery storage capacity.

Construction of the Edwards Sanborn project began in 2020, covering more than 4,600 acres. Initial phases came live in 2022 and 2023. The project started full commercial operations in January 2024.

The Edwards Sanborn facility supplies power to a diverse range of clients, including the city of San Jose, Southern California Edison, Pacific Gas & Electric, the Clean Power Alliance, and Starbucks. In 2024, the project received the US Presidential Federal Sustainability Award for its role in advancing carbon-free electricity.

#2 Blythe / McCoy / Arlington (BAM)

Rated Power: 812 MW

Energy: 3248 MWh

The Blythe/McCoy/Arlington battery energy storage project (often abbreviated as BAM) is a portfolio of large co-located battery systems at NextEra Energy’s solar power facilities in eastern Riverside County, California​. 

The combined battery installation has a rated power of 812 MW with a storage capacity of 3,248 MWh (4-hour duration), positioning it among the largest operational BESS projects in the United States and the world. These batteries are integrated with three adjacent solar photovoltaic complexes – the Blythe Solar Power Project, the McCoy Solar Energy Center, and the Arlington Solar Energy Center.

As of 2025, the entire Blythe/McCoy/Arlington storage portfolio is operational and providing resource adequacy and energy-shifting services to the CAISO grid. It is second to Edwards & Sanborn project by just 9 MW power rated capacity.

#3 Nova Power

Rated Power: 680 MW

Energy: 2720 MWh

Developed by Calpine, Nova power (also called Nova Power Bank) is one of the largest standalone battery storage facilities in the world. The Li-ion technology based five-phased project is rated for 680 MW/ 2720 MWh storage capacity,  capable of powering 680,000 homes for up to 4 hours.

The project area encompasses 43 acres with about 1,200 battery enclosures. The storage capacity at Nova powers Southern California Edison, Peninsula Clean Energy, and San Diego Gas & Electric. Constructed under a project labor agreement, Nova Power Bank is constructed by Mortenson and includes 1,200 battery containers supplied by BYD.

#4 Desert Sunlight

Rated Power: 530 MW

Energy: 2120 MWh

NextEra is one of the major developers of big BESS projects with 4 out of top 10 largest BESS in the world to its name. California-based Desert Sunlight is the fourth largest BESS in the world and second largest project by NextEra. 

The second phase of the project was operationalized a year ago which brought its total energy storage capacity of the project to 530 MW / 2120 MWh, bringing it among the 5 largest BESS projects in the world, and third from California, US. 

#5 Bisha

Rated Power: 500 MW

Energy: 2000 MWh

By the end of 2024, US dominated BESS listings with most of the largest facilities to its name. Saudi Arabia entered the list and got ranked among the top 5 largest BESS facilities in the world with its Bisha project, developed by Saudi Electric Company (SEC).

The facility features 122 prefabricated storage units, designed and supplied by China’s BYD. Chinese assisted the project – the EPC works were carried out by a consortium between State Grid Corporation of China and Riyadh-based developer Alfanar Projects. 

The project is among several large-scale battery storage initiatives being developed in Saudi Arabia. In an ongoing procurement, the Saudi Power Procurement Company (SPPC) is tendering four 500 MW / 2,000 MWh BESS projects.