Largest BESS Projects in the World 2025: Powering the Future with Grid-Scale Battery Storage
As the world races toward a net-zero future, battery storage solutions have emerged as the backbone of the clean energy revolution. In 2025, Battery Energy Storage Systems (BESS) are not just supporting renewable energy—they’re transforming the way the world stores and distributes power. From California to China, several massive BESS projects are now online or under construction, offering an exciting glimpse into the future of energy resilience and grid scale battery storage.
In this blog, we explore the largest battery storage in the world, breaking down the top BESS projects in 2025 and how they are contributing to the global energy transition.
Why Battery Storage Matters More Than Ever
Before diving into the mega-projects, it’s important to understand why battery energy storage systems (BESS) are crucial:
- Balancing Supply and Demand: With intermittent sources like solar and wind, batteries stabilize power grids by storing excess energy for use when generation is low.
- Energy Resilience: During extreme weather or grid failures, BESS can provide backup power to critical infrastructure.
- Decarbonizing the Grid: Batteries help phase out fossil fuel-based peaker plants by replacing them with clean, dispatchable energy.
Now, let’s look at the largest battery storage in the world as of 2025.
1. Crimson Energy Storage Project, USA – 1,400 MWh
Located in California’s Riverside County, the Crimson Energy Storage Project is among the largest grid scale battery storage systems globally. Commissioned by Axium Infrastructure and managed by Recurrent Energy, this project is capable of storing 1,400 megawatt-hours (MWh) of electricity.
- Region: United States (California)
- Developer: Canadian Solar’s Recurrent Energy
- Status: Operational
- Capacity: 350 MW / 1,400 MWh
This project supports California’s ambitious clean energy goals and plays a key role in reducing reliance on gas-fired peaker plants.
2. Kapolei Energy Storage, Hawaii – 540 MWh
While Hawaii may be small in size, it’s a leader in clean energy innovation. The Kapolei Energy Storage (KES) project, developed by Plus Power, is a battery storage solution that aims to stabilize Oahu’s electric grid after the retirement of the AES coal plant.
- Region: United States (Hawaii)
- Developer: Plus Power
- Status: Operational
- Capacity: 185 MW / 540 MWh
KES also acts as a “virtual synchronous generator,” providing grid-forming capabilities for frequency and voltage regulation.
3. Futtsu BESS Project, Japan – 720 MWh (Under Construction)
Japan, facing both natural disaster risks and energy security concerns, is investing heavily in energy resilience. The Futtsu BESS Project, led by Tokyo Electric Power Company (TEPCO), will be one of Asia’s largest once completed.
- Region: Japan
- Developer: TEPCO Renewable Power
- Status: Under Construction (2025 completion)
- Capacity: 240 MW / 720 MWh
This BESS will support Japan’s plan to reduce carbon emissions and maintain grid stability amidst rising renewable energy adoption.
4. Chaozhou Battery Energy Storage Plant, China – 2,000 MWh
In 2025, China leads in deploying BESS technologies. One standout is the Chaozhou Battery Energy Storage Plant, with a whopping 2,000 MWh of capacity.
- Region: China (Guangdong Province)
- Developer: China Southern Power Grid
- Status: Operational
- Capacity: 500 MW / 2,000 MWh
This mega project supports solar and wind farms, showcasing China’s dominance in battery manufacturing and grid scale battery storage.
5. Victoria Big Battery, Australia – 450 MWh
Australia is another hotspot for renewable innovation. The Victoria Big Battery (VBB), developed by Neoen and powered by Tesla Megapacks, supports the Victorian grid and enables better utilization of interconnectors.
- Region: Australia (Victoria)
- Developer: Neoen
- Status: Operational
- Capacity: 300 MW / 450 MWh
VBB prevents blackouts and enhances energy resilience, providing quick-start capacity during grid stress events.
What Do These Projects Mean for the Global Energy Transition?
These mega-BESS projects are more than engineering marvels—they’re essential components of the global energy transition. Here’s how:
1. Decentralization of Energy
Instead of relying on large fossil-fuel-based plants, nations are turning to a network of renewable generation sites paired with battery storage solutions.
2. Accelerating Renewable Energy Adoption
Large-scale batteries enable grid operators to integrate more solar and wind without the risk of intermittency or blackout.
3. Enhancing Energy Resilience
From natural disasters to cyberattacks, BESS ensures that critical systems—like hospitals, water plants, and data centers—stay online.
4. Lowering Energy Costs
With peak shaving and time-shifting capabilities, battery storage helps reduce the need for expensive energy imports or generation during high-demand periods.
What Technologies Power the Largest BESS Projects?
Lithium-Ion Batteries
Still the dominant chemistry in 2025, lithium-ion offers high energy density and rapid deployment. Most of the largest systems use Tesla Megapacks or similar Li-ion configurations.
Flow Batteries
An emerging solution for long-duration storage, flow batteries like the vanadium-based systems in China offer a safer and more scalable alternative.
Hybrid Systems
Some BESS projects combine battery storage with hydrogen fuel cells or pumped hydro to provide multiple forms of energy flexibility.
Challenges Facing Grid Scale Battery Storage
Despite the rapid growth, challenges remain:
- Supply Chain Bottlenecks: Lithium, cobalt, and rare earth metals are in high demand.
- Recycling and Disposal: End-of-life battery management needs improved infrastructure and regulation.
- Safety Risks: Thermal runaway and fire hazards require advanced battery management systems.
What’s Next for BESS in 2025 and Beyond?
The future is bright. Here are some upcoming trends:
- AI-Driven Energy Management: Smart software will optimize when and how batteries charge/discharge.
- Community Storage Projects: Decentralized BESS for homes and communities will gain traction.
- Regulatory Support: Governments worldwide are rolling out incentives, subsidies, and frameworks to promote BESS deployment.
Conclusion
The largest battery storage in the world as of 2025 is helping redefine the future of energy. These battery storage solutions are at the heart of the global energy transition, enabling a cleaner, more reliable, and resilient power grid. Whether it’s Australia’s Waratah Super Battery or California’s Moss Landing, grid scale battery storage is no longer a futuristic concept—it’s the present reality, accelerating us toward a sustainable tomorrow.
As energy demand continues to rise and climate change accelerates, the importance of energy resilience through cutting-edge BESS projects will only grow. And the race to build bigger, smarter, and more efficient battery systems is just beginning.
FAQs
1. What is the largest battery storage in the world in 2025?
As of 2025, the Moss Landing Energy Storage Facility in California holds the title for the largest battery storage in the world with a capacity of 3,000 MWh. However, Australia’s Waratah Super Battery, expected to be completed later this year, will surpass many existing systems with 1,680 MWh of grid-connected storage.
2. Why is battery energy storage important for the energy sector?
Battery storage solutions help stabilize the power grid, reduce energy costs, and enhance energy resilience. They are vital for storing excess renewable energy like solar and wind and making it available when needed, supporting the global energy transition away from fossil fuels.
3. What does grid scale battery storage mean?
Grid scale battery storage refers to large battery systems connected directly to power grids. These systems store electricity during periods of low demand or high renewable output and discharge it during peak demand to maintain grid stability.
4. Which countries are leading in battery storage in 2025?
In 2025, the United States, China, and Australia are leading the way in deploying massive BESS projects. These nations are investing heavily in grid scale battery storage to meet renewable energy targets and strengthen energy resilience.
5. What types of batteries are used in large BESS projects?
Most large-scale systems use lithium-ion batteries due to their high energy density and efficiency. However, alternative technologies like vanadium redox flow batteries are also being explored for their long-duration capabilities and scalability.
