IEA Reports Record 108 GW Of Global Battery Storage Additions In 2025

Battery energy storage is rapidly becoming one of the most important technologies supporting the global energy transition. Driven by declining costs, increasing deployment of renewable energy, and growing demand for grid flexibility, batteries are evolving from a niche technology into a core component of modern electricity systems. Today, they perform multiple functions simultaneously, helping balance electricity supply and demand, integrate renewable energy, manage grid congestion, and improve overall system reliability.

According to the latest industry data, global battery storage deployment continued its remarkable growth trajectory in 2025. Total installed battery storage capacity additions reached 108 gigawatts (GW), representing an increase of approximately 40 percent compared with 2024. This level of annual growth surpassed the historical peak for gas-fired power capacity additions, which reached around 107 GW in 2002, highlighting the increasingly significant role batteries are playing in global energy infrastructure.

Utility-scale battery storage remained the dominant segment of the market, accounting for approximately 87 GW of new capacity additions, or around 80 percent of total deployments worldwide. At the same time, behind-the-meter battery systems installed in homes, businesses, and industrial facilities also experienced strong growth, particularly in regions where electricity prices remain high and supportive policies encourage energy storage adoption.

While battery deployment continues to be led by established markets, 2025 also demonstrated a significant broadening of global adoption. Countries that were previously considered emerging battery markets recorded substantial growth, underscoring the expanding role of storage technologies in power systems around the world.Australia emerged as one of the fastest-growing battery storage markets globally.

Total battery installations in the country surged to nearly 8 GW during 2025, almost nine times higher than the previous year. Utility-scale battery projects increased from less than 1 GW in 2024 to approximately 4.2 GW in 2025, while behind-the-meter installations expanded dramatically from around 0.2 GW to roughly 3.4 GW. This growth was supported by a combination of federal and state-level incentives designed to accelerate energy storage adoption and strengthen grid reliability.The Middle East also recorded significant progress.

Battery storage additions exceeded 3 GW during 2025, more than tripling the level recorded in the previous year. Much of this growth was concentrated in Saudi Arabia, where battery storage is becoming a key component of the country’s expanding renewable energy strategy. As large-scale solar and renewable energy projects continue to enter operation, battery systems are increasingly being deployed to provide flexibility and support grid stability.In South America, Chile continued to strengthen its position as a leading battery storage market.

Capacity additions approached 1 GW in 2025 as utility-scale battery projects were deployed to absorb excess solar generation during the day and deliver electricity during peak demand periods. This approach is helping maximize the value of the country’s rapidly expanding solar energy sector.Despite strong growth in emerging markets, China, the United States, and Europe remained the largest battery storage markets globally in absolute terms.

China led the world with more than 63 GW of new battery capacity added during 2025, representing approximately one-third growth compared with the previous year. Utility-scale installations accounted for around 55 GW of this total, while behind-the-meter deployments reached approximately 8 GW, supported by the continued expansion of distributed solar energy systems.The United States added approximately 19 GW of battery storage capacity during 2025, representing annual growth of around 60 percent.

Utility-scale systems contributed more than 16 GW, while behind-the-meter installations approached 3 GW. In Europe, total battery additions reached approximately 6.2 GW. Although slightly below 2024 levels, the market experienced a notable shift toward utility-scale projects, with installations in this segment more than doubling to approximately 4.6 GW.Battery storage is becoming increasingly important because of its versatility.

Unlike traditional power generation technologies that serve a single purpose, batteries can perform multiple grid functions simultaneously. They can store surplus electricity generated by renewable energy sources, release energy when demand rises, provide frequency regulation services, reduce transmission congestion, and support overall grid stability.This flexibility has become even more valuable as renewable energy penetration continues to increase.

Solar and wind power generation can fluctuate based on weather conditions and time of day, creating challenges for grid operators. Batteries help address these challenges by storing excess renewable electricity when production is high and delivering it back to the grid when generation falls or demand increases.The economics of battery storage have improved dramatically over the past decade. Battery costs declined by more than 90 percent between 2010 and 2025, driven by technological innovation, manufacturing scale, increased competition, and improvements throughout the supply chain.

These cost reductions have transformed battery storage from an expensive emerging technology into a commercially attractive solution for utilities, businesses, and consumers.As battery deployment has expanded, the primary role of storage systems has also evolved. Early battery projects were largely focused on ancillary services such as frequency regulation and grid balancing. While these applications remain important, energy shifting has emerged as the dominant use case.

The share of battery projects focused primarily on energy shifting increased from around 40 percent in 2015 to more than 90 percent in 2025.This shift reflects the growing need to move large amounts of renewable electricity across different periods of the day. Batteries can charge when solar or wind generation is abundant and discharge when electricity demand peaks, making them an increasingly important tool for renewable energy integration.Project design is evolving alongside these changing requirements.

The average duration of utility-scale battery systems continues to increase, with a growing share of projects capable of delivering four hours of storage or more. In 2025, the average storage duration of newly commissioned projects reached approximately three hours, compared with around two hours just two years earlier.Another major advantage of battery storage is deployment speed. Battery systems are highly modular and require relatively limited on-site infrastructure compared with traditional power generation technologies.

Utility-scale battery projects typically require a median construction period of around 275 days, only slightly longer than solar photovoltaic projects and significantly shorter than gas-fired power plants, which often require more than two years, or nuclear facilities, which can take more than six years to complete.Although construction times are relatively short, overall project timelines are often influenced by permitting processes, financing arrangements, and grid connection approvals. In markets such as Europe, the United States, and Japan, battery projects generally require between two and two-and-a-half years to become fully operational.

Timelines tend to be shorter in China and some Middle Eastern countries, where permitting and development processes can be streamlined.The growing influence of battery storage is already reshaping electricity system operations in several regions. Some of the most visible examples can be found in the United States, particularly in California. The state has installed more than 55 GW of solar capacity, enough to exceed peak electricity demand during periods of strong sunlight.

Simultaneously, battery storage capacity has expanded from less than 1 GW in 2019 to more than 17 GW today.As a result, batteries are increasingly performing critical balancing functions. In March 2026, battery systems supplied more than 40 percent of California’s evening electricity demand during a period of high renewable generation and rising consumption. Batteries have also become a major contributor to the state’s ramping requirements, increasing their share of hourly balancing needs from less than 1 percent five years ago to more than 60 percent during the first quarter of 2026.

Similar trends are emerging in other regions. In Texas, battery storage contributed more than 40 percent of ramping requirements within the ERCOT electricity market during April 2026. In South Australia, one of the world’s most renewable-intensive electricity systems, batteries now provide more than 30 percent of hourly ramping needs during certain periods. In Great Britain, batteries are playing an increasingly important role alongside gas generation, hydropower, and electricity imports in maintaining system stability and balancing supply and demand.

Despite the sector’s rapid growth, several challenges continue to affect deployment. Regulatory uncertainty remains a significant concern in many markets, particularly where energy storage has yet to be fully integrated into electricity market frameworks. Grid connection delays and lengthy permitting processes also remain major bottlenecks, often accounting for a large share of overall project development timelines.

Maintaining public confidence is another important consideration. While battery storage systems have demonstrated a strong safety record relative to their scale of deployment, industry stakeholders continue to emphasize the importance of robust safety standards, transparent communication, and proactive engagement with local communities.Looking ahead, battery storage is expected to become an even more critical component of global electricity systems.

As renewable energy deployment accelerates and electricity demand continues to grow, batteries will play an increasingly important role in ensuring reliable, flexible, and resilient power networks. Continued progress will depend on supportive regulatory frameworks, efficient permitting processes, and market structures that properly recognize and reward the diverse services batteries provide to modern energy systems.

With costs continuing to decline and technology capabilities steadily improving, battery storage is no longer viewed simply as a supporting technology. It is rapidly becoming a foundational element of the global energy transition and a key enabler of the cleaner, more flexible electricity systems of the future.