Battery Storage Installations Hit Record Pace as Data Center Demand Reshapes the Market
Global BESS capacity is on course for a sixfold increase by 2030, but grid queues and China-dependent supply chains threaten to slow the build-out.
China and the United States together held 74.6% of global battery energy storage system capacity at the end of 2025, according to Asian Power, anchoring a market that analysts now project will grow sixfold between 2025 and 2030 at a compound annual growth rate of 42%. The scale of that ambition is already visible in the quarterly data: the U.S. alone added 3.3 GW and 8.4 GWh of energy storage in the first quarter of 2026, with records set across utility-scale, residential and commercial segments, according to Wood Mackenzie and the American Clean Power Association.6,4
The U.S. finished 2025 having added a record 57.6 GWh of new battery capacity in the full year, lifting total deployed capacity to 166.1 GWh, the Solar Energy Industries Association reported. Annual deployments are projected to reach 110 GWh by 2030, with a growing share tied directly to data center demand.1
That data center connection has changed the shape of the opportunity. Power demand from AI-driven facilities could reach between 9% and 17% of U.S. electricity supply by 2030 — up to 790 terawatt-hours, against roughly 4% as of May 2026 — according to the Electric Power Research Institute. Storage developers have moved quickly to position themselves. Fluence CEO Julian Nebreda said his company is engaged in more than 30 GWh of data center-related storage projects globally, with a meaningful share in the United States. Tesla recorded $430 million in revenue from selling storage systems to Elon Musk's xAI, and Calibrant Energy has contracted to provide a 31 MW/62 MWh system at an Aligned data center campus in the Pacific Northwest.1
Tesla's broader push is visible internationally too. The company signed a multi-year supply and execution agreement with NatPower, a clean energy infrastructure provider, covering more than 25 GWh of battery energy storage systems in Europe, OilPrice reported on June 24 (2026-06-24).5
Europe is accelerating from a smaller base but at a rapid clip. The European battery storage market installed 36 GWh of new capacity in 2025, and SolarPower Europe projected on Tuesday June 23 (2026-06-23) that installations would quadruple by 2030, led by utility-scale projects.3
Australia is dealing with the consequences of rapid residential uptake rather than the anticipation of it. According to Sunwiz data published by RenewEconomy, 1.5 GWh of home batteries were installed in May (2026-05), a material decline from April and the first month under a reduced incentive regime. Batteries and wind generation have already begun compressing evening peak prices in the National Electricity Market, with more pressure on gas and coal revenues expected as the fleet scales.2
The strain on incumbents is deliberate. Storage is being deployed specifically to capture daytime solar surpluses and release them into the evening, displacing the peaking gas generation that has historically earned the highest margins. For gas traders, the erosion of that peak premium is not a distant scenario — it is already showing up in Australian spot prices.2
Scaling to meet the forecasts will require confronting two structural problems that developers have been reluctant to lead with in their public commentary. Grid connection queues in the United States remain long, with battery projects competing against generation for interconnection slots that take years to clear. And the supply chain is heavily weighted toward Chinese manufacturing, according to Reuters reporting on May 18 (2026-05-18), leaving U.S. developers exposed to any escalation in trade policy.1
The cumulative target — 200 GW and 655 GWh of installed capacity globally by 2031, with utility-scale projects accounting for 85% of installations — implies a build rate that has no historical precedent in the storage sector. Grid infrastructure and supply chains have not yet demonstrated they can keep pace with that rate, and the quarterly deployment figures, however strong, do not settle that question.5
For now, the data center demand story is doing considerable work in sustaining developer confidence and attracting long-term supply agreements. But the interconnection queue and import dependency are not problems that contract signings resolve. The more useful signal in coming quarters will be how many of the projects currently in development actually reach commercial operation on schedule — and whether U.S. trade policy toward Chinese battery components shifts in a direction that forces developers to reprice their assumptions.1