Battery Storage Surges 66% as AI Strains Global Power Grids

A Record Year for Battery Storage

Global battery storage capacity jumped 66% in 2025, with China now controlling nearly half of the world's installed capacity, according to industry data highlighted this year 1. The growth reflects a broader scramble to add flexibility to power grids that are increasingly strained by new sources of electricity demand, chief among them the rapid buildout of artificial intelligence infrastructure and data centers. As grid operators worldwide grapple with how to balance supply and demand, storage has emerged as a critical tool for smoothing out fluctuations and integrating renewable generation, and China's dominant position gives it significant leverage over a technology that other nations are racing to scale up 1.

AI and Chips Reshape Demand Forecasts

Nowhere is the demand pressure clearer than in South Korea, where AI data centers and semiconductor manufacturing expansions are prompting the government to revise its 2040 electricity demand forecast upward, with new projects potentially adding as much as 50 gigawatts of load 2. That figure underscores how quickly computing and chipmaking have become major variables in national energy planning, forcing utilities and regulators to rethink assumptions that predate the current AI investment boom.

Is the US Grid Actually at Risk?

In the United States, the picture is more nuanced. An analysis of grid data suggests that AI data centers are creating real bottlenecks, but these are concentrated in specific localities and interconnection queues rather than signaling an imminent nationwide shortfall 3. In other words, the strain is showing up as congestion where new facilities are clustered and where connecting them to the grid takes time, not as a broad collapse in generating capacity across the country.

Prices Climb as Regional Grids Strain

Even so, the financial consequences of rising demand are already visible. PJM, the grid operator coordinating electricity service for roughly 67 million consumers across 13 states, has again seen the capacity price it pays generators hit a temporary ceiling, a signal that the market expects tighter supply-demand balances ahead 4. Forecasts tied to this dynamic point to continued electricity price increases through 2030 as regions work to keep pace with growth 4.

Regional Planners Respond

The Pacific Northwest offers another example of how utilities are responding. A draft regional power plan calls for a substantial buildout of new energy infrastructure over the next six years to accommodate surging demand in the area 5. Combined with South Korea's forecast revision and PJM's price pressures, the Pacific Northwest plan illustrates a pattern repeating across multiple grids: planners are being forced to accelerate infrastructure investment timelines well beyond what was anticipated just a few years ago.

Why It Matters

Taken together, these developments show a global energy system adjusting in real time to the demands of AI computing, chip fabrication, and electrification. Battery storage growth, led overwhelmingly by China, offers one lever for managing volatility, while grid operators in the US, South Korea, and the Pacific Northwest are each confronting the practical and financial costs of keeping pace with demand that is rising faster than infrastructure can currently accommodate.