Battery Developers Chase AI Power Surge as Grid Queues Threaten Project Economics

U.S. battery storage developers are racing to lock in AI data center customers as anchor loads for grid-connected systems, but widening gaps between construction timelines and grid access are threatening to strand capital across the sector. Data centers accounted for roughly 4% of U.S. power demand as of last year. The Electric Power Research Institute projects that figure rising to 9–17% by 2030, equivalent to as much as 790 TWh annually, as AI workloads drive consumption. AI-focused facilities alone saw power demand jump 50% in 2025, making them an attractive anchor customer for battery developers seeking to smooth demand spikes and reduce dependence on diesel backup generation. The deployment numbers look strong on paper. The U.S. added a record 57.6 GWh of new battery storage in 2025, bringing total installed capacity to 166.1 GWh. The Solar Energy Industries Association projects annual additions reaching 110 GWh by 2030. The problem is getting projects connected. Interconnection queues exceeded 2,060 GW of generation and storage capacity at the end of 2025—roughly double the size of the existing U.S. power fleet. Lawrence Berkeley National Laboratory data shows only 13% of projects filed between 2000 and 2019 ever reached commercial operation. Data centers can be built in 18 to 24 months; grid interconnection in parts of the U.S. takes three to seven years. Malaysia's Johor state illustrates how quickly the bottleneck bites. Data center capacity there grew from 10 MW in 2021 to 1.3 GW in 2024, yet local authorities rejected up to 30% of new applications last year—not because of generation shortages, but because substation construction couldn't keep pace. Electricity connection approvals now take up to 18 months. Supply chains add another layer of execution risk. BloombergNEF cut its 2022 U.S. battery deployment forecast by 29% to 5.4 GW/11.7 GWh after battery pack shortages emerged, as leading manufacturers prioritized electric vehicle customers over stationary storage. Vistra was forced to restructure its 350 MW/1,400 MWh Moss Landing Phase III project because of battery supply uncertainty. Developers across the sector report contract renegotiations driven by shipping bottlenecks and China-dependent supply chains. Transmission infrastructure is a separate constraint. The U.S. needs roughly 5,000 miles of new high-voltage transmission annually to support electrification targets, according to Grid Strategies. It completed 888 miles in 2024. Southeast Asia faces equivalent pressure: of the $540 billion in green capital expenditure announced across the region's power and EV value chains through 2030, only $315 billion sits on a credible deployment path under current grid conditions, according to a May 18 report from Bain & Company and Standard Chartered. Policy responses are in early stages. The Department of Energy's Rapid Operational Validation Initiative is working to accelerate long-duration storage testing toward a 2030 commercial-readiness target, with a 90% cost reduction goal modeled on the SunShot solar program. In the UK, National Grid is reviewing reserve standards after battery systems delivered 475 MW during a 2019 blackout, restoring grid frequency within four minutes. The trade tension to watch is at the margin: data center developers increasingly pairing natural gas with storage in hybrid configurations. Those setups may clear permitting faster, but they redirect capital away from renewables-plus-storage projects and could slow the cost declines the sector is counting on. FERC interconnection reform proposals, transmission awards under the Infrastructure Investment and Jobs Act, and battery supply allocation decisions at LG Energy Solution and CATL will determine which developers can execute and which are sitting on stranded development costs.