Data-centre demand stresses grid

The fight over artificial intelligence is starting to look like a fight over substations, cooling towers, and who pays the electric bill. In the past year, data centers went from being a niche piece of internet plumbing to one of the fastest-growing sources of power demand in the United States. EPRI now projects that U.S. data centers could consume 9% to 17% of the nation’s electricity by 2030, up from a much smaller share today, while the IEA says U.S. electricity demand is growing in 2025 and 2026 at more than double its average pace from the past decade, with data centers a major reason why (powering-intelligence.epri.com) (iea.org). That scale changes the politics. Investors are now pressing Amazon, Microsoft, and Google not just on carbon targets, but on basic physical impacts: how much water their sites use, how much power they draw, and what that does to nearby communities. Reuters reported on April 6 that North American data centers used nearly 1 trillion liters of water in 2025, and that shareholder groups are demanding clearer disclosure because the companies’ reporting is still patchy, especially for leased facilities and projects still under construction (finance-commerce.com) (money.usnews.com). Water was the first local flashpoint. Power is becoming the bigger one. In late March, Reuters reported that U.S. regulators and grid operators were pushing data centers to cut consumption during peak periods because AI-driven load growth is starting to raise blackout risks and power costs. In PJM, the country’s largest grid, officials are scrambling to figure out how to connect giant new loads faster without shifting the cost of new generation and transmission onto everyone else (finance-commerce.com) (pjm.com). That cost fight is no longer abstract. On April 1, the White House and a bipartisan group of governors backed a plan aimed at forcing large tech data centers on the PJM system to fund more of the power infrastructure they require. The reported logic was blunt: if hyperscalers want tens or hundreds of megawatts on short timelines, residential customers should not quietly finance the wires and capacity needed to serve them (finance-commerce.com). Once that became clear, the power industry moved to meet the buyers with something more valuable than green branding: dispatchable electrons. Constellation’s acquisition of Calpine, announced in January 2025 and completed in January 2026, is the clearest example. The deal was valued at about $16.4 billion in equity purchase price plus assumed debt, and it combines Constellation’s nuclear fleet with Calpine’s huge gas and geothermal portfolio. Calpine alone brought about 27.7 gigawatts of operating capacity across 79 plants, giving the merged company a broad mix of generation that can serve round-the-clock industrial loads, including data centers (constellationenergy.com) (sec.gov) (constellationenergy.com). Even that may not be fast enough for the biggest customers. Some tech companies are now building what is effectively a shadow grid beside the real one. The Washington Post reported in February that firms including Meta, OpenAI, and Oracle were pursuing data center projects paired with private on-site power plants, mostly fueled by natural gas, because utility interconnection timelines were too slow. Researchers identified at least 47 such off-grid projects nationwide. That is what happens when a digital boom runs into the hard pace of turbines, transformers, and transmission permits (finance-commerce.com). The local backlash follows naturally. In Virginia, the country’s biggest data-center market, a state review found that policymakers should require reporting on energy and water use, tighten rules for backup-generator emissions, and make sure non-data-center customers do not subsidize the industry’s power costs. The same review noted that Virginia data centers already use more than 5,000 megawatts, roughly comparable to the demand of about 2 million households. When one industry starts to look like a second state layered on top of the first, land-use fights become grid fights very quickly (rga.lis.virginia.gov) (virginiamercury.com). That is also why the story reaches all the way down to the meter base on a house. If utilities, generators, and regulators are preparing for structurally higher load growth, then the electrical system on the customer side matters more too. Bigger service panels, backup power, smart load controls, home batteries, and EV charging are no longer just home upgrades. They are part of the same buildout. The AI boom is not only producing more chips and server racks. It is producing more transformer orders, more interconnection disputes, and more homes that need 200-amp service where 100 amps used to be enough (iea.org) (powering-intelligence.epri.com).