Data center electricity consumption hit roughly 415 terawatt-hours in 2024—about 1.5 percent of global usage. The growth rate tells the real story: 12 percent annually, four times faster than overall electricity demand. The International Energy Agency projects consumption will double to 945 TWh by 2030, driven primarily by AI-optimized servers whose power needs could quadruple in that period.
Tech executives once promised efficiency gains. Instead, training larger models and serving billions of queries requires constant compute. A single ChatGPT query consumes several times the energy of a traditional web search. Scale that across billions of interactions, and you strain grids already under pressure from electrification of vehicles and industry.
This has forced a hard look at power sources. Nuclear offers steady baseload output without carbon emissions—a natural fit for always-on data centers. Microsoft struck a deal with Constellation Energy to restart a unit at Three Mile Island. Google committed capital to multiple advanced nuclear projects through Elementl Power, each targeting at least 600 megawatts. Amazon bought a data center campus adjacent to a nuclear station.
Goldman Sachs estimates 85-90 gigawatts of new nuclear capacity will be needed to cover data center demand growth by 2030. That translates to dozens of large reactors or hundreds of small modular designs. Construction timelines stretch long, but tech firms can sign long-term purchase agreements that de-risk projects for utilities.
Small modular reactors (SMRs) have drawn particular interest. Factory-built units promise faster deployment and flexible sizing. The pipeline of conditional agreements between data center operators and SMR developers expanded from 25 gigawatts at end of 2024 to 45 gigawatts today. Kairos Power agreed to deliver power from seven reactors to Google data centers, with the first unit slated for Tennessee around 2030.
Challenges remain. Regulatory approvals move slowly. Supply chains for specialized components lag. Public opposition lingers near proposed sites. One Meta plan for a nuclear-powered facility in Pennsylvania ran into trouble over protected bee habitats. France offers a different model: heavy nuclear reliance provides stable low-carbon power, and Data4 signed a 12-year contract with state-owned EDF for direct reactor access at production-linked pricing.
In the U.S., the Palisades plant in Michigan restarted operations last year. These efforts buy time while new builds advance. The IEA updated its outlook in April 2026: data center electricity demand jumped 17 percent in 2025, with AI-focused facilities growing even faster. Capital spending by five large tech companies exceeded $400 billion that year and is set to rise another 75 percent in 2026.
Regional disparities add complexity. Ireland's data centers consumed 17 percent of national electricity in 2022, potentially reaching 32 percent by 2026. U.S. data centers accounted for more than 4 percent of total electricity in 2023, with forecasts placing that between 6.7 and 12 percent by 2028. Utilities report bidding wars for sites with available power.
Yet AI is not only a consumer—it's becoming an energy optimizer. The technology helps improve grid operations, renewable forecasting, and accelerate design of better batteries and reactors. Efficiency improvements in chips and algorithms could temper worst-case projections, but historical doubling of computing efficiency every two years faces an open bet against exponential model growth.
Hyperscalers now prioritize energy when siting facilities. Microsoft's vice president of energy, Bobby Hollis, said the company puts "energy and power first." Capital expenditure plans from Microsoft, Alphabet, Amazon, and Meta exceeded $300 billion in 2025. Some proposals explore orbital data centers powered by constant solar flux, though technical and cost barriers remain formidable.
The industry faces a race against its own success. Nuclear stands as one pillar alongside renewables, storage, demand flexibility, and efficiency gains. No single solution carries the full load. Without urgent progress on all fronts, growth ambitions could hit a hard ceiling.
Source: Webpronews