Demand is outrunning the way facilities get built. The IEA projects data-centre electricity consumption will roughly double from about 1.5 percent of global electricity today to around 945 TWh — about 3 percent — by 2030 (2025 estimate)[1]. In the United States, Lawrence Berkeley National Laboratory measured data centers at 4.4 percent of national electricity in 2023 and projects 6.7 to 12 percent by 2028[2]. The binding constraint has moved from chips to sites and grid connections: the IEA reported in 2025 that connection bottlenecks tightened even as data-centre electricity use surged[3].
At the same time, the unit of compute is densifying. The Uptime Institute’s 2025 operator survey shows rack densities climbing into the 10–30 kW band[4], and rack-scale systems such as NVIDIA’s GB200 NVL72 place 72 GPUs in a single liquid-cooled rack[5]. ASHRAE’s technical committee has documented why air cooling gives way to liquid at these densities[6]. Buildings designed around air handling absorb this shift slowly and expensively.
The modular response treats the facility itself as a manufactured product: standardize one unit, integrate and test it in a factory, and repeat it, instead of engineering each building as a bespoke project. The trade-offs against conventional construction are examined in detail in the modular versus traditional data center comparison.