US bit barn boom sees energy needs grow 10x as fast as grid capacity

In the United States, the demand for electricity in datacenters is growing at a rate of roughly ten times that of the country's grid capacity, raising concerns about future power supply. The ascent of AI infrastructure is driving the construction of numerous new server farms, but it is unveiling long-standing underinvestment in the grid networks necessary to provide power.

According to insurance firm Howden, datacenters may need to obtain up to 58% of their power off the grid by 2030 to prevent the share of grid capacity from expanding. Gartner has forecasted a 26% rise in energy consumption by AI datacenters this year, with grid supply possibly struggling to keep up with demand by the end of this decade.

Howden's study of US Energy Information Administration (EIA) and S&P Global data revealed that from 2000 to 2025, power delivered to data campuses has increased by an average of 19% annually, while the electricity grid has expanded capacity by a mere 2% per annum over the same period. Datacenters' share of US grid capacity has risen to around five percent in 2025, up from just 0.1% in 2000 – a 50-fold increase.

Bain & Company, a management consultancy, has warned businesses that energy firms must accelerate grid capacity development or face significant consequences, as the energy draw by server farms is projected to more than double by 2030. This does not imply that datacenters are in jeopardy of consuming all of America's electricity, at least in the near term.

The graph may appear to show the two lines converging, but they use different scales: 1,400 gigawatts for grid capacity on the left axis, versus just 80 for datacenters on the right axis. To maintain datacenters at five percent of grid capacity by 2030, Howden estimates a 110 gigawatt expansion is required – a growth they consider unlikely.

Instead, they foresee a combination of increased reliance on the grid, slower development at power-constrained sites, and alternative power sources. For the largest, most power-constrained projects, Howden warns that grid delays of two to six years could result in $800 million to $2.4 billion in lost revenue. Power availability is emerging as one of the datacenter boom's defining challenges, according to Howden's head of Natural Resources, Stuart Adam.

As AI infrastructure demand accelerates, developers are increasingly turning to options beyond traditional grid connections to secure the electricity they require. Howden's insurance business also highlights that on-site generation introduces new operational and financial risks, as operators assume greater responsibility for their power infrastructure.