Is AI guzzling all our electricity?

01What you’ve heard

The growth is real, and parts of this are worth worrying about. But the “AI is breaking the grid” headline gets the scale wrong, and points the alarm at the wrong target.

02What’s actually true

Data centers are a real and fast-growing load. They are not, at the national scale, an outlier.

Here is a comparison that puts it in scale. In 2024, every data center in the country combined used less electricity than Americans running their home air conditioners. That won’t last long: Berkeley Lab projects data centers will use about 649 TWh by 2030, far more than home air conditioning, so the comparison is likely to flip within a few years.¹²

Worldwide it’s a smaller slice still: data centers use just over 1% of global electricity.³ And while that number is climbing, data centers are only about 8% of the growth in global electricity demand expected this decade, behind both electric vehicles and air conditioning.³

The per-question scare doesn’t hold up either. A typical ChatGPT query uses about 0.3 watt-hours, roughly what an LED bulb or a laptop draws in a few minutes, not the viral figure that was an order of magnitude higher.⁴

03Where the real concern is

Here’s what the “grid apocalypse” framing buries: the legitimate fight isn’t about the national total. It’s about who pays for the buildout, and what gets burned to power it. Both are going the wrong way, and both are fixable.

On cost, PJM, the grid operator for 67 million people across the mid-Atlantic and Midwest,⁹ ran another record-setting capacity auction in December 2025, and its own independent market monitor found data center demand drove about 40% of the cost.⁵ Its next auction, in July 2026, again cleared at the price cap and came up 6,831 megawatts short of its reliability target.⁹

Researchers at Harvard’s Electricity Law Initiative found ways utilities shift the cost of serving data centers onto everyday ratepayers, especially confidential special contracts that give tech companies discounted rates. One study of data centers in Virginia found ratepayers there could see their electricity costs rise by $150 to $450 a year by 2040.⁶

And what powers all of it is sliding backward. As of December 2025, utilities had delayed the retirement of at least 15 coal plants that year, mostly to meet expected demand growth driven largely by data centers.⁷ In Memphis, residents and advocates say xAI ran dozens of gas turbines near a predominantly Black neighborhood with high asthma rates before it had air permits.⁸ In March 2026, Mississippi regulators approved 41 permitted gas turbines at xAI’s plant across the state line in Southaven, replacing 27 unpermitted ones, over local opposition.¹⁰ That is the real cost, and it lands on specific communities.