Tweaks to US Data Centers Could Unlock 76 GW of New Power Capacity

The rapid expansion of AI has sent tech companies, data center developers, and power utilities into a frenzy over the potential for soaring electricity demand in the U.S. Yet, a recent study offers a glimmer of hope, suggesting that a small tweak in how data centers manage their electricity consumption could significantly ease the strain on the grid.

The study proposes that if data centers and other major electricity consumers were to limit their power draw to 90% of their maximum for just a couple of hours at a time—totaling about one day a year—they could free up an impressive 76 gigawatts of capacity across the U.S. To put this into perspective, that's more than the total electricity used by data centers worldwide, according to Goldman Sachs, and it represents about 10% of the peak demand in the U.S. The more data centers curtail their usage, the more capacity they could unlock.

This concept of demand response isn't new. For years, utilities have incentivized large electricity users such as shopping malls, universities, and factories to reduce their power usage during peak times, like sweltering summer afternoons. In exchange for turning down the AC or powering off energy-intensive machines for a few hours, these users receive a bill credit. Data centers, however, have traditionally prioritized maintaining uptime and performance for their clients, opting out of such programs. But the study highlights that data centers could be prime candidates for demand response due to their inherent flexibility.

Strategies for Data Centers to Reduce Power Usage

The study outlines several ways data centers can adjust their power consumption:

• Temporal Flexibility: By shifting computing tasks to periods of lower demand. For instance, AI model training, which doesn't need to happen in real-time, could be rescheduled to avoid peak hours.
• Spatial Flexibility: Companies can move computational tasks to data centers in regions with lower demand. Additionally, operators can consolidate server loads and temporarily shut down some servers.
• Alternative Power Sources: For tasks that can't be delayed or relocated, data centers can rely on backup power sources like batteries, which can provide several hours of power quickly and efficiently.

Some companies are already experimenting with these strategies. Google, for example, uses its carbon-aware computing platform to facilitate demand response, a tool initially developed to reduce carbon emissions. Enel X collaborates with data centers to use batteries in uninterruptible power supplies (UPS) to support grid stability. Meanwhile, PG&E offers expedited grid connections to data centers that agree to participate in demand response programs.

While these adjustments won't entirely eliminate the need for new power sources, they could transform a potentially dire situation—where half of new AI servers might be underpowered—into one that's much more manageable.