To avoid political backlash and waits of up to four years for grid connections, tech companies are already building their own power supplies for many new data centers.

Nearly three-quarters of planned generation equipment for data centers is natural gas fired, according to energy research firm Cleanview, which is tracking 56 GW of projects across the US.

Wednesday’s pledge would see tech companies expand these efforts to prevent higher power costs being pushed on to customer bills.

Josh Price, director of energy and utilities at strategy firm Capstone, said Big Tech was “trying to push back against the narrative that they’re the bad guy.”

But the boom in data center building is already pushing the limits of the supply chain for power generation, making it difficult for companies to meet their commitment to Trump.

Competition for gas turbines is fierce, with waits as long as seven years for new orders.

Turbine-maker GE Vernova said it would expand production by 25 percent, and Mitsubishi Power announced plans to double its output over the next two years. But manufacturers have been cautious about expanding capacity, and it may not be enough to meet booming demand.

Two-thirds of gas projects in development in the US have not announced a turbine manufacturer, according to Global Energy Monitor.

The price of gas turbines has risen sharply, and greater competition from tech companies will mean higher costs for utilities and industrial customers who also need generating capacity—costs that could still be passed on to ratepayers.

To overcome shortages, data centers are increasingly relying on alternatives. Companies, including Google and Microsoft, have also struck deals to reopen nuclear power plants, but these plans will take years to deliver.

In the near term, companies are using options such as reciprocal engines and diesel generators. Experts point out that these power sources, as well as ordinary gas turbines, are not designed to provide the kind of continuous power needed by data centers.

“They say, ‘we have documented evidence that these can run 90 percent of the time’… But that’s not the average use case,” said Jigar Shah, an energy investor and former Department of Energy official.

Keeping these data centers, and their power supplies, operational for decades would also present challenges around securing spare parts and qualified technicians, he added.

Shah said: “The level of ineptitude by which the data center companies are sleepwalking into major problems just seems shocking for trillion-dollar companies.”

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