Data center and utility projects face years-long delays for transformers
US power transformer delivery times now exceed three years, with demand surging and equipment procurement cycles unable to keep pace with the AI buildout.
In Loudoun County, Virginia, a data center shell stands finished on the outside, racks on pallets inside, awaiting a substation transformer that will not arrive for more than three years. The building was the easy part.
The AI buildout in America is now held back less by chips, land, or capital than by the wait for one piece of iron. Asia Times reported on August 13 that lead times for large power transformers have stretched past 160 weeks for US substation and generator-step-up units, with the largest machines nearing four years. Every utility’s promise to serve new load, and every hyperscaler’s pledge to open a campus, now quietly collapses into that waiting period.
The arrangement predates the boom. From 2012 through 2019, US electricity demand was flat, transformer makers consolidated, and utilities bought equipment just in time on five-year procurement cycles that assumed a steady market. Wood Mackenzie’s “Making the Connection” study found that large-power-transformer lead times were twelve to fifteen weeks in 2021. That just-in-time habit is the structure now under load.
Demand arrived all at once, and the pipeline that served it had already been thinned for a decade. The wait itself is evidence: the same Asia Times report noted substation transformer lead times had risen from about 120 weeks two years ago, as data centers began bidding against utilities for the same factory slots.
The money backs the wait. Siemens Energy stated in its fiscal third quarter that Grid Technologies orders increased 27.6 percent to 5.4 billion euros, with a book-to-bill ratio of 1.48 and the transformer and grid-equipment backlog reaching 51 billion euros, according to Turbomachinery Magazine in August 2026. A backlog growing alongside factory expansions means buyers are queuing ever further out, not catching up.
The queue was built in advance
Certain buyers anticipated this and paid for it. The largest hyperscalers began placing multi-year slot reservations with the big four manufacturers—Hitachi Energy, Siemens Energy, GE Vernova, and ABB—years ahead of their own construction timelines. Siemens Energy executives described in recent earnings calls how those reservations convert into firm orders six to twelve months out.
Makers are spending accordingly. Hitachi Energy committed over 1.5 billion dollars in April 2024 to expand global transformer output by 2027 and added another 155 million dollars across three North American plants, as detailed in a Hitachi Energy press release that month. Those buyers hold the defense built in advance. Their transformer is effectively already made, just parked in a backlog.
Buyers without such reservations have only the after-the-signal defense, and it is slow. A developer needing power for a data center in 2027 can pay a broker for a resold slot, downsize the substation, or wait. Utilities that ran lean inventories are in worse shape. Spencer Pederson of the National Electrical Manufacturers Association told Utility Dive that distribution transformer backlogs run a year or more, even as reshoring talk picks up.
The market prices the queue for buyers who planned; it does not price the small utility whose backup inventory was sized for a fifteen-week world.
For a hyperscaler ordering years ahead, this queue is measured in quarters and is survivable. For a rural cooperative that just lost a failed transformer on a storm line, it is measured in outages, with nothing ordered now arriving in time.
One maker of the core
Beneath the wait lies its own bottleneck. Transformers are built around grain-oriented electrical steel, and Cleveland-Cliffs is the only American maker of it. Washington has responded with protection: Section 232 tariffs, raised to 50 percent in 2025, were extended to electrical-steel laminations and cores, and by April 2026 to the full value of those goods, according to Cleveland-Cliffs' account of the expanded coverage.
The tariff protects one company's margin while all downstream transformer buyers pay the markup. No new domestic steel plant can be permitted, built, and qualified faster than the current queue resolves.
The standard measure of this risk has a blind spot, worth naming. “Average lead time” describes the wait for a new unit ordered today. It says nothing about the exposure of those not in the queue at all—utilities replacing storm-damaged or failed transformers, those paying spot prices or cannibalizing spares, and ratepayers whose bills absorb the premiums.
The market prices the queue for buyers who planned. It does not price the small utility whose backup inventory was sized for a fifteen-week world and is now down to its last unit before hurricane season.
The analogue is the shipbuilding orderbook from 2004 to 2008, when China’s raw-material demand stretched container-ship delivery slots past four years, and the freight market’s promises were set quarter by quarter by berths in Korean yards rather than by demand. Owners who reserved early berths carried the boom. Those who signed after the signal paid the peak.
The counteranalogue points the other way. Transformers are simpler than ships, and the big four are now spending billions on new plants—Hitachi and Siemens among them. Supply could catch demand by the late 2020s and leave the most aggressive over-orderers holding equipment they no longer need at prices they locked in too high.
Who pays is already settled this year. The manufacturers profit, with Siemens Energy’s grid backlog of 51 billion euros priced at today’s tightness, as Turbomachinery Magazine reported in August 2026. Hyperscalers with reserved slots pay a large but predictable sum. Developers without slots pay in delayed opening dates, which is why Dominion Energy’s queue for Data Center Alley keeps slipping. The utility told local reporters in 2022 that full power for new arrivals meant a four-year wait, and by 2024 it had stretched to seven, according to Prince William Times on July 15.
At the bottom is the failed-transformer replacement faced by utilities and ratepayers without a reserved slot. This part of the trade is not priced in any contract and not measured by any backlog.
The steel queue will eventually clear—because a number in weeks can, in the end, be bought down. The judgment it enforces is older. Orders placed before the wait became news own the decade; those placed after pay for the wait.