128-week transformers and the supply chain behind power delivery

When developers ask why a site five miles from a substation cannot energize for three years, the answer is often not the queue paperwork — it is a transformer that has not been ordered yet. Average lead times for large power transformers reached 128 weeks in a Q2 2025 industry survey, with some orders extending further.

128 wks

average lead time for large power transformers

Transformers are custom-manufactured for voltage, capacity, and site-specific requirements. Global demand from data centers, renewable interconnection, and grid modernization has outpaced manufacturing capacity. Utilities that delayed equipment orders during study phases are now competing for the same limited production slots.

The supply chain constraint cascades. Without a transformer, switchgear cannot be commissioned. Without switchgear, feeders cannot be energized. Without feeders, the data center cannot load. A feasibility study that identifies 'no long-lead materials' is materially different from one that flags transformer dependency — and that difference should appear in readiness documentation.

For site selection, this reinforces why advanced queue position matters. A site where the utility has already ordered equipment is not equivalent to a site where equipment has not been scoped. SRL 4 with construction underway is partly a statement about supply chain position, not just paperwork.

Landowners evaluating readiness proposals should ask a direct question: what long-lead equipment is identified, and what is its status? Anywhere DC includes equipment lead-time flags in feasibility deliverables because they are often the true schedule driver — more than permitting, more than trenching, and more than land negotiation.