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Supporting note · AI x Energy

Transformer Lead Times Stretch to 4-5 Years, Confirmed by PV Magazine and Wood Mackenzie

PV Magazine USA reported on May 11 that US large power transformer lead times have stretched to as long as four years, with high-capacity custom units now reaching five years. Wood Mackenzie data shows China transformer imports surged from under 1,500 units in 2022 to over 8,000 units in 2025 YTD October.

May 25, 2026 · 3 min read

Summary

US large power transformer lead times now stretch to as long as 4 years for standard high-capacity units and 5 years for custom-engineered specifications, up from a 24-30 month baseline pre-2020. PV Magazine USA reported on May 11, 2026 that “power developers and data center operators compete for limited factory production slots, with long transformer lead times now dictating power project schedules across the country.” Wood Mackenzie data (cited by Bloomberg) shows China transformer imports to the US surged from fewer than 1,500 units in 2022 to over 8,000 units through October 2025 - evidence that US developers are reaching outside North American supply.

What’s Driving It

  • Demand: data center boom, electrification, grid hardening, BTM gas plant requirements
  • Supply: small number of global OEMs (Hitachi Energy, Eaton, ABB, Siemens Energy, Hyundai Electric)
  • Raw materials: grain-oriented electrical steel produced by a handful of mills globally
  • Manufacturing capacity: Hitachi Energy committed $6B + 15,000 hires over 3 years (covered Ep4); $457M Virginia facility targets largest US LPT plant by 2028 - but not online until 2028

Conclusions

This is the operational mechanism behind the us-data-center-delays-12gw story. A 2026 data center cannot meet its 2026 build target if the transformer order placed in 2024 still has 18+ months to go on a now-five-year lead time. Even with the China import surge, total flow is below the US demand curve.

Data center deployment cycles run under 18 months. Transformer lead times now run 36-60 months. The mismatch is structural and cannot be closed by capex alone.

Behind-the-Meter Implication

A BTM project orders its on-site generation and its step-up / step-down transformers as part of an integrated procurement package, typically working directly with the OEM rather than queuing for a utility-side replacement order. This does not solve the underlying supply constraint, but it changes the queue position - a BTM developer who locks in a slot when the project is announced (often 2-3 years before commissioning) can sometimes secure delivery aligned to construction timeline.

The grid-connected developer, by contrast, depends on the utility’s transformer procurement, which is part of a much larger, slower queue.

Our Thinking

The transformer shortage is now established as fact across at least three independent reporting threads:

  1. OEM commentary (Hitachi Energy CEO Schierenbeck calling sector “overwhelmed”, Ep4)
  2. Project tracker data (Wood Mackenzie / Cleanview on delays, this episode)
  3. Trade data (China import surge, Bloomberg / Wood Mac)

The PV Magazine May 11 piece adds a fourth: industry-press confirmation that lead times dictate project schedules, not the other way around. That is the language of supply-side dominance.

For Roman’s energy-services audience: the transformer supply chain is now a Tier 1 strategic input to every gas-fired and grid-connected project. Project finance underwriting, EPC scheduling, commissioning dates - all now run downstream of transformer slot allocation.

The under-priced second-order effect is switchgear and breaker shortages, which the Tom’s Hardware piece on data center delays explicitly groups with transformers. Eaton’s Q1 (see eaton-q1-electrical-backlog) showed Electrical Americas backlog +44% YoY - the same supply-favored pricing dynamic spreading across electrical equipment more broadly.

Watch

  • Hitachi Energy South Boston VA facility construction milestones (targets 2028 ribbon-cut)
  • Hitachi Energy India quarterly prints - transmission segment leads the order book
  • DOE Large Power Transformer initiative milestones
  • China tariff exposure on transformer imports (US trade policy)
  • Any hyperscaler-direct investment in a transformer manufacturer
  • Hubbell, ABB, Schneider Q1/Q2 prints for switchgear pricing benchmarks
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Supporting note · AI x Energy

Transformer Lead Times Stretch to 4-5 Years, Confirmed by PV Magazine and Wood Mackenzie

PV Magazine USA reported on May 11 that US large power transformer lead times have stretched to as long as four years, with high-capacity custom units now reaching five years. Wood Mackenzie data shows China transformer imports surged from under 1,500 units in 2022 to over 8,000 units in 2025 YTD October.

May 25, 2026 · 3 min read

Summary

US large power transformer lead times now stretch to as long as 4 years for standard high-capacity units and 5 years for custom-engineered specifications, up from a 24-30 month baseline pre-2020. PV Magazine USA reported on May 11, 2026 that “power developers and data center operators compete for limited factory production slots, with long transformer lead times now dictating power project schedules across the country.” Wood Mackenzie data (cited by Bloomberg) shows China transformer imports to the US surged from fewer than 1,500 units in 2022 to over 8,000 units through October 2025 - evidence that US developers are reaching outside North American supply.

What’s Driving It

Conclusions

This is the operational mechanism behind the us-data-center-delays-12gw story. A 2026 data center cannot meet its 2026 build target if the transformer order placed in 2024 still has 18+ months to go on a now-five-year lead time. Even with the China import surge, total flow is below the US demand curve.

Data center deployment cycles run under 18 months. Transformer lead times now run 36-60 months. The mismatch is structural and cannot be closed by capex alone.

Behind-the-Meter Implication

A BTM project orders its on-site generation and its step-up / step-down transformers as part of an integrated procurement package, typically working directly with the OEM rather than queuing for a utility-side replacement order. This does not solve the underlying supply constraint, but it changes the queue position - a BTM developer who locks in a slot when the project is announced (often 2-3 years before commissioning) can sometimes secure delivery aligned to construction timeline.

The grid-connected developer, by contrast, depends on the utility’s transformer procurement, which is part of a much larger, slower queue.

Our Thinking

The transformer shortage is now established as fact across at least three independent reporting threads:

  1. OEM commentary (Hitachi Energy CEO Schierenbeck calling sector “overwhelmed”, Ep4)
  2. Project tracker data (Wood Mackenzie / Cleanview on delays, this episode)
  3. Trade data (China import surge, Bloomberg / Wood Mac)

The PV Magazine May 11 piece adds a fourth: industry-press confirmation that lead times dictate project schedules, not the other way around. That is the language of supply-side dominance.

For Roman’s energy-services audience: the transformer supply chain is now a Tier 1 strategic input to every gas-fired and grid-connected project. Project finance underwriting, EPC scheduling, commissioning dates - all now run downstream of transformer slot allocation.

The under-priced second-order effect is switchgear and breaker shortages, which the Tom’s Hardware piece on data center delays explicitly groups with transformers. Eaton’s Q1 (see eaton-q1-electrical-backlog) showed Electrical Americas backlog +44% YoY - the same supply-favored pricing dynamic spreading across electrical equipment more broadly.

Watch