High-Voltage Grid Components Market Forecast, 2025-2030: At 765 kV, Rivals Will Buy Bushings From a Competitor

GE Vernova's purchase of Trench reshapes an estimated $6.6 billion high-voltage component layer, and at 765 kV and HVDC, transformer makers without their own bushing lines will buy a part their deliveries wait on from a competitor.

On October 28, 2026, GE Vernova agreed to acquire Trench Group for the equivalent of nine billion dollars, a low-teens multiple of Trench's expected 2028 adjusted EBITDA. Trench supplies bushings, instrument transformers and coils to GE Vernova's own rivals: it holds long-term agreements with Hitachi Energy and Siemens Energy and 765 kV bushing agreements with Hyosung, HD Hyundai Electric and SGB-SMIT.

My analysis sizes the global high-voltage component layer (bushings, instrument transformers, and coils and reactors, measured as producer revenue) at an estimated $6.6 billion in 2025, growing at a base-case 7.0% CAGR to $9.3 billion in 2030. After the close, expected in late 2027, an estimated three-fifths of the layer will be made by companies that also build the equipment it goes into. The deal itself moves an estimated sixth of the layer; the rest of that share, an assumed figure, was already in-house.

Growth is fastest at 765 kV AC and HVDC. At the ±800 kV HVDC class, the searches for this report identified no independent bushing producer outside China once Trench is inside GE Vernova. There, transformer makers without their own bushing lines will be buying a component that gates their deliveries from a competitor. The report runs to sixty pages, with fourteen company profiles, fourteen charts and figures, and a forecast to 2030 under three growth scenarios, built from three sizing methods.

Report Highlights:

• Ownership After the Close: Once GE Vernova closes on Trench, companies that also build the transformers and HVDC equipment these components go into will make an estimated three-fifths of the layer, within a range from just over half to about seven-tenths. The deal itself moves an estimated sixth; the rest of that share, an assumption carried with a range, was already made in-house.
• Supply Dependence, Buyer by Buyer: Four transformer makers hold Trench supply agreements and were not found making their own extra-high-voltage bushings. After the close they will buy a component that gates their deliveries from a business owned by a competitor; the report names each one and maps its exposure, and the change bites at renewals and new 765 kV and HVDC awards rather than under today's agreements.
• Voltage-Tier Sizing: The 765 kV AC and HVDC tier is the smallest slice of the layer and the fastest growing. The report sizes each of the three voltage tiers, with its own growth rate and year-by-year forecast.
• An Independent Bushing Benchmark: One producer's forecast revenue for all its bushing types sits above a published estimate for all transformer bushings in the same year. The report sizes high-voltage bushings independently, from producer revenue.
• Capacity on the Deal's Clock: GE Vernova is paying for growth it forecasts itself, with Trench revenue rising by more than a third over the two years to 2028. Hitachi Energy's Alamo expansion is due in mid-2027, and Trench's Charlotte plant ships its first 765 kV bushings in early 2028.
• Three Sizing Methods, Published Intervals: The base year combines a Trench-anchored estimate, a bottom-up build by product and a cross-check against published estimates restated to the high-voltage scope. The report publishes its intervals and method weights, and applies three growth scenarios to the point estimate.

This report will provide answers to the following questions:

• How large is the global high-voltage component layer (bushings, instrument transformers, and coils and reactors), and how fast will it grow through 2030?
• What share of the layer will equipment makers produce once GE Vernova closes on Trench, and how much of that shift does the deal itself account for?
• Which transformer makers will buy extra-high-voltage bushings from a competitor after the close, and when does that exposure bite?
• Which producers are qualified at the 765 kV AC and ±800 kV HVDC bushing classes, and where are the independents?
• How fast is the top voltage tier growing against the lower classes, and what is driving it?
• How do published bushing market estimates compare with producer revenue?
• How will capacity additions, qualification lead times and renewal terms shape supply after the deal?

Methodology

Our analysis originates from primary research - direct interviews with executives, operators, and technical practitioners actively shaping these markets. This fieldwork provides access to perspective and data not available in secondary sources: what decision-makers are observing in real time, the problems driving purchasing behavior, and where they see value migrating. Every data point and claim undergoes human verification before inclusion; figures that cannot be substantiated or traced to credible sources are excluded.

Market sizing triangulates across multiple independent estimation methods, producing investment-grade estimates with assumptions documented explicitly so readers can evaluate the underlying logic, stress-test key inputs, and defend the numbers in boardrooms and diligence processes. We validate quantitative claims against peer-reviewed research, regulatory filings, and observable market signals - including systematic searches for contradicting evidence. Where methods produce divergent estimates, we investigate the source of variance and report ranges rather than false precision. Forecasts are constructed through scenario modeling anchored to base rates from comparable markets. (While every effort has been made to ensure accuracy, forward-looking statements reflect current expectations and are subject to risks, uncertainties, and assumptions that may cause actual results to differ materially.)

The result is thesis-driven analysis that delivers clear conclusions: specific enough to cite, transparent enough to verify, comprehensive enough to satisfy diligence requirements, and rigorous enough to withstand the follow-up question.

Target Audience

• Procurement and supply-chain teams at transformer and HVDC equipment makers
• Utility and transmission grid planners
• Grid-equipment investors
• Strategy and corporate development teams at grid-equipment makers