Transformer capacity expansions in the US and EU
22 makers have announced transformer capacity in the US or EU: 20 in the US and 6 in the EU. The largest single dollar figures: Hitachi Energy’s $528M plant in Gallman, Mississippi↗, Eaton’s $340M in Jonesville, South Carolina↗ and Howard Industries’ $236.95M in Mississippi↗. Summed, each maker’s largest dollar project comes to $2,021M.
| Capacity expansion | ||||||
|---|---|---|---|---|---|---|
| Hitachi Energy | 5283 | US and EU | $528M new factory, Gallman, Mississippi, announced 2026-09-15, production 2029 (takes over Crystal Springs output); $457M large power transformer factory, South Boston, Virginia, announced 2025-09-04 (largest US LPT site, 825+ jobs); $106M Alamo, Tennessee components expansion; ~$180M new factory, Vaasa, Finland, announced 2024-04; >$30M Bad Honnef, Germany expansion (2024-02) | Power and distribution | Switzerland | 2026-11-11 |
| Eaton | 3402 | US | $340M three-phase transformer plant in an 861,000 sq ft building, Jonesville (Union County), South Carolina, announced 2025-02-12, production 2027, 700 jobs | Distribution | Ireland | 2026-11-11 |
| Howard Industries | 236.952 | US | $236.95M expansion across Clarke, Jones and Simpson counties, Mississippi, announced 2025-06, 450 jobs within five years; substation plant expansion groundbreaking 2026-04-02; new Mexico plant announced 2026-05-08 | Power and distribution | United States | 2026-11-11 |
| HD Hyundai Electric | 2004 | US | $200M second plant, Montgomery, Alabama, groundbreaking 2026-03-06, completion due 2027-04, ~50% more EHV transformer capacity and 765 kV production and testing; current plant at 105 units/yr (up from 70) | Power and distribution | South Korea | 2026-11-11 |
| Hyosung Heavy Industries (Hyosung HICO) | 1574 | US | Additional $157M Memphis expansion announced November 2025, +50% manufacturing capacity and 240 new jobs, separate from the May 2025 $50.8M project. October 2026 company update confirms cumulative investment over $300M since 2019 and a +50% expansion being completed; $300M is not a single new project amount. No completion date stated in either release. | Power | South Korea | 2026-11-11 |
| Siemens Energy | 1504 | US and EU | $150M LPT factory, Charlotte, North Carolina, announced 2024-02-14, first transformers planned early 2026, ~600 jobs; part of $1B US manufacturing plan announced 2026-02-03 that expands Charlotte LPT making and servicing; ~EUR220M Nuremberg, Germany factory expansion, announced 2025-09-05, ~50% more capacity by 2028 | Power and distribution | Germany | 2026-11-11 |
| Prolec GE (GE Vernova) | 1404 | US | $140M second plant, Goldsboro, North Carolina, announced 2025-05-14, ~200 more medium power units/yr and doubled Goldsboro capacity by 2030; new three-phase pad-mount line in Shreveport, Louisiana (1,500+ units/yr) and doubled single-phase pad-mount output | Power and distribution | Mexico | 2026-11-11 |
| Pennsylvania Transformer Technology | 102.52 | US | $102.5M Raeford, North Carolina expansion: 300,000 sq ft across two plants, 217 jobs, announced 2025-02-17, groundbreaking 2025-12-10 | Power and distribution | United States | 2026-11-11 |
| WEG | 772 | US | $77M Washington, Missouri specialty transformer expansion, reported by Ameren 10 October 2025; 1-10 MVA units through 46.5 kV; +50% capacity and 50 jobs; anticipated completion 2028 | Power and distribution | Brazil | 2026-11-11 |
| Central Moloney | 501 | US | Two Northwest Florida plants, $75M and 550 jobs in total: Panama City (140,000 sq ft, single-phase pole-mount, announced 2022-01) and Crestview (302,000 sq ft pad-mount plant, announced 2023-07, $50M to build and equip, 350 jobs) | Distribution | United States | 2026-11-11 |
| Virginia Transformer | 403 | US | $40M Rincon, Georgia plant expansion, announced 2025-11-20, +50% capacity, completion March 2027, 400 jobs; new 600,000 sq ft power transformer plant (2-500 MVA), Colbert County, Alabama, announced 2026-05-19, first production January 2028, about 1,100 jobs | Power and distribution | United States | 2026-11-11 |
| Delta Star | — | US | Delta Iron Works, an 80,000 sq ft tank fabrication shop on the Lynchburg, Virginia campus, opened 2025 | Power | United States | 2026-11-11 |
| Eaglerise | — | US | Fort Worth distribution transformer factory inauguration 22 October 2025, reported by Eaglerise on 23 December 2025 | Distribution | — | 2026-11-11 |
| ERMCO | — | US | New 566,121 sq ft three-phase transformer plant about 30 miles west of Phoenix, Arizona, production 2027, 541 jobs; added production at Dyersburg, Tennessee and Athens, Georgia; 158,000 sq ft Bristol, Wisconsin facility acquired 2025 | Distribution | United States | 2026-11-11 |
| Giga Energy | — | US | Houston transformer factory: published annual capacity 6 GW (as stated by Giga), 63,000 sq ft, checked 11 November 2026 | Distribution | United States | 2026-11-11 |
| Hammond Power Solutions | — | US | Fort Worth manufacturing lease announced 22 September 2026; approximately CAD50M initial equipment and commissioning investment; staged production Q4 2027, full production Q1 2028; approximately CAD250M initial annual manufacturing capacity (sales value, not MVA) | Power and distribution | Canada | 2026-11-11 |
| JST Power Equipment | — | US | Wytheville factory opened May 2026: 25-6,000 kVA padmount units through 35 kV; approximately 150 units planned in 2026, scaling to 1,000 from 2027. Malaysia padmount factory opened June 2025; Mexico dry-type expansion in 2024. | Power and distribution | United States | 2026-11-11 |
| Končar | — | US and EU | EUR 260M Zagreb large power transformer expansion with Siemens Energy, announced 2025-08-01: capacity from 22,000 to 30,000 MVA by 2027 and 45,000 MVA by 2031, 350 jobs; new Texas factory due 2027 (reported 2026-01-02) | Power and distribution | Croatia | 2026-11-11 |
| MGM Transformers | — | US | 430,000 sq ft Waco, Texas plant with sister company VanTran for custom liquid-filled transformers, opened 2025-04, over $1 billion of annual production capacity | Distribution | United States | 2026-11-11 |
| Ormazabal | — | EU | EUR 15M planned at Loeches over five years from 2025 to expand capacity and digitalise (after EUR 15M in the previous five) | Distribution | Spain | 2026-11-11 |
| SGB-SMIT Group | — | US and EU | EUR20M SGB-ALFA factory in Botoșani, Romania: production began July 2025, formally inaugurated 1 July 2026. Agreement for majority stake in COMEL Transformatori, Ripanj, Serbia announced 13 July 2026. Southwest Electric power transformer manufacturing division announced October 2025 in Oklahoma City. | Power and distribution | Germany | 2026-11-11 |
| ZREW Transformatory | — | EU | More than CHF 25 million over two years for new Łódź factory; scheduled to begin operations by end-2026; double capacity and extend range to 160 MVA, 220 kV; announced 4 September 2025 | Power | — | 2026-11-11 |
What counts as an expansion
How we sourceAmount, place, date
Each row gives the announced amount in its original currency, the site, the announcement date and the target start of production. The sortable dollar column holds the largest single US or EU project where the source states dollars; euro projects, such as Končar and Siemens Energy’s EUR 260M in Zagreb↗, stay in the text unconverted.
Announced is not built
Most of this capacity lands between 2027 and 2029. HD Hyundai’s second Alabama plant is due in April 2027↗, Hitachi’s Gallman plant is due in 2029↗. Hyosung’s November 2025 Memphis release confirms the investment and capacity increase but gives no completion date↗.
Asian makers expanding at home (Toshiba, LS Electric, CG Power, TARIL and others) are tagged Other and appear in the power transformer list.