Power Transformer Market Size - By Core, By Winding, By Cooling, By Insulation, By Rating, By Mounting, By Application, Growth Forecast, 2025 - 2034

Power Transformer Market Size

The power transformer market was estimated at USD 21.9 billion in 2024. The market is expected to grow from USD 23.2 billion in 2025 to USD 33 billion in 2034, at a CAGR of 4%, as per a report by Global Market Insights.
 

• Renewable integration is elevating demand for larger, higher-voltage power transformers to connect distant wind and solar to load centers and stabilize variable output. For instance, the IEA concludes that to meet national energy and climate goals, countries must add or refurbish over 80 million kilometers of grids by 2040 and build new corridors to link remote renewables, requiring modern, high-capacity transmission equipment, including HVDC converter transformers, especially in renewable-rich geographies. This underpins robust transformer demand globally.
   
• Electrification and surging digital workloads are accelerating substation upgrades and transformer procurements across transmission and distribution. For example, the U.S. DOE’s LBNL analysis finds data centers consumed approximately 4.4% of U.S. electricity in 2023 and could double to triple by 2028, intensifying grid capacity needs; likewise, EIA shows commercial electricity growth concentrated in states hosting rapid computing facility build-outs. These shifts require larger power transformers and faster substation lead-times, and advanced monitoring for reliability.
   
• Policy-led grid modernisation in the U.S. is catalyzing large transformer orders as utilities harden networks and accommodate renewables. For instance, DOE’s Grid Resilience and Innovation Partnerships program has announced USD 7.6 billion for 105 projects across all states in its first two rounds, following an initial USD 3.46 billion selection in 2023, funding aimed at resilience, flexibility, and capacity expansion. Awards support advanced substations, transformer banks, and wildfire-hardening technologies, lifting near-term procurement across utilities.
   
• Transmission expansion initiatives are unlocking demand for extra-high-voltage and HVDC transformers to move power between regions. For example, in October 2024 DOE committed nearly USD 1.5 billion under its Transmission Facilitation Program to advance about 1,000 miles of new lines enabling 7.1 GW of transfer capacity across six states, de-risking projects via federal capacity contracts. This pipeline drives orders for converter transformers, shunt reactors, and large autotransformers tied to new corridors and interregional links.
   
• In Europe, decarbonisation, offshore wind build-out, and cross-border interconnection targets are driving needs for HV transformers and reactive power equipment. For instance, the European Commission’s Grid Action Plan projects electricity consumption rising around 60% by 2030 and calls for over USD 680 billion of grid investment this decade, including doubling cross-border transmission and accommodating up to 317 GW of offshore renewables, necessitating major substation and interconnector upgrades. These priorities elevate demand for HVDC transformer stations and FACTS.
   
• Across Asia, massive grid build-outs in India and China underpin sustained transformer demand. For instance, India’s National Electricity Plan (Transmission) maps 191,000 circuit-km of lines and 1,270 GVA of transformation capacity additions by 2032, while State Grid Corporation of China plans investment exceeding USD 70 billion in 2024 to expand UHV projects and intelligent distribution systems, both programs requiring extensive transformer procurement. Resulting tenders span 220–1,100 kV equipment, HVDC valves, and grid-forming assets for renewable integration.
   
• In the Middle East, cross-border interconnections and capacity upgrades are spurring orders for high-capacity transformers and compensators. For example, the GCC Interconnection Authority is expanding Kuwait’s link to roughly 3,000 MW and constructing a 400 kV line to Iraq to initially supply ~600 MW by May 2025, projects that entail new substations, reactors, and protection systems alongside large power transformers. The initiatives enhance reserve sharing and renewable uptake across the GCC, boosting medium-term procurement visibility.
   
• In Latin America, competitive transmission auctions are scaling investment and grid mileage, lifting transformer requirements. For instance, Brazil’s ANEEL homologated the results of Transmission Auction 1/2024, awarding USD 3.4 billion for 6,464 km of lines and 9,200 MVA of substation capacity across 14 states, with construction timelines of 36–72 months, directly translating to sizeable procurement of high-voltage power transformers and associated equipment. This steady pipeline underpins suppliers’ backlog planning and local manufacturing commitments through 2028.
   
   

Power Transformer Market Trends

• The adoption of digital monitoring and automation is a major trend, enhancing operational efficiency and predictive maintenance. For instance, the European Commission’s 2024 Clean Energy Technology Observatory highlights the growing deployment of digital substations and interoperable smart grid solutions across EU member states to improve flexibility and reliability. These advancements enable real-time data analytics, fault detection, and remote control, making digital-ready transformers a critical component of modern grid infrastructure.
   
• Transformer manufacturers are increasingly focusing on localizing production to mitigate supply chain risks. For example, India’s Atmanirbhar Bharat initiative and Production Linked Incentive (PLI) schemes are encouraging domestic manufacturing of high-capacity transformers, reducing import dependency and positioning India as an export hub. This policy-driven localization trend is reshaping procurement strategies and fostering regional manufacturing ecosystems to meet rising global demand for grid-strengthening equipment.
   
• The rapid integration of renewables is driving demand for advanced transformers capable of handling variable generation. For instance, Brazil recorded its largest-ever grid expansion in 2024, adding 10.9 GW of capacity—91% from solar and wind—necessitating significant investment in high-voltage transformers and reactive power equipment to stabilize the network. This underscores the trend of renewable-led grid upgrades across emerging markets.
   
• HVDC technology adoption is accelerating to enable long-distance, high-capacity power transfer. For example, the Saudi Arabia–Egypt HVDC interconnection, expected to be fully operational by 2025, will exchange up to 3 GW of electricity across 1,350 km, requiring specialized converter transformers. Such projects highlight the growing role of HVDC in regional energy integration and the rising demand for custom-engineered transformer solutions.
   
• Utilities are prioritizing grid automation and digital control systems to enhance resilience and efficiency. ENTSO-E’s 2024–2034 RDI Roadmap emphasizes digitalized power systems and hybrid AC/DC grid management as core innovation clusters, driving demand for transformers with embedded sensors and IoT capabilities. This trend reflects a shift toward intelligent grid infrastructure to support renewable integration and dynamic load balancing.
   
• Electrification of transport and industry is reshaping load profiles, creating a need for robust transmission assets. According to the U.S. EIA, electricity consumption grew by 2% in 2024 and is projected to maintain this pace through 2026, driven by semiconductor plants, EV charging, and data centers. This sustained demand growth is prompting utilities to invest in high-capacity transformers and substation upgrades to maintain reliability.
   
• Stringent energy-efficiency norms are influencing transformer design and procurement. The EU’s regulatory framework and global decarbonization targets are accelerating the shift toward low-loss, eco-friendly transformers using amorphous steel cores and biodegradable insulating fluids. Manufacturers are innovating to meet these standards while balancing cost and performance, making sustainability a defining trend in the transformer market.
   

Power Transformer Market Analysis

• Based on core, the market is segmented into berry, shell and closed cores. The shell core power transformers held a market share of over 39.5% in 2024 and is expected to grow at a CAGR of 3.6% through 2034.
   
• Closed core transformers are gaining traction due to their superior efficiency in handling high-voltage transmission, which is critical for grid modernization. For instance, the U.S. DOE’s 2024 energy efficiency standards mandate the use of advanced core materials like grain-oriented electrical steel to reduce losses in distribution transformers, directly influencing closed core adoption. These regulations aim to save USD 824 million annually in electricity costs and strengthen domestic manufacturing, creating a strong market pull for closed core designs.
   
• The demand for closed core transformers is also driven by electrification and aging infrastructure replacement. According to DOE’s 2024 report, over 55% of U.S. distribution transformers are older than 33 years, nearing end-of-life, which accelerates replacement needs. Closed core designs, known for durability and efficiency, are preferred for these upgrades to meet modern load requirements from EV charging and data centers, ensuring grid reliability under rising demand conditions.
   
• The shell type transformers are increasingly adopted for high-capacity industrial and renewable integration projects due to their superior short-circuit strength. For example, DOE’s Transformer Resilience and Advanced Components (TRAC) program emphasizes advanced transformer designs, including shell configurations, to enhance resilience and flexibility in future grids. This initiative supports R&D for innovative topologies that can handle dynamic power flows, making shell type cores a strategic choice for utilities upgrading to withstand extreme events and renewable intermittency.
   
• Another driver for shell core adoption is the push for hybrid and modular transformers in smart grids. DOE’s 2024 FITT program allocated $20 million to projects developing compact, reliable hybrid transformers for distribution networks, many of which leverage shell-type designs for better thermal performance and adaptability. These innovations align with utilities’ goals to integrate storage and power electronics, reinforcing shell core relevance in next-generation grid architectures.
   
• Berry core transformers, known for compactness and low magnetic leakage, are gaining demand in renewable-heavy grids where space and efficiency are critical. DOE’s Renewable Energy Integration program highlights the need for advanced transformer designs to support distributed generation and microgrids, where berry cores offer operational advantages. Their ability to minimize losses in compact substations makes them ideal for solar and wind integration in constrained urban or offshore environments, driving their adoption in specialized applications.
   
• The trend toward energy-efficient designs further supports berry core usage. DOE’s Advanced Transformers Workshop (2023) identified modular and scalable transformer architectures as key to future grid needs, with berry cores fitting these requirements due to their lightweight and efficient design. These configurations enable utilities to deploy transformers in decentralized networks quickly, reducing installation costs and improving flexibility, which is essential for meeting decarbonization and electrification targets.
   

• Based on cooling, the industry is segmented into dry type and oil immersed. The oil immersed power transformers captured a market share of 63.1% in 2024 and is anticipated to cross over USD 19.8 billion by 2034. Superior cooling and overload handling capability of oil immersed power transformers make them ideal for high-voltage transmission projects and renewable integration where reliability and thermal efficiency are critical.
   
• Self-cooled oil-immersed transformers remain dominant in rural and medium-voltage networks due to simplicity and reliability. For instance, Brazil’s 2024 grid expansion added 6.5 GW capacity, requiring thousands of ONAN units for distribution networks. These transformers’ natural convection cooling ensures cost-effective performance in remote areas with minimal maintenance needs, supporting electrification and renewable integration in emerging markets.
   
• Water-cooled oil-immersed transformers are gaining traction in hydro and coastal projects where water resources enable efficient heat removal. For example, China’s State Grid deployed hybrid insulating oil transformers with advanced cooling at the Tianjia Substation in 2025, improving thermal performance and extending service life by 91%. This innovation demonstrates the growing preference for water-assisted cooling in high-capacity substations and renewable-heavy grids.
   
• Forced oil circulation systems are essential for ultra-high-voltage and HVDC projects. For instance, DOE’s 2024 modernization programs highlight the role of advanced cooling classes like OFAF and OFWF in boosting transformer load capacity by up to 40%. These systems, using pumps and radiators, enable higher ratings and operational flexibility, critical for interregional transmission corridors and renewable integration. Their adoption reflects utilities’ focus on reliability under peak loads.
   
• The adoption of self-air cooled dry-type transformers is driven by safety and sustainability in urban infrastructure. For instance, India’s Smart Cities Mission emphasizes fire-safe, eco-friendly electrical equipment for metro and commercial projects, boosting demand for such cooling system in indoor substations. These transformers eliminate oil, reducing fire hazards and environmental risks, aligning with green building norms and energy efficiency mandates. Their low maintenance and compact design make them ideal for densely populated areas.
   
• Air-blast cooled dry-type transformers are increasingly deployed in industrial facilities requiring high load endurance. For example, DOE’s 2024 energy efficiency standards for distribution transformers encourage advanced cooling designs to minimize losses and improve resilience in heavy-duty applications. Air-blast systems, with forced ventilation, enhance thermal performance, supporting continuous operations in steel, mining, and petrochemical sectors where downtime is costly. This regulatory push accelerates adoption of AF cooling in mission-critical industrial environments.
   
• The dry-type segment benefits from global energy efficiency regulations and urbanization trends. The European Commission’s Ecodesign Directive mandates low-loss transformers, indirectly favoring dry-type units for indoor and renewable projects. These regulations aim to save 16 TWh annually across the EU, reducing CO₂ emissions by 3.7 million tons. Such policies, combined with technological advances like epoxy resin insulation, position dry-type transformers as a preferred choice for smart grids and sustainable infrastructure.
   

• The U.S. power transformer market was at USD 2.6 billion, USD 2.7 billion and USD 2.8 billion in 2022, 2023 and 2024 respectively. The nation held a share of 74% in 2024 across North American market and is projected to witness a noteworthy growth in the coming years.
   
• The market is driven by rapid electrification and the integration of distributed energy resources. Utilities are investing heavily in grid modernization to accommodate EV charging infrastructure and renewable generation. Additionally, aging transmission assets require replacement with high-efficiency transformers to meet reliability standards. Federal incentives for clean energy and resilience planning further accelerate demand, making the U.S. the largest market in North America for advanced transformer technologies.
   
• Canada’s transformer demand is supported by renewable energy expansion and electrification of transportation. Provinces like Quebec and Ontario are upgrading transmission networks to integrate hydropower and wind resources while preparing for EV adoption. Investments in smart grid technologies and digital substations are also increasing, driven by national decarbonization targets. These initiatives create strong opportunities for high-voltage transformers and advanced cooling systems to ensure grid stability and efficiency across Canada’s vast and diverse geography.
   
• Germany’s transformer market is propelled by its ambitious energy transition strategy, which emphasizes renewable integration and grid reinforcement. The rapid growth of offshore wind and solar capacity requires advanced transformers for HVDC links and interconnectors. Additionally, the shift toward decentralized generation and storage solutions is driving demand for flexible, high-efficiency transformer designs. Germany’s focus on reducing transmission losses and enhancing grid reliability positions it as a leading European market for innovative transformer technologies.
   
• China dominates the Asia Pacific market due to large-scale renewable deployment and ultra-high-voltage (UHV) transmission projects. The country’s aggressive electrification policies and industrial growth necessitate continuous grid expansion. Investments in smart grids and digital monitoring systems further boost demand for advanced transformers with enhanced cooling and efficiency features. China’s leadership in UHV technology and its commitment to carbon neutrality by 2060 ensure sustained market growth for both conventional and specialized transformer designs.
   
• Saudi Arabia’s transformer market is driven by its Vision 2030 strategy, which prioritizes renewable energy and grid modernization. Large-scale solar and wind projects, combined with interconnection initiatives across the Gulf region, require high-capacity transformers for transmission stability. The country is also investing in smart grid infrastructure to improve efficiency and reliability. These developments, coupled with industrial diversification efforts, create strong demand for advanced transformer technologies capable of supporting high-voltage and long-distance power transfer.
   
• Brazil leads Latin America’s transformer market due to its expanding renewable energy portfolio and transmission network upgrades. The integration of wind and solar projects into the national grid requires robust transformer infrastructure to manage variable generation. Additionally, rural electrification programs and industrial growth are fueling demand for medium- and high-voltage transformers. Brazil’s regulatory framework promoting grid reliability and efficiency further supports investments in advanced transformer technologies, making it a key regional growth driver.
   

Power Transformer Market Share

• The top five players in the global power transformer industry—Hitachi Energy, Siemens Energy, Toshiba, GE Vernova, and Schneider Electric—collectively accounted for nearly 50% of the market share in 2024, reflecting their strong technological capabilities and global presence.
   
• Hitachi Energy maintains a competitive edge through its leadership in high-voltage direct current (HVDC) technology and digital substation solutions. Its strong focus on sustainability and grid modernization enables it to serve large-scale renewable integration projects globally. The company’s advanced transformer designs, combined with predictive maintenance and digital monitoring systems, position it as a preferred partner for utilities seeking reliability and efficiency. Strategic investments in R&D and partnerships further strengthen its dominance in the power transformer segment.
   
• Siemens Energy leverages its expertise in grid automation and smart infrastructure to deliver cutting-edge transformer solutions. Its portfolio includes eco-friendly transformers using alternative insulating fluids, aligning with global decarbonization goals. Siemens Energy’s strong presence in Europe and emerging markets, coupled with its digitalization initiatives, ensures competitive differentiation. The company’s ability to integrate transformers with advanced grid management systems makes it a key player in supporting energy transition and enhancing grid resilience worldwide.
   
• Toshiba’s competitive strength lies in its robust engineering capabilities and focus on high-efficiency transformer designs for ultra-high-voltage applications. The company is a leader in supplying transformers for large-scale transmission projects, particularly in Asia and the Middle East. Toshiba’s emphasis on reliability, combined with its experience in manufacturing advanced insulation systems, ensures superior performance under demanding conditions. Its commitment to innovation and sustainability further enhances its position in the global market.
   

Power Transformer Market Companies

Major players operating in the power transformer industry are:

• Bharat Heavy Electricals Limited
• Bharat Bijlee Limited
• CG Power & Industrial Solutions
• Celme S.r.l.
• DAIHEN Corporation
• Grupo Comtrafo
• GE Vernova
• Hitachi Energy
• Hyosung Heavy Industries
• Hammond Power Solutions
• Hyundai Electric & Energy Systems
• Hangzhou Qiantang River Electric Group
• JSHP Transformer
• Kirloskar Electric Company
• Mitsubishi Electric Corporation
• Siemens Energy
• Schneider Electric
• Toshiba Energy Systems & Solutions Corporation
• WEG
• YueBian Electric
   
• Mitsubishi Electric stands out for its engineering excellence in ultra-high-voltage transformers and advanced insulation systems. The company serves large-scale transmission projects across Asia and the Middle East, leveraging its experience in delivering reliable, high-capacity solutions. Mitsubishi Electric’s commitment to innovation and sustainability drives the development of energy-efficient designs that meet stringent global standards. Its ability to provide customized solutions for complex grid requirements ensures a strong competitive position in the global market.
   
• Hyundai Electric & Energy Systems is a key player in the power transformer market, offering a wide range of high-voltage and extra-high-voltage transformers for utilities and industrial clients. The company’s competitive advantage lies in its advanced manufacturing capabilities and strong presence in Asia and the Middle East. Hyundai’s focus on quality, reliability, and cost-effective solutions positions it as a trusted partner for large-scale grid expansion and renewable integration projects worldwide.
   
• BHEL is a leading Indian manufacturer of power transformers, catering to domestic and international markets. Its competitive strength lies in its ability to deliver high-capacity transformers for transmission and generation projects, including renewable integration. BHEL’s extensive manufacturing infrastructure and government-backed initiatives enhance its market position. The company’s focus on indigenization and compliance with global efficiency standards ensures its relevance in both emerging and developed markets, supporting large-scale infrastructure development and grid modernization efforts.
   
• Hyosung Heavy Industries is a prominent supplier of high-voltage and extra-high-voltage power transformers, serving utilities and large industrials across Asia, the Middle East, and North America. Its engineering depth in 345–765 kV classes, coupled with integrated offerings (GIS, STATCOM, and turnkey substation EPC), supports grid expansion and stability programs. A global manufacturing footprint, rigorous factory testing, and lifecycle service capabilities enable Hyosung to deliver customized, fast-track solutions for interconnection, urban load growth, and renewable integration, positioning it as a reliable partner for complex, high-capacity projects.
   
• WEG is a leading Latin American manufacturer with growing global presence in power transformers for transmission, sub-transmission, and high-capacity industrial loads. The company’s competitive edge stems from vertically integrated manufacturing, robust testing infrastructure, and cos-effective delivery across the Americas. WEG supports renewable build-outs and grid reinforcement with custom engineered units, ester-fluid options, and digital monitoring packages. Its multi-country production base and field services provide schedule certainty and lifecycle support, making WEG a preferred supplier for utilities and EPCs executing expansion programs and reliability upgrades.
   

Power Transformer Industry News

• In September 2025, Hitachi Energy announced an additional USD 195 million investment to expand its large power transformer manufacturing facility in Varennes, Quebec. This expansion aims to meet surging demand for grid infrastructure driven by renewable integration and electrification. The project will enhance production capacity, create new jobs, and strengthen North America’s transformer supply chain. This move aligns with Hitachi Energy’s broader strategy to support the energy transition and ensure reliable, sustainable power delivery across global markets.
   
• In September 2025, Siemens Energy announced a USD 258 million investment to expand its transformer manufacturing facility in Nuremberg, Germany, addressing rising global demand for large transformers critical to grid expansion. The project will add 16,000 square meters of production space, increase capacity by 50%, and create 350 new jobs. Construction will proceed while operations continue, with completion expected by 2028. Supported by up to €20 million in Bavarian funding, this expansion strengthens Nuremberg’s role as a hub for energy transition technologies.
   
• CG Power & Industrial Solutions Ltd. announced a USD 3.1 million investment in October 2024 to increase its power transformer manufacturing capacity from 35,000 MVA to 40,000 MVA. This expansion follows previous upgrades, including a USD 14.6 million investment in FY23 that boosted capacity from 17,000 MVA to 25,000 MVA, and the ongoing enhancement of the Malanpur “T3” unit to 35,000 MVA, scheduled for commissioning by March 2025. Additionally, the company expanded its Bhopal facility’s distribution transformer capacity from 6,900 MVA to 9,900 MVA to meet growing domestic and export demand.
   

The power transformer market research report includes in-depth coverage of the industry with estimates & forecast in terms of revenue (USD Million) and volume (Units) from 2021 to 2034, for the following segments:

Market, By Core

• Closed
• Shell
• Berry

Market, By Winding

• Two winding
• Auto-transformer

Market, By Cooling

• Dry type
  • Self air
  • Air blast
• Oil immersed
  • Self cooled
  • Water cooled
  • Forced oil
  • Others

Market, By Insulation

• Gas
• Oil
• Solid
• Air
• Others

Market, By Rating

• ≤ 100 MVA
• > 100 MVA to ≤ 500 MVA
• > 500 MVA to ≤ 800 MVA
• > 800 MVA

Market, By Mounting

• Pad
• Pole
• Others

Market, By Application

• Residential
• Commercial & industrial
• Utility

The above information has been provided for the following regions and countries:

• North America
  • U.S.
  • Canada
  • Mexico
• Europe
  • Germany
  • France
  • Russia
  • UK
  • Italy
  • Spain
  • Netherlands
• Asia Pacific
  • China
  • Japan
  • South Korea
  • India
  • Australia
• Middle East & Africa
  • Saudi Arabia
  • UAE
  • Qatar
  • Egypt
  • South Africa
  • Nigeria
• Latin America
  • Brazil
  • Peru
  • Argentina