Water Cooled Transformer Market Size - By Core, By Product, By Winding, By Voltage, By Insulation, By Rating, By Application, Analysis, Share, & Forecast, 2025 - 2034

Water Cooled Transformer Market Size

The global water cooled transformer market was estimated at USD 13.9 billion in 2024 and is estimated to reach the value of USD 23.6 billion by 2034, growing at a CAGR of 5.2% from 2025 to 2034. The evolution of industrial requirements, energy efficiency targets, and reliable cooling in high-load applications drives the demand for water cooled transformers.
 

The transformation and growing focus on heat management towards increasing the longevity of the system is fostering the adoption of water cooling systems. The modernization of power infrastructure and the growing use of compact, high-capacity systems have led to market growth opportunities. For instance, in April 2025, with plans to launch new and upgraded urban transport power facilities, PM Modi will initiate the Panki power plant and Kanpur metro phase 2.
 

Sustainability regulations and environmental policies impact innovation in the water-based transformer cooling market. However, the market is constrained by complexities of maintenance and water quality control. For instance, the EU Eco-Design Directive (2009/125/EC) came into force January 2023 and increases the efficiency rating requirements for power transformers which, at the same time, fosters the use of more advanced cooling technologies.
 

The market is growing due to the increased adoption of thermal management technologies and system engineering. This growth is evident in industrial and utility applications. In January 2022, Baobian Electric commissioned the world’s first 500 kV water cooled DC transformer in Guangzhou. This device executes real-time monitoring using 5G, performs voltage transformation, power thermal management, and exerts improvements on high power transmission, advancing the critical power transmission technologies.
 

The Trump administration's tariffs on steel and aluminum as well as electrical components will likely increase the costs of water cooled transformers, thereby increasing prices and delaying project timelines. The supply chain may face further constraints due to the heavy dependence on imported materials. These tariffs may blunt local manufacturing but will stifle the rate of expansion for the power grid and new infrastructure systems.
 

Water Cooled Transformer Market Trends

• The market for water cooled transformers is continuously changing due to the technological innovations, renewable energy, sustainability efforts, and eco-friendly practices. The use of new materials and the integration of microchannel designs have increased the thermal efficiency of the cooling system while also enhancing its reliability.
   
• Smart monitoring systems now enable predictive maintenance, which reduces operational downtime and enhances transformer performance. The expansion of renewable energy projects has increased the importance of water cooled transformers in managing variable power loads and maintaining grid stability.
   
• The smart city initiatives and expansion of metropolitan regions have necessitated the procurement of high-density and modular transformers for hardware installations. As an example, in March 2025, ICLEI along with Kaohsiung City signed an agreement to begin the Kaohsiung-ICLEI Climate Neutral and Smart Cities Community of Practice with the purpose of advancing climate neutrality and smart city technologies. This collaboration will focus on sustainability, energy transition, and urban resilience across East Asia and the Asia-Pacific.
   
• The market shows increased focus on environmental sustainability through the incorporation of eco-friendly insulation fluids and designs that reduce energy losses. These developments demonstrate the water cooled transformer market's growth potential, with emphasis on operational efficiency, environmental sustainability, and adaptation to changing energy requirements.
   

Water Cooled Transformer Market Analysis

• In the water cooled transformer industry, core segment encompassing closed, shell, and berry configurations are evolving to meet the demands of energy efficiency, grid modernization, and renewable integration. The market was valued at USD 12.1 billion, USD 13 billion and USD 13.9 billion in 2022, 2023 and 2024 respectively. The closed core water cooled transformers dominate the market and is expected to reach over USD 9.5 billion by 2034.
   
• Closed core transformers are being developed for smart grids through the addition of IoT sensors and real-time diagnostics which improves operational efficiency through better predictive maintenance. With superior energy efficiency and high tolerance for load cycling, shell core transformers are becoming popular as they meet the needs of renewable energy applications and urban infrastructure.
   
• For instance, in November 2023, DNV, Siemens Energy, and other partners launched a collaborative project aimed at improving transformer sustainability through standardized approaches, including life cycle assessments and environmental product declarations.
   
• Berry core transformers are preferred due to their small size and lesser core losses, which are important for smart grids and renewable energy systems. In 2024, Lamco Transformers introduced new cooling, on-load tap changers, amorphous cores, and advanced renewables integration innovations. Together, these core segment innovations promote the adoption of water cooled transformers in modern electric power distribution systems.

• The water cooled transformer market is witnessing distinct trends across commercial, industrial, and utility applications. The industrial application segment held 50.1% market share in 2024 and is anticipated to grow at a CAGR of over 4.5% till 2034.
   
• In commercial sectors, attention is given to smaller, more efficient transformers and power plants for data centers and office buildings which have a reliable power supply and cause minimal disruption to services. For instance, in April 2025 Vaisala OP100 DGA with Nitrogen and Oxygen monitoring upgrades enables better oxygen and nitrogen real-time monitoring of transformers, real-time monitoring, fault detection, and failure risk mitigation monitoring is improved.
   
• In industrial sectors like manufacturing and petrochemicals, highly efficient transformers are vital due to the strenuous operational capabilities needed to endure high-capacity loads. Utilities are concentrating on the retrofitting and integration of intelligent technologies to age-old grid infrastructure alongside renewables. For example, Canada has spent more than USD 960 million on renewable energy and grid modernization projects initiated in June 2021.
   
• Water cooled transformers help improve reliability and efficiency of the grid, meeting the global transition towards sustainable energy frameworks. All these frameworks highlight the scope and the diversity of regions working towards solving different energy challenges, particularly in the case of water cooled transformers.

• The U.S. water cooled transformer market experienced significant growth in 2022, 2023 and 2024 and was valued at USD 1.8 billion, USD 1.9 billion and USD 2.1 billion respectively. The market is estimated to cross over USD 4 billion by 2034.
   
• The market is shaped by the advancement of grid systems, the incorporation of renewable energy sources, and the need for energy efficiency. To facilitate the transition to cleaner energy sources as well as increasing electricity demand, utilities are adopting new generation transformers.
   
• The development of smart grid technologies and predictive maintenance enhances the reliability and operational efficiency which aids in the development of the market. On the other hand, supply chain restrictions on materials and trade policies might influence the supply chains and cost.
   
• The European water cooled transformer market growth stems from renewable energy adoption and electrical grid modernization initiatives. Germany maintains market leadership through extensive infrastructure upgrades and energy efficiency programs.
   
• The evolution of smart grids and other metropolitan technologies is further propelling the growth of the market. For example, E.ON, for example, plans to increase investment in grid capacity and the integration of renewables from USD 10.23 billion to USD 47.72 billion between 2024 and 2028.
   
• The market growth in the Asia Pacific region is due to rising energy demand, urban development, and industrial growth. China is the dominant country in the region due to its considerable investment on the renewable energy and power infrastructure.
   
• Government policies fostering innovation and grid stability encourage investments in high-capacity and efficient transformers to satisfy increasing energy demand and carbon emissions reduction goals. For example, in January 2023 the State Grid Corporation of China declared that they intend to spend USD 70 billion for renewable energy powered grid infrastructure improvements.
   
• The expansion of utility infrastructure alongside smart city projects is driving the demand for water cooled transformers in the Middle East and Africa. The UAE retains its leading position in the market with the diversification of the energy mix, infrastructure development, and the use of renewable energy.
   
• The investments made into power dependability and grid stability bolster demand in the commercial and industrial sectors. For instance, in 2023, DEWA added 14 new 132kV substations in Dubai and completed 120 km of underground cabling to improve the grid’s dependability and reliability while simultaneously increasing power availability.
   

Water Cooled Transformer Market Share

The top six companies in the water cooled transformer industry include Neeltran, RoMan Manufacturing, Noratel, BEST Transformer, and Jackson Transformer Company which held over 30% market share in 2024. These companies are recognized for their engineering expertise, custom solutions, and focus on industrial and utility applications, helping them secure substantial market share through innovation, reliability, and strong client relationships.
 

In the water cooled transformer segment, Baobian Electric possessed a reasonable share of the market. Revenue for the firm was estimated at USD 30.7 million for 2024. This company’s specialization in the construction of high voltage transformers as well as participation in large scale infrastructure projects offers aids to securely defend it in this field. Through innovative practices and targeted investment, the company has been able to boost its presence in Asia alongside the rest of the world.
 

Water Cooled Transformer Market Companies

• Neeltran has been recognized for developing custom robust water cooled transformers for steel, mining, defense, and other industrial applications. The company also reported a revenue of USD 27.2 million in 2024. The company’s vigorous engineering skills, comprehensive solutions, and quality of service have enabled the company to thrive as a dependable supplier for challenging markets where advanced thermal management is critical and sustained dependability is necessary.
   
• RoMan Manufacturing focuses on the design and production of water cooled transformers for resistance welding, induction heating, and industrial automation. Their revenue also increased by USD 27.1 million in 2024. The company is focused on innovation, providing quite a number of energy efficient and low profile designs appropriate for high performing environments. With decades of experience, RoMan has built a strong global presence through customer-focused engineering and support for complex and high-duty industrial operations.
   
• Noratel manufactures a wide range of water cooled transformers with a focus on reliability, compactness, and efficient heat dissipation. In 2024, it registered a revenue of USD 10.3 million. The company handles applications in the medical, railway, and industrial fields. The engineering customizations and global presence of Noratel allows the company to offer precise solutions to clients needing compact and high efficiency thermal management systems.
   
• BEST Transformer provides water cooled transformer solutions for artificial intelligence powered industries. The company is well known for incorporating specialized skills together with quality materials to improve the durability and operational fluidity of the transformer. Its claim of having engineering versatility, adherence to international norms certify attaining the evolving expectations from clients from energy, metallurgy and transport domains.
   
• Jackson Transformer Company specializes in water cooled transformers for induction heating and melting processes. The company earned revenue of USD 6.3 million in 2023. Having a reputation in fast technical response and customer-first systems, caters to numerous solutions at high frequency. With the need for optimally tuned performance delivered rapidly, the other industrial areas needing precise management for system heat often collaborate.
   

Major companies operating in water cooled transformer market include:

• ARCHIT ELECTRICAL
• Automation International
• Baobian Electric
• BEST Transformer
• CEEG
• Control Transformer
• Crossmars Energy
• GPD Transformers
• Jackson Transformer Company
• Neeltran
• Noratel
• RoMan Manufacturing
• Sensata Technologies
• TBEA
   

Water Cooled Transformer Industry News

• In April 2025, Vaisala enhanced the Optimus OPT100 DGA by adding oxygen and nitrogen monitoring, enabling real-time diagnostic assessments of transformers. This upgrade improves failure prediction and supports more targeted maintenance planning to prevent potential issues from escalating into critical failures.
   
• In March 2025, VIE Technologies entered a strategic alliance with RESA Power to enhance transformer monitoring by integrating VIE’s predictive analytics AI with RESA’s power equipment services. The partnership aims to boost the reliability, safety, and operational efficiency of assets across utilities, data centers, and renewable energy sectors.
   
• In December 2024, Lamco Transformers began integrating advanced features such as automatic on-load tap changers, cooling systems, and newly developed amorphous cores to reduce no-load losses and enhance renewable energy integration. Additionally, the company is adopting real-time monitoring, AI-driven predictive maintenance, and eco-friendly insulating fluids to boost efficiency and support sustainability goals.
   
• In August 2023, Baobian Electric completed the commissioning of the 500 kV water cooled flexible direct transformer as part of the Guangzhou Bay Area Central Channel DC Back to Back Project. This transformer has achieved internal water cooling and 5G communication for real-time monitoring, which is a remarkable advancement in high-voltage DC transmission systems.
   

This water cooled transformer market research report includes in-depth coverage of the industry with estimates & forecast in terms of “USD Million’ & ‘000 Units” from 2021 to 2034, for the following segments:

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Market, By Core

• Closed
• Shell
• Berry

Market, By Product

• Distribution transformer
• Power transformer
• Others

Market, By Winding

• Two winding
• Auto transformer

Market, By Voltage

• Medium voltage
• High voltage

Market, By Insulation

• Gas
• Oil
• Solid
• Others

Market, By Rating

• ≤ 10 MVA
• > 10 MVA to ≤ 100 MVA
• > 100 MVA to ≤ 600 MVA
• > 600 MVA

Market, By Application

• 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
• Asia Pacific
  • China
  • Japan
  • South Korea
  • India
  • Australia
• Middle East & Africa
  • Saudi Arabia
  • UAE
  • Qatar
  • Egypt
  • South Africa
• Latin America
  • Brazil
  • Argentina