Global Photovoltaic Step-up Transformer Market Strategic Research Report

Scope of the Report

The global Photovoltaic Step-up Transformer market size is predicted to grow from US$ 1,588 million in 2025 to US$ 2,695 million in 2032; it is expected to grow at a CAGR of 7.9% from 2026 to 2032.

In 2025, global market sales of PV step-up transformers are projected to reach approximately 61,252 units, with an average unit price of around $26,500.

A PV step-up transformer is a device that utilizes the principle of electromagnetic induction to alter AC voltage; its primary components include a primary winding, a secondary winding, and an iron core. Currently, within the realm of PV power generation and inverter technology, the relatively low output voltage of inverters necessitates the use of step-up transformers to boost this voltage to a level compatible with grid connection requirements. Due to power limitations inherent in electronic components, the inverters typically deployed in grid-connected PV power stations generally do not exceed 500 kW in capacity. Consequently, PV step-up transformers frequently adopt a design featuring an axially split low-voltage winding structure, enabling a single transformer to simultaneously accommodate the output of two separate inverters.

The direct downstream market for PV step-up transformers comprises PV power station investors and operators, EPC contractors, PV-plus-storage system integrators, inverter manufacturers, and new energy engineering firms. In its official interpretation of distributed PV policies, the National Energy Administration (NEA) noted that—amidst the rapid expansion of distributed PV systems—grid connection and power absorption capacity have emerged as primary constraints hindering further development. The NEA emphasized the need for coordinated efforts across power generation sources, the grid, loads, and energy storage systems. This underscores the fact that future demand within the PV sector will place increased emphasis on grid-connection equipment, voltage step-up apparatus, and overall grid integration capabilities.

Key market drivers include the following factors:

Continued Construction of PV Power Stations Drives Fundamental Demand for Step-Up Equipment

PV step-up transformers constitute critical components within the grid-connection systems of PV power stations, primarily fulfilling the functions of boosting inverter output voltage, facilitating the connection of collection lines, and enabling grid integration for the power station. As the construction of centralized PV bases, distributed commercial and industrial PV systems, "Agri-PV" (agriculture-integrated PV), "Fishery-PV" (aquaculture-integrated PV), and large-scale overseas PV projects continues to advance, the demand for step-up transformers, compact substations, and integrated inverter-transformer units remains robust. The National Energy Administration has also noted that, following the rapid expansion of distributed PV systems, grid connection and power absorption have emerged as significant constraints; the industry therefore requires a coordinated approach to the development of power sources, grids, loads, and energy storage systems. This implies that the construction of PV projects now demands not only solar modules and inverters but also more sophisticated step-up, grid-connection, and ancillary electrical equipment.

Heightened Requirements for New Energy Absorption and Grid Integration Drive Product Upgrades Toward High Reliability and High Integration

As the installed capacity of PV systems expands, grid operators have significantly raised their standards regarding the quality of new energy grid connections, voltage stability, system protection, remote monitoring capabilities, and operational reliability. Consequently, the PV step-up transformer is evolving beyond its traditional role as a mere voltage conversion device; it is gradually transforming into a highly integrated system solution—encompassing the transformer itself, medium-voltage switchgear, protection and control systems, communication and monitoring modules, and a prefabricated enclosure. Policies issued by the National Energy Administration regarding the grid integration of new energy sources explicitly call for accelerating the construction of supporting grid infrastructure for new energy projects, optimizing grid connection procedures, and driving the development of ancillary grid projects for key wind and solar power bases. This initiative is expected to continuously stimulate demand for booster stations, compact substations, main transformers, medium-voltage switchgear, and grid connection equipment.

The Convergence of PV and Energy Storage, Overseas Grid Modernization, and Equipment Localization Drive Long-Term Growth Potential

As the mandated ratio of energy storage capacity integrated with solar power projects increases, PV booster transformers must adapt to more complex operating conditions—including bidirectional power flow, integration with Power Conversion Systems (PCS), frequent charging and discharging cycles, and stringent requirements for harmonic suppression and temperature rise control. This necessity is driving a product evolution away from standard PV compact substations toward integrated PV-plus-storage booster units, intelligent compact substations, and prefabricated modular electrical systems. Concurrently, the growth of overseas new energy projects, the modernization of aging power grids abroad, and the rising electricity demand from data centers are generating additional demand for transformers. Chinese enterprises possess distinct advantages in manufacturing costs, delivery speed, and supply chain efficiency across the fields of compact substations, dry-type transformers, oil-immersed transformers, complete electrical sets, and system integration. Consequently, the primary focus of future growth is expected to shift from domestic standardized projects toward the burgeoning overseas markets for new energy, energy storage, and high-end power equipment.

Key Questions Addressed in this Report

What is the 10-year outlook for the global Photovoltaic Step-up Transformer market?

What factors are driving Photovoltaic Step-up Transformer market growth, globally and by region?

Which technologies are poised for the fastest growth by market and region?

How do Photovoltaic Step-up Transformer market opportunities vary by end market size?

How does Photovoltaic Step-up Transformer break out by Type, by Application?

This report presents a comprehensive overview of the global Photovoltaic Step-up Transformer market, covering market size and forecast, segmentation by product type and application, competitive landscape, leading players and regional and country-level outlook.

Segment by Type

• Oil Immersed Transformer
• Dry-type Transformer

Segment by Functional Category

• Voltage Step-up Type
• Integrated Box-type Substation
• PV-Storage Coordinated Type
• Other

Segment by Voltage Class

• 10–35 kV
• 66 kV
• 110 kV and Above

Segment by Application

• Ground Power Plant Photovoltaic System
• Industrial and Commercial Rooftop Photovoltaic Systems
• Other

Who Can Use This Report?

This report is written for decision-makers who need a clear, data-backed view of the global Photovoltaic Step-up Transformer market:

• Manufacturers, suppliers and solution providers benchmarking their position and planning product, capacity and go-to-market strategy
• Distributors, channel partners and end users in Ground Power Plant Photovoltaic System, Industrial and Commercial Rooftop Photovoltaic Systems, Other evaluating demand and sourcing options
• Investors, financial analysts and consultants assessing growth opportunities, competitive dynamics and M&A potential
• Government agencies, industry associations and research institutions tracking industry developments and policy impact