Solar Inverter Isolation Transformer for Photovoltaic Power Systems
Voltnex Power manufactures three phase dry type PV isolation transformers for solar inverter systems, photovoltaic power generation and grid-connected solar applications. Designed to provide electrical isolation and voltage transformation between the inverter and the grid or connected electrical equipment, the transformer helps meet the specific voltage, connection and operating requirements of modern PV power systems.
With custom capacity, input/output voltage, connection group, winding material and enclosure options, the transformer can be engineered for commercial, industrial and renewable energy projects. It is suitable for solar inverters, PV power systems, grid connection equipment and other applications requiring reliable dry-type electrical isolation.
Key Technical Specifications
Final electrical parameters are designed according to the solar inverter output, grid voltage, load characteristics and project requirements.

Designed for Solar Inverter and PV Systems
This PV isolation transformer is designed for applications where galvanic isolation and voltage matching are required between a solar inverter and the connected electrical system. It can be configured for different inverter output voltages, grid voltages and connection arrangements, making it suitable for both commercial and industrial photovoltaic installations.
The dry-type design uses electrical silicon steel cores and copper or aluminum windings, providing a low-maintenance solution without transformer oil. Depending on the project, Voltnex Power can supply open-frame or enclosed configurations with customized terminals, cooling, protection and monitoring options.
Applications
The transformer is suitable for solar PV systems, grid-connected solar power generation, solar inverter systems, commercial rooftop PV, industrial solar installations, microgrids and renewable energy power systems. It can also be integrated into customized power conversion and grid-interconnection equipment where electrical isolation, voltage conversion and reliable three phase operation are required.
For larger solar projects, the transformer can be engineered according to the inverter’s rated output, voltage, harmonic characteristics, connection requirements and grid-interconnection conditions.
Custom PV Isolation Transformer
Every photovoltaic system has different inverter and grid requirements. Voltnex Power provides custom PV isolation transformers based on the actual electrical specifications of the project.
You can specify:
- Rated capacity and inverter output power
- Primary and secondary voltage
- 50Hz or 60Hz frequency
- Copper or aluminum winding
- Dyn11, Yyn0 or other connection groups
- Step-up, step-down or 1:1 voltage ratio
- Natural or forced air cooling
- Open or enclosed construction
- Indoor or outdoor installation
- Temperature monitoring and protection
- Customized terminals and cable entry
For quotation, provide the inverter model, inverter output voltage, required grid voltage, capacity, frequency and connection requirements whenever available.
Why Choose Voltnex PV Isolation Transformer?
Reliable Electrical Isolation
Provides galvanic isolation between the solar inverter and connected electrical system according to the project design.
Dry Type Construction
Oil-free construction with copper or aluminum windings and electrical silicon steel core for low-maintenance PV applications.
Inverter-Compatible Design
Transformer parameters can be matched to the inverter output, grid voltage, connection group and project operating conditions.
Custom Manufacturing
Capacity, voltage, winding material, cooling, enclosure and connection configuration can be customized for OEM and engineering projects.
Factory Direct Supply
Voltnex Power provides factory-direct manufacturing, OEM/ODM service, technical support and international supply for solar equipment companies, EPC contractors, distributors and system integrators.

Frequently Asked Questions
1. What is a PV isolation transformer?
A PV isolation transformer is a transformer used in photovoltaic power systems to provide electrical isolation and voltage transformation between a solar inverter and the connected grid or electrical equipment.
2. Is a PV isolation transformer the same as a solar transformer?
They can overlap, but the terms are not identical. Solar transformer is a broader term, while PV isolation transformer specifically emphasizes the isolation function in a photovoltaic system.
3. What is a solar inverter isolation transformer used for?
It is used between a solar inverter and the connected electrical system when the project requires electrical isolation, voltage matching or a specific transformer connection configuration.
4. Is this transformer single phase or three phase?
The Voltnex PV isolation transformer described on this page is a three phase dry type transformer. Other configurations can be discussed for specific projects.
5. Can the PV transformer voltage be customized?
Yes. Primary and secondary voltages can be customized according to the solar inverter output and grid requirements.
6. Can you manufacture a custom solar isolation transformer?
Yes. Voltnex Power provides customized PV isolation transformers, solar inverter transformers and dry type transformers for OEM, EPC and industrial renewable energy projects.
7. What winding materials are available?
Copper and aluminum winding configurations can be selected according to capacity, electrical requirements, efficiency targets and project specifications.
8. Can the transformer be supplied with an enclosure?
Yes. Open-frame and enclosed configurations are available. Enclosure protection and cooling can be designed according to the installation environment.
Custom Solar Inverter Isolation Transformer Manufacturer
Voltnex Power is a China manufacturer and factory of dry type transformers and industrial power equipment, supplying customized PV isolation transformers, solar inverter transformers and three phase dry type transformers for international markets.
We support OEM/ODM manufacturing, wholesale orders, custom electrical design and factory-direct supply for solar equipment manufacturers, EPC contractors, distributors and industrial customers.
Send us your inverter output voltage, grid voltage, capacity, frequency and connection requirements to receive a customized transformer solution.











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