Convert green energy reliably

transformers for wind, solar, water & bioenergy

Stable power grids despite fluctuating feed-in: The R&S Group supplies energy-efficient transformers for renewable energy producers. Developed for sustainable energy infrastructures – in use worldwide.

Renewable energy needs reliable technology

The greatest challenge of our era is developing a robust infrastructure for renewable energies – from wind farms to hydroelectric power plants to bioenergy centres. The following applies:

The greener the energy, the more complex the grid integration.

Whether it’s decentralised grid feed-in, grid control, or microgrids – we understand the challenges faced by plant operators, utilities, and project developers.

With customised transformer solutions and over 100,000 units installed worldwide, we are actively shaping the energy transition – for stable grids and a secure, green future.

Why R&S for Renewables?

Optimised for volatile feed-in
Our transformers are designed for fluctuating weather conditions and changing generation profiles – ideal for wind, solar, hydro & biomass.

Energy efficiency with amorphous or low-loss cores
Minimise transformer losses with highly efficient materials and designs – for maximum grid efficiency with minimal CO₂ emissions.

Total Cost of Ownership in focus
Robust construction, minimal maintenance and durable technology ensure low operating costs over the entire life cycle.

Ready for storage & smart grid
Durable designs, minimal maintenance requirements and low operating losses ensure low life cycle costs.

 International expertise with local strength
Manufacturing & service by Rauscher & Stöcklin, ZREW, Tesar (IT/PL/Gulf) and Kyte Powertech – for fast implementation worldwide.

Increasing demand
The global growth of renewable energies is advancing quickly. Regulations like the Green Deal and Net Zero Goals are driving a huge demand for resilient infrastructure – R&S supplies the right transformers.
Changing weather patterns
Weather-based power generation can vary greatly. Our technology ensures stable voltage and frequency – regardless of sun, wind, or clouds.
Microgrids & Decentralization
Generation and consumption are becoming more closely connected. Microgrids are transforming grid architecture. Our transformers are designed for decentralised solutions and grid perturbations – including protection and control components.

Distribution transformers

Oil-insulated, low-maintenance, up to 10,000 kVA – ideal for medium-voltage networks

Power transformers

Efficient, robust, up to 160 MVA – for substations, large-scale projects & industrial connections

Cast resin transformers

Dry, safe, suitable for indoor spaces, tunnels & sensitive infrastructures

Instrument transformers

Current and voltage transformers for precise grid monitoring and protection systems

Our Brands

4 PRODUCTION SITES, 1 QUALITY PROMISE
Rauscher & Stoecklin
(Switzerland, Poland) 

High-quality oil-filled transformers and special electrical solutions since 1919

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ZREW
(Poland)

Power transformers up to 120 MVA for energy suppliers and industry

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Kyte Powertech
(Ireland)

Distribution transformers for European grids – energy-efficient & standard-compliant

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TESAR
(Italy, Poland, Gulf region)

Market leader for cast resin transformers – compact, safe, durable

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Our renewable energy solutions are used worldwide in:

  • Wind farms ( onshore & offshore)
  • Photovoltaic systems & solar parks
  • hydroelectric power plants
  • Bioenergy plants
  • Microgrids & hybrid solutions
  • Storage systems & peak shaving systems
  • Power distribution networks with grid feed-in

Is renewable energy fed in safely?

Our transformers make it possible – with technology that reliably integrates volatile energy sources.

Power transformer brochure

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