PAWI Winterthur Puts New Photovoltaic System into Operation

Roof renovation meets energy transition

Over the course of seven months, the three large roof areas of the production and warehouse halls were completely renovated, sealed, and fitted with state-of-the-art insulation. At the same time, the technical foundation for a powerful solar system was put in place.

The result: more than 1,200 PV modules covering an area of around 2,500 m², now feeding electricity directly into the factory grid.

Technical highlights at a glance

• More than 1,200 PV modules, each measuring 1800 x 1134 x 30 millimeters
• Four high-performance inverters converting solar energy into usable electricity
• Orange power cables (Ø 5 cm) as the “lifelines” between the roof and the transformer station
• In-house power production since 01.10.2025 – a milestone for greater independence and sustainability

Teamwork across all rooftops

This project was a true team effort: Theo Huber AG provided scaffolding, Maillard Bedachungen handled the renovation, sealing, and metalwork, while ELPAG took care of drilling, cable routes, and the connection to the transformer station. CKW was responsible for installing the PV system. And of course, an internal project team worked tirelessly on coordination, communication, and even parking management.

The fact that all this was accomplished during ongoing production makes the result even more impressive. A long period of rain, extreme heat, and tight construction schedules were challenges that could only be overcome through close collaboration and a great deal of flexibility.

A win for both environment and business

With this investment, we are making another active contribution to the energy transition while also strengthening our economic independence. The system will reduce our CO₂ footprint in the long term, lower energy costs, and increase supply security. On top of that, our roofs are now better insulated, safer to access, and partially renewed skylights bring more natural light into our production halls.