Buttes, Val-de-Travers, Canton of Neuchâtel, Switzerland

The first removable inter-rail PV system on a line open to traffic. In April 2025, Sun-Ways installed 48 panels (~18 kW) along a 100 m active stretch near Buttes, Neuchâtel, using a Scheuchzer track machine that unrolls preassembled modules at ~300 m/hour. A three-panel, 6 m module can be detached and disconnected in ~10 minutes for maintenance. After one year (reported July 2026), the system had survived 11,000+ train passages at speeds up to ~90 km/h with no glare or interference reported by operator transN, and produced ~16,000 kWh fed into the ordinary grid. The three-year pilot runs through April 2028; SNCF Réseau is monitoring maintenance impacts.