A year later, it has been such a success that her neighbors are already asking about her

Solar electricity can be generated right under the wheels of a train without posing any risk. Switzerland has just confirmed this in a project that, after a year of having startedhas shown that the idea works, and is now beginning to arouse interest in France, Italy and Asia as well.

What has happened? In April 2025, the startup Sun-Ways installed photovoltaic panels between the rails of a 100-meter section in the town of Buttes, in the canton of Neuchâtel, Switzerland, resting on the sleepers. They claim that it is the first installation of this type in the world, and its particularity is that the modules can be easily removed when maintenance work needs to be done on the track.

Twelve months later, more than 11,000 trains have passed over the panels without any incidents being recorded. “We have achieved our objectives, both in terms of railway safety and electricity production,” explained Joseph Scuderi, founder of Sun-Ways, told Swissinfo.

Why is it relevant? The main obstacle to renewables is no longer just technological, but also space. And it is necessary to find land to install panels without invading crop fieldsforests or protected landscapes begins to be a complicated task. Spain knows this debate well, with projects such as the Maestrazgo renewable macroparkwhich has generated friction due to its visual impact. This proposal presents an alternative taking advantage of an infrastructure that already exists and is hardly used for anything else.

In detail. The energy generated is poured into the local electrical grid and, according to data provided by Sun-Ways, the installation has produced more than 16,000 kWh since May 2025, despite a one-month break due to snow and technical work. That figure is equivalent to the annual consumption of three or four households. Extrapolated to the nearly 5,320 kilometers of tracks that the country has, discounting tunnels and sections with little sun, Sun-Ways calculates that the entire Swiss railway network could generate up to 1,000 million kWh per year, around 2% of national electricity consumption.

Between the lines. Two of the biggest fears surrounding this system have been dispelled during testing. The first, the accumulation of dirt on the panels. Scuderi had initially thought of cleaning them with a brush installed at the back of a train, but discovered that the very passage of the convoys, which travel up to 90 km/h on that section, generates a current of air that carries dust. The second, the possible dazzling of the train drivers, which has not materialized either. And TransN, the public operator that manages that line, has assured that it has not received any report from its staff in this regard.

The company itself also confirms that there have been no conflicts with infrastructure, maintenance or train circulation.

The other plus point: installation is quick. The panels, patented by Sun-Ways, are placed using a machine developed together with the railway company Scheuchzer, capable of laying up to 300 meters of panels per hour, according to collect Electrek. And when it is necessary to remove them to repair a track or change a sleeper, disassembling a module with three panels and six meters in length takes about ten minutes, according to reports. detailed Scuderi.

The pending challenge. Julien Pouget, professor at the Valais University School of Applied Sciences (HES-SO), warns that transporting the electricity generated over long distances continues to be complicated, since current technology does not allow it to be done efficiently in sections greater than 500 meters, which is why a specific electrical architecture is needed to raise the voltage, as explained to the Swiss newspaper 24Heures. Together with other HES-SO researchers and Scuderi himself, Pouget intends to present a possible solution to this problem at a conference in Paris next August.

And now what. The project has caused interest internationally. And the French railway company SNCF, which manages some 28,000 km of tracks and has set the goal of covering 20% ​​of its energy consumption with solar energy by 2030, signed in February a technical cooperation agreement with Sun-Ways. In Italy, the startup is in contact with Rete Ferroviaria Italiana to organize a pilot before the end of the year, while in South Korea already there is an approved government project near the Osong station, and in Indonesia a solar engineering company is closely following the results obtained in Switzerland.

Scuderi, for his part, hopes to shorten the three-year trial period set by the Swiss Federal Transport Office and obtain final approval as soon as possible, allowing, he says, his partners abroad to also advance.

Images | Jean-Christophe Bott and Sun-Ways

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