France Tests Solar Panels on Active Railway Tracks

Imagine if every mile of railroad track could double as a solar power plant. That future just moved closer to reality.

Sun-Ways, a Swiss startup, has created the world's first removable solar panel system designed specifically for active railway lines. The company installed 48 solar panels along a 100-meter stretch of track in Buttes, Switzerland, and France's national rail operator SNCF immediately signed on as a partner to study the results.

The pilot system went live in April 2025 and will run tests through 2028. The panels generate 18 kilowatts of power and are expected to produce 16,000 kilowatt-hours annually, enough to power several homes.

What makes this breakthrough special is the removable design. Traditional solar installations are permanent, but Sun-Ways created panels that railway crews can quickly remove for track maintenance and reinstall just as easily. This solves one of the biggest challenges of putting solar panels anywhere near active infrastructure.

SNCF is getting full access to all the performance data, including how the panels handle dirt buildup, whether they create glare problems for train operators, and how they interact with existing railway equipment. The French railway operates over 18,000 miles of track, representing massive potential for clean energy generation if the technology proves viable.

The pilot tests everything from installation speed to energy output in real weather conditions. Railway maintenance teams are also evaluating whether the panels interfere with their regular track inspections and repair work.

The Ripple Effect

Railways own some of the most underutilized real estate on the planet. Thousands of miles of track sit in direct sunlight every day, doing nothing but supporting trains. If this technology scales, rail networks worldwide could transform from energy consumers into energy producers.

Switzerland's regional rail company TransN is hosting the pilot on Line 221, giving researchers access to real train traffic and actual operating conditions. The three-year timeline ensures the panels face every season and weather pattern multiple times.

For SNCF, the stakes are enormous. France has committed to aggressive carbon reduction targets, and finding new sources of renewable energy remains a national priority. Converting even a fraction of the country's rail network into solar generators could provide clean power to nearby communities while reducing the railway's own energy costs.

The beauty of this approach is its efficiency. The land is already cleared, already owned by the railway, and already maintained regularly. No forests need clearing and no farmland gets converted.

If the pilot succeeds, expect to see solar panels appearing on railway tracks across Europe and beyond.