Key Takeaways
- Switzerland’s Sun-Ways has inaugurated the world’s first solar railway, producing around 16,000 kWh in one year.
- The project has the potential to power a significant portion of Switzerland’s energy needs if expanded across its entire railway network.
- Sun-Ways plans to expand into Italy and South Korea, with discussions underway in several other countries.
Innovating Railways with Solar Energy
Last year, Swiss start-up Sun-Ways made headlines by launching the world’s first solar railway in Buttes, Switzerland. This innovative project features 100 meters of photovoltaic (PV) panels integrated into active railway tracks. Initially designed as a three-year trial, the project’s success in its first year is prompting plans for permanent installations along the railroad.
The railway system comprises 48 specially-designed solar panels with a combined power output of 18 kWp. Despite the panels being less optimally angled than traditional installations—losing about 10 percent efficiency—the first year generated around 16,000 kWh of energy. This amount is equivalent to the annual electricity consumption of an average UK home.
Sun-Ways envisions extensive possibilities for solar railways, estimating that covering Switzerland’s 5,317-kilometer railway network could yield about one Terawatt hour (TWh) of electricity annually, potentially supplying two percent of the nation’s overall energy consumption.
However, integrating solar panels into railway infrastructure poses unique challenges. Concerns raised by the International Union of Railways regarding the safety of these installations include potential micro-cracks in the panels, increased fire risk, and possible distractions for train operators due to reflections. Sun-Ways addresses these risks with more durable panels equipped with anti-reflection technology and built-in sensors to monitor functionality. Moreover, the company reported that the pilot project has encountered no maintenance issues thus far, with electricity being fed directly into the grid.
Expanding on the successful Swiss trial, Sun-Ways has signed a collaboration agreement with an Italian partner to explore similar initiatives in Italy. A pilot project announcement is expected soon. The company has also secured governmental approval for additional solar railways in South Korea, while talks are ongoing with stakeholders in the Netherlands, China, India, and Singapore.
As Europe increasingly transitions to renewable energy, the solar railway model presents a promising avenue for sustainable transportation and energy production. The goal is to transform railway tracks into clean energy sources, marking a significant step towards greener infrastructure across the continent.
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