Europe is experiencing a renewable energy surge, with Swiss startup Sunways transforming railway lines into mini solar power plants. Last year, the company introduced the world’s first solar-powered railway in Butte, Switzerland, installing 100 meters of photovoltaic (PV) panels between railway tracks. Originally a three-year trial with 48 specially designed solar panels generating 18 kWp, the successful initial results may lead to a permanent installation.
Sunways’ research indicates that while the lack of a slope may cause about 10% energy loss, the project still generates around 16,000 kWh annually, equivalent to the energy consumption of a typical UK household. If expanded across Switzerland’s 5,317-kilometer railway network, it could potentially produce 1 terawatt hour (TWh) of electricity yearly, meeting about 2% of the country’s energy needs.
Challenges include potential micro-cracks in solar panels leading to fire hazards and driver distractions. However, Sunways addresses these with durable panels, anti-reflection filters, and sensors for effective monitoring, stating that the pilot project has had no operational issues thus far. Electricity generated is currently fed directly into the grid, with plans to redirect it for railway use in the future.
Following their Swiss success, Sunways signed a partnership with Rete Ferroviaria Italiana for a new pilot project in Italy and received approval for another solar railway in South Korea. Discussions are ongoing with partners in the Netherlands, China, India, and Singapore.
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