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https://www.fudzilla.com/news/49241-french-solar-road-was-a-failure
A one kilometre "solar road" project paved with photovoltaic panels in France is "too noisy, falling apart, and doesn't even collect enough solar energy".
Le Monde describes the road as "pale with its ragged joints", with "solar panels that peel off the road and the many splinters [from] that enamel resin protecting photovoltaic cells".
It's a poor sign for a project the French government invested €5 million, or $5,546,750. The noise and poor upkeep aren't the only problems facing the Wattway. Through shoddy engineering, the Wattway isn't even generating the electricity it promised to deliver...
Normandy is not historically known as a sunny area. At the time, the region's capital city of Caen only got 44 days of strong sunshine a year, and not much has changed since.
Storms have wreaked havoc with the systems, blowing circuits. But even if the weather was OK it appears the panels weren't built to capture them efficiently... Solar panels are most efficient when pointed toward the sun. Because the project needed to be a road as well as a solar generator, however, all of its solar panels are flat. So even within the limited sun of the region, the Wattway was further limiting itself.
Also: Turns out a Road Made of Solar Panels Was, in Fact, a Bad Idea
(Score: 2) by Thexalon on Friday August 23 2019, @07:34PM
There was. It was installed on a sidewalk, not on an actual road, and IIRC approximately 1/3 of the units failed immediately upon installation and it never came close to generating enough electricity to even power the LEDs that were going to be lit up by it. In short, it was a complete and total failure, but for some reason they convinced people to pay lots of money for an even larger and more expensive complete and total failure.
The only thing that stops a bad guy with a compiler is a good guy with a compiler.