20 years? The Chinese panels that they're selling in this country don't last for three years oject smells of BS from top to bottom!
Bullshit. Most PV panels deployed worldwide are made in China and are high quality with 20-30 year warranties standard.
Chinese inverters are another matter...
And of course any solar panel is not going to last long embedded in a roadway nor will the power output be anywhere near optimal. So despite high quality Chinese solar panels, solar roadways of any kind remain an ill conceived boondoggle.