Is there any clean energy challenge around internet where I can win solar panel as a prize.
Not currently.
It might make an attractive prize for some future contest.
You can check the Solar Decathlon challenges. It is hosted by the US department of Energy. I am not sure if the offer solar panels as prizes, but the provide support for further sustainable projects.
https://www.solardecathlon.gov/past/design/2024
In case you need info about the wattage calculation of solar panels, you can check this write-up.
https://www.theengineeringprojects.com/blog/tag/solar-panel
