https://cleantechnica.com/2019/04/22/re ... he-masses/
$60 buys the 10 watt version; $30 buys 5 watts
If I was an avid camper I would try this out since it seems like it could offer a solution to keeping devices charged and provide light at night.
50 - 100 Wh a day is actually a useful amount of electricity for basic requirements. Maybe they should have shaped the panels into a hat