The Solar Stratos is record breaking test aircraft that uses solar power aimed to reach up to 82,000′ with a Propeller. This is U2 / SR-71 Altitude territory. The first flight was in 2017 and the is from Switzerland.

Yanko Design has a detailed article on the aircraft: https://www.yankodesign.com/2018/07/07/stratospheric-flight-without-a-drop-of-fuel/

The website for the aircraft is: https://www.solarstratos.com/en/

This aircraft could lead to new developments and a “tech refresh” in Solar powered UAV’s that could serve as an alternate to satellites.

Instagram: https://www.instagram.com/solarstratos/

Facebook: https://www.facebook.com/SolarStratos

I could find no RC, Books or Merch for the aircraft however the rctestflight channel has a 16 video series on solar powered RC aircraft.