Einfach verstehen wie Photovoltaik weiterhilft...
https://www.youtube.com/watch?v=GWAmIRvaHRQ  PV iTeach for Photovoltaic Applicantion

PV iTeach Video-Einführung in die PV

"PV-iTeach" an inspirational project for every PV enthusiast

PV iTeach offers training courses for people who want to learn, free of charge. Charge yourself!

Some engineering background ease the learing process of any student

The project PV iTeach

Introduction in YouTube: https://www.youtube.com/watch?v=GWAmIRvaHRQ

Introduction in thermal solar use https://www.youtube.com/watch?v=uPU86pXbOpo (Freiburg Fraunhofer ISE)