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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
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)