Can anyone tell me anything about getting into the solar business? Both in sales and installation. Any recommended classes or schools? certification? I have been in the field for 30 years, have done everything but solar. licensed in maryland. Any info or help would be appreciated

If you were in Florida this is where you would start. Maybe they have a similar program in Pa.
These guys might even have some guidance for you

http://www.fsec.ucf.edu/en/

Check out anything from Sandia National Laboritories. They have a "Handbooks of Recommended Design Practices" and reprints of many well written articles. John Wiles seems to be on a crusade to bring code compliance to the PV world of backyard do-it-yourselfers. If you get the chance take a class from him.

http://photovoltaics.sandia.gov