We encourage you to browse the following list of recommended resources:
Solar Energy International (SEI): Online Courses. Features a variety of offerings, from PV System Fundamentals (Battery Based) to Advanced PV System Design and the NEC (Grid-Direct). Each course description includes NABCEP certification information. While on the SEI site browse list of hands-on trainings as well.
NABCEP: Certification. Details the benefits of certification, provides information about certification exams, and outlines the different types of certification available (PV Technical Sales, PV Installation Professional, etc.)
PV Watts Calculator: from the National Renewable Energy Lab (NREL), this tool allows homeowners, small building owners, installers and manufacturers to easily develop estimates of the performance of potential PV installations.
Solar America Board for Codes and Standards Temperature Guide: Access the weather data necessary to install code-compliant PV systems. The ambient design temperatures have been provided by ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers).
Do you know of additional resources our solar community would find helpful? If so, please send your ideas to firstname.lastname@example.org - thanks!