http://Solar energy is a topic of great interest to many in the international Energy Industry. We have compiled a list of useful non-commercial websites hopefully you will find it a useful source in your solar energy exploration. It is an evolving list based on feedbacks we receive from you and industry experts.
Iran's Power Distribution Equipment Identification (PDEID) Application Guide (in Persian prepared by Ghods Niroo Engineering Co. for TAVANIR)
Useful information to know
Power Distribution Equipment Identification (PDEID) is a unique identification label used for exclusively identifying equipment and customers of the power distribution network of Iran, which has been in use since 1997.
edXⓇ publication for Solar Energy Fundamentals, Technology, and Systems
Electrical Design Calculators
jCalc.NET is a useful website for electrical design calculations