Latitude Data
http://www.heavens-above.com/countries.asp#N

Ambient Temperature Data
http://www.weatherbase.com

Irradiation Data
http://energy.caeds.eng.uml.edu/fpdb/irrdata.asp

PV Panel, Charger Controller and Inverter Data
http://www.oksolar.com/

Lecture notes from the Asian Institute of Technology
http://courses.ait.ac.th/ED06.22/first.html

A solar textbook online
http://powerfromthesun.net/book.htm

Free solar design software
http://www.retscreen.net

For general information on PV panels, batteries, AC power and much more, visit – http://www.catas1.org

Data for monthly mean solar irradiation on a horizontal plane. The database contains listings from thousands of weather stations around the globe.
http://energy.caeds.eng.uml.edu/fpdb/irrdata.asp

Find out the latitude and elevations of locations around the globe, includes listings for even very small towns.
http://www.heavens-above.com/countries.asp#N

Fundamentals of the Sun as a source of power.
http://www.jxj.com/magsandj/rew/2003_05/sun.html

Free solar design software can be found here. Some excellent backup material is available in their textbook section.
http://www.retscreen.net

This site contains many spec. sheets for solar panels, batteries, inverters, charge controllers etc.
http://windsun.com
Also a very useful battery FAQ page can be found at: http://windsun.com/Batteries/Battery_FAQ.htm

An in depth scientific guide to solar power can be found here. It is a work in progress.
http://www.powerfromthesun.net/book.htm

Solar site with many articles on solar power
http://www.solarenergyvortal.coml

Many panel specification sheets can be found at this site:
http://www.oksolar.com

Go Green Directory & Online Shop. Web sites providing environmentally friendlier products and services.

:www.gogreen.cellande.co.uk