Home      About      Contact      Submit an Item      
Passive    PV    Homes    Commercial    Wind    Projects    DIY    Resources    Tools    Materials    Hire Us    
Watch Cheap Solar Power MIT

Cheap Solar Power MIT


Watch Zephyr Solar Flight Thumbnail

Zephyr Solar Powered Flight 2008 Video


Watch Passive House German Concept

Passive House Concept Video (Germany)


  

 

 

 

Resource

Solar Position Calculator

Solar zenith angle, declination, equation of time, etc.

This calculator program returns solar zenith angle, declination, Julian day, equation of time, hour angle, instantaneous and daily extraterrestrial radiation values, and sunrise and sunset times. Equations were provided by the National Renewable Energy Laboratory.