HOMER Energy Support

Solar Data Use

Last Updated: Jul 25, 2016 02:14PM MDT

Hourly result Table there are two coulms namely solar radiation and incidence solar.It means we have to use solar radiation data as input and Homer will convert it into icidence radiation according to the slope,latitute,longitute of the site, wherefrom the data are collected


In that table, the ‘solar radiation’ is the global solar radiation on the horizontal surface, whereas the ‘incident radiation’ is the global solar radiation on the PV panel.  If the PV panel is horizontal, the two will be equal, but if the PV panel is sloped then the two numbers will usually be different.  Yes, HOMER calculates the incident radiation from the solar radiation, the PV orientation, and the latitude and longitude.  An article in the Help system explains how, but I just noticed that it does not appear in the index like it should.  To see the article, please look up ‘PV output’ in the index, then click on the link labelled ‘solar radiation incident on the PV array’.


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