Instruction Manual

PowerOptimal Elon® 100 Installation Manual
Version date: 2022/05/23
Page 19 of 37
Version number: 2.20
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Appendix B. Solar yield
Note: only basic information is provided here. Your solar PV installation design engineer or technician
should advise on the best configuration for your specific location, roof structure, etc.
The yield produced by solar PV modules depends on several factors:
• Solar irradiance levels at your location (which varies with time of day, season and weather
conditions)
• Geographic features at your location (e.g. mountains or buildings causing morning or
afternoon shade)
• Azimuth and tilt of the modules
• Shading
• Ambient temperature (also influenced by wind)
B1. Solar irradiance levels
The map below shows the general solar irradiance levels (GHI or Global Horizontal Irradiance) in South
Africa
1
:
1
CRSES (Centre for Renewable and Sustainable Energy Studies). Website:
http://www.crses.sun.ac.za/files/research/publications/SolarGIS_GHI_South_Africa_width15cm_300dpi.png.
Last accessed: 07/04/2017.