Global horizontal irradiation is the most important parameter for evaluation of Solar energy potential of a particular region and the most basic value for PV simulations.The maps are free for public use, their reproduction and adaptation is authorised provided the following source is acknowledged: SolarGIS © 2015 GeoModel Solar Must know facts about Solar Batteries… Continue reading Solar Power in South Africa Part 2: Battery Basics, Living with Solar in Gauteng, South Africa.