A New Solar Resource Map for SA

At The South African German bilateral government discussions the new Solar Resource map was handed over

A New Solar Resource Map for SA


In the picture (L-R): Mr Kevin Nassiep (CEO SANEDI); Mr Thorsten Herdan (DG Energy Policy Department, German Federal Ministry for Economic Affairs and Energy); Dr Wolsey Barnard (Acting-DG South African Department of Energy; Dr Soeren David (Head of the SAGEN programme at GIZ)



Until the commencement of this project there was a general lack of measured, high-accuracy solar data in South Africa available in the public domain, especially Direct Normal Irradiance (DNI) data used for concentrating solar power (CSP) and concentrating photovoltaic (CPV) systems.

 The rationale for this GIZ funded project was to measure and release high-accuracy solar resource data into the public domain, as well as to update the existing solar maps for South Africa. In 2012, a high-accuracy solar DNI map for SA was released by GeoModel Solar. This map was a significant improvement on the previously available DNI maps from institutions such as NREL and NASA. However, the SolarGIS map still had limitations in terms of uncertainties since it was predominantly based on satellite-derived data, with only a few instances of measured data available to correct the models. In order to overcome the uncertainties, high-accuracy, groundmeasured DNI data were required. This project proposed the installation and monitoring of six, high-accuracy DNI stations with data that would be placed in the public domain. The main project objectives were:

  • To install six solar resource measurement stations, with 12 months of data to be placed in the public domain.
  • To establish a web portal where these six sets of high-accuracy solar measured data are available in the public domain.
  • To create an updated SolarGIS DNI map, based on the new data available from the six GIZ stations.

This data is now available in the public domain, the web portal and the updated solar maps here

the final report is also available here..