Irradiation and PV array energy output, cost, and optimal positioning estimation for South Africa

Abstract

Simulation results of an irradiation and PV array performance software package (SunSim) are pre-sented. South African irradiation data availability is discussed, an irradiation data classification system proposed, and the estimation of diffuse irradiation on tilted surfaces analysed. Estimation of PV array energy output using King’s performance model is explained, and the influence of the irradiation and temperature data set measurement interval on PV energy output estimation investigated. Simulation results are presented, aimed at identifying optimal fixed PV panel tilt angles and solar-tracking config-urations for different locations in South Africa. Lastly, the cost of PV-based generation in South Africa is investigated.