Inter-Comparison of Solar Radiation from Different Data Sources: Case of Some Algerian Sites

Many studies have been conducted in recent years, dealing in general with solar energy assessment in Algeria and solar radiation evaluation in particular. In our study, an intercomparison of different sources of solar radiation we have used in previous studies was achieved. In fact, as an input, data obtained from PVGIS database, from modelling using Angström-Prescott relation and from RETScreen® software database were used in order to perform the comparison. Meanwhile, for the validation, measured data for five (05) locations across the country were used in order to make comparison to those given by PVGIS, RETScreen® and Angstrom model. The confrontation showed that data contained in the RETScreen® database fits the best among others. The present contribution could give an important information and feedback, for future investments in the solar sector in the country. In fact, recently, the government within the framework of the Algerian programme for renewable energy has increased its goal concerning the electricity production from renewable, which is now set to 25,000 Megawatts to be installed by 2030, with 13,575 MW of capacity for solar photovoltaic. Therefore, a reliable assessment is needed to be carried out before achieving any solar plant.