The installation of on-grid-electricity-generation photovoltaic (PV) system is currently undergoing substantial growth and extension as an alternate source of energy that contributes to Malian buildings. This study presents an evaluation of a grid-connected of a 50 MW photovoltaic (PV) system installed in Kita, Mali region. The data was recorded year from 1st January to 31 December 2022 based on real time observation. The system is made up of 187,000 modules polycrystalline of 270 Wp. The assessed parameters of the PV installation include energy output, solar radiation, ambient temperature, yields, efficiencies, dust, performance ratio (PR), capacity factor and relationships between dust, yields; between dust and efficiencies. The results show that the final yield (
) ranged from 3.56 to 5.04 kWh/kWp, the performance ratio (PR) ranged from 70.99% to 75.60% and the annual capacity factor was found to be 18.07%. The study further suggests that, at the observed levels, dust accumulation does no significantly impact on PV system efficiency. The results will proffer solutions to start-up companies and individuals to install PV plants to meet the energy demands of the country.
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