Background : To increase the country's energy production, the State of Niger has built a 7MW photovoltaic solar power plant connected on grid of the Nigerien electricity company in the department of Malbaza, Tahoua region (130 58'3.54 ”North and 5031'11.95 " East). Objective: In order to analyze the operation of this plant, a study of energy production was carried out in this article. Methods: The study was based on data on energy production as a function of irradiation and temperature from January 1, 2019 to December 31, 2019. A comparative study was first carried out between the monthly energy production of the plant and those established by the designer with the Pvsyst software on a provisional basis. The comparative study was then made between the monthly energy productions of the power plant and those obtained by simulation on the Pvsyst software using the irradiations and the actual temperatures of the site and the same inclination of the modules. Results: The first study showed that the statistical values of the Mean Bias Error (MBE), of the Mean Absolute Bias Error (MABE) and of the Root Mean Square Error (RMSE) of the monthly energy productions are respectively 62.1MWh, 69.150MWh and 91.722MWh with a mean percentage error (MPE) of 6.575% and a correlation coefficient of 36.28%. But the low correlation coefficient of 21.49% for the irradiation did not allow any conclusion to be drawn on the correct functioning of the system. For the second study, the values of MBE, MABE and RMSE obtained are respectively 60.096MWh, 92.975MWh, 123.591MWh with an MPE of 5.811% and a correlation coefficient of 70%. Conclusion: These results show an acceptable operation of the plant.
