In this research, simulated technical and economic analysis of off-grid photovoltaic power system with back-up generators for GSM base station using PVsyst simulation software is presented. The case study load profile comprising of 9 key components has peak power demand of 3325 W and daily energy demand of 58580 Wh. The solar radiation has annual mean of 4.2041 and standard deviation of 1.6018 while the temperature has annual mean of 25.32 and standard deviation of 1.1595. There is no outlier in the solar radiation but the temperature has three outliers, which are, 21.8, 28.7, 28.8. The PV power system has 60 units of PV modules and 112 units of battery for the battery bank. There is solar fraction of 1.0 is all the months except in the month of July where the solar fraction is 0.934 which required the backup generator to supply the energy short fall of 119.4 kWh in July for a total duration of for 39.83 hours. The economic analysis results show that the installation cost according is 10,969,000 Naira while the operating cost is 940,422.08 Naira per year. The unused energy cost is 56,883 naira per kWh. The feed-in-tariff for the energy generated from the solar power system is 170 naira per kWh. The payback period for the system is 4.3 years. That means after 4.3 years, the investment cost of the project will be recovered. The return on investment is 377.7% which means the project is very profitable.
Mohammed et al. (Thu,) studied this question.
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