ABSTRACT: Photovoltaic/Diesel hybrid off-grid systems provide an effective solution to power supply demands for isolated and remote areas far from grid connections. With the rapid growth in renewable energy systems, the work here presents an optimization model of Photovoltaic/Diesel hybrid system to power a hospital in Abuja. A methodology is developed for calculating the correct size of a photovoltaic hybrid system and for optimizing its management. The simulation was done using HOMER and PVSyst find the optimum combination and sizing of the components.Based on electricity demand profiles and current costs, the analysis shows a payback time is still too long. However, with the declining costs of photovoltaic technology predicted for the next few years and the continuously increasing costs of diesel, the hybrid system tends to become economically viable.

Keywords: Renewable Energy, Hybrid System, Off-grid Electrification, Optimization Methods, Energy System Design, HOMER