Diesel generators are the indispensable generation mode for most of the off-grid operations in countries that have humid and dry climate conditions. Greenhouse gas emission is higher for the diesel plants compared to natural gas in their main grid scenario. Oman, having high solar irradiance, is trying to improve the penetration of solar electricity to replace natural gas from the grid or diesel generators, especially. This study models various scenarios involving PV, diesel generators, fuel cells, electrolyzers, and hydrogen tanks using HOMER Pro. The hydrogen produced by utilizing the excess energy involved in the renewable energy system is collected for the generation of green hydrogen. We compared the results across different scenarios. In the current market scenario, we found that the PV/fuel cell/DG is expensive in terms of the payback period. However, they effectively neutralize CO₂ emissions. Among the cases considered, we found the PV/DG combination to be more effective, with a simple payback period of less than 7 years. Advanced cost-effective techniques adopted in the fuel cell technologies will improve the viability of the PV/FC/DG combinations in the near future.