**7. Results and Discussion**

In this section, the economic analysis of the HRES system without and with energy storage is considered. The proposed technique is implemented in the MATLAB/Simulink platform. In order to meet the load demand of the system, PV, WT and battery have been utilized. HOMER is a free software application developed by the National Renewable Energy Laboratory in the United States. This software application is used to design and evaluate technically and financially the options for the off-grid and on-grid power systems for remote, stand-alone and distributed generation applications. It allows considering a large number of technological options to account for energy resource availability and other variables.

Here, two case studies are considered and discussed as follows:

Case Study A: Cost worked out for the interruption period without using energy storage.

Case Study B: Cost worked out using proposed technique for the interruption period with energy storage.
