**4. Conclusions**

This chapter presents detailed work conducted on hybrid system based on PV and Wind. The chapter systematically shows the different methodology used in the design, simulation, optimization and techno-economic aspects of PV-Wind Systems. Some design and application of the hybrid PV-Wind are discussed.

Hybrid renewable energy power system optimal design includes feasibility studies, model-based design, simulation and integration of several hybrid renewable energy resources, energy conditioner, and hybrid energy storage system and hybrid controller for automation to achieve power supply reliability. A hybrid renewable energy system (HRES) technology for reliable power supply has challenges in the design process. Thus, hybrid energy harvester, energy conditioner, energy storage and controller feasibilities, selection and unit sizing, and system configurations are necessary procedures to be carried out. Hybrid energy system components for power, reliability applications related to hybrid energy systems, power system has been reviewed above. In order to highlight the merits of the optimal design of hybrid energy system with a promising sustainable solution for power supply reliability.

The solar photovoltaic flat plate has of enormous adaptable models with the adequate alternative energy potential that could possibly replace conventional fossil fuel system. Application of the best possible of hybrid SPV plate/PEMFC resources, boost maximum power point tracking, integrated multi-level inverter and the hybrid PEMFC-Na\_S battery storage, and micro hydropower system yields reliable electricity supply for rural and remote areas.

Hybrid renewable energy power system can offer socio-economic return when enough power is available in rural areas as business activities is going to be established as the communities do some corn/wood mills, small scale industrial ventures to engage more youth in entrepreneurship.
