This chapter presents a series of applications of hybrid RESs with various generation sources and storage technologies. It illustrates how PV panels, wind turbines, batteries, fuel cells (FCs), and supercapacitors (SCs) can be combined to achieve reliable, autonomous, and efficient energy systems across different contexts. Each section explores a specific configuration, from off-grid PV-battery systems to wind turbine/flywheel hybrids, and from PV/fuel cell microgrids to PEMFC/SC systems for electric vehicles, highlighting their operating principles, control strategies, and simulation results under various conditions. The aim is to connect theoretical modeling with practical applications. Through comparative case studies, this chapter gives the significance of storage coordination, energy flow optimization, and multi-source integration in sustainable power systems. These examples are based on my own experience and on my previous works [1–24].