This research introduces an innovative On-Grid Hybrid Renewable Generation (OG-HRG) system characterized by its distinctive combination of three technologies: solar photovoltaic (PV), gearless Permanent Magnet Synchronous Generators (PMSG)-based wind turbines, and a Flywheel Energy Storage System (FESS). The particularity of this system lies in its advanced incorporation of a multi-layered control approach, which merges the adaptability of Fuzzy Logic Control (FLC), the accuracy of Proportional-Integral-Derivative (PID) control, and the resilience of Sliding Mode Control (SMC) into a unified Energy Management System (EMS). This design has been specifically developed to address intermittency and maintain grid stability. Simulation outcomes validate its effectiveness, showcasing 92.3% renewable energy utilization, minimal frequency fluctuations (±0.8%), and an 85% decrease in CO₂ emissions. This study offers a new framework for achieving high-efficiency and stable integration of renewable energy sources.