A microgrid is a self-sufficient electrical network composed of multiple distributed energy sources and loads, designed to serve specific applications or localized regions. Power electronic converters play a crucial role in microgrids by enabling the integration of diverse energy sources and loads with varying power and voltage levels to the standard bus. Modern microgrids commonly incorporate renewable energy sources such as wind, solar photovoltaic (PV) systems, and fuel cell–based energy conversion units. Among the essential components, DC–DC converters are indispensable for voltage regulation and power management. The Quadratic Boost Converter (QBC) is a single-switch, high–voltage-gain DC–DC converter particularly suited for renewable energy applications. This study investigates the use of a Sliding Mode Controller (SMC) to enhance energy extraction from a solar PV system interfaced through a QBC. In addition, the effectiveness of the QBC combined with an SMC in regulating the load voltage—when interfacing the load with the microgrid bus—is examined. The dynamic modelling of the system is developed from first principles, and the proposed configuration is validated through MATLAB/Simulink simulations and experimental tests.