The increasing adoption of photovoltaic (PV) systems demands innovative DC-DC power conversion solutions. This thesis focuses particularly on micro-grid systems and standalone PV modules, where traditional array connections are unavailable, generating the need for high step-up requirements with wide input voltage variations. The analysis, design, and simulation of a novel DC-DC power converter with a Partial Power Processing (PPP) architecture is presented, designed to operate over a wide input voltage range (15–43 V) and deliver constant output voltage (350 V) across a broad power range (50–680 W), accommodating the variability of PV energy sources. To overcome efficiency bottlenecks in DC-DC stages for single-phase grid-tied PV systems, this thesis introduces the exploitation of Partial Power Processing through a dual stage quadratic converter with Input-Parallel Output-Series (IPOS) topology, offering high performance by allowing part of the power to flow directly to the load, bypassing the converter stages.