This technical paper proves the design concept of applying a double-passed photovoltaic thermal solar air collector with metal foam fins and phase change materials (PCM) honeycomb integrated thermal storage for solar thermal collector systems performance and analysis. The objectives are to optimize the collector’s thermal efficiency by integrating metal foam fins and honeycomb structure with PCM to enhance heat storage capacity, and to assess the collector’s performance with and without the incorporation of paraffin wax and honeycomb matrix in the lower channel. A comparative analysis of the double-pass photovoltaic thermal solar air collector with the integration of paraffin wax and honeycomb matrix is performed. Thermal efficiency, heat storage capacity, and overall energy output are assessed under different operating conditions. This comparative analysis provides insights into the impact of the honeycomb-PCM integration on the collector’s ability to store and release thermal energy efficiently. The findings of the work contribute valuable information for the design optimization of solar air collectors, offering a sustainable and efficient solution for harnessing solar energy. The integration of honeycomb structures and paraffin wax as a phase change material in a solar air collector has been proven to enhance performance and thermal storage capabilities.