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This paper presents experimental assessments of the thermal and electrical performance of photovoltaic (PV) system by comparing the latent heat-cooled PV panel with the naturally-cooled equivalent. It is commonly known that the energy conversion efficiency of the PV cells declines with the increment of the PV cell temperature, at a typical value of 0.5%/K. Instead of exploring new semi-conducting materials to reduce the temperature-dependent effect, passive cell cooling is an alternative way to improve the PV power outputs. In the experiment, latent heat thermal energy storage was coupled to the rear side of the PV panel to achieve cell cooling passively. The phase change material (PCM) filled in the thermal storage containment (PCMTS) was organic based paraffin wax which has low melting point of 27 ̊C and high latent heat capacity of 184 kJ/kg. To overcome the poor thermal conductivity of the PCM …