The heat available in the solar radiation is abundant, and only 5% of the irradiance is converted into usable form. In such scenario, there should be efforts to capture more and more solar thermal content. At present, concentrating and non-concentrating types of solar thermal collectors are used to heat the fluid, which in turn supplies heat to end load. In the present study, a standard box-type solar collector is filled with paraffin wax and exposed to outdoor conditions at Nagpur, India, location. The application of box-type solar collector to store solar heat is a potential technique and capable to offer higher exergy efficiency. Box-type solar collector amplifies the net radiation falling on the collector’s glass surface; thus, it is beneficial to melting process. Though the melting process seems non-uniform (spatial), temperature data indicate that the PCM undergoes uniform heating at all location. This work aims to present some useful reference for design and development of direct heat latent heat storage to store solar thermal heat. It is a small-scale work and emphasizes to evaluate the applicability of direct heating for the above said purpose.