Phase change materials (PCMs) such as paraffins can be used to store thermal energy with higher energy densities than sensible heat storage materials. In technical applications a containment and an improvement of the thermal conductivity is often necessary. To meet this demands the PCM can be encapsulated in spheres made of a polymethylmetacrylate-shell with diameters of about 5 .. 20 μm. The microencapsulated PCM can be mixed with other materials to improve the thermal conductivity. For the experimental validation of heat transfer calculations and for the estimation of the actual stored amount of thermal energy of a latent heat storage system the knowledge of the transition temperature is essential. If the melting temperature is once determined by differential scanning calorimetry, it is but difficult to detect long-term alterations of the transition temperature during in-situ measurements. A measurement of the relative dielectric constant along with the temperature could avoid this drawback. The objective of the investigations presented in this paper are therefore comparative measurements of the melting temperatures of microencapsulated paraffins with the common calorimetric as well as with a dielectric method using the alteration of the relative dielectric constant at the solid-liquid phase transition. It is shown, that there is a good match of the measured melting temperatures with both methods for the microencapsulated PCM.