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This paper report the results of experimental study for electrofreezing of a salt hydrate-based phase change material CaCl2.6H2O to reduce the supercooling effect.The experiment was performed by using DC voltage and 0.3 mm diameter of copper electrode. The time-dependent temperature is was measured using thermocouple data logger which is connected to a computer. The parameter variation consist of the magnitude of applied electric field and interval time for field application. It turns out that the minimum amplitude of applied field is about 700 V, and the supercooling degree tend to decrease with the increase of applied field. The supercooling degree also changed with the interval time for the applied field, although its variation still need to be further clarified. From this experiment, it can be concluded that DC voltage affects the supercooling degree of CaCl2.6H2O and help to create the nucleation process.