In the present study, a new method to investigate all output parameters of a thermoelectric module has been developed. The new method bases on the thermoemf measurement of a working module and the comparison of the results with those of classical methods. The new method is employed in investigation of the parameters of a standard thermoelectric module of Melcor with production code of CP1.0-127-05L. The theoretical results calculated by the means of new and classical methods for the parameters of an actual thermoelectric module have been compared with the experimental results, and the advantage of the new method in approximation accuracy has been proven. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.