The easily and accurately measurable parameters of thermoelectric power and cooling modules, such as hot and cold side temperatures, voltage, and current, are automatically measured. A standard power application require the use of available thermoelectric modules made of bismuth telluride-based alloy. Two cooling models such as TEC1-12708 and MT2-1,6-127, and two power models such as TEP1-1264- 3.4 and TEG1-1260-5.1 are considered as these are capable of operation at up to and a little over 170°C. TEG1-1260-5.1 gives the highest cost per watt, because of its high price and the fact that it produced the lowest power output. The results show that the thermoelectric modules with a higher temperature difference between hot and cold sides would of course produce a proportionally higher power output. The regression lines for power output presented enable the designer to define the ultimate capacity of a thermoelectric module for use as a low-intensity power generator and define in detail the actual device required.