The below picture is a moveable thermoelectric power generator prototype.It is cooled by heat sink with a fan. You can put on any top of stove heater to generate electricity. When the hot plate is at 300℃, the output power can be 20watts or 30watts, or even higher depending on number of modules and generator size. The Generator can work up to 500℃ hot surface. 

Please down load the specification from here in PDF	TEG20-12V
	TEG30-12V