Is it possible to produce 12 volts with a thermopile?

Yes, it is possible to produce 12 volts with a thermopile, but it typically requires multiple thermoelectric junctions connected in series. A thermopile generates a voltage based on the temperature difference between its hot and cold junctions, and the total output voltage will depend on the number of junctions and the temperature gradient. However, achieving a consistent 12 volts may necessitate significant temperature differences and careful design.