A mixture of methanol and water is reformed to H2 and CO2 in the equipment. Then H2 and CO2 will be guided into the Fuel Cell Stack. In the stack, the hydrogen gas is reacted with the catalyst in the anode, which is separated into electrons and protons. The protons pass through PEM to combine with oxygen and electrons in the cathode to form water vapor. The electrons go through the external circuit and form a direct current.