A machine for washing items of various kinds includes a washing tub for containing the washing liquor, and a reactor for generating heat for heating up the washing liquor and a stream of gaseous hydrogen supplying a fuel cell to generate a source of electric power. In the interior thereof, the reactor contains a mass of metals, which may include magnesium, and produces a stream of gaseous hydrogen. The machine further includes a source of water that is let into the reactor to trigger the reaction process producing the hydrogen, a fuel cell that receives the stream of hydrogen and converts it into electric power, an electric connection adapted to transfer the electric power generated by the fuel cell to a controller and an actuator include in the machine, and heat transferring device for transferring the heat generated by the reactor to the washing liquor. In the interior thereof, the reactor includes a first heat exchanger for transferring the heat being generated therein to the washing liquor contained in the washing tub of the machine.