The first micro-CHP unit operated with a gas-fired combustion engine offering an output especially designed for use in one- and two-family homes. The electric output is 1 kW, thermal output 2.5 kW. The system offers an electric efficiency of 26.3% at an overall efficiency of 92%. Up to 80% of the own power consumption can thus be covered with electric power generated by the unit. The unused electricity can be fed into the public grid. Therefore, the owner receives a government fixed compensation.