For the first time in Poland, a power generation unit equipped with a simultaneous combustion system for natural gas and biogas has been launched. The cogeneration system is equipped with a SGE 56HM + unit and the latest generation Energo-R steam recovery boiler with a multi-stage heat recovery system from the engine block and from exhaust gases. The unit was incorporated into the heating system through a high-capacity heat accumulator and the electric energy output system was equipped with a "power guard", adjusting the amount of electricity to the current needs of the plant. The system has already worked for more than 2500 hours, confirming its high flexibility and extremely high efficiency.