Hybrid installation with a biogas installation

A hybrid installation for providing electric energy from regenerative energy sources, comprising a biogas installation that provides electric energy, and at least one additional energy converter (64, 66), which provides electric energy and whose releasable power is depending of external influence factors, of the wind supply and/or the sun irradiation in particular, wherein the electric energy of the biogas installation and the electric energy of the at least one additional energy converter are fed into a common mains grid (76), characterised in that the biogas installation features a gas turbine (60) with an electric generator (62) which is operated by the biogas produced in the biogas installation, and whose waste heat can be supplied to the biogas installation via a heat exchanger (20), wherein a control element (86) is provided which controls the gas turbine 60 in dependence of an internally or externally given desired value (98) for the electric power of the hybrid installation and in dependence of an additional internally or externally given desired value (100) for the thermal power of the hybrid installation.