The solid oxide fuel cell system 10 includes a solid oxide fuel cell stack 12 and the gas turbine engine 14. The solid oxide fuel cell stacking portion 12 includes a plurality of solid oxide fuel cells (16). Gas turbine engine 14 includes a compressor 24 and turbine 26. Compressor 24 has the fuel from the cathode 22 of the oxidant ejector 60, the through supplying oxidant to the cathode 22 of the fuel cell 16, and the oxidant ejector 60 includes a fuel cell 16, cells ( the cathode 22 deulroui portion of the unused oxidant 16) to the oxidant supplied from the compressor (24). The fuel cell system 10 further includes an electric motor 66, a condenser 70 and, the thermal collector 72 is configured to drive a further compressor (64), an additional compressor (64). Compressor 24 supplies the oxidant to the additional compressor 64 via a condenser 70, an additional compressor (64) supplies the oxidant to the oxidant ejector 60 through the heat recuperator (72). The solid oxide fuel cell stack section 12 is supplied to the exhaust gas to the turbine 26, the turbine 26 is heat the oxidant flowing through the heat recuperator 72 is supplied to the exhaust gas through the heat recuperator (72) do.