The　aim　of　this　study　is　to　conduct　an　in-depth　analysis　of　energetic　performance　of　a　new　two-stage　alkali　metal　thermal　electric　converter　powered　by　the　sun,　along　with　a　thermoradiative　device.　The　main　methods　are　to　establish　the　model　of　the　coupling　system　by　addressing　significant　internal　and　external　inefficiencies　and　derive　the　analytical　formulas　for　the　efficiencies　of　the　combined　device　and　three　subsystems.　The　main　contents　of　this　study　include　that　the　overall　efficiency　and　power　output　of　the　system　are　forecasted　by　taking　into　account　the　solar　concentration　ratios,　the　temperatures　of　the　converter,　the　current　density　of　the　first　stage　converter,　and　the　voltage　output　of　the　thermoradiative　device　and　the　highest　power　density　outputs,　peak　efficiency,　and　the　optimal　efficiency-power　trade-off　are　determined　for　the　varying　levels　of　solar　concentration.　The　main　novelties　are　to　obtain　the　influence　of　altering　the　ratio　of　solar　concentration　on　the　optimal　criteria　for　the　pivotal　variables　of　the　entire　system　and　establish　the　coordination　specifications　between　the　subsystems.　The　results　of　this　study　show　that　at　a　solar　concentration　ratio　of　1450,　the　optimal　power　density　and　efficiency　of　the　developed　system　can　reach　144×103　W　m−2　and　0.388,　respectively,　representing　an　increase　of　about　17.1%　and　29.8%　over　the　those　of　the　solar-driven　alkali　metal　thermal　electric　converter/Brayton　heat　engine.　The　results　confirm　that　optimal　exhaust　heat　recovery　leads　to　a　notable　performance　boost　in　the　proposed　system.　Furthermore,　the　Pareto　front　is　associated　with　the　numerical　techniques,　supporting　the　achievements　obtained.　©　2025　Elsevier　Ltd