Thermal solar system having: a solar collector array having a plurality of solar collectors, wherein the solar collector array defines a solar collector fluid passage for conducting a fluid, so that the fluid can be supplied a first heat quantity from solar radiation impinging on the solar collectors, and wherein the solar collector fluid passage comprises a first fluid feed connection for fluid to be heated to be fed into the solar collector fluid passage and a first fluid discharge connection for discharging heated fluid from the solar collector fluid passage; a gas turbine with an exhaust gas outlet; an exhaust gas heat exchanger with an exhaust gas passage, which is connected to the exhaust gas outlet of the gas turbine for conducting hot exhaust gas of the gas turbine through the exhaust gas passage, and a heat exchanger fluid passage for conducting a fluid, so that the fluid can be supplied with a second heat quantity from the exhaust gas flowing through the exhaust gas passage, wherein the heat exchanger fluid passage comprises a second fluid feed connection for feeding heated fluid into the heat exchanger fluid passage and a second fluid discharge connection for discharging heated fluid from the heat exchanger fluid passage; a hot fluid receiving device, which is directly fluidically connected to the first fluid discharge connection and which, bypassing the solar collector fluid passage, directly fluidically connects the second fluid discharge connection to the first fluid discharge connection and because of this the solar collector fluid passage and the heat exchanger fluid passage are connected in parallel; a consumer device having a fluid inlet, which is connected to a hot fluid receiving device, so that at least one part of the first and second heat quantities (Q1, Q2) can be fed to the consumer device via a fluid; and an electronic control device with control algorithm in the form of software, firmware and/or hardware which is connected to the gas turbine and which is equipped to control an operation of the gas turbine as a function of a magnitude of the first heat quantity. a solar collector array having a plurality of solar collectors, wherein the solar collector array defines a solar collector fluid passage for conducting a fluid, so that the fluid can be supplied a first heat quantity from solar radiation impinging on the solar collectors, and wherein the solar collector fluid passage comprises a first fluid feed connection for fluid to be heated to be fed into the solar collector fluid passage and a first fluid discharge connection for discharging heated fluid from the solar collector fluid passage; a gas turbine with an exhaust gas outlet; an exhaust gas heat exchanger with an exhaust gas passage, which is connected to the exhaust gas outlet of the gas turbine for conducting hot exhaust gas of the gas turbine through the exhaust gas passage, and a heat exchanger fluid passage for conducting a fluid, so that the fluid can be supplied with a second heat quantity from the exhaust gas flowing through the exhaust gas passage, wherein the heat exchanger fluid passage comprises a second fluid feed connection for feeding heated fluid into the heat exchanger fluid passage and a second fluid discharge connection for discharging heated fluid from the heat exchanger fluid passage; a hot fluid receiving device, which is directly fluidically connected to the first fluid discharge connection and which, bypassing the solar collector fluid passage, directly fluidically connects the second fluid discharge connection to the first fluid discharge connection and because of this the solar collector fluid passage and the heat exchanger fluid passage are connected in parallel; a consumer device having a fluid inlet, which is connected to a hot fluid receiving device, so that at least one part of the first and second heat quantities (Q1, Q2) can be fed to the consumer device via a fluid; and an electronic control device with control algorithm in the form of software, firmware and/or hardware which is connected to the gas turbine and which is equipped to control an operation of the gas turbine as a function of a magnitude of the first heat quantity.