A solar energy collection system having a system inlet and a system outlet, the solar energy collection system comprising: • at least two hollow radiation absorbers , each having an upstream inlet end configured for being in inlet fluid communication with a system inlet, and a downstream outlet end in fluid communication with the system outlet, each radiation absorber configured for being filled by said fluid, to absorb solar radiation impinging thereon and transform its energy into heat and to thereby allow said fluid to be heated; • an enclosure enclosing said radiation absorbers , for blocking said heat from dissipating into surrounding environment; and • a measuring device for determining at least one parameter of said fluid within each radiation absorber , which depends on the amount of heat absorbed thereby; each of said outlet ends being provided with an outlet valve (3 8) for allowing a flow of said fluid out thereof via said outlet end ; characterized in that each of said inlet ends being provided with an inlet non-return valve for allowing a flow of said fluid thereto through said inlet end , while preventing backflow therefrom; said solar energy collection system further comprises a controller configured to control the operation of each of said outlet valves at least between its open state in which said fluid can flow freely out of the associated radiation absorber , and its closed state in which the fluid filling said associated radiation absorber is held therein for a period of time depending at least on a desired change of said parameter; wherein said controller is further configured to selectively control the operation of the outlet valves such that the solar energy collection system supplies working fluid continuously. • at least two hollow radiation absorbers , each having an upstream inlet end configured for being in inlet fluid communication with a system inlet, and a downstream outlet end in fluid communication with the system outlet, each radiation absorber configured for being filled by said fluid, to absorb solar radiation impinging thereon and transform its energy into heat and to thereby allow said fluid to be heated; • an enclosure enclosing said radiation absorbers , for blocking said heat from dissipating into surrounding environment; and • a measuring device for determining at least one parameter of said fluid within each radiation absorber , which depends on the amount of heat absorbed thereby; each of said outlet ends being provided with an outlet valve (3 8) for allowing a flow of said fluid out thereof via said outlet end ; characterized in that each of said inlet ends being provided with an inlet non-return valve for allowing a flow of said fluid thereto through said inlet end , while preventing backflow therefrom; said solar energy collection system further comprises a controller configured to control the operation of each of said outlet valves at least between its open state in which said fluid can flow freely out of the associated radiation absorber , and its closed state in which the fluid filling said associated radiation absorber is held therein for a period of time depending at least on a desired change of said parameter; wherein said controller is further configured to selectively control the operation of the outlet valves such that the solar energy collection system supplies working fluid continuously. <EOS>