A circuit arrangement for picking up electric power from multiple module strands (Mx) comprising power supply modules, wherein the module strands (Mx) each provide an individual module strand power (P Gx), an individual module strand current (I Gx) and an individual module strand voltage (U Gx); wherein - at least one first electric potential point of each of the module strands (Mx) is located at a common first output potential point of the circuit arrangement; - an adapter circuit (10; 10') of the circuit arrangement has multiple separate inputs (X1.x) that adjoin a second electric potential point of each of the module strands (Mx); - the adapter circuit (10; 10') is designed to control an output voltage (U WR) at the output thereof via an adapted second output potential point such that - an output current (I WR) of the adapter circuit (10; 10') corresponds to the sum of the individual module currents (I Gx) with a maximum deviation of 5% and - the output voltage (U WR) of the adapter circuit (10; 10') is between the highest individual module strand voltage (U Gx) and the lowest individual module strand voltage (U Gx); - the adapter circuit (10; 10') has a module strand switch (S2x*) for each of the module strands (Mx), by means of which switch the second electric potential point of each of the module strands (Mx) can be made to adjoin one of two different internal potential points (Xi1, Xi2) of the adapter circuit (10; 10'); and - the adapter circuit (10; 10') is designed in such a way to control the potential of the adapted second output potential point by means of the potentials of the two internal potential points (Xi1; Xi2). - at least one first electric potential point of each of the module strands (Mx) is located at a common first output potential point of the circuit arrangement; - an adapter circuit (10; 10') of the circuit arrangement has multiple separate inputs (X1.x) that adjoin a second electric potential point of each of the module strands (Mx); - the adapter circuit (10; 10') is designed to control an output voltage (U WR) at the output thereof via an adapted second output potential point such that - an output current (I WR) of the adapter circuit (10; 10') corresponds to the sum of the individual module currents (I Gx) with a maximum deviation of 5% and - the output voltage (U WR) of the adapter circuit (10; 10') is between the highest individual module strand voltage (U Gx) and the lowest individual module strand voltage (U Gx); - an output current (I WR) of the adapter circuit (10; 10') corresponds to the sum of the individual module currents (I Gx) with a maximum deviation of 5% and - the output voltage (U WR) of the adapter circuit (10; 10') is between the highest individual module strand voltage (U Gx) and the lowest individual module strand voltage (U Gx); - the adapter circuit (10; 10') has a module strand switch (S2x*) for each of the module strands (Mx), by means of which switch the second electric potential point of each of the module strands (Mx) can be made to adjoin one of two different internal potential points (Xi1, Xi2) of the adapter circuit (10; 10'); and - the adapter circuit (10; 10') is designed in such a way to control the potential of the adapted second output potential point by means of the potentials of the two internal potential points (Xi1; Xi2).