Patent ID: 8836162

Claim:
Inverter ( 1 ) for solar panels ( 4 ), comprising at least two inverter inputs ( 7 . 1 , 7 . 2 ) to each of which a group of solar panels can be connected, and an inverter output ( 8 ) to which a network can be connected, an inverter element ( 3 ) with a direct voltage input ( 8 ) and an alternating voltage output ( 10 ) which converts a direct voltage which is connected to its direct voltage input ( 8 ) into alternating voltage and sends it to an inverter output ( 9 ), an electronic control system ( 5 , 6 ) which monitors the direct voltage which is connected to the direct voltage input ( 8 ) of the inverter element ( 3 ) and at least one of a network voltage and a network frequency of the network which is connected to the inverter output ( 9 ), a switching system (K 1 , K 2 ) which is electrically arrayed between one of the at least two inverter inputs ( 7 ) and the direct voltage input ( 8 ) of the inverter element ( 3 ), wherein the at least two inverter inputs ( 7 . 1 , 7 . 2 ) of the inverter ( 1 ) are connected in series with the direct voltage input ( 8 ) of the inverter element ( 3 ), wherein the electronic control system is designed so that it activates the switching system (K 1 , K 2 ) to disconnect the at least one inverter input ( 7 . 2 ) of the inverter ( 1 ) from the direct voltage input ( 8 ) of the inverter element ( 3 ) if the voltage which is connected to the direct voltage input ( 8 ) of the inverter element ( 3 ) exceeds an upper threshold value and/or if the network voltage and/or the network frequency lies outside a previously specified normal voltage or normal frequency range, wherein the switching system includes a switching element (K 2 ) which is triggered by the electronic control system to disconnect the at least one inverter input ( 7 . 2 ) of the inverter ( 1 ) from the direct voltage input ( 8 ) of the inverter element ( 3 ) if the voltage which is connected to the direct voltage input ( 8 ) of the inverter element ( 3 ) exceeds an upper threshold value, and wherein the switching element (K 2 ) is electrically arrayed between one ( 7 . 2 ) of the at least two inverter inputs ( 7 . 1 , 7 . 2 ) and the direct voltage input ( 8 ) of the inverter element ( 3 ) so that it short-circuits this inverter input ( 7 . 2 ) to disconnect this inverter input ( 7 . 2 ) from the direct voltage input ( 8 ) of the inverter element ( 3 ).