An inverter apparatus , wherein the inverter apparatus comprises a plurality of protection units and a plurality of inverter units ; each of the plurality of protection units comprises an input terminal, an output terminal, and a control terminal, each of the plurality of inverter units comprises a direct current input terminal and an alternating current output terminal, the input terminal of each protection unit is configured to connect to one of a plurality of direct current source units in a power supply system , the output terminal of each protection unit is connected to the direct current input terminal of one of the plurality of inverter units , and the alternating current output terminal of each inverter unit is configured to connect to a power grid ; any one of the plurality of protection units is configured to: when a voltage at the input terminal of the any protection unit is greater than a voltage at the output terminal of the any protection unit , a path between the input terminal of the any protection unit and the output terminal of the any protection unit is in a forward conducted state ; when a voltage at the output terminal of the any protection unit is greater than a voltage at the input terminal of the any protection unit , a path between the input terminal of the any protection unit and the output terminal of the any protection unit is in a reverse cut-off state; or when the control terminal of the any protection unit receives a first trigger signal, a path between the input terminal of the any protection unit and the output terminal of the any protection unit is in a reverse conducted state, characterised in that the input terminals of the plurality of protection units are configured to connect to a same energy storage system . each of the plurality of protection units comprises an input terminal, an output terminal, and a control terminal, each of the plurality of inverter units comprises a direct current input terminal and an alternating current output terminal, the input terminal of each protection unit is configured to connect to one of a plurality of direct current source units in a power supply system , the output terminal of each protection unit is connected to the direct current input terminal of one of the plurality of inverter units , and the alternating current output terminal of each inverter unit is configured to connect to a power grid ; any one of the plurality of protection units is configured to: when a voltage at the input terminal of the any protection unit is greater than a voltage at the output terminal of the any protection unit , a path between the input terminal of the any protection unit and the output terminal of the any protection unit is in a forward conducted state ; when a voltage at the output terminal of the any protection unit is greater than a voltage at the input terminal of the any protection unit , a path between the input terminal of the any protection unit and the output terminal of the any protection unit is in a reverse cut-off state; or when the control terminal of the any protection unit receives a first trigger signal, a path between the input terminal of the any protection unit and the output terminal of the any protection unit is in a reverse conducted state, <EOS>