A photovoltaic inverter, comprising: a box; and an inverter cabinet configured to provide two or more inverter units, a direct current cabinet configured to provide two or more direct current units, an alternating current cabinet configured to provide two or more alternating current units, a communication cabinet, and a power distribution cabinet which are all arranged in the box, wherein the inverter cabinet is arranged on a first side of the box; the alternating current cabinet, the communication cabinet and the power distribution cabinet are all arranged on a second side of the box, and the alternating current cabinet, the communication cabinet, and the power distribution cabinet are all arranged opposite to the inverter cabinet; the direct current cabinet is arranged on a third side of the box, and the direct current cabinet is arranged on a same side of the inverter cabinet and the alternating current cabinet; the box has a cuboid shape or cube shape, the first side of the box is opposite to the second side of the box, and the third side of the box is located at a same end of the first side and the second side of the box; the inverter cabinet is connected to the direct current cabinet, the direct current cabinet is connected to the alternating current cabinet, and the alternating current cabinet is arranged adjacent to the direct current cabinet; and a maintenance passage is arranged between the alternating current cabinet and the inverter cabinet, the maintenance passage is also arranged between the communication cabinet and the inverter cabinet, and the maintenance passage is also arranged between the power distribution cabinet and the inverter cabinet, and the maintenance passage extends to the direct current cabinet; and the box is provided with a maintenance entrance communicated with the maintenance passage. a box; and an inverter cabinet configured to provide two or more inverter units, a direct current cabinet configured to provide two or more direct current units, an alternating current cabinet configured to provide two or more alternating current units, a communication cabinet, and a power distribution cabinet which are all arranged in the box, wherein the inverter cabinet is arranged on a first side of the box; the alternating current cabinet, the communication cabinet and the power distribution cabinet are all arranged on a second side of the box, and the alternating current cabinet, the communication cabinet, and the power distribution cabinet are all arranged opposite to the inverter cabinet; the direct current cabinet is arranged on a third side of the box, and the direct current cabinet is arranged on a same side of the inverter cabinet and the alternating current cabinet; the box has a cuboid shape or cube shape, the first side of the box is opposite to the second side of the box, and the third side of the box is located at a same end of the first side and the second side of the box; the inverter cabinet is connected to the direct current cabinet, the direct current cabinet is connected to the alternating current cabinet, and the alternating current cabinet is arranged adjacent to the direct current cabinet; and a maintenance passage is arranged between the alternating current cabinet and the inverter cabinet, the maintenance passage is also arranged between the communication cabinet and the inverter cabinet, and the maintenance passage is also arranged between the power distribution cabinet and the inverter cabinet, and the maintenance passage extends to the direct current cabinet; and the box is provided with a maintenance entrance communicated with the maintenance passage.