Inverter detection device and detection method

The inverter detection device comprises an alternating current power supply module, an electrical performance parameter detection module, a first switch and a control unit, the control unit controls the alternating current power supply module to work, and when it is detected that the alternating current power supply module outputs target off-grid alternating current, the first switch is switched on and switched off; and the detection module is used for collecting a current electrical performance parameter output to the electrical performance parameter detection module after the inverter exits from the off-grid state and starts grid-connected operation, and detecting whether the inverter can normally operate in a grid-connected manner after being installed based on a magnitude relationship between the current electrical performance parameter and a preset electrical performance parameter protection value. According to the invention, the condition of the inverter can be rapidly and truly judged in an off-grid sc