INVERTER, GRID-CONNECTED CONTROL METHOD, PHOTOVOLTAIC SYSTEM, APPARATUS AND MEDIUM

An inverter, a grid-connected control method, a photovoltaic system, an apparatus, and a medium are provided. The inverter includes: a power conversion circuit and a controller. The controller is configured to, in a case that the inverter operates in a standby state, control the inverter to operate in an off-grid state when a direct-current voltage of the inverter is greater than a voltage threshold, and adjust an off-grid operation parameter of the power conversion circuit in the inverter or an operation parameter of a temperature regulation system in an inverter cabinet. The controller is configured to, when the inverter meets at least one predetermined condition, control the inverter to operate in a grid-connected state. The predetermined condition includes: the direct-current voltage, an alternative-current voltage, an alternative-current current, a direct-current current, a direct-current side power or an alternative-current side power of the inverter being greater than a corresponding threshold.