Photovoltaic inverter and step-up all-in-one machine can be used in distributed photovoltaic power generation projects to meet various environmental requirements. In addition to the inverter station, European type box transformer substation and American type box transformer substation, it also derives a comprehensive and covers almost all of the photovoltaic industry chain. It integrates DC power distribution, inverter, medium-voltage transformer, ring-network cabinet and system monitoring functions, has standard power dispatching interface, and a one-stop inverter unit scheme to solve the DC output link of photovoltaic cell modules to the grid connection link. It has significant advantages in system integration, environmental adaptation, overall investment cost, and fast installation and commissioning.