The present invention relates to a converter that enables grid-connected solar inverters to be used in stand-alone solar power generation. More specifically, the high-performance inverter used in the grid-connected solar power generation system in the solar power generation system can be used in the independent solar power generation system, so that high-quality electricity can be used at low cost even in the stand-alone solar power generation system. If you need to switch from a grid-connected solar power system to a stand-alone solar power system, or if you need to link batteries, simply install it between the solar panel and the grid-connected inverter and battery. If the equipment of the photovoltaic power generation system can be used as it is, and the inverter is used in the grid-connected solar power generation system, the grid-connected solar power generation system can be used as an emergency power source when an accident occurs due to grid problems. Solar inverters can be used in stand-alone solar power It relates to a ring device. To this end, the present invention is a pressure inverter module for implementing the environmental conditions similar to the grid-connected environment to be in a system pressurized state; A charging controller module connected to the battery to apply a maximum voltage until the battery is fully charged, and to maintain the charging voltage when the battery is fully charged; A discharge controller module connected to the battery to supply a constant voltage to the input side of the pressurized inverter module, and block the battery from becoming low voltage; And it provides a converter that enables the grid-connected solar inverter including a self-powered converter module for supplying power using the power of the battery in the independent solar power generation.
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