Off-Grid Low-Frequency Inverter converts DC power (battery, storage battery) into AC power (usually 220v50HZ sine or square wave). In layman's terms, Off-Grid Low-Frequency Inverter is a device that converts direct current (DC) into alternating current (AC).

Photovoltaic inverters are electronic products, limited by internal electronic components, they must have a certain life span. The life of a photovoltaic inverter is determined by the quality of the product, the installation and use environment, and subsequent operation and maintenance.

The solar controller is a device used to control the photovoltaic panel to charge the battery and provide load control voltage for the voltage sensitive equipment. It regulates and controls the charging and discharging conditions of the battery, and controls the solar cell components and the battery according to the power demand of the load. The power output to the load is the core control part of the entire photovoltaic power supply system.