1. Feature: LCD dual digital display, allowing users to keep track of the output voltage and battery voltage values at any time. 2. Fault notification function. In addition to various sound prompts, faults can also be more intuitively displayed on the screen (such as low battery voltage, over - voltage of the battery, overload, high operating temperature, output short - circuit, etc.). 3. The product has added an overload delay shutdown function, which solves the sharp problem of inverter protection when easily - fused electrical appliances are turned on. 4. For the low - power non - professional consumer market, a reverse connection protection function for positive and negative electrodes has been added. 5. Advanced temperature - controlled oil - sealed fan. When the inverter is running, it can operate at a certain temperature, saving electrical energy.