1. Higher efficiency. Due to the high price of solar cells at present, in order to maximize the use of solar cells and improve system efficiency, it is necessary to try to improve the efficiency of the inverter.
2. High reliability. At present, the photovoltaic power station system is mainly used in remote areas, and many power stations are unattended and maintained. This requires the inverter to have a reasonable circuit structure, strict component selection, and requires the inverter to have various protection functions, such as input DC Polarity reversal protection, AC output short-circuit protection, over-temperature and overload protection, etc.
3. The input voltage has a wide range of adaptation. Since the terminal voltage of the solar cell changes with the load and the intensity of sunlight, especially when the battery ages, the terminal voltage varies greatly. For example, for a 12V battery, the terminal voltage may vary between 10V-16V, which requires The inverter guarantees normal operation within a large DC input voltage range.