Characteristics of photovoltaic inverters

(1) Require high efficiency.

Due to the current high price of solar cells, in order to maximize the utilization of solar cells and improve system efficiency, efforts must be made to improve the efficiency of inverters.

(2) Require high reliability.

At present, photovoltaic power station systems are mainly used in remote areas, with many power stations unattended and maintained. This requires inverters to have a reasonable circuit structure, strict component selection, and various protection functions, such as input DC polarity reversal protection, AC output short circuit protection, overheating, overload protection, etc.

(3) Require a wide adaptation range of input voltage.

Due to the variation of terminal voltage of solar cells with load and sunlight intensity. Especially when the battery ages, its terminal voltage varies greatly. For example, for a 12V battery, its terminal voltage may vary between 10V and 16V, which requires the inverter to ensure normal operation within a large DC input voltage range.