What are the relevant parameters of the inverter?

Rated output voltage: The rated voltage value that the inverter should output when outputting rated current under specified input power conditions. (Usually the voltage fluctuation range is 220V±5% for single-phase; 380±5% for three-phase.)

Rated output current: The rated output current of the inverter within the specified negative power factor range. Some inverters give rated output capacity, expressed in VA or KVA. The rated capacity of the inverter is the product of the rated output voltage and the rated output current when the output power factor is 1 (pure resistive load).

Starting voltage: Conventional inverters are powered by DC. When the sun is shining, the string voltage will gradually increase. When the string voltage exceeds the starting voltage value, the inverter starts and starts working. (To prevent the inverter from starting repeatedly, the starting voltage is usually higher than the minimum operating voltage.) The lower the starting voltage, the earlier it starts and the longer it takes to generate electricity.

Maximum input voltage: refers to the upper limit of the input voltage that the inverter can withstand. In conjunction with the maximum open circuit voltage of the string, at the lowest temperature, the maximum open circuit voltage of the string does not exceed the maximum DC input voltage.

Maximum Power Point Tracking, abbreviated as MPPT (Maximum Power Point Tracking): The core function of the inverter can track the maximum power generation point of the component under the current situation. Simply put, it can track the voltage. In actual work, the output power can be maximized at the most appropriate voltage.

MPPT working voltage range: That is, the range in which MPPT can effectively track the changing voltage of components. Only within this range, the inverter can work normally. The wider the voltage range, the greater the inverter's applicability.

Number of MPPTs: Each MPPT can perform maximum power tracking independently, and multiple string connections can exist under the same MPPT. A larger number of MPPTs is more beneficial to solving the mismatch problem; a smaller number of MPPTs is more advantageous in terms of stability and efficiency.

Nominal power: The rated power of the device, the maximum value allowed for the operation of the device.

Power factor: Generally, the inverter outputs pure active power by default. That is, the power factor is 1. It can be set and adjusted according to the actual situation, and the power factor is ~1 (0.8 lead...0.8 lag).

What is an IP rating?

Ingress Protection: In the IEC standard, it is for the external protection of the electrical equipment enclosure. The first number of IPXX indicates dustproof; the second number indicates waterproof. The higher the number, the higher the level of protection. (For example: IP65 6 means completely preventing dust from entering, 5 means low-pressure spraying at any angle has no impact.)

AFCI

full name Arc-Fault Circuit-Interrupter: A protection device that identifies the arc fault characteristic signal of a circuit and actively cuts off the power circuit before a short circuit or fire occurs.

PID

Full name: Potential Induced Degradation: A large amount of charge accumulates on the surface of the battery, causing the battery surface to become ineffective, resulting in a decrease in the power of the battery component.