1. The environmental conditions of the inverter. The normal operating conditions of the inverter: the altitude does not exceed 1000m, and the air temperature is 0 ～ + 40 ℃.
2. DC input power supply conditions, input DC voltage fluctuation range: ± 15% of the rated voltage of the battery pack.
3. The rated output voltage is within the allowed fluctuation range of the specified input DC voltage, which indicates the rated voltage value that the inverter should be able to output. The stability accuracy of the output rated voltage value is generally as follows:
(1) During steady-state operation, the voltage fluctuation range should be limited, for example, its deviation should not exceed ± 3% or ± 5% of the rated value.
(2) The output voltage deviation should not exceed ± 8% or ± 10% of the rated value in a dynamic situation with sudden load changes or other interference factors.
4. Rated output frequency. The frequency of inverter output AC voltage should be a relatively stable value, usually 50Hz. The deviation should be within ± 1% under normal working conditions.
5. The rated output current (or rated output capacity) indicates the rated output current of the inverter within the specified load power factor range. Some inverter products give the rated output capacity, and its unit is expressed in VA or kVA. The rated capacity of the inverter is the product of the rated output current when the output power factor is 1 (that is, a purely resistive load).
6. Rated output efficiency. The efficiency of the inverter is the ratio of its output power to input power under specified operating conditions, expressed in%. The inverter's efficiency at rated output capacity is full load efficiency, and the efficiency at 10% of rated output capacity is low load efficiency.
7. The maximum harmonic content of the inverter. For a sine wave inverter, under resistive load, the maximum harmonic content of the output voltage should be ≤10%.
