Performance Parameters Of Solar Inverters

There are many parameters and technical conditions that describe the performance of inverters, and here we will briefly explain the commonly used technical parameters when evaluating inverters.
1. The operating environment and normal operating conditions of the inverter include an altitude of no more than 1000m and an air temperature of 0~+40 ℃.
2. DC input power supply conditions, input DC voltage fluctuation range: ± 15% of the rated voltage value of the battery pack.
3. The rated output voltage, within the allowable fluctuation range of the specified input DC voltage, represents the rated voltage value that the inverter should be able to output. There are generally the following regulations for the stability and accuracy of the output rated voltage value:
(1) During steady-state operation, the voltage fluctuation range should have a limit, such as its deviation not exceeding ± 3% or ± 5% of the rated value.
(2) Under dynamic conditions with sudden load changes or other interference factors, the output voltage deviation should not exceed ± 8% or ± 10% of the rated value.
4. The rated output frequency, the frequency of the inverter output AC voltage, should be a relatively stable value, usually 50Hz power frequency. Under normal working conditions, the deviation should be within ± 1%.
5. Rated output current (or rated output capacity) refers to the rated output current of the inverter within the specified load power factor range. Some inverter products provide rated output capacity, expressed in VA or kVA. The rated capacity of the inverter is the product of the rated output voltage and rated output current when the output power factor is 1 (i.e. pure resistive load).
6. Rated output efficiency, the efficiency of an inverter is the ratio of its output power to input power under specified operating conditions, expressed in%. The efficiency of the inverter 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, sine wave inverter, under resistive load, the maximum harmonic content of the output voltage should be ≤ 10%.
8. The overload capacity of the inverter, the ability of the inverter to output more than the rated current value in a short period of time under specified conditions. The overload capacity of the inverter should meet certain requirements under the specified load power factor.