Sungrow SG500MX - Temperature Derating and MPPT

Operation Manual 8 Inverter Functions
37
Grid-connectionpoint
voltage(Upu)
Fig. 8-2 High voltage withstand requirements
The inverter meets the abovementioned requirements.
8.6 Temperature Derating
When the ambient temperature is below 50℃, inverter can operates at 110% of the overload
condition. When the ambient temperature reaches 55℃, inverter can keep the nominal power
output. When the ambient temperature is above 65℃, inverter enters into protection mode.
Temperature（℃）
1.0
1.1
05525 50
Nominalvalue
65
1.2
L1=10kW/℃
L2=50kW/℃
-30
Fig. 8-3 Inverter temperature derating function
Ambient temp. T Inverter operation situation
T<-30℃
Inverter starts with the aid of auxiliary heater
-30℃<T≤50℃
Operate for a long time at 110% of the overload condition
50℃<T≤55℃ Operate with derating at 10kW/℃
55℃<T≤65℃ Operate with derating at 50kW/℃
T>65℃
Enter protection mode;
Automatically restart when temperature drops below 55℃