Temperature Derating - Sungrow SG500MX Operation Manual

Operation Manual
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.
-30
Ambient temp. T
T<-30℃
-30℃<T≤50℃
50℃<T≤55℃
55℃<T≤65℃
T>65℃
Fig. 8-2 High voltage withstand requirements
1.2
1.1
1.0
Nominalvalue
0 25
Temperature（℃）
Fig. 8-3 Inverter temperature derating function
Inverter operation situation
Inverter starts with the aid of auxiliary heater
Operate for a long time at 110% of the overload condition
Operate with derating at 10kW/℃
Operate with derating at 50kW/℃
Enter protection mode;
Automatically restart when temperature drops below 55℃
8 Inverter Functions
L1=10kW/℃
L2=50kW/℃
50 55 65
37