Sungrow SG125HV, User Manual

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2 Product Description User Manual
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− Anti-PID function (Optional)
− PID recovery function (Optional)
− Night SVG function (Optional)
2.3.3 Derating
Output derating is a way to protect the inverter from overload or potential
faults. Situations requiring inverter power derating are:
 Ambient temperature is too high
 Gird voltage is too low
 Fluctuations of external power level
 Input voltage is too high
 Grid frequency* is too high
Note: *The over-frequency curve may vary with the country setting.
Power Limit Setting
Inverter output power can be adjusted via the APP interface or remote grid
dispatch from the grid company.
Over-temperature Derating
High ambient temperature, a broken fan or poor ventilation will lead to inverter
power derating.
 When the IGBT module temperature exceeds the upper limit, the inverter will
derate power output until the temperature drops within the permissible
range.
 When the inverter internal temperature exceeds the upper limit, the inverter
will derate power output until the temperature drops within the permissible
range.