Operation and installation manual
Page 77 of 82
(PVI-10.0/12.5-OUTD-xx Rev:1.2)
8.5
Power Derating
To allow safe inverter operation both from a thermal and electrical point of view, the
unit automatically decreases power input into grid.
Derating can occur in two cases:
Power derating due to ambient conditions
Derating entity and the temperature at which derating will start depend on many
operating parameters, apart from the ambient temperature. For example they also
depend on input voltage, grid voltage and power available from the photovoltaic field.
Thus AURORA will derate power during certain periods of the day, according to the
value of these parameters.
In any case AURORA guarantees maximum power up to 50°C of ambient
temperature, as far as not directly under solar radiation.
Power derating due to input power
The chart shows the automatic power derating in case of too high or low input or
output voltage.
Fig. 28 - Derating curves for two input channels.
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Input voltage (V)
PVI-10.0-OUTD-xx-IT
PVI-12.5-OUTD-xx-IT
Power Output (W)
