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85
User Manual
Minimum-Performance-Ratio
An alarm is triggered when the performance of the plant and the defined min-
imum performance ratio (percentage ratio between target and actual perfor-
mance) falls below.
Yield Deviation
The comparison of yield is only performed once two or more inverters are ac-
tive.
Alarms are triggered as soon as an inverter has fed-in during the past day
less energy in comparison to the other inverters. Reason for this could be
soiling, partial malfunction of the solar cells or a problem within the inverter
itself.
Determine at Yield Deviation the deviation in percentage from the average
which serves as a basis for evaluating yield. The following settings are needed
for the yield deviation:
•
Yield Deviation: deviation in percentage of an inverter in relation to
the expected share of yield.
•
Minimum Yield for Yield Comparison: In order to avoid erroneous
alarm triggering on days with very low irradiance a minimum yield may
be defined. If the entire plant’s yield is below the minimum yield not the
comparison of energy and the alarm triggering will be blocked.
•
Nominal Power of Plant: The maximum power must be defined in the
field [kWp]. Entering „0” deactivates the yield monitoring.
The maximum power can be defined individually for each inverter.
Performance Ratio is only possible in connection with the
SOL.Connect MultiScan and an irradiance sensor.