Solare Datensysteme Solar-Log - Manual (Page 79)

79
Notifications
3�2�2 Calculation and Explanation of the Notification
In regard to the reference inverter, inverter 1 is compared to all of the inverters in the same module field (in
the example only output is used).
A deviation of 19.65% is determined based on the comparison of the generator capacity and IRV forecast.
Calculating the Deviation for Inverter 1
Deviation Calculation
Inverter 1 IRV calculation (5500 x 89.39)100= IRV 4916 W
Efficiency of Inverter 1 (3950 W: 5500 W)* 100= 71.81%
This corresponds to 71.81 % of the generator power or a value of 0.7181 kWp.
Deviation as a percentage
IRV Inverter 1 - IAV Inverter 1 4916 W -3950 W= 966 W
Deviation as a percentage (966 W: 4916 W)* 100= 19.65 %
Inverter 2 is used as the reference inverter since it was the most effective one at the time of the measure-
ment. Inverter 1 should have produced an output of 4916 W based on the measurement and the calcula-
tions comparing all of the inverters in the same module field. The actual output was 3950 W, a deviation of
19.65%. This caused a notification to be sent.