Generating characteristic curves

During the measurement, the inverter can briefly interrupt the feed-in or feed in with reduced power. The duration of a measurement is approx. 20 seconds per DC inputs. To avoid misuse of the function and thus yield loss, the measurement can be carried out a maximum of 10 times per day. If more than 10 measurements per day are to be carried out, the inverter must be restarted.

The measuring curve has over 200 measuring points. The display is from 0 V up to the maximum MPP voltage of the inverter. The current is limited by the maximum possible input current of the inverter.

The measurement curve can be visualized as an I-V characteristic curve or as a power/voltage characteristic curve (P-V characteristic curve).

The data is stored on the user interface until the next measurement.

Procedure:

  1. Log on to the user interface of the inverter.
  2. Click on Diagnosis in the menu.
  3. Click on [Start new measurement].
  4. Go to [PDF export] or [CSV export] to export the data shown.
    Setting SMA ShadeFix
    Setting the Rated Residual Current of the Residual-Current Device