User manual

Graphical yield (day, month, year)

Daily, monthly and annual yields can be displayed graphically in a chart.

①

Period for a single yield value (here: day yield)

②

y-axis:

n Yield in kWh

n With an extra

: yield in MWh

n The scaling changes depending on the maximum value.

③

x-axis: time in hours/days/months/years

④

Total of all individual yields shown in the diagram, in kWh

The graphical representation can show annual yields for the last 20

years.

Event messages

See

Ä 7, p. 128

Generator characteristic curve

①

x-axis: input voltage in V

②

y-axis: power in kW

③

Peak = MPP

When the

‘Gen. Ch. Curve’

menu item is called, the inverter records

the generator characteristic curve of the inverter and then displays

it (Fig. upper left). The following applies:

n The inverter traverses the input voltage range and records the

power generated over this range. Duration: a few seconds,

is displayed.

n The MPP is the peak of the generator characteristic curve.

n This peak and the generator characteristic curve change with

the level of solar irradiation.

n Multiple peaks are a sign of partial shadowing (Fig. left).

n If the top of the curve is flat then the inverter can possibly no

longer feed power into the grid.

747.431 | Z08 | 2014-01-31