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The Fronius IG Plus solar inverter is a highly sophisticated link between
the solar modules and the public grid.
General
The Fronius IG Plus in the Photovoltaic System
The Fronius IG Plus converts the direct current (DC) generated by the
solar modules into alternating current (AC). This alternating current is fed
synchronously into your house’s mains voltage network or the public grid.
Important The Fronius IG Plus was developed exclusively for use with
grid-connected photovoltaic systems. Power generation independent from
the public grid is not possible.
Converting DC
to AC current
The operation of Fronius IG Plus is fully automatic. As soon as enough
power is being generated after sunrise, the control module begins monito-
ring the mains voltage and frequency. When the sunlight has reached a
sufficient level of irradiation, the photovoltaic inverter will start the feed in
operation.
The Fronius IG Plus operates in such a way as to ensure that the maxi-
mum power possible is obtained from the solar modules.
This function is called „Maximum Power Point Tracking“ (MPPT).
As soon as the available power is no longer sufficient to feed into the grid
after dusk, the Fronius IG Plus disconnects completely from the grid and
shuts down. All settings and data are saved.
Fully Auto-
matic Operati-
onal Manage-
ment
Tasks The main tasks of the Fronius IG Plus include:
- Converting DC to AC current
- Fully automatic operational management
- Display function and data communication
The display on the inverter is the interface between the inverter and the
operator. The design of the display is geared towards simple operation
and making system data available as long as the inverter operates.
Display Func-
tion and Data
Communicati-
on
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