The Fronius Ig Plus Unit In The Pv System - Fronius IG Plus 30 V-1 Operating Instructions Manual

The Fronius IG Plus Unit in the PV System

General The solar inverter is the highly complex link between the solar modules and the public grid.
Tasks The main tasks of the inverter include:
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Converting DC to The inverter transforms the direct current generated by the solar modules into alternating
AC Current current. This alternating current is fed into your home system or into the public grid and
synchronized with the voltage that is used there.
IMPORTANT! The inverter has been designed exclusively for use in grid-connected pho-
tovoltaic systems. It cannot generate electric power independently of the grid.
Fully Automatic The inverter is fully automatic. Starting at sunrise, as soon as the solar modules generate
Operational Man- enough power, the automatic control unit starts monitoring voltage and frequency. After
agement five minutes, if there is a sufficient level of irradiance, your solar inverter starts feeding en-
ergy to the grid.
The inverter control system ensures that the maximum possible power output is drawn
from the solar modules at all times.
This function is called MPPT (Maximum Power Point Tracking).
As dusk starts and there is no longer sufficient energy available to feed power into the grid,
the inverter unit shuts down the grid connection completely and stops operating. All set-
tings and recorded data are saved.
Display function The display on the inverter is the interface between the inverter and the operator. The de-
and data commu- sign of the display is geared towards simple operation and making system data available
nication as long as the inverter operates.
The inverter is equipped with a basic logging function to monitor minimum and maximum
data on a daily and a cumulative basis. These values are shown on the display.
A wide range of data communication products allows for many possibilities of recording
and viewing data.
System Upgrade The inverter is designed for various system upgrades, e.g.:
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Converting DC to AC current
Fully automatic operational management
Display function and data communication
Upgrades that enable the inverter to communicate with external system upgrades as
well as with other inverters
Datalogger (when using a PC to record and manage data from your photovoltaic sys-
tem), includes Datalogger and a modem interface