Fronius IG 15 - Manual (Page 17)

9
ENEN
Your FRONIUS IG unit is the latest generation of solar inverters. It is the
highly complex link between solar modules and the public electricity
mains network.
As such it is in charge of a number of highly qualified tasks.
General infor-
mation
The FRONIUS IG Unit in the Photovoltaic System
The FRONIUS IG unit transforms the direct current generated by the solar
modules into alternating current. This alternating current is fed into your
home system or into the public mains synchronically with the voltage
which is used there. The FRONIUS IG has been designed exclusively for
use in mains connected photovoltaic schemes. It cannot generate electric
power independent from the public mains network. Transforming
DC into AC
electricity
The operation of the FRONIUS IG unit is fully automatic. Starting with
sunrise, as soon as the solar modules generate enough power, the auto-
matic control unit starts monitoring voltage and frequency. As soon as
there is a sufficient level of insolation, your solar inverter starts supplying
and feeding power. A few Watts of solar power output are sufficient to
achieve this, depending on which version the unit is!
The operation of the FRONIUS IG unit ensures that at any time the maxi-
mum possible power output is drawn from the solar modules.
This function is called MPPT (Maximum Power Point Tracking). It opera-
tes with extremely high precision. As dusk starts there is no more suffi-
cient energy available to feed power into the mains, the FRONIUS IG unit
shuts the mains connection completely and stops operating. All settings
and data recorded are of course saved.
Fully automa-
tic operation
management
The FRONIUS IG has been designed for use with solar modules of a wide
range of input voltages. This allows the use of the greatest variety of
types of solar modules. Important notice: the parameters indicated for
maximum DC voltage (total voltage of the solar cells connected) must at
no time be exceeded!
By its design and operation, the FRONIUS IG offers a maximum of safety
during installation as well as in operation.
Voltage trans-
formation and
galvanic insu-
lation