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000870BG
5 - Installation
Input connection to PV generator (DC side)
After having carried out preliminary checks and therefore having veried
that there are no problems in the photovoltaic system, and the channel
conguration has been selected (parallel or independent) you may con-
nect the inputs to the inverter.
According to the system conguration, check the correct setting of the channels to indepen-
dent or in parallel mode. An incorrect setting of the input channels can lead to loss of energy
production.
Comply with the maximum input current relating to the quick-t connectors as indicated in the
technical data.
Polarity inversion can cause serious damage. Check polarity before connecting each string!
When the photovoltaic panels are exposed to sunlight they provide continuous DC voltage
to the inverter. To avoid risks of electrical shock, all wiring operations must be carried out
with the DC disconnect switch (internal or external to the inverter) OFF.
Caution! The inverters referred to in this document are TRANSFORMERLESS. This type
requires the use of insulated photovoltaic panels (IEC61730 Class A Rating) and the need to
keep the photovoltaic generator oating with respect to ground: no terminal of the generator
must be connected to ground.
The DC side connections are different according to the version used:
- the Standard / -S models use cable glands
- the -SX / -SX2 models use quick t connectors (one for each pole of each
string).
On the Standard / -S versions, the connection in parallel of the strings ( array composition)
must take place upstream of the input in the inverter and must be made by technicians during
installation.
The -SX / -SX2
versions accept a direct single strings connection with con-
nectors which are located on the outside of the mechanics.
To avoid risks of electrical shock,, all the connect operations must be carried out with the DC
disconnect switch
15
and the external AC disconnect switch open.
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