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I
nput connection to PV generator (DC side)
According to the system configuration, 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-fit 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 floating with respect to ground: no terminal of the generator
must be connected to ground.
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.
To avoid risks of electrical shock,, all the connect operations must be carried out with the DC
disconnect switch
After having carried out preliminary checks and therefore having verified
that there are no problems in the photovoltaic system, and the channel
configuration has been selected (parallel or independent) you may con-
nect the inputs to the inverter.
The DC side connections are different according to the version used:
- the Standard / -S models use cable glands
- the -SX / -SX2 models use quick fit connectors (one for each pole of each
string).
The -SX / -SX2 versions accept a direct single strings connection with con-
nectors which are located on the outside of the mechanics.
and the external AC disconnect switch open.
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5 - Installation
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