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13
Operation and installation manual SOLIVIA 2.5 AP G3 TR
your local country installation requirements and regulations for correct tripping char-
acteristic type). In addition, attention is to be paid to the selectivity of the fuse unit
attached upstream of the automatic circuit breaker.
The solar inverter must be grounded via the AC connector’s PE conductor. To do this,
connect the PE conductor to the designated terminal. If you wish to integrate more than
one inverter into the installation, please proceed as illustrated in the drawings in the
appendix.
Please note the cable length and the cable cross-section, due to the risk of undesirable
temperature rise and power losses.
The AC connector is protected from unintentional disconnection by a clip mechanism
which can be released with a screwdriver.
7.7
Connection of PV modules
Before the photovoltaic system is connected, the polarity of the PV voltage at the Multi-
Contact connectors must be checked to ensure that it is correct.
The connection of the PV module is implemented using Multi-Contact MC4 connectors,
where the DC negative pole is located on the connector upper row and the DC positive
pole on the connector lower row. The connectors are coded to prevent you from acci-
dentally plugging them into the wrong terminal.
Please ensure the following at all times:
● That there is never any risk of anyone coming into contact with the solar inverter
connection terminals, due to the risk of dangerous voltages across them.
● That under no circumstances are the PV modules to be disconnected from the
solar inverter under load. If a disconnection should be necessary, first switch the
grid off so that the solar inverter cannot absorb any further power. Next, open the
upstream DC disconnector.
The maximum input voltage of the solar inverter is 540 V. The maximum current load of
each individual Multi-Contact MC4 connector is 18 A.
The solar inverter has an insulation and grounding monitoring on the DC side. The
options can be configured in the Setup menu “S -> Solar ISO / GND” (see
„8.3.7.1 Sub-
menu S: Solar ISO / GND“, page 29
).
The insulation monitoring has two modes:
● ISO-ON-Error (the solar inverter is disconnected from the grid in the event of an
insulation fault)
● ISO-ON-Warning (the solar inverter indicates the fault but is not disconnected from
the grid).
Deltas solar inverters are factory-set to ISO-ON-Warning mode on delivery.
The grounding monitoring has two modes:
● PV+ grounding (grounding monitoring of the positive pole of the PV generator)
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