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13. Input configuration (DC)
All versions of the inverter are equipped with two input channels (therefore with double maximum power point tracker MPPT) independent of each other,
which can however be connected in parallel using a single MPPT.
Independent channel configuration (default configuration)
This configuration uses the two input channels (MPPT) independently.
This means that the jumper (supplied) between the positive poles of the DC
(IN1 and IN2) connectors
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must be selected during the guided setup for commissioning the system is
"INDEPENDENT".
Parallel channel configuration
This configuration uses the two input channels (MPPT) connected in parallel.
This means that the jumper (supplied) between the positive poles of the
DC (IN1 and IN2) connectors
must be selected during the guided setup for commissioning the system is
"PARALLEL".
14. Input connection (DC)
Check for correct polarity in the input strings and absence of any leakage to ground in the PV generator. When exposed to sunlight,
the PV panels supply DC direct voltage to the inverter. The inside of the inverter may only be accessed after the equipment has
been disconnected from the grid and from the photovoltaic generator.
Warning! The inverters to which this document relates to are WITHOUT ISOLATION TRANSFORMER (transformer-less). This type
involves the use of insulated photovoltaic panels (IEC61730 Class A Rating) and the need to maintain the photovoltaic generator
floating with respect to earth: no pole of the generator must be connected to earth.
To avoid risks of electrical shock, all wiring operations must be carried out with the DC disconnect switch internal and external (if
present, applying LOTO procedures on it) to OFF position and with the external AC disconnect switch to OFF position (applying
LOTO procedures on it).
For the connections of the strings the quick fit connectors (one for each pole of each string)
located on the lower side of the REACT2-UNO are used.
• Connect all the strings required by the system, always checking the seal of the
connectors.
The number of connections for each input channel is 2 pairs of connectors.
• Give a pull test to confirm the connection is secure.
Connect directly the individual input strings to the REACT2-UNO.
Should it be necessary to make parallel strings outside the inverter,
the maximum current allowed by the individual quick fit connector
must be respected, which is 18A.
Polarity inversion can cause serious damage. Check polarity before
connecting each string!
According to the system configuration, check the correct setting of
the channels to independent or in parallel mode. An incorrect setting
of the input channels can lead to loss of energy production.
• If any string inputs are not required, you must ensure that covers are
installed to the connectors, and install any which are missing. This
is necessary both for the inverter grade IP seal, and to avoid dama-
ge to the free connector which may be used at a later time.
must not be installed and that the mode which
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must be installed and that the mode which
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32
IN1
IN1
32
32
IN1
IN1
BATTERY
COMM.
POWER
- 16 -
IN1
IN2
IN1
IN2
IN1
IN2
IN1
IN2
PV
METER
DC SWITCH
BACKUP
18
19
EN
IN2
IN2
IN2
IN2
GRID
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