19 20
Please ensure that the following conditions are met, otherwise it may
cause a fire hazard or damage the inverter. In this case, Growatt shall not
be liable for the consequence.
Ø The maximum open circuit voltage of each string of photovoltaic
modules shall not exceed 1000Vdc under any conditions.
Ø PV modules connected in series in each PV string should be of the
same specification type.
Ø The maximum short-circuit current of each PV string must not exceed
26A under any conditions.
Ø The total output power of all PV strings must not exceed the maximum
input power of the inverter.
Ø The negative terminal of the PV panel mustn't be grounded when
there is no isolation transformer (the inverter output is connected to the
grid directly).
Ø If a stable non- zero DC voltage is detected between the positive pole
of the photovoltaic string and the ground, it means that an insulation fault
has occurred at a certain position in the photovoltaic string. You need to
ensure that the fault is rectified before continuing the wiring process.
Moisture and dust penetration can damage the inverter.
Ø Make sure that the waterproof cable gland is firmly tightened.
Ø If the cable connector is not installed correctly, the inverter may be
damaged due to the penetration of moisture and dust. In this case, all
warranties shall be void.
Warning
Note
The MID 11-20KTL3-XH inverters have two independent inputs, while the
MID 25-30KTL3-XH inverters have three inputs.
Fig 6.5
When installing the PV modules, please note that:
Ø The PV modules in each PV string should be of the same specifications and model.
Ø Each PV string should have the same number of PV modules connected in series.
Ø Before connecting to the PV panel, ensure the correct polarity. Connect
the positive and negative terminals of a PV module to the positive and
negative DC input terminals of the inverter respectively.
Ø The maximum DC input current and voltage of the inverter shall not
exceed the following limits.
Max. input current per
MPPT
Connecting the DC terminals
Cable
Cable
Positive metal contact
Positive connector
Negative connector
Negative metal contact
4~6mm²
4~6mm²
Fig 6.6
Note
6.4 Connecting the Bidirectional DC/DC Box
The MID 11-30KTL3-XH three-phase inverters feature two independent BAT inputs: the
BAT+/BAT- terminal can be connected to a Bidirectional DC/DC Box.
Please note that the connectors used are paired male and female connectors. The
connectors used to connect the Bidirectional DC/DC Box and the inverter are Helios H4-
R/VP-D4/MC4 connectors.
The Bidirectional DC/DC Box is used to work with the inverter to manage the battery's
charging and discharging mode.
6.4.1 Conditions for Bidirectional DC/DC Box
Fig 6.7
To Next Page
Loading...
