24
25
Rise up the Growatt MTL a little higher than the bracket. Considered the weight
of them. During the process please maintain the balance of the Growatt MTL.
Hang the inverter on the bracket through the match hooks on bracket.
After confirming the inverter is fixed reliably, fasten M6 socket head cap screws
on the left and right side firmly to prevent the inverter from being lifted off the
bracket.
Connecting the Second Protective Conductor
If the installation requires, the earth terminal can be used to connect a second
protective conductor or as equipotential bonding. This prevents touch current if
the original protective conductor fails.
Cable requirement:
Earthing cable cross-section: 5.26 mm² at maximum
5.4. Connect switch
Separate the Growatt securely from the grid and the PV generators using DC and AC
Switch. You must provide an AC circuit breaker. If Growatt DC Switch is included in
the delivery of the Growatt, it must be used for operating the inverter.
5.5. Grounding
The Growatt 2500 - 5000MTL series are transformerless inverters. That is why it has
no galvanic separation. Do not ground the DC circuits of the PV modules connected
to the Growatt. Only ground the mounting frame of the PV modules. If you connect
grounded modules to the Growatt, the error message "PV ISO Low".
The inverter must be connected to the AC grounding conductor of the power
distribution grid via the ground terminal (PE)
WARNING
Because of the transformerless design, the DC positive pole and DC
negative pole of PV arrays are not permitted to be grounded.
5.6. Connect grid type
5.6. Connect grid type
TN-C grid
suitable
TN-S grid
suitable
TN-C-S grid
suitable
TT grid
suitable
5.7. Electrical connection
5.7.1. Safety
DANGER
Danger to life due to lethal voltages!
High voltages which may cause electric shocks are present in the
conductive parts of the inverter. Prior to performing any work on
the inverter, disconnect the inverter on the AC and DC sides
WARNING
Danger of damage to electronic components due to electrostatic
discharge.
Take appropriate ESD precautions when replacing and installing the
inverter.
5.7.2. Connection to the grid(AC)
You must install a separate single-phase circuit-breaker or other load disconnection
unit for each inverter in order to ensure that the inverter can be safely disconnected
under load.
400Vac/20A
Growatt 2500MTL
Growatt 3000MTL
Growatt 3600MTL
Growatt 4200MTL
Growatt 4600MTL
Growatt 5000MTL
Open the breaker or fuse between the inverter and utility;
Measure the public grid voltage and frequency (Voltage: 230Vac; Frequency:
50Hz/60Hz;
Please refer to the below form for the AC switch.
Types
Max current output
Suggested AC switch spec
13A
400Vac/25A
15A
400Vac/25A
18A
400Vac/32A
21A
23A
400Vac/32A
25A
400Vac/32A
