Grid Type - Growatt 8000TL3-S Installation & Operation Manual

3 Check the assembled DC connectors for correct polarity and connect them to the
inverter.
4 The maximum string currents are varying from different inverter types.
Model
7000TL3-S
8000-9000TL3-S
10000-11000TL3-S
12000TL3
12000-15000TL3-S
5 In order to seal the inverter, all unneeded DC inputs must be closed with sealing
plugs:
Cable requirements:
Diameter(mm)
Model
7000-15000TL3-S 1.63-2.05
5.4.4 Grounding
AC Grounding
The TL3-S series inverter must be connected to the AC grounding conductor of the
power distribution grid via the ground terminal (PE).
PV Grounding
The grounding conductor in the framework of the PV array must be connected to the
PV grounding conductor and the DC grounding conductor. The cross-section of the
grounding conductor corresponds to the cross-section of the largest conductor in the
DC system.
DC Grounding Conductor
A DC grounding conductor may be required by the Authority Having Jurisdiction
(AHJ). Use the terminal block for the PV grounding conductor and DC grounding
conductor.
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Max.current
11.5A/11.5A
11.5A/11.5A
13A/13A
11.5A/11.5A
20A/10A
Area(mm²)
AWG
2.5-4 14-12
Ground kit
If PV modules of the PV system require POSITIVE or NEGATIVE to connect to
GROUND, the output of inverter should connect to grid with an isolating
transformer. The connection method is below:
Inverter
N of transformer should not be connected to PE.

5.5 Grid Type

5.5.1 Common grid type
Based on the local GRID standards, it may select different connection types. In the
following you will find an overview of the most common type of grid structure.
TN-C
Transformer
Transformer
L1
L2
L3
PEN
PE
TL3
TT
Transformer
L1
L2
L3
N
PE
TL3
5.5.2 Compatibility Table
Grid type TN-C grid
Grid type
yes
(N and PE of inverter both
8000-11000TL3-S
should connect to PEN of grid.)
L1
L2
L3
N
PE
TN-S
TN-C-S
Transformer
L1
L2
L3
N
PE
TL3
TL3
IT
Transformer
L1
L2
L3
PE
TL3
TN-S grid TN-C-S grid TT grid IT grid
yes,
yes yes
if UN-PE < 30V
if UN-PE < 30V
L1
L2
L3
N
PE
yes,
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