Huawei SUN2000-4.95KTL-NHL2 User manual

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HUAWEI TECHNOLOGIES CO., LTD.
SUN2000-4.95KTL-NHL2
Quick Guide
Issue: 02
Part Number: 31500GBL
Date: 2022-03-10

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1. The information in this document is subject to change without notice. Every effort has been
made in the preparation of this document to ensure accuracy of the contents, but all
statements, information, and recommendations in this document do not constitute a
warranty of any kind, express or implied. You can download this document by scanning the
QR code.
2. Before installing the device, closely read the user manual to get familiar with product
information and safety precautions.
Copyright © Huawei Technologies Co., Ltd. 2022.
All rights reserved.
1Overview
•a: The screw is used to secure the DC switch to prevent accidental startup. The screw is
delivered with the solar inverter.
•b: DC input terminals PV1 and PV2 are controlled by the DC switch.
(1) LED indicators
(2) Front panel
(3) Hanging kit
(4) Mounting bracket
(5) Heat sink
(6) Ventilation valve
(7) Screw hole for the DC
switcha
(8) DC
switchb(DC SWITCH)
(9) DC input terminals (PV1+/PV1
–)
(10) DC input terminals (PV2+/PV2
–)
(11)
Reservado
(12) Antenna port (ANT)
(13) COM port (COM)
(14) AC output port (AC)
(15) Ground point
3. Only certified electricians are allowed to operate the device. Operation personnel must wear
proper personal protective equipment (PPE).
4. Before installing the device, check that the package contents are intact and complete against
the packing list. If any damage is found or any component is missing, contact your dealer.
5. The device damage caused by the violation of instructions in this document is not covered
under warranty.
6. The cable colors involved in this document are for reference only. Select cables in accordance
with local cable specifications.

2
3
Space Angle
2Installing the Device
Mounting Hole Dimensions
Installation Requirements
2.1
Avoid drilling holes in the water pipes and cables buried in the wall.
1. Install the mounting bracket.
Installing the Solar Inverter
2.2

3
Level
2. (Optional) Install the screw for locking the DC switch.
•M6x60 expansion bolts are delivered with the solar inverter. If the length and number of the
bolts do not meet installation requirements, prepare M6 stainless steel expansion bolts by
yourself.
•The expansion bolts delivered with the solar inverter are mainly used for solid concrete walls.
For other types of walls, prepare bolts by yourself and ensure that the wall meets the load
bearing requirements of the solar inverter.
•In residential areas, do not install the solar inverter on drywalls or walls made of similar
materials which have a weak sound insulation performance because the noise generated by
the solar inverter is noticeable.
•Loosen the nut, flat washer, and spring washer of the expansion bolt at the bottom.
3. Install the solar inverter onto the mounting bracket. 4. (Optional) Install an anti-theft lock.
Prepare an anti-theft lock by yourself. The lock should be suitable for the lock hole diameter
(Ф10 mm) so that it can be installed successfully. An outdoor waterproof lock is recommended.

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Preparing Cables
3.1
•Connect cables in accordance with the local installation laws and regulations.
•Before connecting cables, ensure that the DC switch of the solar inverter and all the switches
connected to it are set to OFF. Otherwise, the high voltage produced by the solar inverter
may cause electric shocks.
3Connecting Cables
No.
Cable
Type
Conductor Cross
-
Sectional Area Range
Outer Diameter
1
Protective earthing
(PE) cable
Single
-core outdoor
copper cable
3.5
–5.5 mm2
N/A
2
AC output power
cable
Three
-core (U, O, and
W) outdoor copper
cable
3.5
–5.5 mm2
10
–21 mm
3
DC input power
cable
Standard outdoor PV
cable in the
industry
3.5
–5.5 mm2
5.5
–9 mm
4
Signal
cable
Outdoor shielded
twisted pair cable
0.20
–1mm2
Four-hole
rubber
plug: 4–8 mm
Two-hole
rubber
plug: 8–11 mm
Prepare cables based on site requirements.
Installing the PE Cable
3.2
Ground
point
•Silica gel or paint be applied around the ground terminal after the PE cable is connected.
•It is recommended that the right ground point be used for grounding. The other ground point
is reserved.

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Installing a WLAN Antenna
3.3
Antenna port (ANT)
Ensure that the WLAN antenna is
installed securely.
1. Connect the AC output power cable to the AC connector.
Installing the AC Output Power Cable
3.4
Ensure that the protective layer of the AC output power cable is inside the connector, that the
core wires are totally inserted into the cable hole, and that the cable is connected securely.
Failing to do so may cause device malfunction or damage.
Click
2. Connect the AC connector to the AC output port. Check the route of the AC output power
cable.

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AC output port (AC)
Plug insert
To remove the AC connector,
perform the operations in
reverse order of installing the
AC connector. Then, remove
the plug insert, as shown in
the following figure.
Installing DC Input Power Cables
3.5
1. Ensure that the PV module output is well insulated to ground.
2. Use the Staubli MC4 positive and negative metal terminals and DC connectors supplied with
the solar inverter. Using incompatible positive and negative metal terminals and DC
connectors may result in serious consequences. The caused device damage is not covered
under warranty.
3. The DC input voltage of the solar inverter must not exceed maximum input voltage.
4. Before installing DC input power cables, label the cable polarities to ensure correct cable
connections.
5. If DC input power cables are reversely connected, do not operate the DC switch as well as
positive and negative connectors immediately. Failing to do so may cause device damage,
which is not covered under warranty. Wait until the solar irradiance declines at night and the
PV string current reduces to below 0.5 A, and then turn off the DC switch and remove the
positive and negative connectors. Correct the string polarity before reconnecting the PV string
to the solar inverter.

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1. Assemble DC connectors.
Click
Positive metal terminal
Negative metal terminal
Ensure that the cable cannot
be pulled out after being
crimped.
Positive connector
Negative
connector
Use the wrench shown
in the figure to tighten
the locking nut. When
the wrench slips during
the tightening, the
locking nut has been
tightened.
Ensure that cable
polarities are correct.
DC input terminals
Click
Pull the DC input power
cable back to ensure that
it is connected securely.
2. Connect DC input power cables.
PV-CZM-19100
PV-MS-HZ
Open-end wrench

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Installing Signal Cables
3.6
•When laying out a signal cable, separate it from power cables to avoid strong signal
interference.
•Ensure that the protective layer of the cable is inside the connector, that excess core wires
are cut off from the protection layer, that the exposed core wire is totally inserted into the
cable hole, and that the cable is connected securely.
•Block the unused cable hole using a cap and tighten the cable gland.
•If more than one signal cables are required, ensure that they have the same outer diameter.
COM port (COM)
Use the Staubli Y-branch connectors, MC4 positive and negative metal terminals, and DC
connectors. Those of other brands may be incompatible and cause damages, which will not be
covered under warranty.
Y-branch connectors can be used to connect multiple PV modules to a SUN2000. However, it is
recommended that the same number of PV modules be connected to each Y-branch connector.

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No.
Label
Definition
Description
1
485
B
1
RS485B, RS485
differential signal–
Used for cascading solar inverters
or connecting to the JX01
terminal block of the 10
-in 1-
out
SmartACBox
.
2
485
A
1
RS485A, RS485
differential signal+
3
485
B
2
RS485B, RS485
differential signal–
Used for cascading solar inverters
or connecting to the JX01
terminal block of the 10
-in 1-
out
SmartACBox
.
4
485
A
2
RS485A, RS485
differential signal+
5
GND
GND
Reserved
GND
6
DI
DI signal
Reserved, connecting to the
positive terminal of the DI.
7
PE
Shielding ground
Shielding layer
8
PE
Shielding ground
Shielding layer
Connecting Signal Cables
Number of Communications
Cables
Click
COM Port Pin Definitions