SUNGROW SG110CX 110 KW On-grid String Inverter User Manual
- June 4, 2024
- SUNGROW
Table of Contents
SG110CX 110 KW On-grid String Inverter
PV Grid-Connected Inverter User Manual
SG110CX
WWW.SUNGROWPOWER.COM
SG110HX-UEN-Ver18-202106
All Rights Reserved
All Rights Reserved No part of this document can be reproduced in any form or
by any means without the prior written permission of Sungrow Power Supply Co.,
Ltd (hereinafter “SUNGROW”). Trademarks
and other Sungrow trademarks used in this manual are owned by SUNGROW. All
other trademarks or registered trademarks mentioned in this manual are owned
by their respective owners. Software Licenses · It is prohibited to use data
contained in firmware or software developed by SUN-
GROW, in part or in full, for commercial purposes by any means. · It is
prohibited to perform reverse engineering, cracking, or any other operations
that
compromise the original program design of the software developed by SUNGROW.
I
About This Manual
The manual mainly contains the product information, as well as guidelines for
installation, operation and maintenance. The manual does not include complete
information about the photovoltaic (PV) system. The reader can get additional
information about other devices at www. sungrowpower. com or on the webpage of
the respective component manufacturer. Validity This manual is valid for the
following inverter models: · SG110CX They will be referred to as “inverter”
hereinafter unless otherwise specified. Target Group This manual is intended
for inverter owners who will have the ability to interact with the inverter
and qualified personnel who are responsible for the installation and
commissioning of the inverter. Qualified personnel should have the following
skills: · Training for installation and commissioning of electrical system, as
well as dealing
with hazards · Knowledge of the manual and other related documents · Knowledge
of the local regulations and directives How to Use This Manual Read the manual
and other related documents before performing any work on the inverter.
Documents must be stored carefully and be available at all times. Contents may
be periodically updated or revised due to the product development. The manual
content of subsequent versions of the inverter may be subject to change. The
latest manual can be found at support.sungrowpower.com. Symbols Important
instructions contained in this manual should be followed during installation,
operation and maintenance of the inverter. They will be highlighted by the
following symbols.
Indicates a hazard with a high level of risk that, if not avoided, will result
in death or serious injury.
Indicates a hazard with a medium level of risk that, if not avoided, could
result in death or serious injury.
II
Indicates a hazard with a low level of risk that, if not avoided, could result
in minor or moderate injury. Indicates a situation that, if not avoided, could
result in equipment or property damage.
Indicates additional information, emphasized contents or tips that may be
helpful, e.g. to help you solve problems or save time.
III
Contents
All Rights Reserved ………………………………………………………………………………………..I About This Manual
………………………………………………………………………………………..II
1 Safety ……………………………………………………………………………………………….. 1
1.1 PV Panels……………………………………………………………………………………….. 1 1.2 Utility Grid
………………………………………………………………………………………. 1 1.3 Inverter
………………………………………………………………………………………….. 2
2 Product Description ………………………………………………………………………… 4
2.1 System Introduction …………………………………………………………………………. 4 2.2 Product
Introduction…………………………………………………………………………. 5 2.3 Symbols on the Product
……………………………………………………………………. 7 2.4 LED Indicator
………………………………………………………………………………….. 7 2.5 DC Switch
………………………………………………………………………………………. 8 2.6 Circuit Diagram
……………………………………………………………………………….. 8 2.7 Function Description
………………………………………………………………………… 9
3 Unpacking and Storage ………………………………………………………………… 11
3.1 Unpacking and Inspection ……………………………………………………………….. 11 3.2 Inverter
Storage …………………………………………………………………………….. 11
4 Mechanical Mounting …………………………………………………………………… 12
4.1 Safety during Mounting …………………………………………………………………… 12 4.2 Location
Requirements …………………………………………………………………… 12
4.2.1 Environment Requirements……………………………………………………… 13 4.2.2 Carrier
Requirements……………………………………………………………… 13 4.2.3 Angle Requirements
………………………………………………………………. 13 4.2.4 Clearance Requirements
………………………………………………………… 14 4.3 Installation
Tools…………………………………………………………………………….. 15 4.4 Moving the Inverter
………………………………………………………………………… 17 4.4.1 Manual Transport
………………………………………………………………….. 17 4.4.2 Hoisting Transport
…………………………………………………………………. 18 4.5 Installing the mounting-bracket
………………………………………………………… 19 4.5.1 PV Bracket-Mounted Installation
………………………………………………. 19 4.5.2 Wall-Mounted Installation ………………………………………………………..
20
V
4.6 Installing the Inverter ………………………………………………………………………. 21
5 Electrical Connection ……………………………………………………………………. 23
5.1 Safety Instructions………………………………………………………………………….. 23 5.2 Terminal
Description……………………………………………………………………….. 23 5.3 Electrical Connection Overview
………………………………………………………… 25 5.4 Crimp OT/DT terminal………………………………………………………………………
27 5.5 Additional Grounding Connection ……………………………………………………… 28
5.5.1 Additional Grounding Requirements………………………………………….. 28 5.5.2 Connection
Procedure ……………………………………………………………. 29 5.6 Opening the Wiring Compartment
…………………………………………………….. 29 5.7 AC Cable Connection ………………………………………………………………………
30 5.7.1 AC Side Requirements ……………………………………………………………. 30 5.7.2 Requirements
for OT/DT Terminal …………………………………………….. 32 5.7.3 Connection Procedure(For a
multi-core cable)……………………………. 32 5.7.4 Connection Procedure(L1/L2/L3/N, For
four single-core
cables)…………………………………………………………………………….. 35 5.7.5 Connection
Procedure(L1/L2/L3/PE, For four single-core
cables)…………………………………………………………………………….. 38 5.8 DC Cable Connection
……………………………………………………………………… 41
5.8.1 PV Input Configuration ……………………………………………………………. 41 5.8.2 Assembling the
PV Connectors ………………………………………………… 42 5.8.3 Installing the PV Connector
……………………………………………………… 44 5.9 RS485 Connection …………………………………………………………………………. 45
5.9.1 Interface Description………………………………………………………………. 45 5.9.2 RS485
Communication System ……………………………………………….. 46 5.9.3 Connection
Procedure(Terminal Block) ……………………………………… 48 5.9.4 Connection Procedure (RJ45
Ethernet Port)……………………………….. 49 5.10 Dry Contact Connection
………………………………………………………………… 51 5.10.1 Dry Contact Function
……………………………………………………………. 51 5.10.2 Wiring Procedure………………………………………………………………….
53 5.11 DRM ConnectionFor Countries “AU” and “NZ” ……………………… 53 5.11.1 DRM
Function …………………………………………………………………….. 53 5.11.2 Connection Procedure
………………………………………………………….. 54 5.12 Closing the Wiring Compartment
…………………………………………………….. 55 5.13 Communication Module Connection (optional)
………………………………….. 56
6 Commissioning ………………………………………………………………………………. 57
VI
6.1 Inspection before Commissioning……………………………………………………… 57 6.2 Commissioning
Procedure ………………………………………………………………. 57
7 iSolarCloud App ……………………………………………………………………………… 58
7.1 Brief Introduction……………………………………………………………………………. 58 7.2 Installing the
App……………………………………………………………………………. 58 7.3 Function Overview
…………………………………………………………………………. 59 7.4 Login…………………………………………………………………………………………….
59
7.4.1 Requirements ……………………………………………………………………….. 59 7.4.2 Login Procedure
……………………………………………………………………. 59 7.5 Home page ……………………………………………………………………………………
61 7.6 Run Information …………………………………………………………………………….. 64 7.7 Records
……………………………………………………………………………………….. 65 7.8 More
……………………………………………………………………………………………. 67 7.8.1 System Parameters
……………………………………………………………….. 67 7.8.2 Operation Parameters
……………………………………………………………. 68 7.8.3 Power Regulation
Parameters………………………………………………….. 70 7.8.4 Communication Parameters
……………………………………………………. 75 7.8.5 Firmware Update…………………………………………………………………… 75
7.8.6 Password Changing ………………………………………………………………. 76
8 System Decommissioning ……………………………………………………………. 78
8.1 Disconnecting the Inverter……………………………………………………………….. 78 8.2 Dismantling
the Inverter…………………………………………………………………… 78 8.3 Disposal of the
Inverter……………………………………………………………………. 79
9 Troubleshooting and Maintenance ……………………………………………… 80
9.1 Troubleshooting …………………………………………………………………………….. 80 9.2 Maintenance
…………………………………………………………………………………. 89
9.2.1 Maintenance Notices……………………………………………………………… 89 9.2.2 Routine
Maintenance……………………………………………………………… 90 9.2.3 Cleaning Air Inlet and Outlet
…………………………………………………….. 91 9.2.4 Fan Maintenance ………………………………………………………………….. 91
10 Appendix ………………………………………………………………………………………. 94
10.1 Technical Data …………………………………………………………………………….. 94 10.2 Wring Distance of
DI Dry Contact ……………………………………………………. 95 10.3 Quality Assurance
………………………………………………………………………… 97 10.4 Contact Information
……………………………………………………………………… 97
VII
1 Safety
The device has been designed and tested strictly according to international
safety regulations. Read all safety instructions carefully prior to any work
and observe them at all times when working on or with the device. Incorrect
operation or work may cause: · Injury or death to the operator or a third
party; · Damage to the device and other properties. All detailed work-related
safety warnings and notes are specified at critical points in this manual.
The safety instructions in this manual cannot cover all the precautions that
should be followed. Perform operations considering actual onsite conditions.
SUNGROW shall not be held liable for any damage caused by violation of the
safety instructions in this manual.
1.1 PV Panels
PV strings will produce electrical power when exposed to sunlight and can
cause a lethal voltage and an electric shock. · Always keep in mind that the
inverter is dual power supplied. Electrical oper-
ators must wear proper personal protective equipment: helmet, insulated
footwear, gloves, etc. · Before touching the DC cables, operator must use a
measuring device to ensure that the cable is voltage-free. · The opeator must
follow all warnings on the PV strings and in its manual.
1.2 Utility Grid
Follow the regulations related to the utility grid.
1
1 Safety
User Manual
All electrical connections must be in accordance with local and national
standards. Only with the permission of the local utility grid company, the
inverter can be connected to the utility grid.
1.3 Inverter
Danger to life from electric shocks due to live voltage Do not open the
enclosure at any time. Unauthorized opening will void warranty and warranty
claims and in most cases terminate the operating license.
Risk of inverter damage or personal injury
· Do not connect or disconnect the PV and AC connectors when the inverter is
running.
· Wait at least 5 minutes for the internal capacitors to discharge after all
electric devices are removed and the inverter is powered off.
· Ensure that there is no voltage or current before connecting or
disconnecting the PV and AC connectors.
All safety instructions, warning labels, and nameplate on the inverter: · Must
be clearly legible. · Should not be removed or covered.
Risk of burns due to hot components! Do not touch any hot parts (such as the
heat sink) during operation. Only the DC switch can safely be touched at any
time.
2
User Manual
1 Safety
Only qualified personnel can perform the country setting. Unauthorized
alteration may cause a breach of the type-certificate marking. Risk of
inverter damage due to electrostatic discharge (ESD)! By touching the
electronic components, you may damage the inverter. For inverter handling, be
sure to:
· avoid any unnecessary touching;
· wear a grounding wristband before touching any connectors.
3
2 Product Description
2.1 System Introduction
The inverter is a transformerless 3-phase PV grid-connected inverter. As an
integral component in the PV power system, the inverter is designed to convert
the direct current power generated from the PV modules into grid-compatible AC
current and to feed the AC current into the utility grid. The intended usage
of the inverter is illustrated in the following figure.
figure 2-1 Inverter Application in PV Power System
The inverter must not be connected to a PV string that requires positive or negative grounding. Do not connect any local load between the inverter and the AC circuit breaker.
Item A B C
D E
Description
PV strings
Inverter Grid connection cabinet Transformer Utility grid
Note Monocrystalline silicon, polycrystalline silicon and thin-film without
grounding. SG110CX Includes devices such as AC circuit breaker, SPD, metering
device. Boost the low voltage from the inverter to grid-compatible medium
voltage.
TN-C, TN-S, TN-C-S, TT, IT.
The following figure shows the common grid configurations.
4
User Manual
2 Product Description
2.2 Product Introduction
Model Description The model description is as follows :
Appearance The following figure shows the dimensions of the inverter. The
image shown here is for reference only. The actual product received may
differ.
5
2 Product Description
User Manual
figure 2-2 Inverter Appearance
- The image shown here is for reference only. The actual product received may differ.
No. Name
LED indicator
1
panel
2
Labels
Additional
3
grounding
terminals
4
Bottom handles
5
Side handles
6
Mounting ears
7
Wiring area
Description HMI interface to indicate the present working state of the
inverter. Warning symbols, nameplate, and QR code.
2, use at least one of them to ground the inverter.
2, used to move the inverter. 2, used to move the inverter. 4, used to hang
the inverter onto the mounting-bracket. DC switches, DC terminals, and
communication terminals. For details, refer to”5.2 Terminal Description”
Dimensions The following figure shows the dimensions of the inverter.
6
User Manual
2 Product Description
figure 2-3 Dimensions of the Inverter(in mm)
2.3 Symbols on the Product
Symbol
Explanation
Do not dispose of the inverter together with household waste.
TÜV mark of conformity. CE mark of conformity. Regulatory compliance mark.
CGC-SOLAR mark of conformity. Danger to life due to high voltages! Only
qualified personnel can open and service the inverter. Disconnect the inverter
from all the external power sources before maintenance! Burn danger due to the
hot surface that may exceed 60°C. Do not touch live parts for 5 minutes after
disconnection from the power sources. Read the user manual before maintenance!
- The table shown here is for reference only. The actual product received may differ.
2.4 LED Indicator
The LED indicator on the front of the inverter indicates the working state of the inverter.
7
2 Product Description
User Manual
table 2-1 State description of the LED indicator
LED color
State On Fast blink (Period: 0.2s)
Definition The device is connected to the grid and operating normally. The Bluetooth communication is connected and there is data communication. No system fault occurs.
Blue
Slow blink (Period: 2s)
The device is in standby or startup state (not feeding power into the grid).
A fault occurs and the device cannot connect to the
On
grid.
Twinkling
The Bluetooth communication is connected and there is data communication.
Red
System fault occurs.
Gray
OFF
Both the AC and DC sides are powered down.
2.5 DC Switch
The DC switch is used to disconnect the DC current safely whenever necessary.
The SG110CX is equipped with three DC switches, and each DC switch controls
its corresponding DC terminals.
Turn the DC switches to the ON position before restarting the inverter.
2.6 Circuit Diagram
The following figure shows the main circuit of the inverter.
8
User Manual
2 Product Description
figure 2-4 Circuit Diagram · The MPPT is utilized for DC input to ensure the
maximum power from the PV array at
different PV input conditions. · The inverter circuit converts the DC power
into AC power and generates AC power to
loads or utility grid through the AC terminal. · The protection circuit
ensures the safe operation of the device and personal safety.
2.7 Function Description
The inverter is equipped with the following functions: Conversion Function The
inverter converts the DC current into grid-compatible AC current and feeds the
AC current into the grid. Data Storage The inverter logs running information,
error records, etc. Parameter Configuration The inverter provides various
settable parameters. Users can set parameters via the App to meet the
requirements and optimize the performance. Communication Interface The
inverter is designed with standard RS485 communication interfaces. The
standard RS485 communication interfaces are used to establish communication
connection with monitoring devices and upload monitoring data by using
communication cables. After communication connection is established, users can
view inverter information or set inverter parameters through the iSolarCloud.
Protection Function The protective functions are integrated in the inverter,
including anti-island protection, LVRT/HVRT, DC reversed polarity protection,
AC short circuit protection, leakage current protection, DC
overvoltage/overcurrent protection, etc. PID Recovery The PID effect
(Potential Induced Degradation) of PV modules will cause serious damage to
generated output and yield, which can be avoided or recovered by PID recovery
function.
9
2 Product Description
User Manual
· For positive voltage scheme, after the PID is enabled, the voltage to ground of all PV strings is greater than 0, and therefore the PV string-to-ground voltage is a positive value.
· For negative voltage scheme, after the PID is enabled, the voltage to ground of all PV strings is lower than 0, and therefore the PV string-to-ground voltage is a negative value.
· Before enabling the PID recovery function, make sure the voltage polarity of
the PV modules to ground meets requirement. If there are any questions,
contact the PV module manufacturer or read the corresponding user manual.
· If the voltage scheme for the PID protection / recovery function does not
meet the requirement of corresponding PV modules, the PID will not work as
expected or even damage the PV modules.
· PID recovery function and Q at night cannot be enabled at the same time.
· If the PID recovery function is enabled, it only works at night.
· PID recovery function and Q at night cannot be enabled at the same time.
· After the PID recovery function is enabled, the voltage of the PV string to
ground is 500Vdc by default, and the default value can be modified through the
App.
10
3 Unpacking and Storage
3.1 Unpacking and Inspection
The device is thoroughly tested and strictly inspected before delivery.
Nonetheless, damage may still occur during shipping. For this reason, please
conduct a thorough inspection after receiving the device. · Check the packing
case for any visible damage. · Check the scope of delivery for completeness
according to the packing list. · Check the inner contents for damage after
unpacking. Contact SUNGROW or the transport company in case of any damage or
incompleteness, and provide photos to facilitate services. Do not dispose of
the original packing case. It is recommended to store the device in the
original packing case when the device is decommissioned.
3.2 Inverter Storage
Proper storage is required if the inverter is not installed immediately. ·
Store the inverter in the original packing case with the desiccant inside. ·
The storage temperature must be always between -40 and +70, and the storage
relative humidity must be always between 0 and 95 %, non-condensing. · In case
of stacking storage, the number of stacking layers should never exceed the
limit marked on the outer side of the packing case. · The packing case should
be upright. · If the inverter has been stored more than half a year, the
qualified personnel should
thoroughly check and test it before installation.
11
4 Mechanical Mounting
Respect all local standards and requirements during mechanical installation.
4.1 Safety during Mounting
Make sure there is no electrical connection before installation. In order to
avoid electric shock or other injury, make sure that holes will not be drilled
over any electricity or plumbing installations.
Risk of injury due to improper handling · Always follow the instructions when
moving and positioning the inverter. · Improper operation may cause injuries
or serious wounds. In the case of poor ventilation, the system performance may
compromise. · Keep the heat sinks uncovered to ensure heat dissipation
performance.
4.2 Location Requirements
Select an optimal mounting location for safe operation, long service life and
expected performance. · The inverter with protection rating IP66 can be
installed both indoors and outdoors. · Install the inverter at a place
convenient for electrical connection, operation, and
maintenance.
12
User Manual
4 Mechanical Mounting
4.2.1 Environment Requirements
· The installation environment must be free of inflammable or explosive
materials. · The location should be not accessible to children. · The ambient
temperature and relative humidity must meet the following
requirements.
· Do not install the inverter outdoors in areas with high salinity, which
mainly refer to the areas within 500 m away from the coast. The deposition of
salt fog varies largely with nearby seawater characteristics, sea wind,
precipitation, relative humidity, terrain, and forest coverage.
· Avoid direct exposure to sun, rain and snow.
· The inverter should be well ventilated. Ensure air circulation.
· Never install the inverter in living areas. The inverter will generate noise
during operation, affecting daily life.
4.2.2 Carrier Requirements
The concrete wall should be capable of withstanding a force of four times the
weight of the inverter and be suitable for the dimensions of the inverter. The
installation carrier should meet the following requirements:
4.2.3 Angle Requirements Install the inverter vertically or at the maximum
allowable rear tilt angle. Do not install the inverter horizontally, forward,
excessively backward, sideways, or upside down.
13
4 Mechanical Mounting
User Manual
In case the installation site is a level surface, mount the inverter to the horizontal-mounting bracket to meet the mounting angle requirements, as shown in the figure below.
Take the following items into account when designing the bracket scheme: ·
Consider onsite climate conditions and take anti-snow and anti-rain meas-
ures if necessary. · Ensure that the waterproof connectors are at least 300mm
higher than the
ground surface. · Bind the cables at the positions 300~350mm away from the DC
connector,
AC waterproof terminal, and communication waterproof terminal. · The various
waterproof terminals should be tightened in accordance with
the torque requirements in this manual to ensure that they are tight and
sealed. Contact SUNGORW if you have any question. 4.2.4 Clearance Requirements
Reserve enough clearance around the inverter to ensure sufficient space for
heat dissipation.
14
User Manual
4 Mechanical Mounting
- In case the distance is less than 800 mm, move the inverter from the mounting-bracket or wall before maintaining fans. In case of multiple inverters, reserve specific clearance between the inverters. For other installation scenarios, please refer to the relevant technical documents on http://support. sungrowpower.com/.
In case of back-to-back installation, reserve specific clearance between the two inverters.
Install the inverter at an appropriate height for ease of viewing LED indicator and operating switch(es).
4.3 Installation Tools
Installation tools include but are not limited to the following recommended ones. If necessary, use other auxiliary tools on site.
15
4 Mechanical Mounting table 4-1 Tool specification
User Manual
Goggles
Earplugs
Dust mask
Protective gloves
Insulated shoes
Utility knife
Slotted screwdriver Phillips screwdriver
(M2, M6)
(M4, M6, M8)
Hammer drill (12, 14)
Pliers
Marker
Level
Rubber mallet
Socket wrench set (16mm)
Wrench (13 mm, 16 mm)
Wrist strap
Wire cutter
Wire stripper
Hydraulic plier
Heat gun
16
User Manual
MC4 terminal crimping pliers
46mm2
MC4 terminal wrench
Multimeter 1100 Vdc
4 Mechanical Mounting
RJ45 crimping tool
Vacuum cleaner
4.4 Moving the Inverter
Before installation, remove the inverter from the packing case and move it to
the installation site. Follow the instructions below as you move the inverter:
· Always be aware of the weight of the inverter. · Lift the inverter using the
handles positioned on both sides of the inverter. · Move the inverter by one
or two people or by using a proper transport tool. · Do not release the
equipment unless it has been firmly secured. 4.4.1 Manual Transport step 1
Release the sealing screws on the mounting ears with a flat-head screwdriver
and store them properly. Anchor the four supplied screw-in handles to the
mounting ears and base of the inverter.
step 2 Lift and move the inverter to the destination by using the side and
bottom handles as well as the four installed handles.
step 3 Remove the screw-in handles and reassemble the sealing screws released
in Step 1.
Inappropriate moving operation may cause personal injury! It is recommended
that at least four installers carry the inverter together and wear protective
equipment such as smash-proof shoes and gloves. Always beware of the gravity
center of the inverter and avoid tipping.
17
4 Mechanical Mounting
User Manual
The ground surface on which the inverter is to be placed should be covered
with a sponge pad, foam cushion or the like to prevent the inverter bottom
from scratches.
– – End 4.4.2 Hoisting Transport step 1 Release the sealing screws on the
mounting ears and store them properly. Anchor two
M12 thread lifting rings to the hangers of the inverter.
step 2 Lead the sling through the two lifting rings and fasten the tie-down
strap.
step 3 Hoist the inverter, and stop to check for safety when the inverter is
100mm above the ground. Continue hoisting the device to the destination after
ensuring the safety.
step 4 Remove the lifting rings and reassemble the sealing screws released in Step 1. 18
User Manual
4 Mechanical Mounting
Keep the inverter balanced throughout the hoisting process and avoid
collisions with walls or other objects. Stop hoisting in the event of severe
weather, such as heavy rain, thick fog, or strong wind.
The lifting rings and the sling are not within the delivery scope.
– – End
4.5 Installing the mounting-bracket
Inverter is installed on the wall and bracket by means of mounting bracket.
The expansion plug set shown below is recommended for the installation.
figure 4-1 Dimensions of mounting-bracket
4.5.1 PV Bracket-Mounted Installation step 1 Assemble the mounting-bracket by
using the connecting bar.
step 2 Level the assembled mounting-bracket by using the level, and mark the
positions for drilling holes on the PV bracket. Drill the holes by using a
hammer drill.
19
4 Mechanical Mounting
step 3 Secure the mounting-bracket with bolts.
User Manual
No.
Components
A
Mounting-bracket
B
Full threaded bolt
C
Metal bracket
D
Flat washer
E
Spring washer
F
Hex nuts
Description
M10*45 M10
– – End 4.5.2 Wall-Mounted Installation step 1 Assemble the mounting-bracket by using the connecting bar.
step 2 Level the assembled mounting-bracket by using the level, and mark the
positions for drilling holes on the installation site.
step 3 Insert the expansion bolts into the holes and secure them with a rubber
hammer. Fasten the nut with a wrench to expand the bolt. Remove the nut,
spring washer, and flat washer, and store them properly.
20
User Manual
4 Mechanical Mounting
step 4 Fix the mounting-bracket with the expansion bolts.
No. A B
C
– – End
Components Wall
Expansion bolt
Mountingbracket
Description Fastening the bolt in the sequence of nut, spring washer, slat
washer
4.6 Installing the Inverter
step 1 Take out the inverter from the packing case. step 2 Hoist the inverter
to the installation position when necessary (refer to “”4.4.2 Hoisting
Transport””). If the installation position is not high enough, skip this step.
step 3 Hang the inverter to the mounting-bracket and ensure that the mounting
ears perfectly
engage with the mounting-bracket.
step 4 Fix the inverter with screws. 21
4 Mechanical Mounting
– – End
User Manual
22
5 Electrical Connection
5.1 Safety Instructions
Prior to any electrical connections, keep in mind that the inverter has dual
power supplies. It is mandatory for the qualified personnel to wear personal
protective equipments (PPE) during the electrical work.
Danger to life due to a high voltage inside the inverter! · The PV string will
generate lethal high voltage when exposed to sunlight. · Before starting
electrical connections, disconnect the DC switch and AC cir-
cuit breakers and prevent them from inadvertent reconnection. · Ensure that
all cables are voltage free before performing cable connection.
· Any improper operations during cable connection can cause device damage or
personal injury.
· Only qualified personnel can perform cable connection. · All cables must be
undamaged, firmly attached, properly insulated and ad-
equately dimensioned.
Comply with the safety instructions related to the PV strings and the
regulations related to the utility grid. · All electrical connections must be
in accordance with local and national
standards. · Only with the permission of the local utility grid company, the
inverter can be
connected to the utility grid.
5.2 Terminal Description
All electrical terminals are located at the bottom of the inverter.
23
5 Electrical Connection
User Manual
figure 5-1 Terminal Description(For a multi-core cable)
figure 5-2 Terminal Description(For four single-core cables) * The image shown
here is for reference only. The actual product received may differ. 24
User Manual
5 Electrical Connection
Item Terminal
A
PV terminals
Mark +/-
Communica- COM1 / 2 / 3 B
tion terminal COM4
AC wiring
C
terminal
Standby
AC
D
grounding
terminal*
Additional
E
grounding
terminal
Note MC4 PV connector RS485 communication, digital input/output DI/DO. For
communication module connection. Used for AC output cable connection.
Used for internal grounding.
use at least one of them to ground the inverter.
*If the PE cable is an independent single-core cable, it should be inserted into the cabinet through the standby grounding terminal.
5.3 Electrical Connection Overview
The electrical connection should be realized as follows:
Item A B C D E
Designation PV string Inverter Grid Monitoring device AC circuit breaker
25
5 Electrical Connection
User Manual
table 5-1 Cable Requirements
Specification
No. Cable
Type
Cable Diam- Cross-sectional Area
eter(mm)
(mm2)
PV cable comply-
1
DC cable ing with 1,500V
6~9
4~6
standard
Additional Outdoor single-
2
grounding core copper wire The same as that of the PE wire in the AC
cable
cable
cable
Four/Five-core
outdoor copper or
aluminum cable(1)
(2)
38 ~ 56
3
AC cable
Four single-core
outdoor copper or
aluminum cables
(1)(2)
14 ~ 32
L1,L2,L3,(N) wire: 70 ~ 240 PE wire: refer to “table 52 PE Wire Requirements” L1,L2,L3,(N) wire: 70 ~ 240 PE wire: refer to “table 52 PE Wire Requirements”
Shielded twisted
Commu- pair (terminal
4
nication block)
4.5 ~ 18
0.1 ~ 1.5
cable
CAT-5 Ethernet
cable (RJ45)
/
(1) A copper to aluminum adapter terminal is required when an aluminum cable is used. For details, refer to ” Aluminium Cable Requirements”. (2) In the case of four single-core cables, a spare AC sealing plate accessory is required as shown in the following figure. To purchase the AC sealing plate accessory, contact SUNGROW.
figure 5-3 Spare AC Sealing Plate Inverter for Australia and New Zealand are
equipped with the four-core sealing plate by default.
26
User Manual
5 Electrical Connection
table 5-2 PE Wire Requirements
PE Wire Cross Section S
PE Wire Cross Section
S > 35 mm2
S/2
Note
The specifications are valid only when the phase wire and PE wire use the same
material. If otherwise, ensure that the cross section of the PE wire produces
a conductance equivalent to that of the wire specified in the table.
5.4 Crimp OT/DT terminal
Crimp OT/DT terminal
1. Heat shrink tubing 3. Hydraulic pliers
2. OT/DT terminal 4. Heat gun
Aluminium Cable Requirements If an aluminium cable is selected, use a copper to aluminium adapter terminal to avoid direct contact between the copper bar and the aluminium cable.
27
5 Electrical Connection
User Manual
figure 5-4 Aluminium cable terminal connection sequence
1. Copper to Aluminium adapter terminal
2. Flange nut 3. Aluminium cable
Ensure that the selected terminal can directly contact with the copper bar. If
there are any problems, contact the terminal manufacturer.
Direct contact between the copper bar and the aluminium cable will cause
electrochemical corrosion and impair the reliability of electrical connection.
5.5 Additional Grounding Connection
· Since the inverter is transformerless, neither the negative pole nor the
positive pole of the PV string can be grounded. Otherwise, the inverter will
not operate normally.
· Connect the additional grounding terminal to the protective grounding point
before AC cable connection, PV cable connection, and communication cable
connection.
· The ground connection of this additional grounding terminal cannot replace
the connection of the PE terminal of the AC cable. Make sure those terminals
are both grounded reliably. SUNGROW shall not be held liable for any damage
caused by the violation.
5.5.1 Additional Grounding Requirements
All non-current carrying metal parts and device enclosures in the PV power
system should be grounded, for example, mounts of PV modules and the inverter
enclosure. When there is only one inverter in the PV system, connect the
additional grounding cable to a nearby grounding point. When there are
multiple inverters in the PV system, connect grounding points of all inverters
and the PV array frames to the equipotential cable (according to the onsite
conditions) to implement an equipotential connection.
28
User Manual
5 Electrical Connection
5.5.2 Connection Procedure step 1 Prepare the cable and OT/DT terminal,refer to ” Crimp OT/DT terminal”. step 2 Remove the screw on the grounding terminal and fasten the cable with a screwdriver.
step 3 Apply paint to the grounding terminal to ensure corrosion resistance.
The grounding screws have been anchored to the side of the inverter before
delivery, and do not need to be prepared. There are two grounding terminals.
Use at least one of them to ground the inverter.
– – End
5.6 Opening the Wiring Compartment
step 1 Release two screws on the front cover of the wiring compartment with
supplied Allen wrench.
step 2 Open the wiring compartment.
29
5 Electrical Connection
User Manual
step 3 Keep the wiring compartment open during wiring through the limit lever
attached to the cover.
– – End Close the wiring compartment in reverse order after completing wiring
operations.
5.7 AC Cable Connection
5.7.1 AC Side Requirements Connect the inverter to the grid only after getting
an approval from the local electric power company.
Before connecting the inverter to the grid, ensure the grid voltage and
frequency comply with requirements, for which, refer to “Technical Date”.
Otherwise, contact the electric power company for help.
30
User Manual
5 Electrical Connection
AC Circuit Breaker An independent circuit breaker or fuse is installed on the output side of the inverter to ensure safe disconnection from the grid.
Inverter Model SG110CX
Recommended rated voltage 400V
Recommended rated current 200A
Never connect a load between the inverter and the circuit breaker. Multiple
inverters cannot share one circuit breaker.
Multiple Inverters in Parallel Connection If multiple inverters are connected
in parallel to the grid, ensure that the total number of parallel inverters
does not exceed 25. Otherwise, please contact SUNGROW for technical scheme.
MV Transformer The MV transformer used together with the inverter should meet
the following requirements:
· The transformer may be a distribution transformer, and it must be designed
for the typical cyclical loads of a PV system (load in the day and no load at
night).
· The transformer may be of the liquid-immersed type or dry type, and shield
winding is not necessary.
· The line-to-line voltage on the LV side of the transformer should endure the
output voltage of inverter. When the transformer is connected to the IT grid,
to-ground withstanding voltage of the LV winding of the transformer, the LV
side AC cables, and the LV side secondary equipment (including the relay
protection device, detection & measuring device, and other related auxiliary
devices) should not be lower than 1,100V.
· The line-to-line voltage on the HV side of the transformer should comply
with the local power grid voltage.
· A transformer with a tap changer on the HV side is recommended in order to
keep consistent with the grid voltage.
· At an ambient temperature of 45, the transformer can run in 1.1 times of
load for long time.
· A transformer with a short-circuit impedance 6% (permissible tolerance:
±10%) is recommended.
· The voltage drop of system cable is no more than 3%. · The DC component that
the transformer can withstand is 1% of the fundamental cur-
rent at rated power.
31
5 Electrical Connection
User Manual
· For thermal rating, the load curve of the transformer and environment
conditions should be taken into account.
· The apparent power of the inverter should never exceed the power of the
transformer. The maximum AC current of all inverters connected in parallel
must be taken into account. If more than 25 inverters are connected to the
grid, contact SUNGROW.
· The transformer must be protected against overloading and short circuit.
· The transformer is an important part of grid-connected PV generation system.
The fault tolerance capacity of the transformer should be taken into account
at all times. The fault include: system short circuit, grounding fault,
voltage drop, etc.
· Take ambient temperature, relative humidity, altitude, air quality, and
other environmental conditions into account when selecting and installing the
transformer.
5.7.2 Requirements for OT/DT Terminal
OT/DT terminals (not included in the delivery scope) are required for fixing
AC cables to the terminal block. Purchase the OT/DT terminals according to the
following requirements. OT/DT Terminals of Phase Wire
· Specification: M12;
· Dimensions: a46 mm / 13 mmb15.5 mm / c22 mm
OT/DT Terminal of PE Wire · Specification: M8 / M10. 5.7.3 Connection
Procedure(For a multi-core cable)
In this manual, description is given by using five-core cable as an example.
The wiring of the four-core cable is the same.
step 1 Open the wiring compartment. For details, refer to “5.6 Opening the
Wiring Compartment”.
step 2 Disconnect the AC-side circuit breaker and prevent it from inadvertent
reconnection. step 3 Loosen the swivel nut of the AC waterproof connector and
select a seal according to
the cable outer diameter, remove the inner sealing ring if the cable diameter
is larger than 47 mm. Lead the cable through the swivel nut, seal, and wiring
terminal successively.
32
User Manual
5 Electrical Connection
step 4 Remove the protection cover and store the released screws properly.
step 5 Strip the protection layer and insulation layer by specific length, as
described in the figure below.
step 6 Make the cable and crimp OT/DT terminal. step 7 Secure the wires to
corresponding terminals.
Note the terminal positions of PE wire and N wire. If a phase wire is
connected to the PE terminal or N terminal, unrecoverable damage may be caused
to the inverter.
33
5 Electrical Connection
User Manual
Ensure that the depth L of the socket used is not less than 28mm.
step 8 Gently pull the cable backwards to ensure firm connection, and fasten
the swivel nut clockwise.
34
User Manual
5 Electrical Connection
If the PE cable is an independent single-core cable, it should be inserted into the cabinet through the standby grounding terminal.
step 9 Install the protection cover
– – End 5.7.4 Connection Procedure(L1/L2/L3/N, For four single-core cables)
step 1 Open the wiring compartment. For details, refer to”5.6 Opening the
Wiring
Compartment”. step 2 Disconnect the AC-side circuit breaker and prevent it
from inadvertent reconnection. step 3 Loosen the swivel nut of the AC
waterproof connector and select a seal according to
the cable outer diameter, remove the inner sealing ring if the cable diameter
is larger than 22 mm. Lead the cable through the swivel nut, seal, and wiring
terminal successively.
35
5 Electrical Connection
User Manual
step 4 Remove the protection cover and store the released screws properly.
step 5 Strip the protection layer and insulation layer by specific length, as
described in the figure below.
step 6 Make the cable and crimp OT/DT terminal. step 7 Secure the wires to
corresponding terminals.
Note the terminal positions of PE wire and N wire. If a phase wire is
connected to the PE terminal or N terminal, unrecoverable damage may be caused
to the inverter. 36
User Manual
5 Electrical Connection
Ensure that the depth L of the socket used is not less than 28mm.
step 8 Gently pull the cable backwards to ensure firm connection, and fasten
the swivel nut clockwise.
step 9 Install the protection cover 37
5 Electrical Connection
User Manual
– – End
5.7.5 Connection Procedure(L1/L2/L3/PE, For four single-core cables)
step 1 Open the wiring compartment. For details, refer to”5.6 Opening the
Wiring Compartment”.
step 2 Disconnect the AC-side circuit breaker and prevent it from inadvertent
reconnection.
step 3 Loosen the swivel nut of the AC waterproof connector and select a seal
according to the cable outer diameter, remove the inner sealing ring if the
cable diameter is larger than 22 mm . Lead the cable through the swivel nut,
seal, and wiring terminal successively.
step 4 Remove the protection cover and store the released screws properly. 38
User Manual
5 Electrical Connection
step 5 Strip the protection layer and insulation layer by specific length, as
described in the figure below.
step 6 Make the cable and crimp OT/DT terminal. step 7 Secure the wires to
corresponding terminals.
39
5 Electrical Connection
User Manual
Ensure that the depth L of the socket used is not less than 28mm.
step 8 Gently pull the cable backwards to ensure firm connection, and fasten the swivel nut clockwise.
step 9 Install the protection cover – – End
40
User Manual
5.8 DC Cable Connection
5 Electrical Connection
Danger of electric shock! The PV array will generate lethal high voltage once exposed to sunlight.
Make sure the PV array is well insulated to ground before connecting it to the inverter.
Risk of inverter damage! Observe the following requirements. Failure to do so
will void guarantee and warranty claims.
· Make sure the maximum DC voltage and the maximum short circuit current of
any string never exceed inverter permitted values specified in “Technical
Data”.
· Mixed use of different brand or model of PV modules in a PV string or a
compromised PV string design composed with PV modules from rooftoops of
different orientation may not damage inverter but will cause system bad
performance!
· The inverter enters standby state when the input voltage ranges between
1,000 V and 1,100 V. The inverter returns to running state once the voltage
returns to the MPPT operating voltage range, namely, 200 V to 1,000 V.
5.8.1 PV Input Configuration
As shown in the figure below, the inverter is provided with multiple PV
inputs: PV inputs 1~9; and each PV input is designed with an MPP tracker. Each
PV input operates independently and has its own MPPT. In this way, string
structures of each PV input may differ from each other, including PV module
type, number of PV modules in each string, angle of tilt, and installation
orientation. Each PV input area includes two DC inputs DC1 and DC2. For the
best use of DC power, DC1 and DC2 should be the same in PV string structure,
including the type, number, tilt, and orientation of the PV modules.
41
5 Electrical Connection
User Manual
Type SG110CX
Open Circuit Voltage Limit 1100V
5.8.2 Assembling the PV Connectors
Max. Current for Input Connector 30A
High voltage may be present in the inverter! · Ensure all cables are voltage- free before performing electrical operations. · Do not connect the AC circuit breaker before finishing electrical connection.
· Use MC4 DC terminals if the maximum input voltage is no more than 1,000 V.
· Use MC4-Evo2 DC terminals if the maximum input voltage is greater than 1,000
V. To purchase the MC4-Evo2 DC terminals, contact SUNGROW.
· Select appropriate DC terminals as required above. Otherwise, SUNGROW shall
be held no liability for the damage caused.
42
User Manual
5 Electrical Connection
SUNGROW provides corresponding PV connectors in the scope of delivery for
quick connection of PV inputs. To ensure IP66 protection, use only the
supplied connector or the connector with the same ingress of protection.
step 1 Strip 7 mm8 mm of the insulation from each PV cable.
step 2 Assemble the cable ends with the crimping pliers.
1: Positive crimp contact
2Negative crimp contact
step 3 Lead the cable through cable gland, and insert the crimp contact into the insulator until it snaps into place. Gently pull the cable backward to ensure firm connection. Tighten the cable gland and the insulator (torque 2.5 N.m to 3 N.m).
step 4 Check for polarity correctness.
If the PV polarity is reversed, the inverter will be in a fault or alarm state
and will not operate normally. – – End
43
5 Electrical Connection
5.8.3 Installing the PV Connector step 1 Rotate the DC switch to “OFF”
position.
User Manual
step 2 Check the cable connection of the PV string for polarity correctness and ensure that the open circuit voltage in any case does not exceed the inverter input limit of 1,100V.
step 3 Connect the PV connectors to corresponding terminals until there is an audible click.
· Check the positive and negative polarity of the PV strings, and connect the
PV connectors to corresponding terminals only after ensuring polarity
correctness.
· Arc or contactor over-temperature may occur if the PV connectors are not
firmly connected in place, and SUNGROW shall not be held liable for any damage
caused due to this operation.
step 4 Follow the foregoing steps to connect PV connectors of other PV
strings. step 5 Seal any unused PV terminal with a terminal cap.
44
User Manual
5 Electrical Connection
If the DC input is connected inversely and the DC switch has been rotated to
“ON”, do not operate immediately. Otherwise, the equipment may be damaged.
Please turn the DC switch to “OFF” and remove the DC connector to adjust the
polarity of the strings when the string current is lower than 0.5A.
– – End
5.9 RS485 Connection
5.9.1 Interface Description The following figure shows the position of the
communication wiring board as well as the terminals equipped for the wiring
board.
The inverter is equipped with two groups of RS485 communication port for external communication connection, which are RS485_1 port and RS485_2 port. The port RS485_1 is used to connect Logger, so as to implement data exchange with PC or other monitoring devices. Terminal definitions of the port are as follows:
table 5-3 RS485_1 port terminal definition (Terminal block)
No
Definition
A1
RS485 A IN, RS485A differential signal+
B1
RS485 B IN, RS485B differential signal-
PE
GND, shielded earthing point
A1
RS485 A OUT, RS485A differential signal+
B1
RS485 B OUT, RS485B differential signal-
PE
GND, shielded earthing point
45
5 Electrical Connection
User Manual
table 5-4 RS485_1 port terminal definition (RJ45)
No PIN1~2 PIN3 PIN4~5 PIN6 PIN7~8
Definition N/A RS485 B, RS485B differential signalN/A RS485 A, RS485A differential signal+ N/A
The terminal block interface and RJ45 interface have the same function with different wiring manner. Select either interface for cable connection. When multiple inverters are connected in the RS485 daisy chain, a 120 terminating resistor can be connected between the A and B communication cables through the RS485-dip switch, to ensure communication quality.
The RS485_1 interface is marked as SW1.
5.9.2 RS485 Communication System Single-inverter Communication System In case
of a single inverter, communication cable connection requires only one RS485
cable.
Multi-inverter Communication System In case of multiple inverters, all the
inverters can be connected via RS485 cables in the daisy chain manner.
46
User Manual
5 Electrical Connection
figure 5-5 Multi-inverter Communication SystemRS485_1 InterfaceTerminal Block
figure 5-6 Multi-inverter Communication SystemRS485_1 InterfaceRJ45 When more
than 15 inverters are connected to the same daisy chain, in order to ensure
the communication quality, the Logger at the first end of the daisy chain
needs to be equipped with a terminal resistor of 120, the inverter at the last
end needs to be equipped with a RS485-dip switch (SW1), and the shielding
layer of the communication cable should be single-point grounded.
47
5 Electrical Connection
User Manual
figure 5-7 Configuration of Dip Switch (N15) The length of the RS485 cable and
twisted pair cable should be no longer than 1,200m. If multiple inverters are
connected to the data collector Logger3000, the number of permissible daisy
chains and the number of devices allowed to be connected should meet the
requirements (refer to the user manual for the Logger3000).
5.9.3 Connection Procedure(Terminal Block) RS485 communication cables should
be shielded twisted pair cables or shielded twisted pair Ethernet cables.
There are three communication terminals, and the silkscreen marks are
COM1/COM2/COM3. Please choose according to the actual situation.
step 1 Strip the protection layer and insulation layer by appropriate length.
step 2 Loosen the swivel nut of the junction box and select an appropriate
seal according to cable outer diameter. Lead the cable through the swivel nut,
seal, and junction box successively.
48
User Manual
5 Electrical Connection
Outer Diameter D(mm) 4.5 ~ 6 6 ~ 12 12 ~ 18
Seal c a+b b
step 3 Secure the cable to the terminal base.
step 4 Insert the terminal base into the corresponding terminal. step 5 Pull the cable gently to make sure it is secured, tighten the swivel nut clockwise.
– – End 5.9.4 Connection Procedure (RJ45 Ethernet Port) step 1 Loosen the
swivel nut of the junction box and select an appropriate seal according to
cable outer diameter. Lead the cable through the swivel nut, seal, and
junction box successively.
49
5 Electrical Connection
User Manual
Outer Diameter D(mm) 4.5 ~ 6 6 ~ 12 12 ~ 18
Seal c a+b b
step 2 Strip the insulation layer of the Ethernet cable with a wire stripper, and insert the signal wires to the RJ45 connector(Pin 3 and Pin 6 are for communication connection). Crimp the RJ45 connector with a crimping tool.
step 3 Insert the RJ45 connector to the RJ45 jack. step 4 Pull the cable gently to make sure it is secured, tighten the swivel nut clockwise. 50
User Manual
5 Electrical Connection
– – End
5.10 Dry Contact Connection
Dry contact cables require a cross section of 1 mm2 to 1.5 mm2. The connection
procedure of the dry contact is the same as that of the RS485 terminal block.
5.10.1 Dry Contact Function The configuration circuit board is provided with
fault output dry contact and emergency stop dry contact, as shown in the
figure below. Connection method of the dry contacts is similar to that of the
RS485 terminal block.
DO terminal (fault output dry contact): The relay can be set to output fault
alarms, and user can configure it to be a normally open contact (COM NO) or a
normally closed contact (COMNC). The relay is initially at the NC terminal,
and it will trip to another contact when a fault occurs. When alarm occurs,
signal status change will not be triggered. Use LED indicators or other
equipment to indicate whether the inverter is in the faulty state. The
following Figures show the typical applications of normally open contact and
normally closed contact:
51
5 Electrical Connection
User Manual
figure 5-8 Normal open contact
figure 5-9 Normal close contact
Devices connected to the relay should comply with related requirements:
AC-Side Requirements Max. voltage: 125Vac Max. current: 5A
DC-Side Requirements Max. voltage: 30Vdc Max. current: 5A
DI terminal (emergency stop dry contact): the dry contact can be configured to be an emergency stop contact. When the DI + contact and DIcontact are shorted by external controlled switch (The external switch can be configured as normally open contact or normally closed contact), the inverter will immediately shutdown. NS terminal: NS Protection is used for German market currently. For plant sized more than 30kVA, inverter NS Protection terminals could be used in daisy chain to external NS Protection Relay to realize emergency stop when NS Protection Relay change its dry contact status due to the grid abnormal running status. NS Protection (including Passive Valid) can be set. When NS Protection is enabled on the iSolarCloud, the inverters will operate normally when DI + contact and DIcontact are shorted by external controlled switch, and the inverters will emergently stop when DI + contact and DI contact are disconnected.
The dry contacts only support passive switch signal input.
The following figure shows the typical application of local stop dry contact.
52
User Manual
5 Electrical Connection
figure 5-10 Local stop contact
figure 5-11 Daisy chain topology When wiring DI dry contacts, ensure that the
maximum wiring distance meet the requirements in “10.2 Wring Distance of DI
Dry Contact”.
5.10.2 Wiring Procedure Refer to the wiring of terminal block described in
chapter”5.9.3 Connection Procedure (Terminal Block)” to implement fault
output, emergency shutdown and NS protection. For NS protection(including
passive valid), enable the function on iSolarCloud, refer to “7.8.2 Operation
Parameters”.
5.11 DRM ConnectionFor Countries “AU” and “NZ”
5.11.1 DRM Function The inverter supports the demand response modes as
specified in the standard AS/NZS 4777. The inverter has integrated a terminal
for connecting to a DRED. After the connection, the method of asserting DRMs
as specified in the follow table.
53
5 Electrical Connection
User Manual
The mode DRM0 is supported by the inverter.
table 5-5 Method of Asserting DRMs
Mode DRM0
Method of Asserting Asserted by shorting pins 5 and 6 Asserted when the impedance between pins 5 and 6 is detected to be above 20k
Enable the DRM function through the iSolarCloud APP. If there are any
problems, contact SUNGROW. The DRM function is only applicable to devices for
Australia and New Zealand.
5.11.2 Connection Procedure step 1 Strip the insulation layer of the Ethernet
cable with a wire stripper, and insert the signal
wires to the RJ45 connector. Crimp the RJ45 connector with a crimping tool.
step 2 Loosen the swivel nut and select an appropriate seal according to cable outer diameter. Lead the cable through the swivel nut, and seal successively.
Outer Diameter D (mm)
4.5 ~ 6 6 ~ 12 13 ~ 18
Seal
c a+b b
54
User Manual
step 3 Insert the RJ45 connector to the RJ45 jack.
5 Electrical Connection
step 4 Pull the cable gently to make sure it is secured, tighten the swivel
nut clockwise. – – End
5.12 Closing the Wiring Compartment
step 1 Release the limit lever.
step 2 Close the wiring compartment and tighten the two screws on its front cover with supplied Allen wrench.
– – End 55
5 Electrical Connection
5.13 Communication Module Connection (optional)
User Manual
Connect the communication module produced by SUNGROW to the communication accessory port. After successful connection, information such as power generation and running state of the inverter can be viewed via the APP on the phone.
*The image shown here is for reference only. The actual product you receive may differ.
Once the communication module is in use, do not connect the inverter to a 3rd
party data logger at the same time via RS485.
For details on module installation and configuration, refer to the manual
delivered together with the module.
56
6 Commissioning
6.1 Inspection before Commissioning
Check the following items before starting the inverter: · All equipment has
been reliably installed. · DC and AC switches are in the “OFF” position. · The
ground cable is properly and reliably connected. · The AC cable is properly
and reliably connected. · The DC cable is properly and reliably connected. ·
The communication cable is properly and reliably connected. · The vacant
terminals are sealed. · No foreign items, such as tools, are left on the top
of the machine or in the junction
box (if there is). · The AC circuit breaker is selected in accordance with the
requirements of this man-
ual and local standards. · All warning signs & labels are intact and legible.
6.2 Commissioning Procedure
If all of the items mentioned above meet the requirements, proceed as follows
to start up the inverter for the first time. step 1 Connect the AC switch
between the inverter and the grid. step 2 Rotate the DC switch of the inverter
to “ON” position. step 3 Connect the DC switch (if applicable) between the
inverter and the PV string. step 4 Set initial protection parameters via the
iSolarCloud App. For details, please refer to “7.2 Installing the App”, and
“7.4.2 Login Procedure”. If the irradiation and grid conditions meet
requirements, the inverter will normally operate. step 5 Observe the LED
indicator to ensure that the inverter operates normally. Refer to “2.4 LED
Indicator” for details. – – End
57
7 iSolarCloud App
7.1 Brief Introduction
The iSolarCloud App can establish communication connection to the inverter via
the Bluetooth, thereby achieving near-end maintenance on the inverter. Users
can use the App to view basic information, alarms, and events, set parameters,
or download logs, etc. *In case the communication module Eye, WiFi or WiNet-S
is available, the iSolarCloud App can also establish communication connection
to the inverter via the mobile data or WiFi, thereby achieving remote
maintenance on the inverter.
· This manual describes only how to achieve near-end maintenance via the
Bluetooth connection. For remote maintenance through the Eye, WiFi or WiNet-S,
refer to the related manuals in the delivery scope.
· Screenshots in this manual are based on the Android system V2.1.6 , and the
actual interfaces may differ.
7.2 Installing the App
Method 1 Download and install the App through the following application
stores: · MyApp (Android, mainland China users) · Google Play (Android, users
other than mainland China ones) · App Store (iOS) Method 2 Scan the following
QR code to download and install the App according to the prompt information.
The App icon appears on the home screen after installation.
58
User Manual
7 iSolarCloud App
7.3 Function Overview
The App provides parameter viewing and setting functions, as shown in the
following figure.
figure 7-1 App function tree map
7.4 Login
7.4.1 Requirements The following requirements should be met: · The AC or DC
side of the inverter is powered-on. · The mobile phone is within 5 meters away
from the inverter and there are no obstructions in between. · The Bluetooth
function of the mobile phone is enabled.
7.4.2 Login Procedure step 1 Open the App to enter the login page, click on
“Local Access” at the bottom of the page
to go to the next page. step 2 Click on “Bluetooth”, after which the Bluetooth
search screen pops up automatically,
and select the to-be-connected inverter according the SN on the nameplate of
the inverter. The Bluetooth indicator gets on once the connection is
established. Alternatively, tap to scan the QR code on the side of the
inverter to establish Bluetooth connection.
59
7 iSolarCloud App
User Manual
figure 7-2 Bluetooth Connection step 3 Enter the login screen after the
Bluetooth connection is established.
figure 7-3 Login The username is “user”and the initial password is “pw1111” or
“111111” which should be changed for the consideration of account security. To
set inverter parameters related to grid protection and grid support, contact
SUNGROW to obtain the advanced account and corresponding password. step 4 If
the inverter is not initialized, you will enter the quick setting screen of
initializing protection parameter. After finishing setting on the quick
setting screen, click “TURN ON DEVICE” and the device will be initialized. The
App will send start instructions and the device will start and operate.
60
User Manual
7 iSolarCloud App
figure 7-4 Initialization Protection Parameter
Reset the protection parameters if the country setting is incorrect.
Otherwise, a fault may occur.
In the European region, such as Sweden, Ireland, Hungary, Portugal, Romania,
Greece, Ukraine etc. whose grid code complies with EN50549, select the
parameter EN50549_1 (LV grid- connection) or EN50549_2 (MV grid-connection)
with proper manual settings. In the Brazilian region, set the country code as
“Brazil”. Selecting “Brazil_230” or “Brazil_240” will cause setting failure.
step 5 If the inverter is initialized, the App automatically turns to its home
page. – – End
7.5 Home page
After login, the home page is as follows:
61
7 iSolarCloud App
User Manual
figure 7-5 Home Page
table 7-1 Home Page Description
No.
Designation
Description
1
Date and time
System date and time of the inverter.
Present operation state of the inverter. For details, refer
2
Inverter state
to “table 7-2 Description of Inverter State”.
3
PID state
Present state of the PID. For details, refer to “table 7-3 Description of PID State”.
Displays the PV power generation power, feed-in power,
etc. The line with an arrow indicates energy flow be-
4
Power flow chart tween connected devices, and the arrow pointing indi-
cates energy flow direction.
Power
5
generation
Today power yield and accumulative power yield of the inverter.
6
Real-time power Output power of the inverter.
Shows the change of power between 5 am and 23 pm
every day
7
Power curve
(Each point on the curve represents the percentage of
present inverter power to rated power).
8
Navigation bar Including “Home”, “Run-info”, “His-record”, and “More”.
62
User Manual
7 iSolarCloud App
table 7-2 Description of Inverter State
State
Description
After being energized, the inverter tracks the PV arrays’ maximum
Run
power point (MPP) and converts the DC power into AC power. This is
the normal operation mode.
Stop
The inverter is stopped.
Press to Shut Down
The inverter will stop operation by manually “stop” via app. In this way, inverter internal DSP stops. To restart the inverter, manually start via app.
Standby
Inverter enters standby mode when DC side input is insufficient. In this mode the inverter will wait within the standby duration.
Initial standby The inverter is in the initial power-on standby state.
Starting Up The inverter is initializing and synchronizing with the grid.
Warn Run Derating running
Warning information is detected. The inverter derates actively due to environmental factors such as temperature or altitude
Dispatch Running
The inverter runs according to the scheduling instructions received from the monitoring background
Fault
If a fault occurs, the inverter will automatically stop operation, and disconnect the AC relay. The fault information will be displayed in the app. Once the fault is removed in recovery time, the inverter will automatically resume running.When the country setup is German HV, which is complied with VDE-AR-4120, the inverter will not be automatically connected to the grid after the fault is cleared, and needs to wait for an external signal to trigger reconnection.
table 7-3 Description of PID State
State PID recovery running PID abnormity
Description
The inverters perform PID recovery actively.
It is detected that the ISO impedance is abnormal or the PID cannot work
normally after the PID being enabled.
If the inverter is running abnormally, the alarm or fault icon will be displayed in the lower right corner of the inverter icon in power flow chart. The user can tap this icon to enter the alarm or fault screen to view detailed information and corrective measures.
63
7 iSolarCloud App
7.6 Run Information
User Manual
Tap Run Information on the navigation bar to enter the screen showing running information, slide the screen upwards to view all detailed information.
table 7-4 Run Information
Classifica- Parameter tion
PV Information
String n Voltage String n current
Total On-grid Run-
ning Time
Daily On-grid Running Time
Negative Voltage to Ground
Inverter Information
Input Output
Bus Voltage
Internal Air Temperature Array Insulation Resistance Country Information Power
Limitation Mode Reactive Power Mode Total DC Power MPPT x Voltage
MPPT x Current Daily Yield Monthly Yield Annual Yield Total Active Power Total
Reactive Power Total Apparent Power Total Power Factor Gird Frenquency
Description
The input voltage of the nth string The input current of the nth string
/
/
Inverter DC side negative to ground voltage value Voltage between the positive
and negative poles of the DC side of the inverter
/
Insulation resistance value of the input side to the protection ground /
/
/
DC side total input power The input voltage of the xth MPPT The input current
of the xth MPPT / / / Current active power value of the inverter
Current reactive power value of the inverter
Current apparent power value of the inverter
Power factor of the AC side of the inverter Frequency of the AC side of the
inverter
64
User Manual
Classification
Parameter
A-B Line Voltage B-C Line Voltage C-A Line Voltage Phase A Current Phase B
Current Phase C Current
Description Line Voltage Phase Current
7 iSolarCloud App
7.7 Records
Tap Records on the navigation bar to enter the screen showing event records,
as shown in the following figure.
figure 7-6 Records Fault Alarm Record Tap Fault Alarm Record to enter the screen, as shown in the following figure.
figure 7-7 Fault Alarm Record
Click to select a time segment and view corresponding records. The inverter
can record up to 400 latest entries.
Select one of the records in the list and click the record, to view the
detailed fault info as shown in following figure.
65
7 iSolarCloud App
User Manual
figure 7-8 Detailed Fault Alarm Information Yield Record Tap Yield Record to enter the screen showing daily power generation , as shown in the following figure.
figure 7-9 Power Curve
The App displays power generation records in a variety of forms, including daily power generation graph, monthly power generation histogram, annual power generation histogram and total power generation histogram.
table 7-5 Explanation of Power Yields Records
Parameter Power curve
Description Shows the power output from 5 am to 11 pm in a single day. Each point on the curve is the percentage of present power to rated power.
Daily energy histogram
Shows the power output every day in the present month.
66
User Manual
7 iSolarCloud App
Parameter Monthly energy histogram Annual energy histogram
Description Shows the power output every month in a year. Shows the power output every year.
Tap the time bar on the top of the screen to select a time segment and view
the corresponding power curve. Swipe left to check the power yields histogram.
Event Record Tap Event Record to view event record list.
Click to select a time segment and view corresponding records. The inverter can at most record the latest 400 events.
7.8 More
Tap More on the navigation bar to enter the corresponding screen, as shown in
the following figure.
figure 7-10 More
7.8.1 System Parameters Tap SettingsSystem Parameters to enter the
corresponding screen, as shown in the following figure.
67
7 iSolarCloud App
User Manual
figure 7-11 System Parameters Boot/Shutdown Tap Boot/Shutdown to send the
boot/shutdown instruction to the inverter. For Australia and New Zealand, when
the DRM state is DRM0, the “Boot” option will be prohibited. Date/Time The
correct system time is very important. Wrong system time will directly affect
the data logging and power generation value. The clock is in 24-hour format.
7.8.2 Operation Parameters Running Time Tap SettingsOperation
ParametersRunning Time to enter the corresponding screen, on which you can set
“Running Time”.
figure 7-12 Running Time PID Parameters Tap SettingsOperation ParametersPID
Parameters to enter the corresponding screen, on which you can set “PID
Parameters”.
68
User Manual
7 iSolarCloud App
figure 7-13 PID Setting
table 7-6 PID Parameter Description
Parameter PID Recovery
Clear PID alarm PID Scheme
Description Set enabling/disabling of the PID night recovery function. PID night recovery function operates between 22:00 pm and 5:00 am by default. If ISO impedance abnormality or PID function exception is detected during running of the PID function, the inverter reports a PID false alarm and reminds the user to take corresponding measures. After processing, clear the alarm via this parameter. Apply negative or positive voltage.
After the PID night recovery function is enabled, the fault indicator on the
inverter front panel turns green.
AFCI Parameters(Optional) Tap SettingsOperation ParametersAFCI Parameters to
enter the corresponding screen, on which you can set “AFCI Parameters”.
figure 7-14 AFCI Setting NS Protection(Passive Valid) Tap SettingsOperation ParametersRegular Parameters to enter the corresponding screen, on which you can set the “NS Protection(Passive Valid)”.
69
7 iSolarCloud App
User Manual
figure 7-15 NS Protection(Passive Valid)
7.8.3 Power Regulation Parameters Active Power Regulation Tap SettingsPower
Regulation ParametersActive Power Regulation to enter the screen, as shown in
the following figure.
figure 7-16 Active Power Regulation
table 7-7 Active Power Regulation
Parameter
Definition/Setting Description
Range
Active power soft start after fault
The switch for enabling/disabling the soft start function after a fault occurs.
Enable/Disable
Active power soft start time after fault
Time that the soft start takes to raise the power from 0 to 100% rated power.
1s~1200s
Active power gradient control
Switch for enabling/disabling the active power rate settable function.
Enable/Disable
Active power decline gradient
The decline rate of inverter active power per minute.
3%/min~6000%/min
70
User Manual
7 iSolarCloud App
Parameter
Definition/Setting Description
Range
Active power rising gradient
The rise rate of inverter active 3%/min~6000%/min power per minute.
Active power setting persistence
Switch for enabling/disabling the function of saving output limited power.
Enable/Disable
Active power limit
The switch for limiting output Enable/Disable power.
Active power limit ratio
The ratio of limiting output power to rated power in percentage.
0%~110%
Shutdown when active power limit to 0%
Switch used to determine whether the inverter is in stop state when the limited power reaches 0.
Enable/Disable
Reactive Power Regulation Tap SettingsPower Regulation ParametersReactive Power Regulation to enter the screen, as shown in the following figure.
71
7 iSolarCloud App
User Manual
figure 7-17 Reactive Power Regulation
table 7-8 Reactive Power Regulation
Parameter
Definition/Setting Description
Range
Reactive power gener- Switch for enabling/disabling Enable/Disable
ation at night
Q at night function.
Reactive power ratio at Reactive power ratio set for
night
the Q at night function.
-100%~0%/ 0%~100%
Reactive power setting persistence
Switch for enabling/disabling the power-off function during reactive power.
Enable/Disable
Reactive power regula- — tion mode
Reactive power regulation
Switch for enabling/disabling reactive response function.
Off/PF/Qt/Q(P)/Q(U) Enable/Disable
Reactive power regula- Ends time of reactive
tion time
response.
0.1s~600.0s
Q(P)Curve
Select corresponding curve Curve A/Curve B/Curve C* according to local regulations
QP_P1
Output power at P1 on the Q (P) mode curve (in percentage)
10.0%~100.0%
QP_P2
Output power at P2 on the Q (P) mode curve (in percentage)
20.0%~100.0%
72
User Manual
Parameter QP_P3 QP_K1
QP_K2
QP_K3
QP_EnterVoltage QP_ExitVoltage QP_EXitPower QP_EnableMode Q(U)Curve QU_V1
QU_Q1
7 iSolarCloud App
Definition/Setting Description
Range
Output power at P3 on the Q (P) mode curve (in percentage)
20.0%~100.0%
Power factor at P1 on the Q (P) mode curve
Power factor at P2 on the Q (P) mode curve
Power factor at P3 on the Q (P) mode curve
Voltage percentage for Q(P) function activation Voltage percentage for Q(P)
function deactivation Power percentage for Q(P) function deactivation
Unconditional activation/deactivation of Q(P) function
Curve A/Curve C:0.800~1.000 Curve B: [-0.600~0.600] Active Overload Rate/
1000 Curve A/Curve C: 0.800~1.000 Curve B: [-0.600~0.600] Active Overload
Rate/ 1000 Curve A/Curve C: 0.800~1.000 Curve B: [-0.600~0.600] *Active
Overload Rate/ 1000 100.0%~110.0%
90.0%~100.0%
1.0%-20.0%
Yes/No
Select the corresponding curve according to local regulations
Curve A/Curve B/Curve C*
Pre-set grid voltage U1 that is reactive according to the grid voltage
80.0%~100.0%
Pre-set proportion of reactive power according to the grid voltage U1
[-60.0%-0]* Overload Rate/1000
73
7 iSolarCloud App
User Manual
Parameter
Definition/Setting Description
Range
QU_V2
Pre-set grid voltage U2 that is reactive according to the grid voltage.
80.0%~100.0%
QU_Q2
Pre-set proportion of reactive power according to the grid voltage U2.
[-60.0%-60.0%]* Overload Rate/1000
QU_V3
Pre-set grid voltage U3 that is reactive according to the grid voltage.
100.0%~120.0%
QU_Q3
Pre-set proportion of reactive power according to the grid voltage U3.
[-60.0%-60.0%]* Overload Rate/1000
QU_V4
Pre-set grid voltage U4 that is reactive according to the grid voltage.
100.0%~120.0%
QU_Q4
Pre-set proportion of reactive power according to the grid voltage U4.
[0-60.0%]* Overload Rate/ 1000
QU_EnterPower QU_EXitPower QU_EnableMode QU_Limited PF Value
Active power for Q(U) function activation
Active power for Q(U) function deactivation
Unconditional activation/deactivation of Q(U) function
—
20.0%~100.0% 1.0%~20.0% Yes/No/Yes,Limited by PF 0-0.95
**Curve C is reserved and consistent with Curve A currently.
74
User Manual
7 iSolarCloud App
figure 7-18 Q(U) Curve
figure 7-19 Q(P) Curve
7.8.4 Communication Parameters Tap SettingsCommunication Parameters to enter
the corresponding screen, as shown in the following figure. The device address
ranges from 1 to 246.
figure 7-20 Communication Parameters
7.8.5 Firmware Update To avoid download failure due to poor on-site network
signal, it is recommended to download the firmware package to the mobile
device in advance. Perform firmware update only during high irradiance
conditions in order to prevent equipment failure.
step 1 Enable the “Mobile data” of the mobile device. step 2 Open the App,
enter the account and password on the login screen. Tap Login to enter
the home screen. step 3 Tap MoreFirmware Download to enter corresponding
screen on which you can view
the device list.
75
7 iSolarCloud App
User Manual
step 4 Select the device model before downloading the firmware. Tap the device name in the
device list to enter the firmware upgrade package detail interface, and tap the firmware upgrade package to download it.
behind
step 5 Return to the Firmware Download screen, tap in the upper right corner
of the screen to view the downloaded firmware upgrade package.
step 6 Login the App via local access mode. Refer to “7.4 Login”. step 7 Tap
More on the App home screen and then tap Firmware Update. step 8 Tap the
upgrade package file, a prompt box will pop up asking you to upgrade the firm-
ware with the file, tap CONFIRM to perform the firmware upgrade.
step 9 Wait for the file to be uploaded. When the upgrade is finished, the
interface will inform you of the upgrade completion. Tap Complete to end the
upgrade.
– – End 7.8.6 Password Changing
Tap Modify Password to enter the modify password screen, as shown in the
following figure.
76
User Manual
7 iSolarCloud App
figure 7-21 Change Password The password shall consisit of 820 digits, including letters and numbers.
77
8 System Decommissioning
8.1 Disconnecting the Inverter
For maintenance or other service work, the inverter must be switched off.
Proceed as follows to disconnect the inverter from the AC and DC power
sources. Lethal voltages or damage to the inverter will follow if otherwise.
step 1 Disconnect the external AC circuit breaker and secure it against
reconnection. step 2 Rotate the DC switch to the “OFF” position for
disconnecting all of the PV string inputs. step 3 Wait about 5 minutes until
the capacitors inside the inverter completely discharge. step 4 Ensure that
the DC cable is current-free via a current clamp. step 5 Insert a MC4 wrench
into the notch and press the wrench with an appropriate force to remove the DC
connector.
step 6 Ensure that the AC wiring terminals are voltage-free via a multimeter,
and remove the AC wires and communication wires.
step 7 Install the MC4 waterproof plugs. For further disconnection and
reconnection instructions, please visit the webpage of respective component
manufacturer.
– – End
8.2 Dismantling the Inverter
Risk of burn injuries and electric shock! Do not touch any inner live parts
until for at least 5 minutes after disconnecting the inverter from the utility
grid and the PV input.
78
User Manual
8 System Decommissioning
step 1 Refer to “5 Electrical Connection” for the inverter disconnection of
all cables in reverse steps.
step 2 Dismantle the inverter referring to “4 Mechanical Mounting” in reverse
steps. step 3 If necessary, remove the wall-mounting bracket from the wall.
step 4 If the inverter will be reinstalled in the future, please refer to “3.2
Inverter Storage” for a proper conservation.
– – End
8.3 Disposal of the Inverter
Users take the responsibility for the disposal of the inverter.
Some parts and devices of the inverter, such as the capacitors, may cause environmental pollution. Do not dispose of the product together with household waste but in accordance with the disposal regulations for electronic waste applicable at the installation site.
79
9 Troubleshooting and Maintenance
9.1 Troubleshooting
Once the inverter fails, the fault information can be displayed on the App
interface. If the inverter is equipped with an LCD screen, the fault
information can be viewed on it. The fault codes and troubleshooting methods
of all PV inverters are detailed in the table below. The device you purchase
may only contain some of the fault information, and when the inverter fails,
you can check the corresponding information through the fault codes from the
mobile app.
80
User Manual
Fault code Fault name
2, 3, 14, 15 Grid Overvoltage
4, 5
Grid Undervoltage
9 Troubleshooting and Maintenance
Corrective measures Generally, the inverter will be reconnected to the grid
after the grid returns to normal. If the fault occurs repeatedly: 1. Measure
the actual grid voltage, and contact the local electric power company for
solutions if the grid voltage is higher than the set value. 2. Check whether
the protection parameters are appropriately set via the App or the LCD. Modify
the overvoltage protection values with the consent of the local electric power
operator. 3. Contact Sungrow Customer Service if the preceding causes are
ruled out and the fault persists. Generally, the inverter will be reconnected
to the grid after the grid returns to normal. If the fault occurs repeatedly:
- Measure the actual grid voltage, and contact the local electric power company for solutions if the grid voltage is lower than the set value. 2. Check whether the protection parameters are appropriately set via the App or the LCD. 3. Check whether the AC cable is firmly in place. 4. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
81
9 Troubleshooting and Maintenance
User Manual
Fault code 8
Fault name Grid Overfrequency
9
Grid Underfrequency
10
Grid Power Outage
Excess Leakage
12
Current
Corrective measures Generally, the inverter will be reconnected to the grid
after the grid returns to normal. If the fault occurs repeatedly:
1. Measure the actual grid frequency, and contact the local electric power
company for solutions if the grid frequency is beyond the set range.
2. Check whether the protection parameters are appropriately set via the App
or the LCD.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and
the fault persists. Generally, the inverter will be reconnected to the grid
after the grid returns to normal. If the fault occurs repeatedly:
1. Check whether the grid supplies power reliably.
2. Check whether the AC cable is firmly in place.
3. Check whether the AC cable is connected to the correct terminal (whether
the live wire and the N wire are correctly in place).
4. Check whether the AC circuit breaker is connected.
5. Contact Sungrow Customer Service if the preceding causes are ruled out and
the fault persists. 1. The fault can be caused by poor sunlight or damp
environment, and generally the inverter will be reconnected to the grid after
the environment is improved.
2. If the environment is normal, check whether the AC and DC cables are well
insulated.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and
the fault persists.
82
User Manual
9 Troubleshooting and Maintenance
Fault code 13
17
28, 29, 208, 448-479
Fault name
Corrective measures Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:
1. Measure the actual grid frequency, and
Grid Abnormal
contact the local electric power company for solutions if the grid parameter exceeds
the set range.
2. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
Generally, the inverter will be reconnected to the grid after the grid returns to normal. If the fault occurs repeatedly:
1. Measure the actual grid voltage. If grid phase voltages differ greatly, contact the electric power company for solutions.
Grid Voltage Imbalance 2. If the voltage difference between phases is within the permissible range of the local
power company, modify the grid voltage imbalance parameter through the App or the LCD.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
1. Check whether the corresponding string
is of reverse polarity. If so, disconnect the DC switch and adjust the polarity when the string current drops below 0.5 A.
PV Reserve Connection Fault
2. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
*The code 28 to code 29 are corresponding
to PV1 to PV2 respectively.
*The code 448 to code 479 are corresponding to string 1 to string 32 respectively.
83
9 Troubleshooting and Maintenance
User Manual
Fault code 532-547, 564-579
548-563, 580-595
Fault name
Corrective measures 1. Check whether the corresponding PV input side is of reverse polarity. If so, adjust the polarity.
PV Reverse Connection Alarm
Contact Sungrow Customer Service if the preceding causes are ruled out and the
fault persists.
*The code 532 to code 547 are corresponding to string 1 to string 16 respectively.
*The code 564 to code 579 are corresponding to string 17 to string 32 respectively.
Check whether the voltage and current of the inverter is abnormal to determine the cause of the alarm.
1. Check whether the corresponding module is sheltered. If so, remove the shelter and ensure module cleanness.
2. Check whether the battery board wiring is loose, if so, make it reliably connected.
PV Abnormal Alarm
3. Check if the DC fuse is damaged. If so, replace the fuse.
4. Contact Sungrow Customer Service if the preceding causes are ruled out and the fault persists.
*The code 548 to code 563 are corresponding to string 1 to string 16 respectively.
*The code 580 to code 595 are corresponding to string 17 to string 32 respectively.
84
User Manual
9 Troubleshooting and Maintenance
Fault code 37 43 39
Fault name
Excessively High Ambient Temperature
Excessively Low Ambient Temperature
Low System Insulation Resistance
Corrective measures Generally, the inverter will resume operation when the
internal or module temperature returns to normal. If the fault persists:
1. Check whether the ambient temperature of the inverter is too high;
2. Check whether the inverter is in a wellventilated place;
3. Check whether the inverter is exposed to direct sunlight. Shield it if so;
4. Check whether the fan is running properly. Replace the fan if not;
5. Contact Sungrow Power Customer Service if the fault is due to other causes
and the fault persists. Stop and disconnect the inverter. Restart the inverter
when the ambient temperature rises within the operation temperature range.
Wait for the inverter to return to normal. If the fault occurs repeatedly:
1. Check whether the ISO resistance protection value is excessively high via
the app or the LCD, and ensure that it complies with the local regulations.
2. Check the resistance to ground of the string and DC cable. Take corrective
measures in case of short circuit or damaged insulation layer.
3. If the cable is normal and the fault occurs on rainy days, check it again
when the weather turns fine.
4. Contact Sungrow Customer Service if the preceding causes are ruled out and
the fault persists.
85
9 Troubleshooting and Maintenance
User Manual
Fault code 106
88 84 514
Fault name Grounding Cable Fault
Electric Arc Fault
Reverse Connection Alarm of the Meter/CT
Meter Communication Abnormal Alarm
Corrective measures 1. Check whether the AC cable is correctly connected.
2. Check whether the insulation between the ground cable and the live wire is
normal.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and
the fault persists. 1. Disconnect the DC power supply, and check whether any
DC cable is damaged, the connection terminal or fuse is loose or there is a
weak contact. If so, replace the damaged cable, fasten the terminal or fuse,
and replace the burnt component.
2. After performing step 1, reconnect the DC power supply, and clear the
electric arc fault via the App or the LCD, after that the inverter will return
to normal.
3. Contact Sungrow Customer Service if the fault persists. 1. Check if the
meter is wrongly connected.
2. Check if the input and output wiring of the meter is reversed.
3. If the existing system is enabled, please check if the rated power setting
of the existing inverter is correct. 1. Check whether the communication cable
and the terminals are abnormal. If so, correct them to ensure reliable
connection.
2. Reconnect the communication cable of the meter.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and
the fault persists.
86
User Manual
9 Troubleshooting and Maintenance
Fault code Fault name
323
Grid Confrontation
Inverter Parallel Com75
munication Alarm
7, 11, 16, 1925, 3034, 36, 38, 4042, 4450, 5258, 6068, 85, 87, 92, 93, 100105, 107114, 116124, 200211, 248255, 300322, 324326, 401412, 600603, 605, 608, 612, 616, 620, 622 624, 800, 802, 804, 807, 1096 1122
System Fault
Corrective measures 1. Check whether the output port is connected to actual
grid. Disconnect it from the grid if so. 2. Contact Sungrow Customer Service
if the preceding causes are ruled out and the fault persists. 1. Check whether
the communication cable and the terminals are abnormal. If so, correct them to
ensure reliable connection. 2. Reconnect the communication cable of the meter.
3. Contact Sungrow Customer Service if the preceding causes are ruled out and
the fault persists.
Wait for the inverter to return to normal. Disconnect the AC and DC switches,
and reconnect the AC and DC switches 15 minutes later to restart the inverter.
If the fault still exists, contact Sungrow Customer Service.
87
9 Troubleshooting and Maintenance
User Manual
Fault code 59, 7072, 74, 76, 82, 83, 89, 77 81, 216 218, 220 231, 432 434, 500 513, 515 518, 900, 901, 910, 911
Fault name System Alarm
264-283
MPPT Reverse Connection
332-363
Boost Capacitor Overvoltage Alarm
Corrective measures
1. The inverter can continue running. 2. Check whether the related wiring and
terminal are abnormal, check whether there are any foreign materials or other
environmental abnormalities, and take corresponding corrective measures when
necessary. If the fault persists, please contact Sungrow Power Customer
Service.
1. Check whether the corresponding string is of reverse polarity. If so,
disconnect the DC switch and adjust the polarity when the string current drops
below 0.5 A. 2. Contact Sungrow Customer Service if the preceding causes are
ruled out and the fault persists. *The code 264 to code 279 are corresponding
to string 1 to string 20 respectively. 1. The inverter can continue running.
2. Check whether the related wiring and terminals are abnormal, check whether
there are any foreign materials or other environmental abnormalities, and take
corresponding corrective measures when necessary. If the fault persists,
please contact Sungrow Power Customer Service.
88
User Manual
9 Troubleshooting and Maintenance
Fault code 364-395
1548-1579
Fault name Boost Capacitor Overvoltage Fault
String Current Reflux
Corrective measures Disconnect the AC and DC switches, and reconnect the AC
and DC switches 15 minutes later to restart the inverter. If the fault still
exists, contact Sungrow Customer Service. 1. Check whether the number of PV
modules of the corresponding string is less than other strings. If so,
disconnect the DC switch and adjust the PV module configuration when the
string current drops below 0.5 A.
2. Check whether the PV module is shaded;
3. Disconnect the DC switch to check whether the open circuit voltage is
normal when the string current drops below 0.5 A. If so, check the wiring and
configuration of the PV module,
4. Check whether the orientation of the PV module is abnormal.
9.2 Maintenance
9.2.1 Maintenance Notices
Risk of inverter damage or personal injury due to incorrect service!
· Always keep in mind that the inverter is powered by dual sources: PV strings
and utility grid.
Before any service work, observe the following procedure.
· Disconnect the AC circuit breaker and then set the DC load-break switch of
the inverter to OFF;
· Turn the DC switch from ON to OFF and continue to turn it 20 degrees
counterclockwise, the DC switch can be locked here.For countries “AU” and “NZ”
· Wait at least 5 minutes for inner capacitors to discharge completely;
· Verify that there is no voltage or current before pulling any connector.
89
9 Troubleshooting and Maintenance
User Manual
Keep non-related persons away! A temporary warning sign or barrier must be posted to keep non-related persons away while performing electrical connection and service work.
Restart the inverter only after removing the fault that impairs safety performance. As the inverter contains no component parts that can be maintained, never arbitrarily replace any internal components. For any maintenance need, please contact SUNGROW. Otherwise, SUNGROW shall not be held liable for any damage caused.
Servicing of the device in accordance with the manual should never be undertaken in the absence of proper tools, test equipments or the latest revision of the manual which has been clearly and thoroughly understood.
9.2.2 Routine Maintenance
Item System clean
Method Check the temperature and dust of the inverter. Clean the inverter
enclosure if necessary.
Check if the air inlet and outlet are normal. Clean the air inlet and outlet,
if necessary.
Period
Six months to a year (depend on the dust contents in air.)
Check whether there is fan warning using App.
Fans
Check whether there is any abnormal noise when the fan is turning.
Once a year
Clean or replace the fans if necessary (see the following section).
90
User Manual
9 Troubleshooting and Maintenance
Item Cable entry
Electrical Connection
Method Check whether the cable entry is insufficiently sealed or the gap is
excessively large, and reseal the entry when necessary.
Check whether all cable are firmly connected in place.
Check whether a cable is damaged, especially the part contacting the metal
enclosure.
Period Once a year
Six months to a year
9.2.3 Cleaning Air Inlet and Outlet
A significant amount of heat is generated when the inverter is working. In
order to maintain good ventilation, please check to make sure the air inlet
and outlet are not blocked. Clean the air inlet and outlet with soft brush or
vacuum cleaner if necessary.
9.2.4 Fan Maintenance
· Stop the inverter and disconnect it from all power supplies before
maintenance.
· Lethal voltage still exists in the inverter. Please wait for at least 5
minutes and then perform maintenance work.
· Only qualified electricians can maintain the fans.
Fans inside the inverter are used to cool the inverter during operation. If
the fans do not operate normally, the inverter may not be cooled down and
inverter efficiency may decrease. Therefore, it is necessary to clean dirty
fans and replace the broken fans in a timely manner. The operation procedure
is as follows: step 1 Stop the inverter (see 8.1 Disconnecting the Inverter).
step 2 Loosen the screw on the sealing plate of the fan module.
91
9 Troubleshooting and Maintenance
User Manual
step 3 Press the tab of the latch hook, unplug the cable connection joint
outwards, and loosen the screw on the fan holder.
step 4 Pull out the fan module, clean the fans with soft brush or vacuum
cleaner, and replace them when necessary.
92
User Manual
9 Troubleshooting and Maintenance
step 5 Reinstall the fan back to the inverter in reverse order and restart the
inverter. – – End
93
10 Appendix
10.1 Technical Data
Parameters Input (DC) Max. PV input voltage Min.PV input voltage/Start-up
input voltage Nominal input voltage MPP voltage range No. of independent MPP
inputs No. of PV strings per MPPT Max. PV input current Max.DC Short-circuit
current Output (AC) AC output power Max. AC output current Nominal AC voltage
AC voltage range Nominal grid frequency / Grid frequency range Harmonic (THD)
Power factor at nominal power / Adjustable power factor Feed-in phases / AC
connection Efficiency Max. efficiency / European efficiency Protection and
Function DC reverse polarity protection AC short-circuit protection Leakage
current protection Grid monitoring Ground fault monitoring
94
SG110CX
1100 V 200 V / 250 V
585 V 200 1000 V
9 2 26 A 9 40 A * 9
110 kVA @ 45 / 100 kVA @ 50 158.8 A
3 / N / PE230 / 400 V 320 460 V
50 Hz / 45 ~ 55Hz60Hz / 55 ~ 65 Hz < 3 % (at nominal power)
0.99 / 0.8 leading 0.8 lagging
3 / 3 PE
98.7% / 98.5%
Yes Yes Yes Yes Yes
User Manual
10 Appendix
Parameters DC switch AC switch PV string monitoring Q at night PID recovery
function Arc fault circuit interrupter (AFCI) Surge protection General Data
Dimensions (WHD) Weight Topology Ingress protection rating Night power
consumption Operating ambient temperature range Allowable relative humidity
range Cooling method Max. operating altitude Display Communication DC
connection type AC connection type
Grid Support
SG110CX Yes No Yes Yes Yes
Optional
DC Type II (optional: Type I + II) / A C Type II
1051 660 362.5 mm 89 kg
Transformerless IP66 <2W
-30 to 60 (> 50 derating)
0 – 100%
Smart forced air cooling 4000 m (> 3000 m derating)
LED, Bluetooth + APP RS485/ Optional: WLAN, Ethernet
MC4 (Max. 10 mm2 optional) OT or DT terminal (Max.240 mm2) Q at night
function, LVRT, HVRT, active & reactive power control and power ramp rate
control
- If the maximum DC voltage in the system can exceed 1000 V, the MC4 connectors included in the scope of delivery must not be used. In this case MC4 Evo2 connectors must be used.
10.2 Wring Distance of DI Dry Contact
The maximum wiring distance of DC dry contact must meet the requirements in the Table below. The wiring distance L is the total length of all DI signal cables.
95
10 Appendix
User Manual
LK refers to the cable length in one direction between the DI dry contact terminal of the kth inverter and the corresponding terminal of the (k-1)th inverter.
table 10-1 Correspondence between number of inverters and maximum wiring distance
Number of inverter
Maximum wiring distance(unit:m)
16AWG / 1.31mm2
17AWG / 1.026mm2
1
13030
10552
2
6515
5276
3
4343
3517
4
3258
2638
5
2606
2110
6
2172
1759
7
1861
1507
8
1629
1319
9
1448
1172
10
1303
1055
11
1185
959
12
1086
879
13
1002
812
14
931
754
15
869
703
16
814
660
17
766
621
18
724
586
19
686
555
20
652
528
21
620
502
22
592
480
23
567
459
24
543
440
25
521
422
96
User Manual
10 Appendix
In case the specification of the cable used is not included in the Table
above, when there is only one inverter, ensure that the line impedance of the
input node is less than 300; and when there are multiple inverters connected
in the daisy chain, ensure that the impedance is less than 300/number of
inverter.
10.3 Quality Assurance
When product faults occur during the warranty period, SUNGROW will provide
free service or replace the product with a new one. Evidence During the
warranty period, the customer shall provide the product purchase invoice and
date. In addition, the trademark on the product shall be undamaged and
legible. Otherwise, SUNGROW has the right to refuse to honor the quality
guarantee. Conditions · After replacement, unqualified products shall be
processed by SUNGROW. · The customer shall give SUNGROW a reasonable period to
repair the faulty device. Exclusion of Liability In the following
circumstances, SUNGROW has the right to refuse to honor the quality guarantee:
· The free warranty period for the whole machine/components has expired. · The
device is damaged during transport. · The device is incorrectly installed,
refitted, or used. · The device operates in harsh conditions beyond those
described in this manual. · The fault or damage is caused by installation,
repairs, modification, or disassembly
performed by a service provider or personnel not from SUNGROW. · The fault or
damage is caused by the use of non-standard or non-SUNGROW com-
ponents or software. · The installation and use range are beyond stipulations
of relevant international
standards. · The damage is caused by unexpected natural factors. For faulty
products in any of above cases, if the customer requests maintenance, paid
maintenance service may be provided based on the judgment of SUNGROW.
10.4 Contact Information
Should you have any question about this product, please contact us.
97
10 Appendix
User Manual
We need the following information to provide you the best assistance:
· Model of the device
· Serial number of the device · Fault code/name
· Brief description of the problem
China (HQ) Sungrow Power Supply Co., Ltd Hefei +86 551 65327834
service@sungrowpower.com Brazil Sungrow Do Brasil Sao Paulo +55 0800 677 6000
latam.service@sungrowamericas.com Germany, Austria, Switzerland Sungrow
Deutschland GmbH Munich +49 0800 4327 9289 service@sungrow-emea.com India
Sungrow (India) Private Limited Gurgaon +91 080 41201350
service@in.sungrowpower.com
Japan Sungrow Japan K.K. Tokyo + 81 3 6262 9917 service@jp.sungrowpower.com
Malaysia Sungrow SEA Selangor Darul Ehsan +60 19 897 3360
service@my.sungrowpower.com
Australia Sungrow Australia Group Pty. Ltd. Sydney +61 2 9922 1522
service@sungrowpower.com.au France Sungrow France Lyon +33420102107 service
@sungrow-emea.com Greece Service Partner Survey Digital +30 2391052757
service@sungrow-emea.com
Italy Sungrow Italy Verona +39 0800 974739 (Residential) +39 045 4752117
(Others) service@sungrow-emea.com Korea Sungrow Power Korea Limited Seoul +82
70 7719 1889 service@kr.sungrowpower.com Philippines Sungrow Power Supply Co.,
Ltd Mandaluyong City +63 9173022769 service@ph.sungrowpower.com
98
User Manual
Thailand Sungrow Thailand Co., Ltd. Bangkok +66 891246053
service@th.sungrowpower.com Romania Service Partner – Elerex service@sungrow-
emea.com
UK Sungrow Power UK Ltd. Milton Keynes +44 (0) 01908 414127 service@sungrow-
emea.com Vietnam Sungrow Vietnam Hanoi +84 918 402 140
service@vn.sungrowpower.com Poland +48 221530484 service@sungrow-emea.com
10 Appendix
Spain Sungrow Ibérica S.A.U. Mutilva +34 948 05 22 04 service@sungrow-emea.com
Turkey Sungrow Deutschland GmbH Turkey Istanbul +90 216 663 61 80 service
@sungrow-emea.com U.S.A, Mexico Sungrow USA Corporation Phoenix +1 833 747
6937 techsupport@sungrow-na.com Belgium, Netherlands and Luxembourg (Benelus)
+31 08000227012 (only for Netherlands) service@sungrow-emea.com
–
99
References
- emea.com
- Commercial Distributor & Supply Company | North American
- Leading Solar Inverter and Energy Storage Solutions Provider - Sungrow US
- Leading Solar Inverter and Energy Storage Solutions Provider - Sungrow US
- Home - Identity Digital
- Leading Solar Inverter and Energy Storage Solutions Provider - Sungrow US
Read User Manual Online (PDF format)
Read User Manual Online (PDF format) >>