Sungrow SH5K-20 User manual

SH5K-20-UEN-Ver13-201807 Version：1.3
User Manual
SH5K-20
Grid-Connected Hybrid
Inverter

I
About This Manual
Applicability
This manual is applicable to the inverter type SH5K-20.
Target Group
This manual is intended for:
qualified personnel who are responsible for the installation and
commissioning of the inverter; and
inverter owners who will have the ability to interact with the inverter via the
LCD display.
How to Use The Manual
Read the manual and other related documents before any work on the inverter
is carried out. Documents must be stored carefully and be available at all times.
All rights to the content of this manual are owned by Sungrow Power Supply
Co., Ltd. (hereinafter “SUNGROW”). No part of this document can be modified,
distributed, reproduced or published in any form or by any means without prior
written permission from SUNGROW.
Content may be periodically updated or revised due to product development.
The information in this manual is subject to change without notice. The latest
manual can be acquired at www.sungrowpower.com.
Symbols
Safety instructions will be highlighted with the following symbols.
Symbol
Explanation
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.
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.

II
Symbol
Explanation
Indicates additional information, emphasized contents or
tips that may be helpful, e.g. to help you solve problems or
save time.

III
Contents
About This Manual ...................................................................I
1Safety..................................................................................1
2System Solution ................................................................5
2.1 On-grid System .........................................................................8
2.2 Off-grid System .......................................................................10
2.3 Retrofitting the Existing PV System......................................... 11
3Function Description.......................................................12
3.1 Safety Function .......................................................................12
3.1.1 Protection ..................................................................................12
3.1.2 Earth Fault Alarm.......................................................................12
3.2 Energy Conversion and Management.....................................12
3.2.1 Power Derating..........................................................................13
3.2.2 External Demand Response.....................................................14
3.2.3 Reactive Power Regulation.......................................................15
3.2.4 Active Power Response............................................................15
3.2.5 Load Control..............................................................................16
3.3 Battery Management............................................................... 16
3.3.1 Charge Management.................................................................17
3.3.2 Discharge Management............................................................19
3.3.3 Maintenance Management........................................................19
3.3.4 Battery Temperature Sensor (PT1000).....................................19
3.4 Communication and Configuration..........................................20
4Unpacking and Storing...................................................21
4.1 Unpacking and Inspecting.......................................................21
4.2 Delivery Contents....................................................................22
4.3 Storing the Inverter..................................................................23
5Mechanical Mounting......................................................24
5.1 Location Requirements ...........................................................24

IV
5.2 Installing the Inverter................................................................26
5.3 Installing the Energy Meter ......................................................27
6Electrical Connection...................................................... 28
6.1 Terminal Description ................................................................28
6.2 Grounding the Inverter.............................................................30
6.3 Meter Connection.....................................................................30
6.4 Grid Connection.......................................................................32
6.4.2 Assembling the AC Connector ..................................................33
6.4.3 Installing the AC Connector.......................................................34
6.5 PV Connection.........................................................................34
6.5.1 PV Input Configuration..............................................................35
6.5.2 Connecting the Inverter to the PV Strings.................................36
6.6 Communication Connection.....................................................38
6.6.1 Ethernet Connection..................................................................39
6.6.2 Wi-Fi Connection.......................................................................41
6.7 Battery Connection ..................................................................41
6.7.1 Connecting the Power Cable ....................................................41
6.7.2 Connecting the CAN Cable.......................................................43
6.7.3 Connecting the Temperature Sensor ........................................44
6.8 STB5K-20 Connection (EPS)...................................................45
6.8.1 Connecting the Power Cables...................................................45
6.8.2 Connecting the Control Cable and DI Cable.............................46
6.9 DO Connection ........................................................................47
7Commissioning ............................................................... 50
7.1 Inspection before Commissioning............................................50
7.2 Button Introduction...................................................................50
7.3 Powering on the System..........................................................51
7.4 LCD Initial Settings ..................................................................52
7.5 Result Verification....................................................................56
8Troubleshooting and Maintenance................................ 57
8.1 Troubleshooting .......................................................................57
8.1.1 Troubleshooting of LED Indicators............................................57

V
8.1.2 Troubleshooting of the Errors....................................................57
8.2 Maintenance............................................................................58
8.2.1 Routine Maintenance ................................................................58
8.2.2 Replacing the Button Battery ....................................................58
9System Decommissioning..............................................59
9.1 Decommissioning the Inverter.................................................59
9.2 Decommissioning the Battery..................................................60
10 Appendix I: LCD Operation.............................................61
10.1 Main Screen............................................................................61
10.2 LCD Menu...............................................................................62
10.3 Starting and Stopping the Inverter...........................................64
10.4 Advanced Settings ..................................................................64
10.4.1 Inputting Password..................................................................64
10.4.2 Setting the EPS Function........................................................65
10.4.3 Adding the Existing System.....................................................65
10.4.4 Setting the Battery Type..........................................................66
10.4.5 Setting the Battery Usage Time ..............................................66
10.4.6 Setting Forced Charge............................................................67
10.4.7 Setting the Protective Parameters..........................................67
10.4.8 Setting Reactive Power Regulation.........................................68
10.4.9 Setting Active Power Response..............................................68
10.4.10 Setting Load Control..............................................................69
10.4.11 Setting the Communication Parameters...............................71
10.4.12 Testing Earth Fault ................................................................71
10.4.13 DRM Switch Setting ..............................................................71
10.4.14 PT1000 Switch Setting..........................................................71
10.4.15 Factory Reset........................................................................72
10.5 Setting the Time ......................................................................72
10.6 Setting the Country..................................................................72
10.7 Viewing the Error Codes .........................................................74
11 Appendix II: Visiting and Configuring the Webserver..75
11.1 User and Authority...................................................................75

VI
11.2 Main Interface..........................................................................76
11.3 Navigation Introduction ............................................................76
12 Appendix III: AS/NZS 4777 Compliant ........................... 78
12.1 Demand Response Modes ......................................................78
12.1.1 Connecting the inverter to a DRED.........................................78
12.1.2 Viewing the DRM State via LCD Menu...................................79
12.2 Reactive Power Regulation......................................................80
12.2.1 “Qt” Mode ................................................................................80
12.2.2 “Q(p)” Mode.............................................................................80
12.2.3 “Q(u)” Mode.............................................................................81
12.3 Active Power Response...........................................................82
12.3.1 Volt-watt Response .................................................................82
12.3.2 Volt-watt Response for Battery Charging................................83
12.3.3 Frq-Watt Response .................................................................84
13 Appendix IV: Technical Data........................................... 87
13.1 Inverter.....................................................................................87
13.2 STB5K-20 (backup box)...........................................................89
13.3 Energy Meter ...........................................................................89

1
1 Safety
General Safety
The inverter 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 inverter.
Incorrect operation or work may cause:
injury or death to the operator or a third party; or
damage to the inverter and other properties belonging to the operator or a
third party.
Lethal voltage!
PV strings will produce electrical power when exposed to sunlight
and can cause a lethal voltage and an electric shock.
Only qualified personnel can perform the wiring of the PV panels.
All electrical connection
s must be in accordance with local and
national standards.
Only with the permission of the utility grid,
the inverter can be
connected to the utility grid.
Inverter
A warning label and a nameplate are pasted on the side of the inverter.
Tab. 1-1 Symbols on the Inverter
Symbol
Explanation
Disconnect the inverter from all the external power sources
before service!
Do not touch live parts until 10 minutes after disconnection
from the power sources.

1 Safety User Manual
2
Symbol
Explanation
There is a danger from a hot surface that may exceed
60°C.
Danger to life due to high voltages!
Only qualified personnel
can open and service the
inverter.
Check the user manual before service!
Regulatory compliance mark.
Do not dispose of the inverter together with household
wastes.
The inverter does not have a transformer.
TUV mark of conformity.
CE mark of conformity.
Danger to life from electric shock due to live voltage
Do not open the enclosure when the inverter is working.
When the enclosure lid is removed, live components can be touched
which can result in death or serious injury due to electric shock.
Danger to life from electric shock due to damaged inverter
Only operate the inverter when it is technically faultless and in a safe
state.
Operating a damaged inverter can lead to hazardous situations that can
result in death or serious injuries due to electric shock.

User Manual 1 Safety
3
Risk of inverter damage or personal injury
Do not pull out PV connectors, AC connector or battery connectors while the
inverter is running. De-energize from all power sources and verify that there
is no voltage.
All the warning labels and nameplate on the inverter body:
must be clearly visible; and
must not be removed, covered or pasted.
Risk of burns due to hot components
Do not touch the hot parts (such as heat sink) during operation. Only the
LCD panel and the DC switch can be touched.
Only qualified personnel can change the country setting.
Unauthorized alteration of the country setting may cause a breach of the
type-certificate marking.
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; and
wear a grounding wristband before touching any connections.
Batteries
Batteries deliver electric power, resulting in burns or a fire hazard when
they are short circuited, or wrongly installed.
Lethal voltages are present in the battery terminals and cables in the
inverter. Severe injuries or death may occur if the cables and terminals
in the inverter are touched.

1 Safety User Manual
4
Provide sufficient ventilation for the battery system to prevent flames
and sparks from the explosive hydrogen gas that the batteries release.
Due to the dangers of hydrogen gas and battery electrolyte:
locate batteries in a designated area, complying with the local regulations;
protect the enclosure against destruction;
do not open or deform the battery;
whenever working on the battery, wear suitable personal protective
equipment (PPE) such as rubber gloves, rubber boots and goggles;
rinse
acid splashes thoroughly with clear water for a long time and
consider consulting a doctor.
Improper settings or maintenance can permanently damage the
battery.
Incorrect inverter parameters will lead to the premature aging of
battery.
Skills of Qualified Personnel
Qualified personnel must have the following skills:
training in the installation and commissioning of the electrical system, as well
as the dealing with hazards;
knowledge of the manual and other related documents; and
knowledge of the local regulations and directives.

5
2 System Solution
The inverter must only be operated with PV strings of protection class
II in accordance with IEC 61730, application class A. It is not permitted
for the positive pole or the negative pole of the PV strings to be
grounded.
Any use other than that described in this chapter is not permitted.
SH5K-20 is a single-phase hybrid inverter applicable to both on-grid and off-grid
PV systems. With the Energy Management System (EMS) integrated, it can
control and optimize the energy flow so as to increase the self-consumption of
the system.
Inverter
The following figure shows the inverter appearance, which is for reference only.
The actual product that you receive may differ.
1
234
6 7
9
8
5
10
Type
S/N A**********
SH5K-20
PV Input
AC Input and output
SUNGROW tOW9R SUttLY /O., LT5.
WWW.SUNGROWPOWER.COM MADE IN CHINA
Grid Monitoring: VDE 0126-1-1 VDE-AR-N 4105
Battery
xxxxxxxxx
Password **********
600V
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
xxxxxxxxx
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xxxxxxxxx xxxxxxxxx xxxxxxxxx
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xxxxxxxxx xxxxxx
xxxxxx
Fig. 2-1 Inverter Appearance
No.
Name
Description
1
AC-Grid
AC terminal to the utility grid.
2 Backup Ctrl
Two holes for the control cable and DI cable of
the backup box STB5K-20.
3 PV connection PV1+，PV1-，PV2+ and PV2-.

2 System Solution User Manual
6
No.
Name
Description
4
DC switch (optional)
To disconnect the DC current safely.
5
Wi-Fi terminal
To connect the Wi-Fi module.
6
Battery connection
BAT+ and BAT-.
7
Communication
connection
RS485, Ethernet, CAN, AI, DO and DRM.
8
Second PE terminal
For reliable grounding.
9
LCD display panel
Human-computer interaction interface.
10 Nameplate
Clearly identify the product, including the SN,
password, technical data, certifications, etc.
The following figure shows the dimensions of the inverter.
D (170)
W (457)
H (515)
Fig. 2-2 Dimensions (unit: mm)
The LCD display panel with an indicator and four buttons is on the front of the
inverter.
3
Fig. 2-3 LCD Display Panel

User Manual 2 System Solution
7
No.
Name
Description
1
Screen
To display the information.
2 Indicator
Green and red can be indicated via the indicator, from
which user can know the current status. For detailed
definition, see Tab. 7-5.
3 Buttons
User can operate the LCD menu via the four buttons.
For detailed functions, see Tab. 7-1.
Energy Meter
The SUNGROW Energy Meter is installed next to the main switch to detect the
electrical measured values at the grid-connected point. It communicates with
the inverter via an RS485 connection. The dimensions are shown below.
Front view Side view
18 65
117
35
45.3
Fig. 2-4 single-phase Meter Dimensions (unit: mm)
Back view Side view
72
85
45 27
45
35
Fig. 2-5 Three-phase Meter Dimensions (unit: mm)
The single-phase Energy Meter and the three-phase Energy Meter
are alternative in the delivery. The meter figures in this document
have been created for the single-
phase Energy Meter unless
otherwise specified.
For details about the Energy M
eter, please refer to the Quick
Installation Guide for it.

2 System Solution User Manual
8
2.1 On-grid System
With a battery module for the immediate storage of energy, the conventional PV
system can be upgraded to be an Energy Storage System (ESS).
A B C D
E
Export powerOutput powerPV power
Load power
F
Battery power
Fig. 2-6 PV Energy Storage System (PV ESS)
Tab. 2-1 System Compositions
Ite
m
Description Remark
A PV strings
Monocrystalline silicon, polycrystalline
silicon, and thin-film without grounding.
B
Inverter
SH5K-20.
C
SUNGROW energy
meter (single-
phase for
example)
Measures the export power and
communicate with the inverter via the RS485
port.
D
Utility grid
Grid grounding system types: TT, TN
E
Household load
Devices that consume energy.
F Battery (optional) A Li-ion battery or a lead-acid battery.
For the TT utility grid, the N line voltage to ground must be less than 30
V.
Energy Management during Daytime
The energy management system (EMS) works in self-consumption by default.
The PV power will go to the house first, then the battery. Then if the battery is
fully charged the excess will go to the grid, the export power should be not more
than the limit value in zero-export setting in initial commissioning.
If the PV power is less than the load power, the battery will discharge and
provide the energy shortfall. The inverter will draw power from the mains if the
power from the PV and battery is less than the load power.

User Manual 2 System Solution
9
Day
Loads consumption
PV power generation
No current
With current
Charging Discharging
Energy Management during Night
The battery discharges to provide energy to loads. If the battery is empty or
there is not enough power from the battery system to supply active loads, the
unmet power will be supplied by the grid.
No current
With current
Night
Night (empty battery)
Loads consumption
Discharging
Loads consumption

2 System Solution User Manual
10
If the meter is abnormal or not equipped:
the inverter can run normally;
the battery can be charged, but not allowed to discharge;
the export power setting on the LCD display will be ineffective;
the DO function of optimized mode will be disabled.
2.2 Off-grid System
The utility grid must be a TN system for the off-grid application.
The system is not suitable for supplying life-
sustaining medical
devices. A power outage must not lead to personal injury.
In an energy storage system with multiple hybrid inverters in parallel,
the hybrid inverters cannot work in EPS mode.
With the backup box STB5K-20 connected into the PV ESS, the system is
capable of operating as an off-grid system to ensure an emergency power
supply for emergency appliances in the event of a grid interruption or blackout.
Also user may manually press the button on the STB5K-20 to switch a system
from on-grid to off-grid.
No current
With current
STB5K-20
SH5K-20
Emergency
appliance
SBP4K8
Home
appliance
Fig. 2-7 Inverter Application in an Off-grid System
The grid interruption or blackout may be caused by grid islanding,
under-voltage, over-voltage, under-frequency or over-frequency, of which the
fault codes will be displayed on the LCD screen.

User Manual 2 System Solution
11
Refer to “6.8 STB5K-20 Connection (EPS)” for cable connections and “10.4.2
Setting the EPS Function” for the LCD settings.
2.3 Retrofitting the Existing PV System
The SH5K-20 hybrid inverter is compatible with any single-phase PV
grid-connected inverters. An existing PV system can be retrofitted to be a PV
ESS with the addition of SH5K-20.
The power generation from the existing PV inverter will be firstly provided to the
loads and then charge the battery. With the energy management function of the
SH5K-20, the self-consumption of the new system will be greatly improved.
STB5K-20
SH5K-20
PV inverter
Emergency
appliance
SBP4K8
Home appliance
Fig. 2-8 Retrofitting the Existing PV System
* Just connect the STB5K-20 to provide the backup function for off-grid
application.
The existing PV inverter provides power to
the
PV ESS, as the power flow shown on the
main screen.
Refer to
“10.4.3
Adding the Existing
System
” to set the rated power of the existing
PV inverter.
The output power of the existing
PV inverter should be taken into
consideration for export power setting. For
detailed settings, see
“10.4.2
Setting the
EPS Function
”.
5000
Running
=
~
3000
2900
900
16:37
(W)
+-

12
3 Function Description
3.1 Safety Function
3.1.1 Protection
The protective functions are integrated in the inverter, including short circuit
protection, grounding insulation resistance surveillance, residual current
protection, anti-islanding protection, DC overvoltage / over-current protection,
etc.
3.1.2 Earth Fault Alarm
The inverter has integrated an earth fault dry-contact (DO2 relay) for the local
alarm. The external alarm needs to be powered by the grid.
The additional equipment required is a light indicator and/or a buzzer. The
recommended cross-section of the DO cable is 1 mm2.
If an earth fault occurs,
the DO2 dry-contact will switch on automatically to signal the external alarm;
the buzzer inside the inverter will also beep; and
the Ethernet communication port can be used for the remote alarm.
3.2 Energy Conversion and Management
The inverter converts the DC power from the PV strings or the battery to the AC
power, which conforms to the grid requirements. It also transmits the DC power
from the PV panel to the battery.
With the bidirectional converter integrated inside, the inverter can charge or
discharge the battery.
Two string MPP trackers can be utilized to maximize the power from PV strings
with different orientations, tilts, or module structures.