Deye SUN-12K-G03 User manual

Grid-tied PV String Inverter
User Manual
R

1. Introduction
1.1 Appearance Introduction
1.2 Parts list
2. Safety warnings and instructions
2.1 Safety signs
2.2 Safety instructions
2.3 Notes for using
3. Operation Interface
3.1 Interface View
3.2 Status Indicator
3.3 Buttons
3.4 LCD Display
4. Product installation
4.1 Select installation location
4.2 Inverter Installation
5. Electrical Connection
5.1 DC input terminal connection
5.2 AC input terminal connection
5.3 The connection of the ground line
5.4 Inverter monitoring connection
6. Startup and Shutdown
6.1 Start up the inverter
6.2 Inverter Shutdown
7. Limiter function (Optional)
7.1 Limiter function wiring diagram
7.2 Connect the limiter to inverter
7.3 Debugging Limiter
7.4 Notes while using limit function
8. General Operation
8.1 The initial interface
8.2 Statistics information
8.3 Fault Record
8.4 ON/OFF setting
8.5 Parameter setting
9. Repair and Maintenance
10. Error information and processing
10.1 Error code
11. Specification
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1. Introduction
Photovoltaic Grid-connected System
1.1 Appearance Introduction
1.2 Parts list
Three Phase String Power Inverter can convert solar panel DC power into AC power
which can directly input to the grid. Its appearance is shown below.These models contain
SUN-12K-G03、SUN-15K-G03、SUN-18K-G03.
The following is collectively referred to as‘inverter’.
Pic1.1 Front view Pic1.2 Bottom view
Please check the following table, to see whether all the parts are included in the package：
1 2 3 4 5
Application of inverter in photovoltaic power system
PV strings Inverter Metering device Power grid
Family load
- 01 -
ACDC AlarmNormal
ACDC AlarmNormal
ACDC AlarmNormal

2. Safety warnings and instructions
2.1 Safety signs
Improper use of the inverter will cause electric shock and burn. During installation and
maintenance,please strictly follow the instructions in this manual. Please read the user
manual carefully before using the inverter. And please keep the instructions properly for
afterwards use.
Safety signs are used to emphasize potential safety risk and important safety
information. The manual includes below things:
Pic1.3 Accessories drawing
1.1 Parts list
Description
Grid-tied PV String Inverter
Wall mounting bracket
Mounting stainless steel screws M4×12
AC power connectors
DC power connectors（including Inserted spring）
Stainless steel Collision bolt M6×80
Square hole sealing plate（Wi-Fi Function selection）
User manual
Wifi-Plug（optional）
No
1
2
3
4
5
6
7
8
9
1
1
4
1
2pairs
4
1
1
1
Qty
6 7 8 9
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Warning：
2.2 Safety instructions
Safety warning——Indifference of the signs in the manual may cause
injury or even death.
Shock Hazard：
Shock warning sign——Incorrect follow of this sign may get shocked.
Safety Hint：
Prudent operation——Incorrect follow of the safety operation hints in
this manual may cause inverter defective.
High Temperature Hazard：
Inverter’s local temperature may exceed 80℃ while under operating.
Please do not touch the inverter’s surface.
Warning：
Electrical installation of the inverter must conform to the safety
operation rules of the country or local area.
Warning：
Inverter is non-isolated topology structure, hence must insure DC
input and AC output are electrical isolated before operating the
inverter. Strictly prohibit ground the positive and negative poles of
the PV string. Otherwise it will damage the inverter.
Shock Hazard：
Prohibit disassembling inverter case. There existing shock hazard,
may cause serious injury or death, please ask qualified person to
maintenance.
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2.3 Notes for using
1. Inverter should be installed and maintained by qualified person under local standard
regulations.
2. It must disconnect the AC side first, then disconnect DC side before doing installation
and maintenance, after disconnecting, please wait at least 5 mins to avoid get shocked.
3. Local temperature of the inverter may exceed 80 ℃ while under operating.Do not
touch to avoid get injured.
4. All electrical installation must accord with local electrical standards, and after obtaining
the permission of the local power supply department, the professionals can connect the
inverter to the grid.
5. Please take appropriate anti-static measure.
6. Please install where children can not touch.
The three phase string power inverter is designed and tested under related safety regulations.
It can ensure the personal safety of the user. But as an electric device, it may cause shock or
injury by incorrect operation. Please operate the unit under below requirements:
Shock Hazard：
When PV module is exposed to sunlight, The output will generate
DC voltage.Prohibit touching to avoid shock hazard.
Shock Hazard：
After disconnecting the input and output of the inverter,it takes at
least 5 minutes for the inverter to completely release the residual
energy and wait for at least 5 minutes before it can be overhauled.
High Temperature Hazard：
Inverter’s local temperature may exceed 80℃ while under
operating. Please do not touch the inverter’s surface.
- 04 -

3.2 Status Indicator
3. Operation Interface
3.1Interface View
Pic 3.1 Panel
8. Don’t insert and remove AC and DC terminals when the inverter is in normal
operation.
9. The DC input voltage of the inverter must not exceed the maximum input voltage of
the model.
The inverter panel has 4 indicators, the left one is DC output indicator(green),indicates
normal DC input power status. Beside is the AC indicator(green),indicates normal AC
connecting status. Next is the operating indicator(green) indicates normal output. The
right indicator is alarm(red), indicates alarming.
7. When starting the inverter, first close the closed-circuit grid-side switch and close the
DC input terminal; when closing the inverter, disconnect the grid-side switch first and
then disconnect the DC-side switch.
ACDC AlarmNormal
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3.3 Buttons
There are four buttons on the inverter panel：above is up and increase button (UP),
below is down and decrease button (DOWN）, left is ESC button (ESC）, right is
Enter button (ENTER). The following functions can be achieved by the four
buttons：
● Page turning (use UP and DOWN button）
● Modify adjustable parameters (use ESC and ENTER button）
3.4 LCD Display
The three-phase string inverters use a dot matrix display，mainly contains the
following：
● Inverter operation status and information;
● Operating information;
● Warning message and malfunction display.
Explanation
Inverter detects DC input
Low DC input voltage
Grid Connected
Grid Unavailable
Under normal operating
Stop operating
Detected faults or report faults
Under normal operating
Indicator status
●DC
●AC
● NORMAL
● ALARM
on
off
on
off
on
off
on
off
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4.1 Select installation location
4. Product installation
Pic4.1 Recommended installation place
After receiving the inverter and preparing to install it, please select a suitable location,
should consider below factors:
● Ventilation—Must insure the air ventilation of the installation location, improper
installation may cause overheating and effect the working efficiency and lifespan.
● Sun-shade—Expose the inverter to sunshine will cause it overheating and effect the
working efficiency.
● Avoid rain and snow—Even if the inverter has IP65 protection,we still recommend.
installing the inverter at the ventilate place where can avoid rain and snow. It can help
extend the lifespan of the inverter.
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● Please select the wall with certain bearing capacity.
● When doing the installation, vertical slope cannot exceed +/-15°.Make sure no lateral
tilt. Otherwise it will affect the function of the heat sink. Cause the output power lower
than expected.
● If install more than one inverter, must leave at least 500mm gap between each inverter.
And each inverter must be at least 500mm above and below. And must install the inverter
at the place where children cannot touch. Please see pic 4.3.
● Consider whether the installation environment is helpful to see the inverter LCD
display and indicator status clearly.
● Must offer a ventilate environment if inverter is installed in the airtight house.
Safety Hints：
Do not place or store any items next to the inverter.
Pic4.2 Installation Angle
≤15°
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Pic4.3 Installation Gap
Pic4.4 Inverter Installation
The inverter is designed according to the wall mounted type installation, please use the
wall mounted (the brick wall of the expansion bolt) when installing.
4.2 Inverter Installation
Anchoring
Mounting bracket
M4*14 Stainless steel screws
Inverter
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≥500mm
≥500mm

Inverter should be vertically installed, as shown in pic 4.5，installation procedure show
below:
1. Position the bolts on the appropriate wall according to the bolt positions on the
mounting shelves and mark the holes. On the brick wall, the installation must be suitable
for the expansion bolt installation.
2.Ensure that the position of the installation holes on the wall (A, B, C, D) are the same
position of installation (Picture 4.5), and the mounting level is guaranteed.
3. Hang the inverter to the top of the mounting rack and then use the M4 screw in the
accessory to lock E and F (Picture 4.6) to ensure that the inverter will not move.
Pic4.5 Inverter hanging plate installation
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The inverter has considered the convenience of the electrical connection while designing.
we design fast connection for both DC and AC ,all electrical connections conform to the
related standards of the country .
In order to safe connection, the electrical connection must follow below steps：
1. Switch AC off
2. Switch DC off
3. Connect the inverter to solar panels
Pic4.6 Mounting of inverter
5.1 DC input terminal connection
5 Electrical Connection
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a). Make sure that the polarity of the output voltage of the solar panel is consistent with the
polarity identified by the inverter.
b). Connect DC positive and negative to the inverter input terminal. Figure 5.1 is shown in
figure 5.2.
c).Making DC connection line Strip off the DC wire about 7mm, disassemble the
connector cap nut(see pic5.3).
1). Crimping metal terminals with crimping pliers as shown in 5.4.
Pic 5.3 Disassemble the connector cap nut
Pic 5.4 Crimp the contact pin to the wire
Pic 5.1 DC “+ ”connector (MC4) Pic 5.2 DC“-”connector (MC4)
7mm
7mm
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2). Insert the contact pin into the connector housing until it locks in place. Screw the cap
nut onto the connector housing. Torque to 2.5-3Nm(as shown in pic 5.5).
3).Finally insert the DC connector into the positive and negative input of the inverter，
shown as figure 5.6
Pic 5.5 connector with cap nut screwed on
Sheet 5.1 Specs of AC cable
Pic 5.6 DC input connection
2
Traverse area（mm ）
Cable type Range
4.0(12AWG) 5.5-9.0
Recommended
size
Outside diameter
of cable（mm）
4.0-6.0
(12-10AWG)
Industry generic PV
cable
（model;PV1-F）
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Table 5.2 Cable information
Outside cable(3+PE)20m Outside cable(3+PE)20m
Specification
Model SUN-12K/15K-G03
30A/400V
SUN-18K-G03
40A/400V
DiaCable item Cable
CSA
Cable
outer
dia
15~18mm2.5mm 6mm
AWG Dia Cable
CSA
10mm10 2.5mm
Cable
outer
dia
AWG
15~18mm 8
2 2
Breaker
Max cable
length
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NOTE:
Sunlight shines on the panels will generate voltage, high voltage in series
may cause danger to life. Therefore, before connecting the DC input line,
the solar panel needs to be blocked by the opaque material and ensure that
the DC switch is 'OFF', otherwise, the high voltage of the inverter may lead
to life-threatening conditions.
Do not close the DC switch after the DC terminal is connected. Connect the AC terminal
to the AC side of the inverter, the AC side is equipped with three-phase AC terminals that
can be conveniently connected. Flexible cords are recommended for easy installation. The
specifications are as shown in sheet 5.2
Warning：
Prohibit using a single circuit breaker for multiple inverters , prohibit the
connection of load between inverter circuit breakers.
5.2 DC input terminal connection

The AC output connector is divided into three parts: matching socket, sleeve and sealing
sleeve, as shown in Picture 5.7, the steps are as follows:
Step 1 Remove the cable sealing ring and sleeve in sequence from the AC connector.
Step 2 Use strippers to strip the protective sheath and insulation layer of the AC cable
to the right length, as shown in Picture 5.8.
Pic 5.8 Strip AC cable
1. Matching socket 2.Sleeve 3.Sealing core 4.Sealing nut
Pic 5.7 AC connector structure
1
2
34
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Step 3: Insert the cable (L1, L2, L3, N，PE) into the sealing sleeve.
Step 4 Use the hexagon screwdriver, loosen the bolts of the socket in turn, and
insert each cable core into the corresponding jack, and set each screw. The
connection hole of AC connection terminal labeling is shown in Picture 5.9.
Warning：
Be careful to distinguish the L1, L2,L3,N and PE of the AC cables.
8~15mm
40mm

Step 5 Set the sleeve and sealing ring in place
Step 6 Connect the terminals to the inverter as shown in picture 5.10.
Pic 5.10 AC input connection
Pic 5.9 AC Connector Hole Pattern
Safety Hint：
when connection please according to above picture, ensuring each cable
plug into corresponding port.
- 16 -

Good grounding is good for resisting surge voltage surge and improving EMI performance.
Therefore, before connecting AC, DC, and communication cables, you need to ground
the cable firstly. For a single system, just ground the PE cable; For multiple machine
systems, all PE cables of the inverter need to be connected to the same grounding copper
platoon to ensure the equipotential connection. The installation of the shell ground wire
is shown as Picture 5.11.
Inverter has the function of wireless remote monitoring. The inverter with Wifi function
is equipped with Wifi Plug to connect the inverter and network. Wifi Plug's operation,
installation, Internet access, APP downloading and other processes are detailed in the
instructions. Picture 5.12 is the Internet monitoring solution.
5.3 The connection of the ground line
5.4 Inverter monitoring connection
Warning：
Inverter has built-in leakage current detection circuit, If an external
leakage current protection device is connected,its operating current
must be greater than 300mA or higher, otherwise 1inverter may not
work properly.
Pic 5.11 The installation of the shell ground wire
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When the inverter is out of the factory, the installation location of Wifi plug is sealed by a
sealed plate as shown in Figure 5.13.When installing the Wifi Plug, remove the sealing
plate, replace it with the sealing plate with square hole in the accessories, and tighten the
screws. Insert the Wifi Plug into the interface and fix it with a screw. The configuration of
the WiFi Plug needs to be performed after various electrical connections have been
completed and the inverter DC power on. When the inverter is on the DC power, it is
determined whether the WiFi Plug is normally electrified (The LED light shines out of
the shell).
5.4.1 Installation of Wi-Fi Plug
Pic 5.12 Internet monitoring solution
PC
Router
WIFI
GPRS
Web Server
Phone
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