Sunnytek SUN-1K-G User manual

PV Grid Tie Inverter
SUN-1K-G SUN-2K-G
SUN-3K-G
User manual

Contents Contents
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
7.1 Limiter function wiring diagram
7.2 Use of limiter function
7.3 Notes while using limiter 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
8.5.1 System Param
8.5.1.1 Time set
8.5.1.2 Language set
8.5.2 Running Param
8.5.3 Protect Param
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Contents
9. Repair and Maintenance
10. Error information and processing
10.1 Error code
10.2 Troubleshooting
11. Specification

1. Introduction
Application of inverter in photovoltaic power system
1.1 Appearance Introduction
1.2 Parts list
Single 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-1K-G、SUN-2K-G and SUN-3K-G .The following is collectively referred to as
‘inverter’.
Pic1.1 Front view Pic1.2 Bottom view
Pic1.3 Accessories drawing
Table1.1 Parts list
Description
Inverter
Wall mounting bracket
Mounting stainless steel screws M4×12
AC power connectors
DC power connectors（including Inserted spring）
Stainless steel anti-collision bolt M6×80
Square hole sealing plate（For WIFI function ）
Sensor Clamp(optional)
Instruction book
Wi-Fi-Plug（For WIFI function ）
No
1
2
3
4
5
6
7
8
9
10
1
1
4
1
1pairs
2
1
1
1
1
Qty
Please check the following table, to see whether all the parts are included in the package：
1
67
2345
8910
Serial number Description
A
B
C
D
E
Inverter
Metering device
PV strings
Power grid
Family load
ABCD
E
ACDC AlarmNormal
ACDC AlarmNormal
ACDC AlarmNormal
limiter
DC SWITCH
ON
OFF RS485
RS232485
- 01 - - 02 -
Photovoltaic Grid-connected System

2. Safety warnings and instructions
2.1 Safety signs
Improper use of the inverter will cause electric shock and burn.During the installation and
maintenance.Please operate the inverter in strict accordance with the user 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 signs:
2.2 Safety instructions
Safety warning——Indifference of the signs in the manual may cause
injury or even death.
Shock warning sign——Incorrect follow of this sign may get shocked.
Prudent operation——Incorrect follow of the safety operation hints in
this manual may cause inverter defect.
Local temperature of inverter may exceed 80℃ while under operating.
Please do not touch the inverter surface.
Electrical installation of the inverter must conform to the safety operation
rules of the country or local area.
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Local temperature of inverter may exceed 80℃ while under operating.
Please do not touch the inverter case.
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Inverter adopts non-isolated topology structure, hence must insure DC
input and AC output are electrical isolated before operating the inverter.
Strictly prohibit grounding the positive and negative poles of the PV string.
Otherwise it will damage the inverter.
=GXTOTM
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Prohibit disassembling inverter case, there existing shock hazard,which may
cause serious injury or death, please ask qualified person to repair.
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When PV module is exposed to sunlight, the output will generate DC
voltage. Prohibit touching to avoid shock hazard.
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While disconnect the input and output of the inverter for maintenance,
please waits for at least 5 mins until the inverter discharge the remnant
electricity.
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9GLKZ_.OTZ
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- 03 - - 04 -

2.3 Notes for using
3.2 Status Indicator
3. Operation Interface
1. Inverter should be installed and maintained by qualified person under local standard
regulations.
2. Must disconnect the AC side first, then disconnect DC side while doing installation
and maintenance, after that, please wait at least 5 mins to avoid getting shocked.
3. Local temperature of the inverter may exceed 80 ℃ while under operating.Do not
touch to avoid getting injured.
4. All electrical installation must be in 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.
Pic 3.1 Panel
6. Please install where children can not touch.
8. Don’t insert or 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 value of the
model.
The inverter panel has 4 indicators, the left one is DC output indicator, green indicates
normal DC input. Beside is the AC indicator, green in dicates normal AC connecting.
Next is the operating indicator,green indicates normal output.The right indicator is
alarm indicator, red indicates alarming.
7. When starting the inverters, first close the circuit breaker at the grid side, then
close the DC side; when closing the inverters, first disconnect the circuit
breaker at the AC side, then disconnect the DC side.
The single phase string power inverter is designed and tested under related safety
regulations. It can ensure the personal safety of the user. But as a electric device,it may
cause shock or injury by incorrect operation. Please operate the unit under below
requirements:
3.1 Interface View
- 05 - - 06 -
ACDC AlarmNormal

3.3 Buttons
4.1 Select installation location
4. Product installation
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）
Pic4.1 Recommended installation place
When you receive the inverter and prepare to install it, please select a suitable location,
which 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 overh eating 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.
3.4 LCD Display
SUN-1K/2K/3K-G single-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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● Please select the wall with certain bearing vcapacity.
● When doing the installation, vertical slope cannot exceed +/-15°,make sure nolateral
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 picture 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 installed in the airtight house.
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Do not place or store any items next to the inverter. Pic4.3 Installation Gap
Inverter should be installed vertically installed, as shown in picture 4.4，installation.
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
Pic4.2 Installation Angle
≥500mm
≥500mm
≤15°
Anchoring
Mounting bracket
M4*14 Stainless steel screws
Inverter
- 09 - - 10 -

Procedure shows below:
Locate on the appropriate wall according to the bolt position on the mounting bracket,
then mark the hole.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 is in accordance
with themountingplate, and the mounting rack is horizontally placed.
3. Hang the inverter to the top of the mounting rack and then use the M4 screw in the
accessory to lock inverter heat sink to the hanging plate, to ensure that the inverter
will not move.
Pic4.5 Inverter hanging plate installation
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1. Switch AC off
2. Switch DC off
3. Connect the inverter to the grid
Pic5.1 DC+connector (MC4)
7mm
The steps of assembling the DC connector are listed as follows：
a)Strip off the DC wire about 7mm, disassemble the connector cap nut
(see picture 5.3)
c) 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 picture 5.5).
d) Finally insert the DC connector into the positive and negative input of the
inverter，shown as picture 5.6
b) Crimping metal terminals with crimping pliers as shown in picture 5.4.
Pic5.2 DC-connector (MC4
Pic5.5 connector with cap nut screwed on
Table 5.1 DC Cable Specifications
Pic5.6 DC input connection
Pic5.3 Disassemble the connector cap nut
Pic5.4 Crimp the contact pin to the wire
5.1 DC input terminal connection
5 Electrical 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）
7mm
- 13 - - 14 -

Sunlight shines on the panel 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 the DC switch
should be '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 single-phase AC terminals
that can be conveniently connected.Flexible cords are recommended for easy installation.
The specifications are as shown in Table 5.2.
1. Matching socket 2.Sleeve 3.Sealing core 4.Sealing nut
Pic5.7 AC connector structure
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: Separate the sleeve from the matching socket,as shown in picture 5.7, the
connector body has two locking holes, and press the locking valve in the hole
inward to separate the matching socket from the sleeve.
Step 3: Use strippers to strip the protective sheath and insulation layer of the AC
cable to the right length, as shown in Picture 5.8.
=GXTOTM͹
45:+͹
Prohibit using a single circuit breaker for multiple inverters,prohibit the
connection of load between inverter circuit breakers.
Table 5.2 Cable information Pic5.8 Strip AC cable
5.2 AC input terminal connection
Outside cable(2+PE)20m
Specification
Model SUN-1K-G
10A/400V
SUN-2K-G
16A/400V
SUN-3K-G
20A/400V
Cable
CSA
Cable
outer dia AWG
122.5mm 15-18mm
Cable
CSA
Cable
outer dia AWG
1215-18mm
Cable
CSA
Cable
outer dia AWG
1215-18mm
22.5mm22.5mm2
Breaker
Max cable
length
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Be careful to distinguish the L, N and PE of the AC cables.
1
2
34
8~15mm
40mm
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