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Grid-connected PV Inverter

User Manual

DC AC Normal Alarm
About This Manual
The manual mainly describes the product informa�on, guidelines for installa�on, opera�on and
maintenance. The manual cannot include complete informa�on about the photovoltaic (PV) system.

How to Use This Manual

Read the manual and other related documents before performing any opera�on on the inverter.
Documents must be stored carefully and be available at all �mes. Contents may be periodically
updated or revised due to product development. The informa�on in this manual is subject to
change without no�ce.

Photovoltaic Grid-connected System

PV array Inverter Metering Power grid

Family load
Applica�on of inverter in photovoltaic power system

1. Introduc�on
1.1 Appearance Introduc�on
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-1.5K-G, SUN-2K-G, SUN-2.5K-G and SUN-3K-G.
The following is collec�vely referred to as “inverter”.

Pic 1.1 Front view Pic 1.2 Bo�om view

1.2 Parts list
Please check the following table, to see whether all the parts are included in the package

Moun�ng stainless steel

Grid-�ed PV String Inverter Wall moun�ng bracket x1 screws M4×12
x1 x4

DC power connectors Stainless steel an�-collision

AC power connectors x1 (including Inserted spring) bolt M6×80
x1 x2

User
manual

User manual x1 Datalogger (op�onal) x1 Meter(op�onal)

x1

Sensor Clamp(op�onal)
x1
2. Safety warnings and instruc�ons
Improper use may result in poten�al electric shock hazards or burns. This manual contains
important instruc�ons that should be followed during installa�on and maintenance. Please
read these instruc�ons carefully before use and keep them for future reference.

2.1 Safety signs

Safety symbols used in this manual, which highlight poten�al safety risks and important safety
informa�on, are listed as follows:

Warning:
Warning symbol indicates important safety instruc�ons, which if not correctly
followed, could result in serious injury or death.

Shock Hazard:
Cau�on, risk of electric shock symbol indicates important safety instruc�ons,
which if not correctly followed, could result in electric shock.

Safety Hint:
Note symbol indicates important safety instruc�ons, which if not correctly
followed, could result in some damage or the destruc�on of the inverter.

High Temperature Hazard:

Cau�on, hot surface symbol indicates safety instruc�ons, which if not correctly
followed, could result in burns.

2.2 Safety instruc�ons

Warning:
Electrical installa�on of the inverter must conform to the safety opera�on rules
of the country or local area.

Warning:
Inverter adopts non-isolated topology structure, hence must insure DC input and
AC output are electrical isolated before opera�ng the inverter.
Strictly prohibit grounding the posi�ve and nega�ve poles of the PV string.
Otherwise it will damage the inverter.

Shock Hazard:
Prohibit disassembling inverter case, there exis�ng shock hazard, which may
cause serious injury or death, please ask qualified person to repair.
 Shock Hazard:
When PV module is exposed to sunlight, the output will generate DC voltage.
Prohibit touching to avoid shock hazard.

Shock Hazard:
While disconnect the input and output of the inverter for maintenance, please
waits for at least 5 mins un�l the inverter discharge the remnant electricity.

High Temperature Hazard:

Local temperature of inverter may exceed 80 while under opera�ng.
Please do not touch the inverter case.

2.3 Notes for using

The single phase string power inverter is designed and tested under related safety regula�ons.
It can ensure the personal safety of the user. But as a electric device, it may cause shock or
injury by incorrect opera�on. Please operate the unit under below requirements:

1. Inverter should be installed and maintained by qualified person under local standard
regula�ons.
2. Must disconnect the AC side first, then disconnect DC side while doing installa�on and
maintenance, a�er that, please wait at least 5 mins to avoid ge�ng shocked.
3. Local temperature of the inverter may exceed 80 ℃ while under opera�ng.Do not touch
to avoid ge�ng injured.
4. All electrical installa�on must be in accord with local electrical standards, and a�er
obtaining the permission of the local power supply department, the professionals can
connect the inverter to the grid.
5. Please take appropriate an�-sta�c measure.
6. Please install where children can not touch.
7. When star�ng 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.
8. Don’t insert or remove AC and DC terminals when the inverter is in normal opera�on.
9. The DC input voltage of the inverter must not exceed the maximum value of the model.
3. Opera�on Interface
3.1 Interface View

DC AC Normal Alarm

Pic 3.1 Front panel display

3.2 Status Indicator

There are four LED status indicator lights in the front panel of the inverter. Please see table 3.1
for details.

Indicator status Explanation

on Inverter detects DC input
off Low DC input voltage
on Grid Connected
off Grid Unavailable
on Under normal opera�ng
off Stop opera�ng
on Detected faults or report faults
off Under normal opera�ng

Table 3.1 Status indicator lights

3.3 Bu�ons
There are four keys in the front panel of the Inverter(from le� to right): Esc, Up, Down and
Enter keys. The keypad is used for:

● Scrolling through the displayed op�ons (the Up and Down keys);

● Access to modify the adjustable se�ngs (the Esc and Enter keys).

Esc Up Down Enter

3.4 LCD Display

The two-line Liquid Crystal Display (LCD) is located on the front panel of the Inverter, which
shows the following informa�on:
● Inverter opera�on status and data;
● Service messages for operator;
● Alarm messages and fault indica�ons.
4. Product installa�on
4.1 Select installa�on loca�on
To select a loca�on for the inverter, the following criteria should be considered:
WARNING: Risk of fire
● Do not install the inverter in areas containing highly flammable materials or gases.
● Do not install the inverter in poten�ally explosive atmospheres.
● Do not install in small closed spaces where air can not circulate freely. To avoid overhea�ng,
always make sure the flow of air around the inverter is not blocked.
● Exposure to direct sunlight will increase the opera�onal temperature of the inverter and
may cause output power limi�ng. It is recommended that inverter installed to avoid direct
sunlight or raining.
● To avoid overhea�ng ambient air temperature must be considered when choosing the
inverter installa�on loca�on. It is recommended that using a sun shade minimizing direct
sunlight when the ambient air temperature around the unit exceeds 100°F/40.

Pic 4.1 Recommended installa�on place

● Install on a wall or strong structure capable of bearing the weight.
● Install ver�cally with a maximum incline of +/-15°. If the mounted inverter is �lted to an
angle greater than the maximum noted, heat dissipa�on can be inhibited, and may result in
less than expected output power.
● 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 installa�on environment is helpful to see the inverter LCD display and
indicator status clearly.
● Must offer a ven�late environment if inverter installed in the air�ght house.

Safety Hint:
Do not place or store any items next to the inverter.

1 5

Pic 4.2 Installa�on Angle

 ≥500mm

≥500mm

Pic 4.3 Installa�on Gap

4.2 Inverter Installa�on

The inverter is designed according to the wall mounted type installa�on, please use the wall
mounted (the brick wall of the expansion bolt) when installing.

Anchoring

Moun�ng bracket

Stainless steel screws

Inverter

Pic 4.4 Inverter Installa�on

Procedure shows below:
Locate on the appropriate wall according to the bolt posi�on on the moun�ng bracket, then
mark the hole.On the brick wall, the installa�on must be suitable for the expansion bolt
installa�on.

Pic 4.5 Inverter hanging plate installa�on

2. Ensure that the posi�on of the installa�on holes on the wall is in accordance with the
moun�ng plate, and the moun�ng rack is horizontally placed.
3. Hang the inverter to the top of the moun�ng 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.

Pic 4.6 Inverter installa�on

5 Electrical Connec�on
5.1 DC input terminal connec�on
1. Switch the Grid Supply Main Switch(AC)OFF.
2. Switch the DC lsolator OFF.
3. Assemble PV input connector to the inverter.

Safety Hint:
Please don’t connect PV array posi�ve or nega�ve pole to the ground, it could
cause serious damages to the inverter.

Safety Hint:
Before connec�on, please make sure the polarity of the output voltage of PV
array matches the “DC+” and “DC-” symbols.

Safety Hint:
Before connec�ng inverter, please make sure the PV array open circuit voltage is
within the 550V of the inverter.

Pic 5.1 DC+ male connector (MC4) Pic 5.2 DC- female connector (MC4)

Safety Hint:
Please use approved DC cable for PV system.

Cross section
Cable type
Range Recommended value
Industry generic PV cable 4.0~6.0
4.0(12AWG)
(model: PV1-F) (12~10AWG)

Table 5.1 DC Cable Specifica�ons

The steps to assemble the DC connectors are listed as follows:
a)Strip off the DC wire about 7mm, disassemble the connector cap nut (see picture 5.3)

Pic 5.3 Disassemble the connector cap nut

b) Crimping metal terminals with crimping pliers as shown in picture 5.4.

Pic 5.4 Crimp the contact pin to the wire

c) Insert the contact pin to the top part of the connector and screw up the cap nut to the top
part of the connector. (as shown in picture 5.5).

Pic 5.5 connector with cap nut screwed on

d) Finally insert the DC connector into the posi�ve and nega�ve input of the inverter, shown as
picture 5.6

Pic 5.6 DC input connec�on

Warning:
Sunlight shines on the panel will generate voltage, high voltage in series may
cause danger to life. Therefore, before connec�ng 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 condi�ons.

Warning:
Use the DC power connector of the accessories. Do not interconnect the
connectors of different manufacturers.

5.2 AC input terminal connec�on

Do not close the DC switch a�er 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 installa�on. The specifica-
�ons are as shown in Table 5.2.
Warning:
Prohibit using a single circuit breaker for mul�ple inverters, prohibit the
connec�on of load between inverter circuit breakers.

Model Cable CSA Cable outer dia AWG Breaker Max cable length

SUN-1K-G 2.5mm 15-18mm 12 10A/400V

SUN-1.5K-G 2.5mm 15-18mm 12 10A/400V
Outside cable
SUN-2K-G 2.5mm 15-18mm 12 16A/400V
(L+N+PE)20m
SUN-2.5K-G 2.5mm 15-18mm 12 16A/400V
SUN-3K-G 2.5mm 15-18mm 12 20A/400V

Table 5.2 Cable informa�on

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.

1 2 3 4
1. Matching socket 2.Sleeve 3.Sealing core 4.Sealing nut
Pic 5.7 AC connector structure

Step 3: Use strippers to strip the protec�ve sheath and insula�on layer of the AC cable to the
right length, as shown in Picture 5.8.

Pic 5.8 Strip AC cable

Warning:
Be careful to dis�nguish the L, N and PE of the AC cables.

Step 4: Insert the cable (L, N, PE) into the sealing sleeve and sleeve.
Step 5: Use the screwdriver, loosen the bolts of the socket in turn, and insert each
cable core into the corresponding jack, and set each screw. The connec�on hole of AC
connec�on terminal labeling is shown in picture 5.9.

Pic 5.9 AC Connector Hole Pa�ern

Step 6: Set the sleeve and sealing ring in place.

Step 7: Connect the terminals to the inverter as shown in picture 5.10.

Pic 5.10 AC input connec�on

5.3 The connec�on of the ground line
Good grounding is good for resis�ng surge voltage shock and improving EMI perfor-
mance.Therefore, before connec�ng AC, DC and communica�on cables, you need to ground
the cable firstly. For a single system, just ground the PE cable. For mul�ple machine systems,
all PE cables of the inverter need to be connected to the same grounding copper platoon to
ensure the equipoten�al connec�on. The installa�on of the shell ground wire is shown as
picture 5.11.

Pic 5.11The installa�on of the shell ground wire

Warning:
Inverter has built-in leakage current detec�on circuit,If an external leakage
current protec�on device is connected, its opera�ng current must be greater
than 300 mA or higher, otherwise inverter may not work properly.
5.4 Max. over current protec�on device
In order to protect the inverter AC connec�on, it is recommended to install a circuit breaker to
prevent overcurrent. See table 5.3 below.
Rated output Rated output
Inverter
voltage(V) current(A) device(A)
SUN-1K-G 230 4.3 10
SUN-1.5K-G 230 6.5 10
SUN-2K-G 230 8.7 16
SUN-2.5K-G 230 11 16
SUN-3K-G 230 13.1 20
Table 5.3 Recommended current protector specifica�ons

5.5 Inverter monitoring connec�on

Inverter has the func�on of wireless remote monitoring. The inverter with Wi-Fi func�on is
equipped with Wi-Fi Plug to connect the inverter and network. Wi-Fi Plug's opera�on,
installa�on, Internet access, APP downloading and other processes are detailed in the
instruc�ons.

Smart Phone

GPRS

Internet

WIFI Router Web Server

PC

Pic 5.12 Internet monitoring solu�on

5.6 Installa�on of datalogger
When the inverter is out of the factory, the installa�on loca�on of datalogger is sealed by a
plate as shown in Picture 5.13. When installing the datalogger, remove the sealing plate,
replace it with the sealing plate with square hole in the accessories, and �ghten the screws.
Insert the datalogger into the interface and fix it with a screw. The configura�on of the
datalogger needs to be performed a�er various electrical connec�ons have been completed
and the inverter DC power on. When the inverter is on the DC power, it is determined whether
the datalogger is normally electrified (The LED light shines out of the shell).

Pic 5.13 Datalogger installa�on diagram

5.7 Configura�on of datalogger

For the configura�on of datalogger, please refer to illustra�ons of the datalogger.

6. Startup and Shutdown

Before star�ng the inverter, make sure that the inverter can meet the following condi�ons,
otherwise it may result in fire or damage to the inverter. In this case, we do not undertake
any responsibility. At the same �me, to op�mize the system configura�on, it is recommended
that the two inputs be connected to the same number of photovoltaic modules.

a). The maximum open voltage of each set of photovoltaic modules shall not exceed
550Vdc under any condi�ons.

b). Each input of the inverter be�er use the same type of photovoltaic module in series.

c). Total output power of pv shall not exceed the maximum input power of inverter, each
photovoltaic modules shall not exceed the rated power of each channel.
6.1 Start up the inverter
When start up the single phase string inverter, should fellow below steps
1. First switch on the AC breaker.
2. Turn on the DC switch of the PV module, and if the panel provides sufficient star�ng
voltage and power, the inverter will start.
3. When the AC voltage and DC voltage are normal, the start-up is ready to begin. The
inverter will first check the internal parameters and the grid parameters, while the liquid
crystal will show that the inverter is self-checking.
4. If the parameter is within acceptable range, the inverter will generate energy.
NORMAL indicator light is on.

6.2 Inverter Shutdown

Must follow below steps while shu�ng down the inverter:
1. Switch off the AC breaker.
2. Wait for 30 seconds, turn off the DC switch (if any), or simply disconnect the DC input
connector. The inverter will close the LCD and all indicators within two minutes.

6.3 An�-PID Func�on(op�on)

Inverter
PV+

... PV- V+
L

N
PID
V-

PE

The An�-PID module repairs the PID effect of the PV module at night.The PID module always
runs when connected to AC.
If maintenance is required and turn off the AC switch can disable the An�-PID func�on.

WARNING:
The PID func�onality is automa�c.When the DC bus voltage is below 50VDC, the PID module
will create 450VDC between the PV and ground.No control and equipment are required.

NOTE:
If you need to maintain the inverter, Please turn off the AC switch first,then turn off the DC switch,
and wait 5 minutes before you do other opera�ons.
7. Zero-export func�on (Op�onal)
7.1 Zero-export func�on (Op�on)
The string inverter supports zero-export func�on via Energy meter / Limiter(CT) . Based on
con�nuously data communica�on, once the Limiter or energy meter detects power export to
the grid, it will send the informa�on to the inverter and then inverter will ramp down its ac�ve
power according to match the load demand and achieve zero export. This limiter func�on is
op�onal. If you buy the inverter with zero-export func�on (CT), a current sensor will be
included in the package which is necessary for zero-export func�on.
If you buy the inverter with zero-export func�on via energy meter, an energy meter will be
included in the package which is necessary for zero-export func�on.

7.1.1 Zero-export func�on via energy meter

When you are reading this, we believe that you have completed the connec�on according to
the requirements of chapter 5, if you have been running your inverter at this �me, and you
want to use the zero-export func�on, please turn off AC and DC switch of the inverter, and
wait for 5 minutes un�l the inverter completely discharged. Please follow below Picture 7.1 to
connect the energy meter.
For system wiring diagram, the red line refers to L line (L), the blue line refers to the neutral
line (N), green line refers to ground wire (PE). Connec�ng energy meter RS485 cable to
inverter's RS485 port. It's recommended to install an AC switch between the inverter and the
u�lity grid, the specs of the AC switch are determined by the power of load.
The AC switch we recommend to connect to the inverter output can refer to Table 7.2. If there
is no integrated DC switch inside the inverter you purchased, we commend you to connect the
DC switch. The voltage and current of the switch depend on the PV array you access.

System connec�on diagram for the Eastron meter

Input Output RS 485 GND

1 2
230V/2T
1 3 2 4 5 6 7
L L
A B GND
N N
5 6 7 8 9 10

A B GND 1+COM 2+

3 4

Pic 7.1 EASTRON meter

 Inverter

Solar Panel array

VCC_5V 485_B
1 2
230V/2T
Family load
RS 485
Female connector RS 485 meter
Male connector
GND 485_A 5 6 7 8 9 10

A B GND 1+COM 2+

GND 3 4

485_A
Grid
485_B

RS485
Pic 7.2 Connec�on diagram of EASTRON meter Communication

Pic 7.3 Parameter se�ng

Meter SN:2 When the EASTRON meter connected
Power: 0W successfully, it will shows SN: 2

Warning:
Ensuring grid input cables connect 1&3 port of energy meter, and inverter AC
output cables connect 2&4 port of energy meter when connec�ng.
System connec�on diagram for the CHNT meter

Grid input Output RS 485

1 2 3 4

Pic 7.3 CHINT meter

Inverter

Solar Panel array

VCC_5V 485_B
Family load
RS 485
Female connector RS 485
Male connector
GND 485_A meter

485_A

485_B
Grid
Pic 7.4 Connec�on diagram of CHINT meter

Meter SN:1 Pic 7.4 Parameter se�ng

When the CHNT meter connected successfully,
Power: 0W it will shows SN: 1
7.1.2 Use of zero-export func�on
When the connec�on is completed, the following steps should be refered to use this func�on:
1. Turn on the AC switch.
2. Turn on the DC switch, wai�ng for the inverter's LCD is turned on.
3. Press Enter bu�on on the LCD panel in the main interface into the menu op�ons, select
[parameter se�ng] to enter setup submenu, and then select [running parameters] as shown
in picture 7.3, at this �me please input the default password 1234 through pressing the
bu�on [up down, enter], enter the opera�on parameter se�ng interface, shown as
picture 7.4.

System Param Island OFF

Run Param << Meter OFF <<
Pic 7.3 Parameter se�ng Pic 7.4 Meter switch

4. Operate the bu�on [up down], move se�ng cursor to energy meter and press the bu�on
[enter]. At this �me you can turn on or turn off the energy meter by choosing [up down]
bu�on, please press [enter] bu�on to confirm when se�ng done.
5. Move the cursor to [OK], press [enter] to save the se�ngs and exit the running
parameters page, otherwise the se�ngs are invalid.
6. If set up successfully, you can return to the menu interface, and display the LCD to [home
page] by press the [up down] bu�on. If it displays [meter power XXW], the zero-export
func�on se�ng is completed. Shown as picture 7.5.

Meter Power:
20W
Pic 7.5 Zero-export func�on via energy meter turn on

7. Meter power XXW shows posi�ve means grid is supplying the load, and no power fed into
grid. if meter power shows nega�ve, it means PV energy is being sold to grid or energy meter
wiring connce�on has problem.
8. A�er properly connec�on is done, wait for inverter star�ng. If the power of the PV array
meets the current power consump�on, the inverter will keep a certain output to counteract
the power of the grid without backflow .

7.2 Sensor Clamp(op�onal)

The inverter has integrated export limita�on func�on.The func�on is to adjust the output of
inverter quickly according to the power of the user and solar panels, prevent the output of the
inverter from being fed to the power grid. This limiter func�on is op�onal. If you buy the
inverter with limiter, a current sensor will be included in the package which is necessary for
limiter func�on.
7.2.1 Zero-export func�on via CT
When you are reading this, we believe that you have completed the connec�on according
to the requirements of chapter 5, if you has been running your inverter at this �me, and
you want to use the limiter func�on, please turn off AC and DC switch of the inverter, and
wait for 5 minutes un�l the inverter completely discharged. Then connect the current
sensor to the inverter limiter interface. Make sure they are reliably connected, and the
current sensor should clamp to the live wire of the incoming line. In order to make it easier
for you to use the built-in limiter func�on of the inverter, we have specifically given the
wiring diagram, as shown in Picture 7.1, the red lines connected to the u�lity grid said wire
(L), blue line shows the zero line (N), yellow green line shows the ground wire (PE). We
recommend installing a AC switch between the inverter outlet and the u�lity grid, the specs
of the AC switch is determined according to the load capacity. The AC switch we
recommend to connect to the inverter output can refer to Table 5.1. If there is no integrated
DC switch inside the inverter you purchased, were commend you to connect the DC switch.
The voltage and current of the switch depends on the PV array you access.

(The arrow of current sensor

Pic 7.6 Sensor Clamp points to the grid)

Sensor

L
N
PE
Load Grid

Solar Panel array

Pic7.7 Connec�on diagram of Sensor Clamp

7.3 Use of limiter func�on
When the connec�on is completed, the following steps should be refered to use this func�on:
1. Turn on the AC switch.
2. Turn on the DC switch, wai�ng for the inverter's LCD is turned on.
3. Press Enter bu�on on the LCD panel in the main interface into the menu op�ons, select
[parameter se�ng] to enter setup submenu, and then select [running parameters] as shown
in picture 7.8, at this �me please input the default password 1234 through pressing the
bu�on [up down, enter], enter the opera�on parameter se�ng interface, shown as
picture 7.9.

System Param Meter OFF

Run Param << Limiter 0FF <<
Pic 7.8 Parameter se�ng Pic 7.9 Limit switch

4. Operate the bu�on [up down], move se�ng cursor to limit func�on and press the bu�on [enter].
At this �me you can turn on or turn off the limit func�on by choosing [up down] bu�on, please
press [enter] bu�on to confirm when se�ng done.
5. Move the cursor to [confirm] , press ENTER to save the se�ngs and exit the running parameters
page, otherwise the se�ngs are invalid.

6.If set up successfully, you can return to the menu interface, and display the LCD to [home page]
by press the [up down] bu�on. If it displayed as [u�lity power], the limiter func�on se�ngs will
be completed. Shown as picture 7.10.

Meter OFF Utility Power:

Limiter ON << 20W
* This item is not avaiable for some FW verison
Pic 7.10 Limiter func�on turn on

7. [u�lity power] showing posi�ve means grid power is consuming energy, and there is no
backflow. If [u�lity power] shows nega�ve, which means there’s excess PV energy flows to
grid or current transformer arrow direc�on is in wrong direc�on. Please read more on
chapter 7.9.

8. A�er properly connec�on is done, wait for inverter star�ng. If the power of the PV array
meets the current power consump�on, the inverter will maintain a certain output to
counteract the power of the grid without backflow .
7.4 Notes while using zero export func�on
For your safety and the opera�on of limiter func�on of the inverter, we put forward the
following sugges�ons and precau�ons:

Warning:
Under zero export mode we strongly recommend that the two PV arrays are
formed by the same number of PV panels of the same size, which will make the
inverter more responsive to limit the power.

Safety Hint:
While the u�lity power is nega�ve and inverter has no output power, that means
the orienta�on of the current sensor is wrong, please turn off the inverter and
change orienta�on of the current sensor.
(when using limiter, the arrow of current sensor points to the grid)

7.5 How to browse the load power of your PV grid-�e plant on monitoring pla�orm?
If you want to browse load power of the system and how much energy (KWH) does it export to
gridinverter output power is used to power the load firstly and then the surplus energy will
feed into grid. You also need to connect the meter according to Pic 7.12. A�er the connec�on
completed successfully, the inverter will show the load power on the LCD. But please don’t
setup “Meter ON”. Also, you will be able to browse the load power on the monitoring pla�orm.
The plant se�ng method as below descrip�on.
Firstly, go to the solarman pla�orm(h�ps://pro.solarmanpv.com, this link is for solarman
distributor account; or h�ps://home.solarmanpv.com, this link is for solarman end user
account;) plant home page and click “edit”

And then choose your system type as “Self-consump�on”

Secondly, go to plant page, if it shows the PV power, load power and grid power, which means
the configura�on is correct.
8. General Opera�on
During normal opera�on, the LCD shows the current status of the inverter, including the
current power, total genera�on, a bar chart of power opera�on and inverter ID, etc. Press the
Up key and the Down key to see the current DC voltage, DC current, AC voltage, AC current,
inverter radiator temperature, so�ware version number and Wifi connec�on state of the
inverter.

LCD Main menu

Total DC Power

PV1 and Power

Grid and Freq

E-Day and E-Total Device

Informa�on

Time Fault Record

Start System Param
*Meter ON / OFF
Run Param
*ImpEp Setup
Protect Param
*ExpEp
*PV VA
Comm. Param
*Load

*LoadEp

*Note: These parameters will be avaiable a�er the meter is connected

successfully. Otherwise, it won't show.

Pic 8.1 LCD opera�on flow chart

8.1 The ini�al interface

From the ini�al interface, you can check PV power, PV voltage, grid voltage, inverter ID, model
and other infoma�on.

Power: 0W Power: 0W
State: Standby State: Com.Error
Pic 8.2 The ini�al interface

Press UP or Down, you can check inverter DC voltage, DC current, AC voltage, AC current and
inverter temperature(Temperature can only be seen by long pressing the bu�on [ESC].

PV1: 0.0V 0.0A UC: 0V 0.0A

Power: 0W Freq: 0.00Hz
Pic 8.3 PV input voltage and current Pic 8.4 AC running state informa�on
informa�on

21 - 05 - 2020 Meter
15 : 57 : 08 Power: 0W
Pic 8.6 Time Pic 8.7 Meter power

ImpEp: Daily energy purchased from grid;

ImpEp: 0.00KWh Total: Total energy purchased from grid.

Total : 0.00KWh
Pic 8.8 Electrical energy

ExpEp: Daily energy sold to grid;

ExpEp: 0.00KWh Total: Total energy sold to grid.

Total : 0.00KWh
Pic 8.9 Electrical energy
 Load
Power: 0W
Pic 8.10 Load power

LoadEp: Daily consump�on;

LoadEp: 0.00KWh Total: Total energy consump�on.

Total : 0.00KWh
Pic 8.11 Load consump�on

E-Day: Daily genera�on;

E-Day : 0Wh E-Total: Total genera�on.

E-Total : 134KWh
Pic 8.12 PV genera�on

8.2 Submenus in the Main Menu

There are five submenus in the Main Menu.

8.2.1 Device informa�on

Device Info. << GL3000 SN-01

Fault Record ID:2222224332

ID:2222224332 Inv1400
Inv1400 Lcd0238
Pic 8.13 Device informa�on

You can see the LCD so�ware Lcd0238 and Control So�ware Version Inv1400. In this interface,
there are parameters such as rated power communica�on addresses.
8.2.2 Fault Record
It can keep eight fault records in the menu including �me, customer can deal with it depends
on the error code.

Device Info. 1 F35 220209 02

Fault Record << 2 F35 220120 08
Pic 8.14 Fault Record

8.2.3 ON/OFF se�ng

ON / OFF << Turn ON <<

Setup Turn OFF

Turn ON Turn OFF

OK << Cancel OK << Cancel
Pic 8.15 ON/OFF se�ng

When the inverter is turned off, it will stop working immediately. And, it will be in Off status.
When the "turn on" is �cked again, it will go to self-test program again. If it passed the
dadself-test, it will start to work again.
8.2.5 Parameter se�ng
There are four submenus in the setup.Se�ng includes system param, run param, protect
param, commparam. All of these informa�on for maintenance reference.

Setup << System Param <<

Run Param

Protect Param
Comm. Param <<
Pic 8.17 Submenus of the parameter setup

8.3 System param se�ng

System Param includes �me set, language set, display set and factory reset.

Time Set << Display Set

Language Set Factory Reset <<
Pic 8.18 System Param

20200522 OK English <<

08:11:21 Cancel Polski
Pic 8.19 Time Pic 8.20 Language

Bright Keep << Delay time 05S

Delay time 05S OK << Cancel
Pic 8.21 LCD Screen se�ngs Pic 8.22 Delay �me set

Confirm Reset <<

Cancel
Pic 8.23 Reset to factory se�ng
8.4 Running param set

Note:
Password required-- only for access-authorized engineer. Un-authorized access
may avoid the warranty. The ini�al password is 1234.

PassWord

8.4.1 Ac�veP set Pic 8.24Password

ActiveP 0% Ac�veP: Adjust the output ac�ve power in %

QMode Mul�ple reac�ve power control modes
QMode OFF <<
Pic 8.25

VRated 0.0V
VRated: Grid reference voltage for func�ons including
ReactP 0.0% << Q(U),PF(P),P(U)etc.
Reac�veP: Adjust reac�ve power output in %

PF -1.000 PF:Power Fator

Fun_ISO: Insula�on resistance detec�on
Fun - ISO OFF <<
Pic 8.26
Fun_RCD: Residual current detec�on
Fun - RCD OFF Self-check: Inverter's self-check �me.The
default value 60s
SelfCheck 0s <<
Pic 8.27
Island: An�-islanding protec�on
Island OFF Meter: Energy meter.If inverter will connect
meter,then set here to ON
Meter OFF <<
Pic 8.28
Limiter: If inverter will connect SUN limiter,
Limiter ON << then set here to ON

Feed-in 0%
Pic 8.29
 Feed_In %: it is used to deploy how much
power can be feed into grid.
Feed-in 0% For example, Feed_in=50% of the 6W model,
MPPT Num 0 << which means Max. 3KW power can be feed into grid.
And, this parameter is valid only a�er connec�ng
a meter and the meter func�on is "ON".
Pic 8.30 MPPT NUM:

Meter OFF Meter OFF

LimExMode AVG << LimExMode MIN <-
Export mode: average Export mode: minimum

WindTurbine WindTurbine
ARC OFF <- ARC ON <-
Arc-fault detec�on func�on enable/disable

WindTurbine
ARC CLR <-
Clear arc fault manually
Pic 8.30.2 Arc-Fault Detec�on

ARC ON ARC ON
OFDerate OFF <- OFDerate ON <-
OFDerateOver Frequency Derate

ARC ON OFDerate HYS

OFDerate HYS <- UFUprate OFF <<
HYS:hysteresis of over frequency derate UFUprate:Under Frequency Uprate

OFDerate 0.00 OFDerate HYS

UFUprate ON << UFUprate HYS <<
Pic 8.30.3 ac�ve power droop
WGra 0.000% WGra 0.000%
PU OFF <- PU ON <-

Sunspec OFF Sunspec ON

OK << Cancel OK << Cancel

8.5 Protect Param

Note:
Engineer Only.
We will set the param depends on the safety requirements, so customers don't
need to reset it. The password is same as 8.4 Running param

PassWord

Pic 8.31 Password

00 INMETRO 00 EN50438
00 EN50549 << 00 IEC61727 <<

00 CUSTOM 00 UTE_C15
00 VDE_4105 << 00 RD_1699 <<

00 CEI_0_21 00 AS4777
00 G98_G99 << 00 NB/T 32004

00 NB/T 32004
OK << Cancel
 Note:
Engineer only.

8.6 Comm. param set

Address: 16 << BaudRate: 9600

BaudRate: 9600 Meter: AUTO
Pic 8.33 Data Logger ModbusAddress Pic 8.34 The currently detected meter
9. Repair and Maintenance
String type inverter doesn’t need regular maintenance. However,debris or dust will affect heat
sink’s thermal performance. It is be�er to clean it with a so� brush. If the surface is too dirty
and affect the reading of LCD and LED lamp, you can use wet cloth to clean it up.

Warning:
When the device is running, the local temperature is too high and the touch can
cause burns. Turn off the inverter and wait for it cooling, then you can clean and
maintain.

Warning:
No solvent, abrasive materials or corrosive materials can be used for cleaning
any parts of the inverter.

10.Error informa�on and processing

Inverter has been designed in accordance with interna�onal grid �ed standards for safety,
and electromagne�c compa�bility requirements. Before delivering to the customer the
inverter has been subjected to several tests to ensure its op�mal opera�on and reliability.

10.1 Error code

If there is any failure,the LCD screen will display an alarm message. In this case,the inverter
may stop feeding energy into the grid. The alarm descrip�on and their corresponding alarm
messages are listed Table 10.1

Error code Description Ongrid - Single Phase

F01 DC input polarity reverse fault Check the PV input polarity

F02 DC insula�on impedance Check the grounding cable of inverter.

permanent fault

F03 DC leakage current fault Hardly appear the code. Never ever happened so far

F04 Ground fault GFDI Check the solar panel output connec�on.

F05 Read the memory error Failure in reading memory (EEPROM). Restart the inverter if the
fault s�ll exists, contact your installer or Deye service.

F06 Write the memory error Failure in wri�ng memory (EEPROM). Restart the inverter if the
fault s�ll exists, contact your installer or Deye service.

F07 GFDI blown fuse Hardly appear the code. Never ever happened so far

F08 GFDI grounding touch failure Hardly appear the code. Never ever happened so far

F09 IGBT damaged by excessive drop Hardly appear the code. Never ever happened so far.
voltage
Error code Description Ongrid - Single Phase

F10 Auxiliary switch power supply Hardly appear the code. Never ever happened so far.
failure

F11 Ac main contactor errors Hardly appear the code. Never ever happened so far

F12 AC auxiliary contactor errors Hardly appear the code. Never ever happened so far

F13 Working mode changed/Grid Hardly appear the code. Never ever happened so far.
mode changed

F14 DC firmware over current Hardly appear the code. Never ever happened so far.

1. The internal AC sensor or detec�on circuit on control board

F15 or connec�on wire may loose.
AC firmware over current 2. Restart the inverter, if the error s�ll exists, please contact
your installer or Deye service.

1. This fault means the average leakage current is over 300mA.

Check whether DC power supply or solar panels is ok, then
GFCI(RCD) Ac leakage current check 'Test data'-> 'diL'value is about 120; Then check the
F16 fault leakage current sensor or circuit( the following picture).
Checking test data needs using big LCD.
2. Restart the inverter, if the error s�ll exists, please contact
your installer or Deye service.

F17 Three phase current, Hardly appear the code. Never ever happened so far.
over-current fault

1. Check AC sensor or detec�on circuit on control board or

F18 connec�on wire.
AC over current fault of hardware 2. Restart the inverter or factory reset, if the error s�ll exists,
please contact your installer or Deye service.

F19 All hardware failure synthesis 1. When inverter is running, wifi plug plugin,will occur F19.
2. Restart the inverter or factory reset, if the error s�ll exists,
please contact your installer or Deye service.

F20 DC over current fault of the Not avaiable.

hardware

F21 DC leakage flow fault Hardly appear the code. Never ever happened so far.

F22 Crash stop (if there is a stop Contact your installer for help.
bu�on)

1. This fault means the leakage current is above 30mA suddenly.

Check whether DC power supply or solar panels is ok, then
AC leakage current is transient check 'Test data'-> 'diL'value is about 120; Then check the
F23 over current leakage current sensor or circuit. Check test data needs
using big LCD.
2. Restart the inverter, if the fault s�ll exists, contact your
installer or Deye service.

1. Check Vpe resistance on main board or detec�on on control

board. Check PV panels is OK. Many �mes this issue is the PV
problem.
2. Check whether the PV panel (aluminum frame) is grounded
F24 DC insula�on impedance failure well and inverter is grounded well. Open the cover of inverter
and then check the inside ground cable is fixed well on the shell.
3. Check if the AC/DC cable, terminal block are shorted to ground
or the insula�on is damaged.
4. Restart the inverter, if the fault s�ll exists, contact your installer
or Deye service.

F25 DC feedback fault Hardly appear the code. Never ever happened so far

F26 The DC busbar is unbalanced Hardly appear the code. Never ever happened so far.
Error code Description Ongrid - Single Phase
F27 DC end insula�on error Hardly appear the code. Never ever happened so far

F28 Inverter 1 DC high fault Hardly appear the code. Never ever happened so far

F29 AC load switch failure Hardly appear the code. Never ever happened so far

1 Check relays and AC voltage of relays.

2. Check relays driver circuit.
F30 3. Check if the so�ware is not suitable for this inverter. (Old
AC main contactor failure inverter not have relays detec�on func�on)
4. restart the inverter, if the fault s�ll exists, contact your
installer or Deye service.

F31 Dc boost so� start Not avaiable.

F32 Inverter 2 dc high fault Hardly appear the code. Never ever happened so far

F33 AC over current AC current sensor or its circuit have issue. Check if the inverter
type is not right.

F34 AC current over load Hardly appear the code. Never ever happened so far

1. Check AC grid voltage. Check AC voltage detec�on circuit.

F35 Check if the AC connector in good condi�on. Check whether
No AC grid the AC grid is normal in voltage.
2. Restart the inverter, if the fault s�ll exists, contact your
installer or Deye service.

F36 AC grid phase error Hardly appear the code. Never ever happened so far

F37 AC three-phase voltage unbalance Hardly appear the code. Never ever happened so far.
failure

F38 AC three-phase current unbalance Hardly appear the code. Never ever happened so far.
failure

1. Check AC current sensor and its circuit.

F39 AC over current(one cycle) 2. Restart the inverter, if the fault s�ll exists, contact your
installer or Deye service.

F40 DC over current Hardly appear the code. Never ever happened so far

Check the AC voltage protec�on se�ng. And Check if the AC

F41 AC Line W,U over voltage cable is too thin.Check the voltage difference between LCD and
meter.

Check the AC voltage protec�on se�ng. Check the voltage

F42 AC Line W,U low voltage difference between LCD and meter. Also need to check whether
AC cables are all firmly and correctly connected.

F43 AC Line V,W over voltage Not avaiable.

F44 AC Line V,W low voltage Not avaiable.

F45 AC Line U,V over voltage Not avaiable.

F46 AC Line U,V low voltage Not avaiable.

F47 AC Over frequency Check the frequency protec�on se�ng.

F48 AC lower frequency Check the frequency protec�on se�ng.

F49 U phase grid current DC Hardly appear the code. Never ever happened so far.
component over current

F50 V phase grid current DC Hardly appear the code. Never ever happened so far.
component over current
 Error code Description Ongrid - Single Phase

F51 W phase grid current DC Hardly appear the code. Never ever happened so far.
component over current

F52 AC inductor A, phase current Hardly appear the code. Never ever happened so far.
DC current high

F53 AC inductor B, phase current Hardly appear the code. Never ever happened so far.
DC current high

F54 AC inductor C, phase current Hardly appear the code. Never ever happened so far.
DC current high

1. Check PV voltage and Ubus voltage and its detec�on circuit.

F55 If the PV input voltage exceeds the limit, please reduce the
DC busbar voltage is too high number of solar panels in series.
2. For Ubus voltage, please check the LCD display.

1. It tells the PV input voltage is low and it always happens in the

early morning.
2. Check PV voltage and Ubus voltage. When inverter is running,
F56 DC busbar voltage is too low then showing F56, maybe Loss of driver or need update
firmware.
3. Restart the inverter, if the fault s�ll exists, contact your
installer or Deye service.

F57 AC reverse irriga�on AC reverse irriga�on.

F58 AC grid U over current Hardly appear the code. Never ever happened so far.

F59 AC grid V over current Hardly appear the code. Never ever happened so far.

F60 AC grid W over current Hardly appear the code. Never ever happened so far.

F61 Reactor A phase over current Hardly appear the code. Never ever happened so far.

F62 Reactor B phase over current Hardly appear the code. Never ever happened so far.

1. Check PV module cable connec�on and clear the fault;

F63 ARC fault 2. Seek help from us, if can not go back to normal state.

1. Check temperature sensor. Check if firmware is suitable for

F64 the hardware. Check if the inverter is its right model.
IGBT heat sink high temperature 2. Restart the inverter, if the fault s�ll exists, contact your
installer or Deye service.

Table10.1 Error codes and their solu�ons

Note:
If your string inverter has any of the fault informa�on shown in Table 10-1,and
when you reset the machine and s�ll don’t solve the problem,please contact our
distributor and provide the below details:

1Serial number of the inverter;

2The distributor/dealer of the inverter(if available);
3Installa�on date;
4The discrip�on of problem(include LCD'error code and LED starus indicator lights);
5Your contact details.
11.Specifica�on
Model SUN-1K-G SUN-1.5K-G SUN-2K-G SUN-2.5K-G SUN-3K-G
Input Side
Max.DC Power(kW) 1.3 2 2.6 3.3 3.9
Max.DC Input Voltage(V) 550
Start-up DC Input Voltage(V) 80
MPPT Opera�ng Range(V) 70~500
Max.DC Input Current(A) 13
Max. Short Circuit Current (A) 19.5
Number of MPPT/Strings per MPPT 1/1
MAX inverter backfeed current (A) 0
Output Side
Rated Output Power(kW) 1 1.5 2 2.5 3
Max.Ac�ve Power(kW) 1.1 1.65 2.2 2.75 3.3
Rated AC Grid Voltage(V) 220/230(Op�onal)
AC Grid Voltage Range(V) 160 ~300 (this may vary with grid standards)
Rated Grid Frequency(Hz) 50/60(Op�onal)
Opera�ng Phase Single phase
Rated AC Grid Output Current(A) 4.3 6.5 8.7 10.9 13
Max.AC Output Current(A) 4.8 7.2 9.6 12 14.3
Maximum output fault 8.2 12.4 16.6 21.0 24.9
current (a.c. A, peak )
Maximum output overcurrent 9.1 13.8 18.5 23.3 27.6
protec�on (a.c. A,peak)
Output Power Factor 0.8 leading~0.8 lagging
Grid Current THD <3%
DC Injec�on Current(mA) <0.5%
Grid Frequency Range 47-52 or 57-62op�onal
Efficiency
Max.Efficiency 97.3% 97.3% 97.3% 97.3% 97.5%
Euro Efficiency 97.1% 97.1% 97.1% 97.1% 97.3%
MPPT Efficiency >99%
General Data
Size(mm, W×H×D) 280×272.5×184
Weight(kg) 4.8
Topology Transformerless
Internal consump�on <1W(Night)
Opera�ng temperature -25 ~ 65, >45 dera�ng
Ingress protec�on IP65
Noise Emission(Typical) <25dB
Cooling Concept Natural cooling
Max. opera�on al�tude 2000m
Designed Life�me >20 Years
CEI 0-21,VDE-AR-N 4105,NRS 097,IEC 62116,IEC 61727,G99,G98,
Grid Connec�on Standard
VDE 0126-1-1,RD 1699,C10-11
Opera�on surrounding humidity 0~100%
Safety EMC / Standard IEC/EN 62109-1,IEC/EN 62109-2IEC/EN 61000-6-1,IEC/EN 61000-6-2,IEC/EN 61000-6-3,IEC/EN 61000-6-4
General Data
DC Connec�on MC-4 mateable
AC Connec�on IP65 rated plug
Display LCD1602
Interface RS485/RS232/Wifi/LAN
 Ver: 2.1, 2021-12-23
30240301000810 Ver: 2.2, 2022-02-22