Sunways STT-29.9KTL User manual

SUNWAYS TECHNOLOGIES CO., LTD.
Grid-connected Inverter
STT 30-60KTL
User Manual
EN

CONTENTS
1 Preface ……………………………………………………… 5
1.1 Overview ………………………………………………………………………… 5
1.2 Target Groups …………………………………………………………………… 5
2 Safety Instructions ……………………………………… 6
2.1 Safety Notes ……………………………………………………………………… 6
2.2 Statement ………………………………………………………………………… 6
2.3 Important Safety Matters ……………………………………………………… 7
2.4 Symbols Explanation …………………………………………………………… 8
3 Product Description ……………………………………… 11
3.1 Basic Features ………………………………………………………………… 11
3.2 Physical Layout ……………………………………………………………… 13
3.3 Display Interface ……………………………………………………………… 16
3.4 Packing List …………………………………………………………………… 17
4 Installation ………………………………………………… 19
4.1 Location ………………………………………………………………………… 19
4.2 Mounting ……………………………………………………………………… 21
4.3 External ground connection ………………………………………………… 23
4.4 Electrical Connection ………………………………………………………… 24
4.5 Monitoring Device Installation ……………………………………………… 33
4.6 Meter/RS485/DRED Connection …………………………………………… 34
5 Start and Stop ……………………………………………… 39
5.1 Start the Inverter ……………………………………………………………… 39
5.2 Stop the Inverter ……………………………………………………………… 39
6 General Operation ………………………………………… 40
6.1 Display Operation …………………………………………………………… 40
6.2 Country Code (Safety Code) Setting ……………………………………… 41
6.3 Auto-Test ……………………………………………………………………… 42
6.4 Power Quality Response Modes …………………………………………… 43
6.5 Online Monitoring APP ……………………………………………………… 43
7 Troubleshooting …………………………………………… 44
7.1 Error Message ………………………………………………………………… 44
7.2 Maintenance …………………………………………………………………… 47
8 Technical Parameters …………………………………… 48

4 5
Attention
The products, services or features purchased are subject to the commercial contracts
and terms of Sunways technologies Co., Ltd. All or part of the products, services or
features described in this document may not be within purchased. Unless otherwise
agreed in the contract, the Company shall not make any express or implied declara-
tion or guarantee of the contents of this document.
Due to product version upgrades or other reasons, the contents of this document will
be updated periodically. Unless otherwise agreed, this document serves only as a
guide to use, and all statements, information and recommendations in this document
do not constitute any express or implied guarantee.
1 Preface
※ 1.1 Overview
This manual is an integral part of Sunways STT 30-60KTL series three-phase inverters
(hereinafter referred to as the inverter). It mainly introduces the assembly, installation,
electrical connection, maintenance and troubleshooting of the products. Before installing
and using the inverter, please read this manual carefully, understand the safety informa-
tion and be familiar with the functions and characteristics of the inverter.
※ 1.2 Target Groups
This manual is applicable to the electrical installers with professional quali󽗉cations and
end-users. If there are any problems in the installation process, please call Sunways ser-
vice telephone at [phone] or email Sunways at [e-mail] for
consultation.
1 PrefaceAttention

6 7
2 Safety Instructions
2 Safety Instructions2 Safety Instructions
※ 2.1 Safety Notes
① Before installation, please read this manual carefully and follow the instructions in this
manual strictly.
② Installers need to undergo professional training or obtain electrical related profession-
al quali󽗉cation certi󽗉cates.
③ When installing, do not open the front cover of the inverter. Apart from performing
work at the wiring terminal (as instructed in this manual), touching or changing compo-
nents without authorization may cause injury to people, damage to inverters and annul-
ment of the warranty.
④ All electrical installations must conform to local electrical safety standards.
⑤ If the inverter needs maintenance, please contact the local designated personnel for
system installation and maintenance.
⑥ To use this grid-connected inverter for power generation needs the permission of the
local power supply authority.
⑦ The temperature of some parts of the inverter may exceed 60° C during operation. To
avoid being burnt do not touch the inverter during operation. Let it cool before touching
it.
⑧ When exposed to sunlight, the PV array generates dangerous high DC voltage. Please
operate according to our instructions, or it will result in danger to life.
※ 2.2 Statement
Sunways Technologies Co.,Ltd. has the right not to undertake quality assurance in any of
the following circumstances:
① Damages caused by improper transportation.
② Damages caused by incorrect storage, installation or use.
③ Damages caused by installation and use of equipment by non-professionals or un-
trained personnel.
④ Damages caused by failure to comply with the instructions and safety warnings in this
document.
⑤ Damages of running in an environment that does not meet the requirements stated in
this document.
⑥ Damages caused by operation beyond the parameters speci󽗉ed in applicable technical
speci󽗉cations.
⑦ Damages caused by unauthorized disassembly, alteration of products or modi󽗉cation
of software codes.
⑧ Damages caused by abnormal natural environment (force majeure, such as lightning,
earthquake, 󽗉re, storm, etc.).
⑨ Any damages caused by the process of installation and operation which don't follow
the local standards and regulations.
⑩ Products beyond the warranty period.
※ 2.3 Important Safety Matters
Table below shows the symbols that may appear in this document and their de󽗉nition:
Danger
Dangerous situation, if not avoided, it could result in death or serious personal injury.
Warning
Potentially dangerous situation, if not avoided, may result in death or serious personal
injury.
Caution
Potentially dangerous situation, if not avoided, may result in moderate or minor person-
al injury.

8 9
※ 2.4 Symbols Explanation
This chapter mainly elaborates the symbols displayed on the inverter, nameplate and
packing box.
Attention
The safety warning information about equipment or environment, to prevent equipment
damage, data loss, equipment performance degradation or other unpredictable results.
Note
Symbol highlights important information, best practices and tips, etc.
2.4.1 Symbols on the Inverter
2.4.2 Symbol on the Inverter nameplate
Inverter status indicator.
Inverter running indicator.
Grounding symbol, the inverter casing needs to be properly grounded.
The inverter cannot be disposed of with household waste.
Please read the instructions carefully before installation.
Do not touch any internal parts of the inverter until 5 min after being disconnected from
the mains and PV input.
CE mark, the inverter complies with the requirements of the applicable CE guidelines.
TUV certi󽗉cation.
Danger. Risk of electric shock!
The surface is hot during operation and no touch is allowed.
2 Safety Instructions2 Safety Instructions

10 11
Electric shock hazard, live parts, risk of electric shock, do not touch.
2.4.3 Symbol on the Packing box
Handle with care.
This side up.
Keep dry.
Stacked layers.
3 Product Description2 Safety Instructions
3 Product Description
※ 3.1 Basic Features
3.1.1 Function
The Sunways STT 30-60KTL series inverter is a three-phase grid-connected PV inverter which used to
e󽗋ciently convert the DC power generated by the PV strings Into AC power and feed it into the grid.
3.1.2 Models
The STT 30-60KTL series inverter includes 11 models which are listed below:
STT-29.9KTL、STT-30KTL、STT-33KTL、STT-36KTL、STT-40KTL、STT-45KTL、STT-50KTL-M、
STT-60KTL-M、STT-40KTL-HV、STT-50KTL-HV、STT-60KTL-HV
3.1.3 Applicable grid type
The applicable grid types for the Sunways STT 30-60KTL series are TN-S, TN-C, TN-C-S, IT and TT. When ap-
plied to the TT grid, the voltage of N to PE should be less than 30V.
STT-29.9KTL, STT-30KTL, STT-33KTL,STT-36KTL,STT-40KTL,STT-45KTL,STT-50KTL-M,STT-60KTL-M connec-
tion mode see Figure 3-1 for details.
STT-40KTL-HV, STT-50KTL-HV, STT-60KTL-HV connection mode see Figure 3-2 for details.
Figure 3-1 400V output inverter applicable grid type
Sunways
STT Series
TN-S
Transformer
Sunways
STT Series
TN-C
Transformer
Sunways
STT Series
TN-C-S
Transformer
Sunways
STT Series
TT
Transformer
Sunways
STT Series
IT
Transformer
4

12 13
3 Product Description 3 Product Description
3.1.4 Storage conditions
① Inverter must be stored in its original packaging.
② The storage temperature and humidity should be in the range of -30℃ and+ 60℃ , and
less than 90%, respectively.
③ If a batch of inverters needs to be stored, the height of each pile should be no more
than 4 levels.
Figure 3-2 500V output inverter applicable grid type
※ 3.2 Physical Layout
Figure 3-3 Front view
3.2.1 Inverter front view
400mm
600mm
LOGO
Display
3.2.2 Inverter side view
Figure 3-4 Side view
400mm
270mm
Name
Plate

14 15
3 Product Description 3 Product Description
DC Switch (Optional)
Figure 3-5 Bottom view
3.2.3 Inverter Bottom View
DC Switch (Optional)
Com2 Port
AC Output Terminal
270mm
DC Input Terminal
Com1 Port
Com3 Port
Wiring terminals are at the bottom of the inverter, as shown in the table below.
Item Terminal Note
1 DC Input terminal PV connector
2 COM 1 Port WiFi/LAN/GPRS/4G device connector
3 COM 2 Port Meter connector
4 COM 3 Port RS485 connector
5 AC Output Terminal Used for AC output cable connection
Figure 3-6 Inverter back view
3.2.4 Inverter back view
back rail
back rail
back rail
back rail
※ 3.3 Display Interface
Sunways
Figure 3-7 Display interface

16 17
3 Product Description 3 Product Description
Item Indicator Status Description
1Power
Indicator
O󽗈 No input voltage detected or input voltage is too low.
Slow 󽗊ashing Inverter powered on, waiting for the grid connection.
Quick 󽗊ashing Inverter detected grid power and entered self-test status.
On Normal, grid-connected and power generated.
2Alarm
Indicator
On An alarm or faults detected, specific fault information can be
viewed from the display.
O󽗈 The inverter is running normally.
Slow 󽗊ashing The monitoring device is not connected to the router or is not
connected to internet.
Quick 󽗊ashing The monitoring device is connected to the router or connected to
internet but not connected to the server.
3OLED
Display
On Display the inverter operating information.
O󽗈 If the button pressed without any response, the screen is faulty or
not well connected.
4 Button Physical button Switch OLED display information and set parameters by short
press and long press.
※ 3.4 Packing List
The package of the inverter includes the following accessories. Please check whether the
accessories in the packing box are complete when receiving the goods. See Figure 3-8 for
the packing list.
Inverter×1 Back Bracket×1
PV Terminal ×8 Monitoring Device(Optional)×1
M10 Bracket Screw×4 120Ω terminal resistance x1

18 19
3 Product Description 3 Product Description
Figure 4-1 Recommended installation location
4 Installation
※ 4.1 Location
The Sunways STT 30-60KTL series inverters designed with IP66 protection enclosure for
indoor and outdoor installations. When selecting an inverter installation location, the fol-
lowing factors should be considered:
① The wall on which the inverters mounted must be able to withstand the weight of the
inverter.
② The inverter needs to be installed in a well-ventilated environment.
③ Do not expose the inverter directly to strong sunlight to prevent excessive temperature
operation. The inverter should be installed in a place with shelter to prevent direct expo-
sure to sunlight and rain.
④ Install the inverter at eye level for easy inspection of screen data and further mainte-
nance.
⑤ The ambient temperature of the inverter installation location should be between -30℃
and 60℃ .
⑥ The surface temperature of the inverter may reach up to 75℃ . To avoid risk of burns,
do not touch the inverter while it's operating and inverter must be installed out of reach-
ing of children.
4.1.1 Installation location
Recommended installation location of the inverter, as shown in Figure 4-1:
Figure 3-8 Packing list
Inspection
Report
User
Manual
Quick
Guide
User Guide
Meter Communication
Terminal（Optional）
RS485 Communication
Terminal（Optional）
AC Terminal ×1

20 21
4 Installation 4 Installation
Warning
Do not put 󽗊ammable and explosive articles around the inverter.
Figure 4-3 Recommended installation angle
4.1.2 Installation Spacing
Figure 4-2 Recommended installation spacing
4.1.3 Installation Angle
The requirements for inverter installation spacing are shown in Figure 4-2:
The installation angle of the inverter is recommended as shown in Figure 4-3:
1000mm 800mm
800mm
500mm 500mm
500mm 500mm
x
≥ 15
。
※ 4.2 Mounting
① Use the inverter back bracket as the template to mark the position of 4 holes on instal-
lation bracket.
② Use an electrical driller with 12mm diameter bit to drill 4 holes on the installation
bracket. See Figure 4-5 for details:
Figure 4-5 Mark the hole position
Figure 4-4 Dimensions of wall bracket
4.2.1 Wall bracket installation
Dimensions of wall bracket, see Figure 4-4:
12mm
29mm
284mm
470mm
208mm
√ √×

22 23
4 Installation 4 Installation
Figure 4-6 Fixing the bracket
③ Follow the instructions in the picture below to install the M10 assembling bolts (bolt,
spring washer, 󽗊at washer) and tighten the bolts with torque wrench in the torque of 35-
40N.m, see Figure 4-6 for details:
Lift the inverter, hang the back rail on the 󽗉xed back bracket carefully. See Figure 4-7 for details:
Figure 4-7 Mounting the inverter
4.2.2 Mounting the inverter
Handle
Handle
※ 4.3 External ground connection
Ground terminal connection steps:
① The external grounding terminal is located in the lower right side of the inverter.
② Fix the grounding terminal to the PE wire with a proper tool and lock the grounding
terminal to the grounding hole in the lower right side of the inverter, as shown in Figure
4-8.
Danger
Do not connect the N-wire as a protective ground wire to the inverter casing. Otherwise,
it may cause electric shock.
Attention
Good grounding is good for resisting surge voltage shock and improving EMI perfor-
mance. Inverters must be well-grounded.
For a system with only one inverter, the PE cable needs to be grounded.
For a multi-inverter system, all inverters PE wires need to be connected to the same
grounding copper bar to ensure equipotential bonding.
Figure 4-8 Grounding terminal connection

24 25
4 Installation 4 Installation
※ 4.4 Electrical Connection
Danger
A high voltage in the conductive part of the inverter may cause an electric shock. When
installing the inverter, make sure that the AC and DC sides of the inverter are completely
de-energized.
Warning
Do not ground the positive or negative pole of the PV string, otherwise it will cause seri-
ous damage to the inverter.
Warning
Static may cause damage to the electronic components of the inverter. Anti- static mea-
sures should be taken during installation and maintenance.
Attention
Do not use other brands or other types of terminals other than the terminals in the ac-
cessory package. Sunways has the right to refuse all damages caused by the mixed-use
of terminals.
Attention
Moisture and dust can damage the inverter, ensure the cable gland is securely tightened
during installation. The warranty claim will be invalidated if the inverter is damaged as a
result of using poorly connected cable connector.
1. The following must be considered when making electrical connections to the inverter:
① Disconnect the AC breaker switch on the grid side.
② The DC switch of the inverter must be turned to the "OFF" position.
③ For best practice, ensure PV modules of the same model and speci󽗉cations are con-
nected in each string.
④ Make sure the maximum output voltage of each PV string does not exceed 1100V.
4.4.1 Inverter PV string connection
4 Installation 4 Installation
2. DC connector assembly procedure
① Select the appropriate photovoltaic cable:
Cable Type Traverse Area (mm²)
General photovoltaic
cable
Range (mm2) Recommended value (mm2)
2.5-4.0 4.0
Figure 4-9
② Peel o󽗈 the DC cable insulation sleeve for 7 mm, as shown in Figure 4-9:
Wire Traverse area 2.5-4mm27mm
③ Disassemble the connector in the accessory bag, as shown in Figure 4-10:
④ Insert the DC cable through the DC connector nut into the metal terminal and press the ter-
minal with a professional crimping plier (pull back the cable with some power to check if the
terminal is well connected to the cable), as shown in Figure 4-11:
Figure 4-10
+
-

26 27
4 Installation 4 Installation
⑤ Insert the positive and negative cables into the corresponding positive and negative con-
nectors, pull back the DC cable to ensure that the terminal is tightly attached in the connec-
tor.
⑥ Use an open-end wrench to screw the nut to the end to ensure that the terminal is well
sealed, as shown in Figure 4-12:
3.Insert the positive and negative connectors into the inverter DC input terminals respec-
tively, a click sound should be heard if the terminals are well connected, as shown in Fig-
ure 4-13:
Figure 4-11
Crimping Plier
Figure 4-12
Open-end Wrench
Warning
① Before assembling the DC connector, make sure that the cable polarity is correct.
② Use a multimeter to measure the voltage of the DC input string, verify the polarity of
the DC input cable, and ensure that each string voltage is within 1000V.
Figure 4-13
DC Switch
Inverter
PE
PE
L3
N
To grounding electrode
-
-
+
+AC Breaker
DC INPUT AC OUTPUT
Figure 4-14
4. Seal the unused PV terminals with the terminal caps.
5. System Layout of Units without Integrated DC Switch
Local standards or codes may require that PV systems are fitted with an external DC
switch on the DC side. The DC switch must be able to safely disconnect the open-circuit
voltage of the PV array plus a safety reserve of 20%. Install a DC switch to each PV string
to isolate the DC side of the inverter. We recommend the following electrical connection,
as shown in Figure 4-14:
L2
L3
Grid

28 29
4.4.2 Connection of AC output
1. AC side requirements
Before connecting to the power grid, make sure that the power grid voltage and frequen-
cy meet the requirements of the inverter. See technical parameters for details.
① AC Circuit Breaker
The rated output voltage and recommended AC breaker speci󽗉cations of Sunways STT
30-60KTL three-phase inverter as shown in the table below:
Model Inverter Rated
Output Voltage
AC Breaker
Rated Voltage
AC Breaker
Rated Current
STT-29.9KTL 400V 400V 63A
STT-30KTL 400V 400V 63A
STT-33KTL 400V 400V 63A
STT-36KTL 400V 400V 80A
STT-40KTL 400V 400V 80A
STT-45KTL 400V 400V 100A
STT-50KTL-M 400V 400V 100A
STT-60KTL-M 400V 400V 125A
STT-40KTL-HV 500V 690V 63A
S-50KTL-HV 500V 690V 80A
STT-60KTL-HV 500V 690V 100A
4 Installation 4 Installation
Warning
An AC breaker must be connected on the AC side of the inverter.
Any loads cannot be connected to the inverter without the AC breaker.
② Aluminium cable requirements
If you choose aluminum wire, please riveting the copper-aluminum conversion terminal
to avoid direct contact between the copper bar and the aluminum wire.
Caution
Direct contact between the copper bar and aluminium wire may arise electrochemical
corrosion, thus a󽗈ect the reliability of the electrical connection.
If you choose aluminum wire, please riveting the copper-aluminum conversion terminal
to avoid direct contact between the copper bar and the aluminum wire.Copper-alumi-
num conversion terminal needs to be purchased separately, please purchase by yourself
or consult Sunways for purchase.
15
+
1
Figure 4-15
70
+
1
copper
aluminum
Cross-sectional Area : 35mm² MAX
The purchased copper-aluminum conversion terminal needs to meet the dimensions
marked in Figure 4-16 below：

30 31
4 Installation 4 Installation
2. AC connector connection steps
① peel the insulation sleeve of AC cable o󽗈 for 95~100mm, and peel o󽗈 the end of 3L /PE
/ N wires for 20~25mm, as shown in Figure 4-17:
② Thread the stripped wire into the lock nut and the main body in turn (the 󽗊exible wire
needs to be riveted to the insulated terminal), as shown in Figure 4-18:
Figure 4-18
Figure 4-19
③ Insert the cable into the rubber core in the wire sequence, and observe whether the
cable is plugged in place through the perspective hole, and 󽗉nally crimp it with a screw-
driver, as shown in Figure 4-19:
Figure 4-17
95~100mm
20~25mm
N
PE
}L
Outside Diameter : 20~40mm² Cross-sectional Area : 10mm²~25mm²
③ PE wire requirements
Phase wire
cross section S
PE wire cross
section Note
S ≤ 16 mm² S The speci󽗉cations are valid only when the phase wire and PE wire
use the same material. If otherwise, ensure that the cross section of
the PE wire produces a conductance equivalent to that of the wire
speci󽗉ed in the table.
S ＞ 35 mm² S/2
Figure 4-16
6.00
40.00
9.30
18.00

32 33
4 Installation 4 Installation
Figure 4-21
⑤ Tighten the nut with an openended wrench and complete the installation with a "click,
click, click", as shown in Figure 4-21:
※ 4.5 Monitoring Device Installation
Sunways STT 30-60KTL series three phase inverter supports WIFI, GPRS, LAN, 4G and
RS485 communication.
Plug the WIFI, LAN, 4G or GPRS module into the COM1 port at the bottom of inverter (as
shown in Figure 4-22). A slight "click" sound during the installation represents that the
assembly is in place.
Figure 4-22 Monitoring device installation
Note
1. The 4G, and GPRS version module does not need to be con󽗉gured.
2. The WiFi version module needs to be con󽗉gured to the router for the 󽗉rst installation.
If the router name or password are changed, the WiFi dongle will need to be recon󽗉g-
ured. For details, please refer to the [QUICK INSTALLATION GUIDE] which is attached to
the accessory bag.
3. If DHCP is enabled on the router, the LAN version module does not need to be con󽗉g-
ured. Otherwise, please refer to the [QUICK INSTALLATION GUIDE] which is attached to
the accessory bag.
Attention
Do not touch the waterproof plug in the card slot except for replacing the SIM card. In
that case, please make sure the card slot is completely sealed by the weatherproof plug
after replacing the SIM card. Any damages caused by improper waterproof plug place-
ment, will void warranty.
④ Insert the 󽗊at cable of the display back to its place and put back the right roof cover
and lock with its original screws. As shown in Figure 4-20:
Figure 4-20

34 35
4 Installation 4 Installation
STT 30-60KTL series three-phase inverter supports multiple inverters daisy-chain connec-
tion to a data logger via RS485 communication.
Multiple inverters connection diagram as shown in Figure 4-24:
4.6.2 RS485 Communication
Figure 4-24
STT 30-60KTL
series inverter STT 30-60KTL series inverter STT 30-60KTL series inverter
Data logger
Sunways server
InternetInternet
RS485 RS485 RS485
Router
...
※ 4.6 Meter/RS485/DRED Connection
Inverter communication ports are located under the COM1 port at the bottom of the In-
verter，including RS485 port(used for Data logger connection) and Meter port, as shown
in Figure 4-23:
4.6.1 Terminals de󽗉nition
Port Function NO. De󽗉nition
COM2 Meter
Connect external Meter (with
3CTs) to activate the Export
Limitation & control function on
Sunways STT 30-60KTL series
inverter.
1 485-A2
2 485-B2
COM3 RS485
ln case of multiple inverters, all
the inverters can be daisy-
chained via RS485 cables.
1
2
3
4
5
485-A1
485-B1
GND
485-A1
485-B1
Figure 4-23
Di󽗈erent versions of the inverter have di󽗈erent terminals, which are de󽗉ned as follows:
Export limitation & control or power limit solution, wiring instructions and con󽗉guration,
please contact Sunways after-sales at [e-mail].
4.6.3 Export limitation & control or power limit solution
The maximum distance between the inverter at the end of the daisy chain and the Data
logger should be within 1000m.
Attention
It is recommended to use the RS485 communication cable with a cross sectional area of
0.75-1.5mm² and an outer diameter of 5mm-10mm.
RS485 cable requirements: Shielded twisted-pair cable or shielded twisted Ethernet ca-
ble.
1
21
2
3
45

36 37
4 Installation 4 Installation
4.6.4 Wiring Steps
Figure 4-25
Connection of RS485
Please connect the cables in order as shown in the right table in Figure 4-26:
N
O
25mm
NO. Function
1 485-A2
2 485-B2
6.5mm
25mm
① Unscrew the plugs of the RS485 port and Meter port on the inverter.
② Dismount the terminal，and put the cable through the plate.
Di󽗈erent cables and connection methods should be applied for di󽗈erent functions. Please
follow the connection steps in accordance to the function in need.
Figure 4-25
6.5mm
25mm
5-Pin
6-Pin
NO. Function
1 485-A1
2 485-B1
3 GND
4 485-A1
5 485-B1
Figure 4-26
Connection of Meter
Please connect the cables in order as shown in the right table in Figure 4-25:
If there are multiple inverters in a project, connect them in a daisy chain via RS485 com-
munication.The last inverter needs to be connected to a 120Ω terminal resistor. The wir-
ing sequence is shown in Figure 4-27 below:
Figure 4-25
6.5mm
25mm
5-Pin
6-Pin
Figure 4-27
NO. Function
1 485-A1
2 485-B1
3 GND
4 120Ω terminal
resistance
5

38 39
4 Installation
5 Start and Stop
※ 5.1 Start the Inverter
When starting the inverter, follow these steps:
① Turn on the AC breaker 󽗉rst (close the AC circuit breaker).
② Turn on the DC switch at the bottom. If the PV input voltage higher than the inverter
start-up voltage, the inverter will start.
③ When both AC and DC power supply are normal, the inverter is ready to start. The in-
verter will initiate checking its internal parameters and grid parameters, if it is within the
range, the green light on the left side of the screen begins to 󽗊ash, and the “Waiting”
message will be displayed on the OLED display.
④ After self-checking completed, the inverter will start generating electricity, the green
light will remain on, and the OLED display will display real-time power information.
※ 5.2 Stop the Inverter
When stopping the inverter，follow these steps：
① Turn o󽗈 the AC breaker 󽗉rst.
② Wait 30 seconds and then turn the DC switch to the “OFF”. At this time, there is re-
maining power in the inverter capacitor. Wait for 5 minutes until the inverter is complete-
ly de-energized before conducting any work on the inverter.
③ Disconnect the AC and DC cables.
5 Start and Stop
Figure 4-28
③ Connect the terminal to the right position onto the inverter，as shown in Figure 4-28: