Stealth ST-INV-T10.0 User manual
USER MANUAL
ST-INV-T10.0
PV grid-connected energy
storage inverter
VER:1.1
User Manual
I
About this manual
This manual mainly introduces the product information, Installation, operation
and maintenance guidelines of the photovoltaic energy storage and grid-
connected integrated machine. It does not contain all the information of the
photovoltaic system. You can log on to www.stealthenergy.cn or the equipment
manufacturer's website for more information.
Scope of application
This manual is applicable to the following models of string-type photovoltaic
energy storage grid-connected machines:
• ST-INV-T10.0
Unless otherwise specied, hereinafter referred to as inverter.
To the reader
This manual is inte nded for professional technicians who Install, operate and
maintain the inverter, as well as end users who need to view inverter information.
Manual use
Please read the manual carefully before using the product, and keep the manual
in a place where it is easily accessible.
The contents of the manual and the pictures, logos, symbols, etc. used are owned
by Suzhou Stealth Energy Technology Co., Ltd. Persons who are not inside the
company are not allowed to publicly reproduce all or part of the content without
written authorization.
The content of the manual will be continuously updated and revised, the user
please refer to the actual product purchased, and can pass the www.stealthenergy.
cn or sales channels to obtain the latest version of the manual.
User Manual User Manual
II III
Symbol usage
In order to ensure the personal and property safety of users when using the
product, and to use the product more efficiently and optimally, the manual
provides relevant safety information, which is highlighted by the following
symbols.
Please carefully understand the meaning of the warning symbols so that you can
use the manual better.
Symbol Description
A highly potentially hazardous situation which, if not
avoided, will result in death or serious injury.
Moderately hazardous, which, if not avoided, could result in
death or serious injury.
！CAUTION
Low potential hazard situation which, if not avoided,could
result in moderate or minor injury to persons
There is a low potential hazard, and if not avoided, may
cause the equipment to fail to operate normally or cause
property damage.
Emphasizes and complements content, or provides tips
using the product that can help you solve a problem or
save time.
DANGER
WARNING
NOTICE
About This Manual
1Safetyinstruction 1
1.1Generalsalfetyinstruction 1
1.2inverter 2
1.3Skillsrequirementsforprofessionalandtechnicalpersonnel 3
2Productdescription 4
2.1Grid-connectedPVenergystoragesystem 4
2.2Poductintroduction 5
2.2.1Modeldescription 5
2.2.2Apperance 5
2.2.3Dimensionsandweight 6
2.2.4LEDindicatorlight 6
2.3Functiondescription 7
2.4Workingmode 8
3Unpackingandstorage 11
3.1Unpackinginspection 11
3.2Identicationofinverter 11
3.3Deliverylist 12
3.4Storageofinverter 12
4MechanicalInstallation 13
4.1InstalltionPrecautions 13
4.2ChoosetheInstallationsite 13
4.3Installationtoolsandparts 16
4.4Installationofinverter 17
5Electricalconnection 19
5.1Terminalintroduction 20
5.2Overviewofelectricalconnection 21
5.3Groundconnection 22
5.4Gridandback-upconnection 23
5.4.1ACsiderequirements 23
5.4.2AssemblingthecabletotheAC&Back-upconnector 24
5.5PVseriesconnection 27
5.5.1PVInputConguration 27
5.5.2AssemblingthecabletothePVconnector 29
User Manual User Manual
IV 1
1 Safety instruction
Inverter machine is designed and tested in strict accordance with relevant
international safety standards. As electrical and electronic equipment, relevant
safety regulations must be observed during its Installation, commissioning,
operation and maintenance. Unreasonable use or misuse may result in:
• Harm the life and personal safety of the operator or a third party
• Damage the inverter or other property belonging to the operator/third party
In order to avoid personal injury, damage to the inverter or other equipment,
please strictly follow the following safety precautions. The specific precautions
during the operation will be explained in the corresponding chapters.
1.1 General salfety instruction
PV panels
Please follow the various instructions for photovoltaic panels.
Utility grid
Please follow the access of local grid.
All electrical connections must meet local and national electrical codes.
The inverter can only be connected to the grid with permission from the local
power department.
Fatal voltage dangerFatal voltage danger
Exposure of PV strings to sunlight will generate dangerous voltages.Exposure of PV strings to sunlight will generate dangerous voltages.
Since the energy storage battery system may cause the danger of electric shock Since the energy storage battery system may cause the danger of electric shock
and short circuit, in order to avoid possible accidents. All electrical connections and short circuit, in order to avoid possible accidents. All electrical connections
are required and should only be done by professional technicians.are required and should only be done by professional technicians.
DANGER
NOTICE
5.5.3InstallingthePVConnector 30
5.6Batterycableconnection 31
5.6.1Requirementsonthebatteryside 31
5.6.2AssemblingthecabletotheBatconnector 32
5.6.3InstallingtheBatConnector 33
5.7Type-Ccommunicationconnection 34
5.8MeterConnection 34
5.9DREDConnection 36
5.10BMSConnection 37
6Testoperation 38
6.1Inspectionbaforetestrun 38
6.2Testrunsteps 38
7Decommissioning,dismantling,anddiscardingInverter 39
7.1Decommissioning 39
7.2Dismantling 40
7.3Discarding 40
8Troubleshootingandmaintanance 41
8.1Troubleshooting 41
8.1.1TroubleshootinginAPPdisplay 41
8.2Dailymaintanance 44
9Appendix 45
9.1Contact 45
9.2Technicaldata 45
9.3QualityAssurance 49
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1.2 inverter
The warning signs and descriptions on Inverter are shown in the table below: Danger of electric shock!
Only the intact and closed box shell can protect the safety of people and
property. Do not open the cover of the inverter when the inverter is working or
powered on, otherwise Stealth Energy will not be held responsible.
Danger of damage to the inverter unit or personal injury!
When Inverter is working, it is forbidden to plug or unplug the PV connector, AC
connector and Bat connector.
All safety signs, warning labels and nameplates on the Inverter must be clearly
visible and cannot be removed or covered.
DANGER
WARNING
Danger of burns!
When the inverter is running, only touch the LED indicator and the DC switch. It
is strictly forbidden to touch the hot parts of the device (such as radiator, etc.)
during operation.
Country selection and protection parameters must be set by professional
technicians according to local power grid standards. The wrong country setting
may affect the normal operation of the inverter, causing the Inverter to be
inconsistent with the country's certication.
Touching printed circuit boards or other static-sensitive components may cause
damage to the device.
• Avoid unnecessary circuit board contact.
• Comply with electrostatic protection regulations and wear anti-static
wristbands.
！CAUTION
NOTICE
1.3 Skills requirements for professional and technical personnel
All Installation operations must and only be performed by professional
technicians. Professional technicians must:
• After special training;
• Read this manual completely and master the operation-related safety matters;
• Familiar with local standards and relevant safety regulations for electrical
systems.
Pay attention to danger, do not operate with electricity!
After the inverter unit is disconnected from all external power
sources, wait at least 5 minutes before touching live devices.
The surface is hot, be careful of burns! To avoid burns, do not
touch the surface of the machine while it is running.
High voltage danger!
Installation and operation should only be performed by
qualied professionals.
Please read the manual before performing any operation on the
interver.
The inverter can not be disposed together with the household
waste. Disposal information can be found in the enclosed
documentation.
CE mark.
The inverter complies with the requirements of the
applicable CE guidelines.
RCM remark.
TUV certied.
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Ru n
Co m
R_ P
__
FN
Set
L1
L2
L3
N
PE
EPS
LOAD
2 Product description
2.1Grid-connected PV energy storage system
ST-INV-T10.0 is three-phase transformerless string photovoltaic energy storage
inverters, which are an important part of photovoltaic power generation systems.
The inverter converts the DC power generated by the photovoltaic panels into AC
power that meets the grid requirements to supply the load, and the rest charges
the battery and feeds it into the grid.
The inverter is only suitable for the energy storage grid-connected power
generation system described in this article.
Since the inverter is a transformerless type, it is required that the positive and
negative poles of the PV string cannot be grounded, otherwise the inverter will
not operate normally.
The battery system case needs to be grounded.
WARNING
The typical application scenarios of inverter are shown in the following gure.
A
C
E
F
G
Fig 2-1 Application of integrated machine in photovoltaic power generation
system
For TT-type grids, the neutral-to-ground voltage must be less than 30V.
Do not connect local loads, such as household appliances, lighting, and motor
loads, between the inverter and the AC circuit breaker.
NOTICE
2.2 Poduct introduction
2.2.1 Model description
For example, ）：
ST - INV – T 10
10: Power class code
T: Three phase
INV:Pv grid-connected inverter code
ST: Stealth
2-1 Power description
DCBreaker
≥ 40A*1
ACBreaker
On-Gridload
ToSmartMeter
ToBatteryCable
PE
1
2
3
5
4
Model 1 2 34 5
ST-INV-T10.0
40A/600V DC
Breaker 50A/230V AC Breaker 32A/230V AC Breaker
Depends on
household
loads
ST-INV-T8.0
ST-INV-T6.0
ST-INV-T5.0
1.For batteries with attached breaker, the external DC breaker is not necessary.
2.Direction of the CT cannot be connected in reverse, please follow House
(K) → Grid (L) direction to do the connection.
B
D
2.2.2 Apperance
The following illustrations are for reference only, please refer to the actual objects.
No. Item Description
A PV MonocryStealthine silicon, polycryStealthine silicon, thin-
lm batteries that do not need to be grounded.
B Inverter
CMetering device Standard metering tool for inverter output energy.
DGrid Grounding type: TT, TN.
EHousehold Loads Household appliances that consume electrical energy.
FImportant Loads Important Loads that cannot be suddenly cut o.
G Battery system Battery and BMS system components.
Model Rated ouput(VA) Rated grid voltage(Va.c.)
ST-INV-T10.0 10000
400/230;380/220(Three phase)
ST-INV-T8.0 8000
ST-INV-T6.0 6000
ST-INV-T5.0 5000
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2.2.3 Dimensions and weight
Figure 2-3 inverter size marking (unit：mm)
2.2.4 LED indicator light
As a human-machine interface, LED indicators are located on the front of the
Inverter. By observing the ashing color and speed of the indicator light, the user
can obtain the current working status of the inverter. Please refer to Table 6-1 for
the description of indicator status.
Figure 2-4 LED indicator light
2.3 Function description
The functions of the fusioncube can be summarized as follows：
• Inverter function
The inverter converts direct current to alternating current consistent with the
requirements of the Installed regional grid and feeds it into the grid.
• Data storage
The Inverter stores system information, such as running information and fault
records.
• Parameter conguration
Inverter provides a variety of parameter congurations to meet various needs or
to adjust its operating performance to the best. Users can view the information
of Inverter through the mobile app. For more professional configuration, please
contact Stealth after-sales.
• Communication interface
It can be connected to the WiFi communication data acquisition module to realize
the communication function and connect the monitoring equipment with the
entire photovoltaic energy storage system
• Protection function
Inverter has protection functions such as short-circuit protection, insulation
resistance grounding monitoring, residual current protection, anti-islanding
protection, and DC overvoltage/overcurrent protection.
Figure 2-2 Apperance of
W
H
D
Model Width W (mm) Height H (mm) Depth D (mm) Net weight(kg)
ST-INV-T10.0
454 614 197 25
ST-INV-T8.0
ST-INV-T6.0
ST-INV-T5.0
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OperationModeIntroduction
NOTICE
The above introduction describes the general working of a photovoltaic
system. The operation mode can be adjusted according to the system layout
on the Stealth Cloud App. The following are the general operating modes of
photovoltaic energy storage systems.
Depending on your configuration and layout conditions, PV energy storage
systems typically have the following modes of operation:
MODE_ Ⅰ SelfUse
Theself-usemodeissuitableforareaswithlowfeed-in
subsidiesandhighelectricityprices.
①WhenthepowerofPVissucient
ActiveChargingorDischargetimeperiod:PVwillpowerthe
loadsrstly,andsurpluspowerwillchargetothebattery.
Ifthebatteryisfullycharged,thensellthesurpluspowerto
thegrid;
(PV ＞ Load,PV→ Load → Battery→Grid)
②WhenthepowerofPVisinsucient
ActiveChargingtimeperiod:PVwillpowertheloadsfirstly
,theremainingpowerwillbetakenfromthegrid,thebattery
willnotdischargeatthistime.
(PV ＜ Load,PV+Grid→Load)
ActiveDischargetimeperiod:PV+BATwillpowertheloads
together.Ifthepowerisstillnotenough,theremaining
powerwillbetakenfromthegrid.
(PV ＜ Load,PV+Battery+Grid→Load)
MODE_ Ⅱ Feed-in priority
TheFeed-inprioritymodeissuitableforareaswithhigh
feed-insubsidies,buthasfeed-inpowerlimitation.
① WhenthepowerofPVissucient
ActiveChargingtimeperiod:First,PVsupplypowertothe
load,thenchargethebatterytothesetcapacity,andthen
sellthepowertothegrid.Ifthelocalgridcompanylimits
thegrid-connectedpoweroftheinverter,theexcessenergy
continuestochargethebattery.
(PV ＞ Load,PV→Load→Battery →Grid→Battery)
ActiveDischargetimeperiod:PVwillpowertheloadsrstly,
andsurpluspowerwillfeed-intothegrid.
(PV ＞ Load,PV→Load→Grid)
② WhenthepowerofPVisinsucient
ActiveChargingtimeperiod:PVwillpowertheloadsrstly,
theremainingpowerwillbetakenfromthegrid.Thebattery
willnotdischarge.
(PV ＜ Load,PV+Grid→Load)
Dischargetimeperiod:PV+BATwillpowertheloadstogether.
Ifthepowerisstillnotenough,theremainingpowerwillbe
takenfromthegrid.
(PV ＜ Load,PV+Battery+Grid→Load)
③ WithoutPVpower
ActiveChargingtimeperiod:Thegridwillpowerthehome
loadsandalsochargethebattery;
(PV=0,Grid→Load+Battery)
ActiveDischargetimeperiod:Thebatterywillpowerthe
homeloadsfirstly.Ifthebatterypowerisnotenough,the
remainingpowerwillbetakenfromthegrid.Theinverterwill
enterintothestandbystate.
(PV=0,Battery+Grid→Load)
BatteryminSOCcanbeset:10%-100%
ChargebatterytominSOCcanbeset:10%-100%
STEALTH ST-INV-T10.0, series, also known as hybrid or bidirectional solar inverters,
is suitable for solar systems with PV, battery, load and grid systems for energy
management. The energy generated by the photovoltaic system.
The power is first used to provide the load, the excess power can be used to
charge the battery, and the remaining power can be used for grid connection.
When the PV power is not sucient to meet the requirements, the battery should
be discharged to support the load consumption. If both photovoltaic power and
battery power are insucient, the system will use grid power to support the load.
2.4 Working mode
1
2
3
1
2
③WithoutPVpower
ActiveChargingtimeperiod:Thegridsuppliestheloads
andalsocanchargethebattery;
(PV=0,Grid→Load+Battery)
ActiveDischargetimeperiod:Thebatterywillpowerthe
homeloadsörstly.Ifthebatterypowerisnotenough,the
remainingpowerwillbetakenfromthegrid.Theinverter
willenterintothestandbystate.
(PV=0,Battery+Grid→Load)
BatteryminSOCcanbeset:10%-100%
ChargebatterytominSOCcanbeset:10%-100%
1
23
1
2
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MODE_ ⅣEPS(O-grid)
TheEPS(O-grid)isusedwhenthepowergridiso.
SystemwillprovidesemergencypowerthroughPVand
batteriestosupplypowertothehouseholdloads.
(Batterymustbeinstalledforthismode)
① WhenthepowerofPVissucent
PVwillpowertheloadsrstly,andsurpluspowerwillcharge
tothebattery.
(PV ＞ Load,PV→Load→Battery)
② WhenthepowerofPVisinsucient
Theremainingpowerwillbetakenfromthebattery.
(PV ＜ Load,PV→Load)
③WithoutPVpower
Thebatterywillpowertheemergencyloadsuntilthebattery
reachedtheminSOC,thentheinverterwillenterintotheidle
mode.
(PV=0,Battery→Load)
EPS(o-grid)SOC-minconditionisadjustablewithin
therangeof10%-25%;
MODE_ Ⅲ Backup mode
Theback-upmodeissuitableforareaswithfrequentpower
outages.
Sameworkinglogicwith“Self-use”mode.Thismodewill
maintainthebatterycapacityatarelativelyhighlevel.(Users'
setting)toensurethattheemergencyloadscanbeusedwhen
thegridiso.Customersnoneedtoworryaboutthebattery
capacity.
BatteryminSOCcanbeset:10%-100%.
ChargebatterytominSOCcanbeset:10%-100%.
12
3
1
2
1
3
2
Notice: in the case of grid connection, all working modes work
normally when the battery SOC >10%. When the battery charge
rate is below 10%, the PV or Grid will rst charge the
battery SOC15%, and then return to the working mode selected
by the user.
3 Unpacking and storage
3.1 Unpacking inspection
Inverter has been completely tested and strictly inspected before leaving the
factory, but damage may still occur during transportation. Please conduct a
detailed inspection before signing for the product.
• Check the packing box for damage.
• According to the packing list, check whether the goods are complete and in
accordance with the order.
• Unpack and check whether the internal equipment is in good condition.
If you find any damage, please contact the shipping company or the after-sales
service of Stealth directly, and provide photos of the damage, so as to provide the
fastest and best service.
Do not discard the original packaging of Inverter. It is best to store Inverter in the
original box after it is out of service and removed.
3.2 Identication of inverter
The nameplate of inverter is attached to the side of the body.
Figure 3-2 inverter nameplate
Grid-Connected Photovoltaic Inverter
Model: ST-INV-T10.0
PV
Input
Max. input power
13000W
Absolute max. voltage
1000 Vd.c.
MPPT voltage range
200~950 Vd.c.
Max. input current
12.5/12.5Ad.c.
Max. short circuit current
15.2/15.2Ad.c.
Battery
Battery type
Lithium
Battery voltage range
180~600Vd.c.
Max. charge/discharge current
25 A.
AC
Input
Nominal voltage 400V/380Va.c. 3L/N/PE
Nominal frequency
50/60 Hz
Rated input current
22.7Aa.c.
Rated apparent power
15000VA
AC
Output
Nominal voltage
400V/380Va.c. 3L/N/PE
Nominal frequency
50/60Hz
Rated output current
16.5Aa.c.
Rated apparent power
10000VA
Power factor
0.8leading~0.8lagging
EPS
Nominal voltage
.
400V/380Va.c..
Nominal frequency
50/60Hz
Rated output current
16.5Aa.c.
Rated apparent power
10000VA
Others
Ingress protection IP65
Ambient temperature range
-25~60℃
Overvoltage category
DC II AC III
Protective class
I
Inverter topology
Non-isolated
*IEC62109: Rated Current=Maximum Continuous Current
Rated Power=Maximum Continuous Power
DRM0
DRM0
DRM0
DRM0
DRM0
DRM0
DRM0
DRM0
DRM0
S/N
Suzhou Stealth Energy Technology Co., Ltd Made in China
Icon Description
Table 3-1 Description of nameplate
Conform to TÜV certicate
Conform to CE certicate
Refer to the relevant instructions
Do not dispose of inverter with household
waste
Pay attention to danger, do not
operate with electricity!
After the inverter unit is disconnected
from all external power sources, wait
at least 5 minutes before touching live
devices.
The surface is hot, be careful of burns! To
avoid burns, do not touch the surface of
the machine while it is running.
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3.3 Delivery list
3-3 Delivery list
a)Unless otherwise specified, inverter diagrams in this document use as an
example.
b)Documentation includes quick user manual, certificate of conformity, packing
list and product test report.
c)The WiFi communication module may be standard or optional, subject to the
actual delivery.
3.4 Storage of inverter
If the inverter is not immediately put into operation, the inverter needs to be
stored in specic environmental conditions:
• Repack in the original box, keep the desiccant.
• Storage temperature range -25 ℃ ~60 ℃ , relative humidity range 0~100%, no
condensation.
• The maximum number of stacked layers of multiple inverter machines does not
exceed 8 layers.
• The packing box cannot be tilted or inverted.
4 Mechanical Installation
4.1 Installtion Precautions
Before Installing the inverter, make sure the inverter has no electrical
connections. Before drilling, make sure to avoid the water and electricity wiring
in the wall to avoid danger!
Improper handling may result in personal injury! The instructions in the manual
must be followed when handling and placing the equipment. Poor ventilation in
the Installation environment will aect system performance!
• It is necessary to ensure good ventilation during the operation of the
equipment.
• The device must be kept upright and the heat sink uncovered to ensure
adequate cooling inside the device.
4.2 Choose the Installation site
The inverter is IP65 rated and can be used for indoor Installation.
Choosing the best Installation location for an integrated machine plays a very
important role in its safe operation, life assurance, and performance assurance.
• The Installation wall must have the ability to support at least 4 times the weight
of the inverter.
• The Installation location should be easy for electrical connection, operation
and maintenance.
• Do not Install inverter in the living area. The operation of inverter generates
some noise, which may aect daily life.
• Do not Install inverter where children can reach it.
• The Installation environment must meet the following conditions:
+60°C -25°C 100%
Max ambient temperature： Min ambient temperature： Max relative humidity:
！CAUTION
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• The Installation wall must have re resistance, and there must be no ammable
substances or ammable gas in the Installation space.
• The installation height should facilitate the observation of LED indicators.
Vertical installation for better heat dissipation
• Do not install tilted, horizontally or upside down.
Wall material ammability Flammable materials or gases are
found near the Installation point
Forward lean Backward lean at Inverted
NOTICE
Inverter cannot be Installed horizontally, otherwise the equipment will be
damaged.
• Avoid direct sunlight, rain and snow, and it is best to choose a sheltered
installation site, which can prolong the service life of the equipment.
• Reserve enough space during installation to facilitate air convection around
inverter and subsequent maintenance.
• When multiple rows are installed, the distance between two adjacent rows is
required to be at least 400mm.
It is very important to ensure smooth ventilation and heat dissipation of inverter.
Please install the inverter in a ventilated environment. Do not install the inverter
in a closed box, otherwise it will Aect the power generation of inverter.
NOTICE
400 mm 400 mm
400 mm400 mm
400mm 400mm
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4.3 Installation tools and parts
Installation tools include, but are not limited to ,the tools recommended below.
When necessary, other aids can be used on site.
Type Tools
General
Tape Pen Tape ruler Knive
meter（≥ 1100V） Protective suit Anti-static
bracelets
Protective gloves
Masks Earplug Eye protector Insulated
shoes
Hoovers Spirit level
880.0
Installation
Hammer
：φ10
Rubber hammer Electric screwdrivers Cross screwdriver
Wire stripper hydraulic clamp wire crimpers2.5-
6mm²
MC4 Terminal wrench
wire cutters Crystal head
crimping pliers
4.4 Installation of inverter
After transporting the inverter to the installation site, install the hanging plate
on the wall with the expansion bolt assembly, and then hang the inverter on the
hanging plate.
The expansion bolt assembly is shown in the gure below.
Self-tapping screws M6 Expansion tube Flat Gasket Locking spacer
Installation steps
1.Place the hanging board
horizontally on the wall, and mark
the position of drilling holes on the
wall with a hole.
Tip: When installing on a post,
please use the b hole on the vertical
direction of the hanging plate.
ab
b
b
a
a
a
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2.Drill holes (about 70mm in depth) and install the hanging plate.
3.Lift the inverter and hang the back mounting ear holes on the mounting plate.
Use 2 M5x12 screws to fasten the inverter to the mounting plate with a torque of
1.5N·m.
5 Electrical connection
Personal protective equipment must be worn when working on electrical wiring.
There may be high voltage in the unit!
Pay attention to safety before making electrical connections. Exposure of PV
strings to sunlight will generate dangerous voltages.
Make sure all cables are de-energized before making electrical connections, and
do not close the AC circuit breaker until electrical connections are complete.
Any improper operation during wiring may result in equipment damage or
personal injury. Wiring must be done only by professional technicians. Cables
used in photovoltaic power generation systems must be firmly connected,
undamaged, well insulated, and of appropriate size.
The relevant rules of the local power grid and the relevant safety instructions for
PV strings and battery systems must be followed. All electrical Installations must
comply with the electrical standards of the country in which they are Installed.
Connect the inverter to the grid only with permission from the local power
department.
NOTICE
WARNING
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5.1 Terminal introduction
The external wiring terminals are located on the side of the inverter, as shown
in the figure below. The picture is for reference only, please refer to the actual
product!
No. Terminal Description
1 PVterminal ForconnectingtoPVstrings,andhave2pairsofPV
terminals.
2 BATterminal Usedtoconnecttotheenergystoragebattery.
3 BMSterminal Forconnectingtothebatterymanagementsystem.
4 METERterminal UsedtoaccesstheMeter.
5 DREDterminal TheDemandResponseMode(DRM)functionenables
remoteoperationoftheinvertertodisconnectfromthegrid.
6 TYPE-Cterminal UsedtoconnecttheWiFimodule.
7 ACterminal Connecttothegrid.
8 EPSterminal Connectedtocriticalloads.
9 PVswitch-
disconnector
ControlPVonando,Model:PEDS150(R)-HM32-4
5.2 Overview of electrical connection
The external electrical connections of Inverter include: grid connection,
photovoltaic string connection, battery parallel connection, , WiFi module
connection and RJ45 terminal connection.
When multiple inverter machines are connected to the grid in parallel, the number
of parallel connections on each phase and the grid impedance requirements are
as follows:
For Australia and New Zealand the PV SWITCH is not integrated.
The external isolation devices for PV array ports shall include the requirement of
an additional external break switching device that conforms to the requirements
AS/NZS 4777.1
NOTICE
Model No.of three-phase
parallel machines
Power grid impedance
requirements Remarks
ST-INV-T10.0
≤ 30 ＜ 49mΩ
If the number of
parallel connections
exceeds 8,
please contact stoll
technical sta for
evaluation.
ST-INV-T8.0
ST-INV-T6.0
ST-INV-T5.0
PV1+ PV2+ BAT+
PV1- PV2- BAT-
BMS DRM
METER
Grid
BACK-UP
EPS
L1
L2
L3
N
PE
BATTERY
BMS
METER
DRM
AE
D
C
H
+
WIFI
G
R
F
B
Back-up Grid
Wifi
BMS DRM
METERP
PV1+ PV2+
PV1-/ + PV2-
1 2 4 6 7 8
9
3 5
User Manual User Manual
22 23
5.3 Ground connection
In the photovoltaic power generation system, all non-current-carrying metal parts
and the casing of the equipment should be grounded (such as the bracket of the
photovoltaic module, the inverter casing, etc.). adopts internal grounding, and
also conducts secondary grounding externally.
5.4 Grid and back-up connection
Inverter is connected to the power grid through L (live wire), N (neutral wire) and
PE (ground wire). via Back-up_L, Back-up_N and Back-up_GND to connect with
important loads.
5.4.1 AC side requirements
AC circuit breaker
In order to ensure that Inverter can be safely disconnected under load, an
independent two-pole AC circuit breaker must be configured for each inverter
machine as a protection device.
The recommended AC circuit breaker specications for Inverter are shown in the
table below.
Leakage current protector
There is an integrated integrated leakage current monitoring unit inside Inverter.
When the integrated machine detects a leakage current greater than the allowable
value, it will quickly disconnect from the grid.
If an RCD (Leakage Current Device) or a leakage current switch is installed
externally, its operating current must be ≥ 30mA.
AC Cable Requirements
The recommended specications of the AC cables are shown in the table below.
Multiple inverters cannot share one AC circuit breaker.
No load can be connected between the inverter and the AC circuit breaker.
NOTICE
No. Item Remarks
A PV strings ST-INV-T10.0 and have 2 pairs of PV terminals.
BCommunication module Type-C interface and WIFI module.
C AC circuit breaker Electrical connection protection device (not
included in the delivery list).
DGrid Rated voltage is 230Vac.
EThe external energy
storage battery system
includes batteries and BMS. Electricity meters are
used for energy management.
F Electricity meter Used for energy management
GDRM The demand of Australian grid
HEPS EPS connects important loads
Model Conductor cross-sectional
area (mm2)Cable outerdiameter (mm)
Range Recommended
value Range Recommended
value
ST-INV-T10.0
6~8 85.5~8.0 6
ST-INV-T8.0
ST-INV-T6.0
ST-INV-T5.0
Model Recommended specication
ST-INV-T10.0
50A
ST-INV-T8.0
ST-INV-T6.0
ST-INV-T5.0
User Manual User Manual
24 25
5.4.2 Assembling the cable to the AC&Back-up connector
Assemble the AC cable to the AC&Back-up connector, which is a 6p*2 fence
terminal.
Please refer to the local cable color standard, choose core wires of dierent
colors, for L wire (live wire),N wire (zero line), PE line (ground line) to
distinguish.
Step 1:Strip the cable jacket and
core wire insulation.
Step 2 :Insert the stripped wire into the connector with a hex screwdriver.
In the order 1 → L1,2 → L2,3 → L3,N → N,G → G.
Step 3 :Connecting the grid and load
to the corresponding position
Pay attention to the wiring layout of the AC terminals. It is forbidden to connect
the phase wires to the PE terminals. Otherwise, the inverter may not operate
normally, and the resulting loss has nothing to do with Stealth.
NOTICE
The following requirements must be met when connecting PV strings; otherwise,
the inverter may be irreversibly damaged, and the resulting damage will not be
covered by the warranty.
• Ensure that the voltage of each PV string does not exceed 550V under any
circumstances.
• Ensure that the maximum short-circuit current on the PV side is within the
allowable range of the inverter.
• Ensure that the PV strings are well insulated to the ground under any
circumstances.
NOTICE
L1
40mm
8-12mm
L2
L3
N
G
User Manual User Manual
26 27
5.5 PV series connection
5.5.1 PV Input Conguration
ST-INV-T10.0 and each input has a pair of PV terminals. Two PV inputs, each with
independent MPPT, can be congured in independent mode or parallel mode.
• Standalone mode
In the independent mode, the two PV string inputs operate independently, and
the two strings can be dierent from each other, including: dierent panel types,
different numbers of panels forming a string, different inclination angles, and
dierent azimuth angles.
As shown in the gure below, the inclination angles of the input panels of the two
PV strings are dierent, and Inverter should select the independent mode.
Figure 5-4 standalone mode
用户手册 9 故障排除与维护
27
用户手册 5 电气连接
5.5.1
PV 输入配置
ST-AIO-S5.0有PV1和PV2两路输入，每一路输入各有一对 PV 端子。两路PV输入，每路都
有独立的MPPT，可配置为独立模式或并联模式。
独立模式
在独立模式下，两路光伏组串输入独立运行，两路组串可以互不相同，包括：不同的
电池板类型、构成组串的电池板数不同、不同的倾角、不同的方位角。
如下图所示，两路光伏组串输入电池板的倾角不同，一体机应选择独立模式。
图5-4 独立模式
型号 PV 输入总
功率限值 每路输入开路电压限值
(DC1/DC2)
每路输入短路电流
限值(DC1/DC2)
ST-AIO-S5.0 6000W 550V/550V 13.8A/13.8A
逆变器内部
MPPT1
MPPT2
PV1 输入
PV2
输入
Inside inverter
input
input
L
N
L
N
PE
BMS
Back-up
Loads
Distribution box
RCD
RCD
Smart
Meter
Don'tconnectthisterminalfor
AustralianandNew Zealand
gridsystem!!!
TheGroundingscrewhole at
thelowerrightcorner
Back-up
Battery
Solar
Array
On-Grid
Grid
NormalLoads
L
L
L
N
N
N
PE
PE
PE
E-BARE-BAR
N-BAR
RS485Meter
E-N
Link
CT
L
N
L
N
PE
Back-up
Loads
Distribution box
RCD
TheGroundingscrewhole at
thelowerrightcorner
Battery
Solar
Array
Back-up
On-Grid
Smart
Meter
RCD
Grid
L
L
L
N
N
N
PE
PE
PE
NormalLoads
RS485Meter
E-BAR
CT
E-BAR
For Australia safety country, the neutral cable of On-Grid side and Back-Up side
must be connected together, otherwise Back-Up function will not work.
The back-up PE line and rack earth must be grounded properly and eectively.
Otherwise the back-up function may be abnormal when the grid fail.
NOTICE
NOTICE
This diagram is an example
for Australia，South Africa
and New Zealand grid system.
This diagram is an example for
grid system without special
requirement on electiical
wiring connection
STEALTH Series
Hybrid Inverter
STEALTH Series
Hybrid Inverter
Model PV input total
power limit
Each input open circuit
voltage limit (DC1/DC2)
Short-circuit current
limit per input (DC1/DC2)
ST-INV-T10.0 15000W 850V/850V 21.2A/21.2A
User Manual User Manual
28 29
• Parallel mode
In parallel configuration mode, all PV strings connected to Inverter must have
exactly the same characteristics, including: the same model, the same number of
panels, the same inclination, and the same azimuth.
In order to avoid the unbalance of the two input powers,
or even the input load limit, the two PV input cables are
required to be of the same type.
PV1 inout
PV2 input
Inside
inverter
5-6 Parallel Mode
5.5.2 Assembling the cable to the PV connector
Assemble the DC cable to the in-line PV connector that mates with the PV
terminals on the side of the unit. The specications of the DC cables are shown in
the following table.
The DC cable must be multi-core.
To ensure the IP65 degree of protection of the inverter unit, only use the supplied
connectors or products with the same degree of protection.
Step 1 Strip all DC cable insulation
about 7mm.
Step 2 Use crimping pliers to bundle
the cable ends on the terminal.
Step 3 Pass the cable through the
cable gland and insert the insulating
sleeve until it snaps shut. Pull
lightly on the cable to make sure it
is securely connected. Tighten the
sealing sleeve and insulating sleeve
with a force of 2.5~3N·m.
Step 4 Check that the polarities of
the cables connecting the PV strings
are correct.
用户手册 9 故障排除与维护
29
5 电气连接 用户手册
5.5.2
装配线缆至 PV 连接器
将直流线缆装配到直插式 PV 连接器，该连接器与一体机侧面的 PV 端子相匹
配。 直流线缆的规格要求如下表所示。
横截面积范围 线缆外径 最大耐受电压 最大耐受电流
2.5mm
2
~4mm
2
2mm~4mm 600V 25A
步骤1 剥去所有直流线缆绝缘层约 7mm。
步骤
2
利用压线钳将电缆线端集束在接线端
子。
步骤
3
将电缆穿过电缆密封套，插入绝缘套
筒直到其扣紧。轻拉线缆确保已连
接紧固。使用 2.5~3N·m 的力将密封
套和绝缘套筒紧固。
步骤4
检查确认光伏组串连接线缆的极性正确。
直流线缆必须是多芯线。
为确保一体机 IP54 的防护等级，只能使用供货提供的连接器或具备相同防护
等级的产品。
如果 PV 输入极性接反，逆变器将不能正常运行。
如果 PV 连接器装配不到位，可能导致拉弧或者连接器过热，由此造成的损失
将不在质保范围内。
If the PV input polarity is reversed, the inverter will not operate normally.
If the PV connector is not properly assembled, it may cause arcing or overheating
in the connector, which will not be covered by the warranty.
NOTICE
NOTICE
Model PV input total
power limit
Open circuit
voltage limit
Short-circuit current
limit per input
ST-INV-T10.0 15000W
850V/850V 21.2A/21.2A
ST-INV-T8.0 12000W
ST-INV-T6.0 9500W
ST-INV-T5.0 7500W
Cross-sectional
area range Cable O.D. Max. withstand voltage Max. withstand current
4mm2~6mm22mm~4mm 600V 25A
User Manual User Manual
30 31
5.5.3 Installing the PV Connector
Installation steps:
Step 1 :Manually turn the DC switch
on the top left to "OFF".
OFF
ON
Step 2: Check whether the polarity
of the connecting cables of the
PV strings is correct, and ensure
that the open-circuit voltage does
not exceed the upper limit of the
inverter input of 550V under any
circumstances.
9 故障排除与维护 用户手册
30
用户手册 5 电气连接
5.5.3
安装 PV 连接器
安装步骤：
步骤1 将位于左下侧的直流开关手动
旋至
“
OFF
”
。
步骤2 检查光伏组串的连接电缆极性是否正确，并确保任何情况下的开路电压不
超过逆变器输入上限值 550V。
888.8
+
将PV 连接器连接到逆变器之前，检查电池板的正、负极性，确认无误后才
可将 PV 连接器插入相应的 PV 端子。
Before connecting the PV connector to the inverter, check the positive and
negative polarities of the solar panel, and then insert the PV connector into the
corresponding PV terminal after conrmation.
Step 3 Insert the PV connector into the corresponding PV terminal until you hear a
"click".
NOTICE
5.6 Battery cable connection
Since the battery is inammable and explosive, the following requirements must
be met when connecting the battery.
• Make sure that the battery box is free from bulging, peculiar smell and other
special conditions.
• Ensure that the battery voltage does not exceed the upper and lower voltage
limits that the battery can withstand under any circumstances.
• Ensure that the battery box is kept away from re sources.
NOTICE
5.6.1 Requirements on the battery side
DC circiut breaker
To ensure that the inverter can be safely disconnected when it is loaded, an
independent bipolar DC circuit breaker must be configured for each inverter as
a protection device. If the battery box with the inverter has a circuit breaker, no
additional conguration is required.
The following table lists recommended DC circuit breaker specifications for
dierent inverters.
Table 5-1 recommended DC circuit breaker specications
Model Recommended specications
ST-INV-T10.0
32A
ST-INV-T8.0
ST-INV-T6.0
ST-INV-T5.0
+
+
-
-
User Manual User Manual
32 33
5.6.2 Assembling the cable to the Bat connector
The connection of the battery is the same as that of the PV, but a different
connector is used to distinguish it from the PV connector. Assemble the DC cables
to the in-line Bat connectors that mate with the Bat terminals on the bottom of the
inverter.
The specications of the battery cable are shown in the table below.
Step 1: Strip all DC cable insulation about
7mm, then insert the cable end into the
orange part of the terminal in the picture.
Step 2: Depress the spring until you hear
a "click". Pull lightly on the cable to make
sure it is securely connected.
Step 3: Use a force of 2.5~3N·m to fasten
the sealing sleeve and insulating sleeve.
Step 4: Check that the polarity of the
battery connection cable is correct.
9 故障排除与维护 用户手册
32
5 电气连接 用户手册
5.6.2
装配线缆至 Bat 连接器
电池的连接同PV一样，只是采用不同的连接器来和PV连接器加以区分。将直流线缆装配
到直插式Bat 连接器，该连接器与逆变器底部的 Bat 端子相匹配。
电池线缆的规格要求如下表所示。
横截面积范围 线缆外径 最大耐受电压 最大耐受电流
4mm
2
~6mm
2
5.5mm~8.0mm
600V 25A
步骤1
剥去所有直流线缆绝缘层约 7mm，后
将电缆线端插入图中端子橙色部分。
步骤2
按下弹簧，直到听到“喀哒”声。
轻拉
线缆确保已连接紧固。
步骤3
使用 2.5~3N·m 的力将密封套和绝缘套
筒紧固。
步骤4 检查确认电池连接线缆的极性正确。
如果
Bat
输入极性接反，逆变器将不能正常运行。
如果 Bat 连接器装配不到位，可能导致拉弧或者连接器过热，由此造成的损
失将不在质保范围内。
If the Bat input polarity is reversed, the inverter will not operate properly. If the
Bat connector is not properly assembled, it may cause arcing or overheating of
the connector, which will not be covered by the warranty.
NOTICE
5.6.3 Installing the Bat Connector
Step 1: Disconnect the DC circuit breaker.
Step 2: Check whether the polarity of the connecting cable of the battery is correct,
and make sure that the open circuit voltage does not exceed the upper limit of the
inverter input 400V under any circumstances.
用户手册 9 故障排除与维护
33
5 电气连接 用户手册
5.6.3
安装 Bat 连接器
步骤1将直流断路器断开。
步骤2 检查电池的连接电缆极性是否正确，并确保任何情况下的开路电压不超
过逆变器输入上限值 400V。
步骤
3
将
Bat
连接器插入对应的
Bat
端子，直到听见
“
咔嗒
“
声。
888.8
+
将Bat 连接器连接到逆变器之前，检查电池的正、负极性，确认无误后才
可将 Bat 连接器插入相应的 Bat 端子。
Before connecting the Bat connector to the inverter, check the positive and
negative polarity of the battery, and then insert the Bat connector into the
corresponding Bat terminal after conrmation.
Step 3 Insert the Bat connector into the corresponding Bat terminal until you hear
a "click".
NOTICE
Cross-sectional
area range Cable O.D. Max. withstand
voltage
Max. withstand
current
4mm2~6mm25.5mm~8mm 600V 25A
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