SolaX Power X3-PRO G2 Series User manual

614.00630.02
X3-PRO G2 Series
User Manual
8 kW - 30 kW
SolaX Power Network Technology (Zhejiang) Co., Ltd.
Copyright Declaration
The copyright of this manual belongs to SolaX Power Network Technology (Zhejiang) Co., Ltd. Any
corporation or individual should not plagiarize, partially or fully copy (including software, etc.),
and no reproduction or distribution of it in any form or by any means shall be allowed. All rights
reserved. SolaX Power Network Technology (Zhejiang) Co., Ltd. reserves the right of final
interpretation.
ADD.: No. 288 Shizhu Road, Tonglu Economic Development Zone,
Tonglu City, Zhejiang Province, China.
TEL.: [phone]
E-mail: [e-mail]

Contents
1 Note on this Manual
1.1 Scope of Validity
1.2 Target Group
1.3 Symbols Used
2 Safety
2.1 Appropriate Usage
2.2 Important Safety Instructions
2.3 Explanation of Symbols
2.4 EC Directives
3 Introduction
3.1 Basic Features
3.2 Terminals of Inverter
3.3 Dimension
4 Technical Data
4.1 DC Input
4.2 AC Output
4.3 Efficiency, Safety and Protection
4.4 General Data
5 Installation
5.1 Check for Transport Damage
5.2 Packing List
5.3 Installation Precaution
5.4 Installation Steps
5.5 Connection of the Inverter
5.6 Run the Inverter
6 Operation Method
6.1 Control Panel
6.2 LCD Function & Operation
Contents
01
03
03
03
03
04
04
06
09
10
11
11
11
12
13
13
14
15
16
17
17
17
18
19
24
38
39
39
40

1.1 Scope of Validity
This manual is an integral part of X3-PRO G2 Series. It describes the
assembly, installation, commissioning, maintenance and failure of the
product. Please read it carefully before operating.
Note: “X3” means three phases. ”PRO” means product series name. “8K”
means rated output power is 8 kW. ”G2” means this product is the second
generation machine of the series. “2D” means two strings of MPPT and with
DC switch. “3D” means three strings of MPPT and with DC switch.
Keep this manual at where it is accessible all the time.
1.2 Target Group
This manual is for qualified electricians. The tasks described in this manual
only can be performed by qualified electricians.
1.3 Symbols Used
The following types of safety instructions and general information appear in
this document as described below:
1 Notes on this Manual
7 Troubleshooting
7.1 Trouble Shooting
7.2 Routine Maintenance
8 Decommissioning
8.1 Dismantling the Inverter
8.2 Packaging
8.3 Storage and Transportation
8.4 Waste Disposal
Notes on this ManualContents
03
02
54
54
57
58
58
58
58
58
59
9 Disclaimer
* Warranty Registration Form
X3-PRO-20K-G2(2D)
X3-PRO-25K-G2(3D)
X3-PRO-17K-G2(3D) X3-PRO-20K-G2(3D)
X3-PRO-30K-G2(3D)
X3-PRO-8K-G2(2D) X3-PRO-10K-G2(2D) X3-PRO-12K-G2(2D)
X3-PRO-15K-G2(2D) X3-PRO-17K-G2(2D)
X3-PRO-15K-G2(3D)
Danger!
“Danger” indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
Warning!
“Warning” indicates a hazardous situation which, if not
avoided, could result in death or serious injury.
Caution!
“Caution” indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
Note!
“Note” provides tips that are valuable for the optimal operation
of your product.

2 Safety
2.1 Appropriate Usage
The X3-PRO G2 Series are PV inverters which can convert DC power from PV
generators to AC power and feed it into the public grid.
Surge protection devices (SPDs) for PV installation
Over-voltage protection with surge arresters should be provided
when the PV power system is installed.
The grid connected inverter is fitted with SPDs in both PV
input side and MAINS side.
Induced surges are the more likely cause of lightning damage in majority of installations,
especially in rural areas where electricity is usually provided by long overhead lines.
Surges may be induced on both the PV array conductors or the AC cables
leading to the building.
Specialists in lightning protection should be consulted in the actual application.
Using appropriate external lightning protection, the effect of a direct lightning
strike into a building can be mitigated in a controlled way, and the lightning
current can be discharged into the ground.
Installation of SPDs to protect the inverter against mechanical damage and
excessive stress include a surge arrester in case of a building with external
lightning protection system (LPS) when separation distance is kept.
To protect the DC system, Surge Protection Device(SPD type2) should be fitted
at the inverter end of the DC cabling and at the array located between the
inverter and the PV generator, if the voltage protection level (VP) of the surge
arresters is greater than 1100V, an additional SPD type 3 required surge protection
for electrical devices.
►
05
04
SafetySafety
Anti-Islanding Effect
►
Islanding effect is a special phenomenon that grid-connected PV
system still supplies power to the nearby grid when the grid loss
happened in the power system. It is dangerous for maintenance
personnel and the public.
X3-PRO G2 series provide Active Frequency Drift(AFD) to prevent
islanding effect.
Lightning will cause a damage either from a direct strike or from surges due to a
nearby strike.
To protect the AC system, surge protection devices (SPD type2) should be
fitted at the main incoming point of AC supply (at the consumer’s cutout),
located between the inverter and the meter/distribution system; SPD (test
impulse D1) for signal line according to EN 61632-1.
All DC cables should be installed to provide as short a run as possible, positive
and negative cables of the string or main DC supply should be bundled
together. Avoiding the creation of loops in the system. This requirement for
short runs and bundling includes any associated earth bundling conductors.
Spark gap devices are not suitable to be used in DC circuits once conducting,
they won’t stop conducting until the voltage across their terminals is typically
more than 30 volts.
Electricalgrid
Electricmeter,
bidirectional Solax
three phase meter
(optional）
Load
PVarray
DCDistribution
Box
Household
DistributionUnits
X3-PRO G2 series Inverter
ACDistribution
Box
Warning!

2.2 Important Safety Instructions
Danger!
Danger to life due to high voltages in the inverter!
All work must be carried out by qualified electrician.
The appliance is not to be used by children or persons with
reduced physical sensory or mental capabilities, or lack of
experience and knowledge, unless they have been given
supervision or instruction.
Children should be supervised to ensure that they do not play
with the appliance.
Caution!
Possible damage to health as a result of the effects of
radiation!
Do not stay closer than 20 cm to the inverter for a long time.
Note!
Grounding the PV generator.
Comply with the local requirements for grounding the PV
modules and the PV generator. SolaX recommends connecting
the generator frame and other electrically conductive surfaces
in a manner which ensures continuous conduction and
ground these in order to have optimal protection of system
and persons.
Warning!
Ensure input DC voltage ≤Max. DC voltage. Over voltage
may cause permanent damage to inverter or other losses,
which will not be included in warranty!
Warning!
Authorized service personnel must disconnect both AC and
DC power from X3-PRO G2 series before attempting any
maintenance or cleaning or working on any circuits connected
to the X3-PRO G2 series.
Prior to the application, please read this section carefully to ensure correct
and safe application. Please keep the user manual properly.
Use only attachments recommended or sold by SolaX. Otherwise may result
in a risk of fire, electric shock, or injury to person.
Make sure that existing wiring is in good condition and that wire is not
undersized.
Do not disassemble any parts of inverter which are not mentioned in
installation guide. It contains no user-serviceable parts. See Warranty for
instructions on obtaining service. Attempting to service the X3-PRO G2
Series inverter yourself may result in a risk of electric shock or fire and will
void your warranty.
Keep away from flammable, explosive materials to avoid fire disaster.
The installation place should be away from humid or corrosive substance.
Authorized service personnel must use insulated tools when installing or
working with this equipment.
PV modules shall have an IEC 61730 class A rating.
Never touch either the positive or negative pole of PV connecting device. Strictly
prohibit touching both of them at the same time.
The unit contains capacitors that remain charged to a potentially lethal voltage
after the MAINS and PV supply have been disconnected.
Hazardous voltage will present for up to 5 minutes after disconnection from
power supply.
CAUTION - RISK of electric shock from energy stored in capacitor. Never operate
on the solar inverter couplers, The MAINS cables, PV cables or the PV generator
when power is applied. After switching off the PV and Mains, always wait for 5
minutes to let the intermediate circuit capacitors discharge before you unplug
DC and MAINS couplers.
When accessing the internal circuit of solar inverter, it is very important to wait 5
minutes before operating the power circuit or demounting the electrolyte
capacitors inside the device. Do not open the device before hand since the
capacitors time to sufficiently discharge! require
Measure the voltage between terminals UDC+ and UDC- with a multi-meter
(impedance at least 1Mohm) to ensure that the device is discharged before
beginning work (35VDC) inside the device.
Safety Safety
0706
Do not operate the inverter when the device is running.
Risk of electric shock!
Caution!
Danger of burn injuries due to hot enclosure parts!
During operation, the upper lid of the enclosure and the
enclosure body may become hot.
If necessary, touch the lower temperature enclosure lid during
operation.
Warning!
Warning!

PE Connection and Leakage Current
• All inverters incorporate a certified internal Residual Current Device(RCD) in
order to protect against possible electrocution and fire hazard in case of a
malfunction in the PV array, cables or inverter. There are 2 trip thresholds for
the RCD as required for certification (IEC 62109-2:2011). The default value for
electrocution protection is 30 mA, and for slow rising current is 300 mA.
• If an external RCD is required by local regulations, check which type of RCD is
required for relevant electric code. It recommends using a type-A RCD. The
recommended RCD values is 100 mA or 300 mA unless a lower value is required
by the specific local electric codes. When required by local regulations, the use
of an RCD type B is permitted.
High leakage current!
Earth connection essential before connecting supply.
• Incorrect grounding can cause physical injury, death or equipment malfunction
and increase electromagnetic.
• Make sure that grounding conductor is adequately sized as required by safety
regulations.
• Do not connect the ground terminals of the unit in series in case of a multiple
installation. This product can cause current with a d.c. component. Where a residual
current operated protective (RCD) or monitoring (RCM) device is used for protection
in case of direct or indirect contact, only an RCD or RCM of type B is allowed
on the supply side of this product.
For United Kingdom
• The installation that connects the equipment to the supply terminals shall
comply with the requirements of BS 7671.
• Electrical installation of PV system shall comply with requirements of BS 7671
and IEC 60364-7-712.
• No protection settings can be altered.
• User shall ensure that equipment is so installed, designed and operated to
maintain at all times compliance with the requirements of ESQCR22(1)(a).
For Australia and New Zealand
• Electrical installation and maintenance shall be conducted by licensed
electrician and shall comply with Australia National Wiring Rules.
0908
2.3 Explanation of Symbols
This section gives an explanation of all the symbols shown on the inverter and
on the type label.
Symbols on the Inverter
Symbol Explanation
Operating Display.
An error has occurred, please inform your installer immediately.
Symbols on the Type Label
Safety Safety
Symbol Explanation
CE mark.
The inverter complies with the requirements of the applicable
CE guidelines.
RCM remark.
Beware of hot surface.
The inverter can become hot during operation. Avoid contact
during operation.
Danger of high voltages.
Danger to life due to high voltages in the inverter!
Danger.
Risk of electric shock!
Observe enclosed documentation.
The inverter can not be disposed together with the household waste.
Disposal information can be found in the enclosed documentation.
Do not operate this inverter until it is isolated from mains
and on-site PV generation suppliers.
Danger to life due to high voltage.
There is residual voltage in the inverter which needs 5 min to
discharge.
• Wait 5 min before you open the upper lid or the DC lid.
TUV certification.
Compliant with UKCA standards.
Compliant with UKNI standards.
RoHS certificate
The inverter complies with the requirements of Restriction of
Hazardous Substances.
Warning!

2.4 EC Directives
This chapter follows the requirements of the European low voltage directives,
which contains the safety instructions and conditions of acceptability for the
endues system, which you must follow when installing, operating and
servicing the unit. If ignored, physical injury or death may follow, or damage
may occur to the unit. Read this instructions before you work on the unit. If
you are unable to understand the dangers, warnings, cautions or instructions,
please contact an authorized service dealer before installing. Operating and
servicing the unit.
The Grid connected inverter meets the requirement stipulated in Low
Voltage Directive (LVD) 2014/35/EU and Electromagnetic Compatibility (EMC)
Directive 2014/30/EU. The unit is based on:
EN 62109-1:2010 ; EN 62109-2:2011 ; IEC 62109-1(ed.1) ; IEC62109-2(ed.1)
EN 61000-6-3:2007+A:2011 ; EN 61000-6-1:2007 ; EN 61000-6-2:2005
In case of installation in PV system, startup of the unit (i.e. start of designated
operation) is prohibited until it is determined that the full system meets the
requirements stipulated in EC Directive (2014/35/EU,2014/30/EU, etc.)
The grid connected inverter leave the factory completely connecting device
and ready for connection to the mains and PV supply ,the unit shall be
installed in accordance with national wiring regulations. Compliance with
safety regulations depends upon installing and configuring system correctly,
including using the specified wires. The system must be installed only by
professional assemblers who are familiar with requirements for safety and
EMC. The assembler is responsible for ensuring that the end system complies
with all the relevant laws in the country where it is to be used.
The individual subassembly of the system shall be interconnected by means
of the wiring methods outlined in national/international such as the national
electric code (NFPA) No.70 or VDE regulation 0107.
3 Introduction
3.1 Basic features
Thanks for your purchasing with SolaX X3-PRO G2 Serial inverter. The X3-
PRO G2 Series inverter is one of the finest inverters on the market today,
incorporating state-of-the-art technology, high reliability, and convenient
control features.
Advanced DSP control technology.
Utilize the latest high-efficiency power component.
Optimal MPPT technology.
- 2/3 MPP Tracking.
- Wide MPPT input range.
Advanced anti-islanding solutions.
IP66 protection level.
Max. efficiency up to 98.5%. EU efficiency up to 98.0%.
THD<3%.
Safety &Reliability: transformerless design with software and hardware
protection.
Export control.
Power factor regulation.
Friendly HMI.
- LED status indications.
- LCD display technical data, human-machine interaction through press
key.
- PC remote control.
- Upgrade through USB interface.
- Pocket WiFi/LAN/4G monitoring.
3.2 Terminals of inverter
10 11
Safety Introduction
A B C D
EF
G

Warning!
Only authorized personnel is allowed to set the connection.
3.3 Dimension
Ø
Dimension
4 Technical Data
4.1 DC Input
Max. recommended DC power [W]
Max. DC voltage [V]
Norminal DC operating voltage [V]
Operating voltage range [V]
MPPT voltage range@full load [V]
Max. input current [A]
Max. short circuit current [A]
Start input voltage [V]
No. of MPP trackers
Strings per MPP tracker
DC disconnection switch
0
12000
1100
650
160-980
350-850
32/32
40/40
200
2
A:2/B:2
12 13
Introduction Technical Data
X3-PRO-8K-G2(2D)
Model X3-PRO-10K-G2(2D) X3-PRO-15K-G2(2D)
15000
1100
650
160-980
350-850
32/32
40/40
200
2
A:2/B:2
18000
1100
650
160-980
350-850
32/32
40/40
200
2
A:2/B:2
22500
1100
650
160-980
400-850
32/32
40/40
200
2
A:2/B:2
Max. inverter backfeed current to
the array [mA]
Yes
Object
A DC switch
PV connector
Dongle port for
COM
B
C
D
E
F
Description
RS485
AC connector
Pocket WiFi /LAN (optional) /4G (optional)
482.00 mm
417.00 mm
186.00 mm
417.00 mm
X3-PRO-12K-G2(2D)
Ground connection port
G
25500
1100
650
160-980
400-850
32/32
40/40
200
2
A:2/B:2
X3-PRO-17K-G2(2D)
Max. recommended DC power [W]
Max. DC voltage [V]
Norminal DC operating voltage [V]
Operating voltage range [V]
MPPT voltage range@full load [V]
Max. input current [A]
Max. short circuit current [A]
Start input voltage [V]
No. of MPP trackers
Strings per MPP tracker
DC disconnection switch
0
22500
1100
650
160-980
400-850
32/32/32
40/40/40
200
3
A:2/B:2/C:2
X3-PRO-15K-G2(3D)
Model
X3-PRO-20K-G2(2D)
X3-PRO-25K-G2(3D)
30000
1100
650
160-980
400-850
32/32
40/40
200
2
A:2/B:2
30000
1100
650
160-980
400-850
32/32/32
40/40/40
200
3
A:2/B:2/C:2
37500
1100
650
160-980
500-850
32/32/32
40/40/40
200
3
A:2/B:2/C:2
Max. inverter backfeed current to
the array [mA]
Yes
X3-PRO-20K-G2(3D)
45000
1100
650
160-980
500-850
32/32/32
40/40/40
200
3
A:2/B:2/C:2
X3-PRO-30K-G2(3D)
25500
1100
650
160-980
400-850
32/32/32
40/40/40
200
3
A:2/B:2/C:2
X3-PRO-17K-G2(3D)

4.2 AC Output
Nominal AC power [VA]
Max. apparent AC power [VA]
Rated grid voltage [V]
Rated AC frequency [Hz]
Nominal AC current [A]
Max. AC current [A]
THDi
Displacement power factor
Feed-in phase
8000
8800
12.2/11.6
13.2
Model
10000
11000
15.2/14.5
16.0
<3%
0.8 leading-0.8 lagging
Three-phase
50/60
12000
13200
18.2/17.4
19.3
15000
16500
22.8/21.8
24.2
4.3 Efficiency, Safety and Protection
MPPT efficiency
Euro efficiency
Max. efficiency
Safety & Protection
Over/under voltage protection
DC isolation protection
Grid protection
DC injection monitoring
Back feed current monitoring
Residual current detection
Anti-islanding protection
Over temperature protection
ARC protection
SPD protection
99.90%
97.70%
98.20%
99.90%
97.70%
98.20%
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Optional
Type II
Model X3-PRO-8K-G2(2D)
X3-PRO-10K-G2(2D)
X3-PRO-15K-G2( 2D)
X3-PRO-12K-G2(2D)
99.90%
97.80%
98.30%
X3-PRO-25K-G2(3D)
X3-PRO-30K-G2(3D)
99.90%
98.00%
98.50%
14 15
99.90%
97.80%
98.30%
99.90%
97.80%
98.30%
Technical Data
Technical Data
X3-PRO-17K-G2(2D) X3-PRO-20K-G2(2D)
17000
18700
25.8/24.7
27.5
Nominal AC power [VA]
Max. apparent AC power [VA]
Rated grid voltage [V]
Rated AC frequency [Hz]
Nominal AC current [A]
Max. AC current [A]
THDi
Displacement power factor
Feed-in phase
15000
16500
22.8/21.8
24.2
Model
20000
22000
30.3/29.0
33.6
<3%
0.8 leading-0.8 lagging
Three-phase
20000
22000
30.3/29.0
33.6
X3-PRO-15K-G2(3D) X3-PRO-25K-G2(3D) X3-PRO-20K-G2(3D)
25000
27500
37.9/36.3
41.8
30000
30000
45.5/43.5
45.5
X3-PRO-30K-G2(3D)
X3-PRO-17K-G2(3D) X3-PRO-20K-G2(3D)
3~/N/PE, 220/380 V, 230/400 V; 3~/PE, 380 V, 400 V
50/60
3~/N/PE, 220/380 V, 230/400 V; 3~/PE, 380 V, 400 V
X3-PRO-8K-G2(2D) X3-PRO-10K-G2(2D) X3-PRO-15K-G2(2D) X3-PRO-12K-G2(2D) X3-PRO-17K-G2(2D) X3-PRO-20K-G2(2D)
17000
18700
25.8/24.7
27.5
X3-PRO-17K-G2(3D)
X3-PRO-15K-G2( 3D)

4.4 General Data
Dimension (W/H/D)[mm]
Dimension of packing (W/H/D)[mm]
Net weight [kg]
Gross weight [kg]
Installation
Operating temperature range [℃]
Storage temperature [℃]
Storage/Operation relative humidity
Altitude [m]
Ingress protection
Isolation type
Protective class
482x417x186
590x530x315
Wall-mounted
-30~+60 (Derating at 45)
-30~+60
0%~100%, condensation
4000(>3000 derating)
IP66
Transformerless
5 Installation
5.1 Check for Transport Damage
5.2 Packing List
Make sure the inverter is intact during transportation. If there are some
visible damages, such as cracks, please contact your dealer immediately.
Open the package and fetch out the product, check the accessories at
first. The packing list is shown as below.
Object
X3-PRO G2 series inverter1A
ABE
B
C
D
E
G
H
I
J
K
1
8/12
8/12
9
5
1
1
1
Bracket
PV terminal (positive*4 , negative*4 for two strings,
positive*6 , negative*6 for three strings)
(Expansion bolt, Gasket, Self-tapping screw)*3
Product manual
Quick installation guide
Quantity Description
Technical Data Installation
Model
L1
Pocket WiFi /LAN (Optional) /4G (Optional)
G
K L
M
24.5 28
28.5 32
H
N
5
Meter (Optional)
1
M N
PV pin contact (positive*4 , negative*4 for two strings,
positive*6 , negative*6 for three strings)
Terminal block*1, RJ45 connector*1,
F
F4
1
X3-PRO-8K-G2(2D)
X3-PRO-10K-G2(2D) X3-PRO-15K-G2 (2D) X3-PRO-12K-G2(2D) X3-PRO-30K-G2(3D) X3-PRO-25K-G2(3D)
26
30
24.5
28.5
16 17
IJ
OT terminal*5
Terminal cover*5
X3-PRO-20K-G2(2D)
X3-PRO-17K-G2(2D)
26
30
Terminal sleeve*1, R-type terminal*1
CD
X3-PRO-20K-G2(3D)
X3-PRO-17K-G2(3D)
27.5
31.5
Noise level
Night-time consumption
Over voltage category
Pollution degree
Cooling concept
Communication interface
Standard warranty [year]
I
<3 W
III(MAINS), II(PV)
II
X3-PRO G2 Series 8 kW-30 kW
M5 inner hexagonal screw
AC waterproof cover
X3-PR O G2 Seri es
User Manual
8 kW - 30 kW
Copyright Declaration
The copyright of this manual belongs to SolaX Power Network Technology (Zhejiang) Co., Ltd. Any
corporation or individual should not plagiarize, partially or fully copy (including software, etc.),
and no reproduction or distribution of it in any form or by any means shall be allowed. All rights
reserved. SolaX Power Network Technology (Zhejiang) Co., Ltd. reserves the right of final
interpretation.
28
32
Natural cooling Smart fan cooling
<35 dB <55 dB <58 dB
X3-PRO-15K-G2(3D)
Meter, USB, RS485_Modbus, WiFi / LAN (Optional)/4G (Optional), DRM (Optional)
5 (10 optional)
Inverter Topology Non-isolated

5.3 Installation Precaution
Please avoide direct sunlight, rain exposure, snow laying up during installing and
operating.
X3-PRO G2 Series inverter is designed for outdoor installation (IP66).
Make sure the installation site meets the following conditions:
Not in direct sunlight.
Not in areas where highly flammable materials are stored.
Not in potential explosive areas.
Not near the television antenna or antenna cable.
Not higher than altitude of about 4000 m above sea level.
Not in environment of precipitation or humidity.
Be sure the ventilation is good enough.
The ambient temperature in the range of -30℃ to +60℃.
The slope of the wall should be within ±5°.
5.4 Installation Steps
Preparation
Ø
Below tools are needed before installation.
Installation Installation
The wall hanging the inverter should meet conditions below:
1. solid brick/concrete, or strength equivalent mounting surface;
2. Inverter must be supported or strengthened if the wall’s strength isn’t
enough(such as wooden wall, the wall covered by thick layer of decoration)
Type
Machine Installation Tools
Tool equipment
Bit Φ10
Name Image
Hammer
drill
Outer
hexagonal
wrench
Torque
screwdriver
Name Image
Utility knife
Diagonal
pliers
Multifunction
terminal
crimping
tool (RJ45)
Multimeter
Marker
Tape
measure
Protective
glasses
Safety
gloves
Individual
Protection
Tools
Rubber
hammer
OT
terminal
press clamp
0.5mm²~10mm²
Wrench
Screwdrivers
Inner
hexagonal
wrench
Crimping
Tool
Crosshead M5
DC Voltage
Range ≥1100 VDC
Wire
stripper
18 19

≥300 mm
≥300 mm
≥300 mm≥300 mm 300 mm
300 mm
300 mm
300 mm
300 mm
Position Min Distance
Left
Right
Up
Down
Forward
Reserved space dimensions of
installation
5.4.1 Installation Space Requirements
Reserve enough space when installing inverter (at least 300 mm) for heat
dissipation.
The distance of installation space for multiple inverters is as follows:
Step 1: Fix the bracket to the wall.
Ø
First find the expansion screws and the bracket in the accessory bag, as
shown below:
a) Mark the holes on the wall with a marker.
b) Drill holes at the marked points to a depth of at least 60 mm.
a)
5.4.2 Mounting
20 21
≥300 mm
≥300 mm
Expansion bolts, Gasket, Self-tapping screws Bracket
b)
Φ10 Drill
(Depth: 60 mm)
Installation Installation
60.00 mm

Step 2: Hang the inverter on the bracket.
c) Insert expansion bolts into the holes, use rubber hammer to knock the
expansion bolts into the wall.
d) Insert the self-tapping screws into the gaskets and use the outer hexagon
wrench to tighten them.
c)
Expansion bolts
Rubber hammer
d)
Self-tapping
screw
Outer hexagonal wrench
Gasket
Step 3: Tighten the inverter and bracket.
Ø
f ) Use the inner hexagonal wrench to tighten the inner hexagonal screw on
the right side of the inverter.
e)
f )
Inner hexagonal wrench
(Torque :1.2±0.1 N·m)
Installation Installation
22 23
e) Hang the buckle of the inverter to the corresponding position of the
bracket;
Ø

5.5 Connection of the Inverter
PV String Connection
Ø
X3-PRO G2 series inverter have three couples of PV connectors which can be
connected in series into 3-strings PV modules. Please select photovoltaic
modules with good performance and quality assurance. The open circuit voltage
of the module array should be less than the maximum PV input voltage specified
by the inverter, and the operating voltage should be within the MPPT voltage
range.
Table 3 Max. DC Voltage Limitation
Max. DC Voltage 1100 V
Warning!
The voltage of PV modules is very high and dangerous , please
comply with the electric safety rules when connecting.
Warning!
Do not ground the positive or negative pole of the
photovoltaic module!
Note!
Please follow the requirements of PV modules as below:
Same type; Same quantity; Identical alignment; Identical tilt.
In order to save cable and reduce the DC loss, we suggest
installing the inverter near PV modules.
5.5.1 The Main Steps to Connect to the Inverter
Inverter+BMU
Installation Installation
Model
Danger!
Danger to life due to high voltage on DC conductors.
when exposed to sunlight, the PV array generates dangerous DC
voltage which is present in the DC conductors. Touching the DC
conductors can lead to lethal electric shocks.
Do not cover the PV modules. Do not touch the DC conductors.
Connection Steps
X3-PRO-8K-G2(2D)
X3-PRO-10K-G2(2D)
X3-PRO-15K-G2 (2D)
X3-PRO-12K-G2(2D) X3-PRO-25K-G2(3D)
24 25
X3-PRO-30K-G2(3D)
Step 1. Turn off the DC switch, connect the PV module, prepare a 2.5-4 mm PV
cable, and find the PV (+) terminals and PV (-) terminals in the package.
PV cable PV pin contacts Negative terminals
Positive terminals
Step 2. Use a wire stripper to strip 7 mm insulation layer from the wire end.
7.0 mm
Wire stripper
Step 3. Tighten the cable with the insulation layer stripped and insert it into
the pin contact (see Figure 1), make sure all wires are inserted into the pin
contact (see Figure 2).
Figure 1
Figure 2
Positive PV
pin contact Negative PV
pin contact
X3-PRO-17K-G2(2D)
X3-PRO-20K-G2(3D) X3-PRO-17K-G2(3D)
X3-PRO-20K-G2(2D)
X3-PRO-15K-G2 (3D)

PV+
PV-
Step 5. Divide the PV terminal into 2 parts - the plug and the fastening
head. Insert the cable through the fastening head and the corresponding
plug. Note that the red and black lines correspond to different plugs.
Finally, force the cable pair into the plug, there will be a "click" sound,
which indicates that the connection is completed.
Step 6. Tighten the fastening head and insert into the corresponding
positive and negative (PV+/PV-) ports of the inverter.
Step 4. Tighten the PV pin contact and the wiring harness to make
the connection tight without looseness.
Crimping Tool
Negative
Positive
Positive
Negative
PV+
PV+
PV- PV-
The following is the location of the inverter's positive and negative (PV+/PV-)
ports.
Schematic diagram of the inverter PV connected.
Installation Installation
26 27

Connection Steps
Grid Connection
Ø
X3-PRO G2 series inverter are designed for three phase grid. Rated grid voltage
is 230 V, frequency is 50/60 Hz. Other technical requests should comply with
the requirement of the local public grid.
Micro-breaker should be installed between inverter and grid, any loads should
not be connected with inverter directly.
Note: Check the grid voltage and compare with the permissive voltage range
(refer to technical data).
a) Disconnect the circuit-bricker from all the phases and secure against re-
connection.
b) Select appropriate cable and prepare to strip the wires:
- Strip 82 mm of insulation from the cable end.
- Use the stripping pliers to strip 12 mm of insulation from wire ends as below.
Table 4 Cable and Micro-breaker recommended
Incorrect Connection between Load and Inverter
L1, L2, L3 Cable
PE, N Cable
4-5 mm²
Model
5-6 mm²
*The parameters have some differences because of different environment and material. Please
choose appropriate cable and micro-breaker according to the local conditions.
5-6 mm² 8-10 mm² c) Fetch the AC waterproof cover from the carton.
e) Strip 82 mm of insulation from the cable ends by using the stripping
pliers.
Micro-breaker 16 A 32 A 50 A
2.5-5 mm² 3-6 mm² 3-6 mm² 3-6 mm²
X3-PRO-8K-G2(2D) X3-PRO-10K-G2(2D) X3-PRO-15K-G2(2D) X3-PRO-12K-G2(2D) X3-PRO-30K-G2(3D) X3-PRO-25K-G2(3D)
20 A 25 A
3-6 mm² 3-6 mm²
6-8 mm²
5-6 mm²
40 A
10 mm²
63 A
3-6 mm²
28 29
L1 L2 L3 N PE
f ) Crimp the wire ends by using the wire crimper.
12 mm
Stripping pliers Stripping pliers
Crimp
82 mm
70 mm
12 mm
12 mm
70 mm
70 mm
Wire crimper
g) Pull one terminal cover each over conductors L1, L2, L3, N and the
grounding conductor. The terminal cover must be below the stripped
conductor section.
h) Use the OT terminal crimping tool to press OT terminals.
Installation Installation
X3-PRO-17K-G2(2D)
X3-PRO-20K-G2(3D)
X3-PRO-20K-G2(2D)
X3-PRO-17K-G2(3D)
strip length
L1
L2
L3
82 m m
12 m m
d) Unscrew the fastening nut of the AC waterproof cover and remove the
sealing rings. Select appropriate number of the sealing rings according to
the outer diameter of the cable. Let the cable pass through the fastening
nut, the sealing ring(s) and the waterproof cover in sequence.
a
b
Diameter(mm) Sealing ring(s)
a
a+b12~18
18~25
diameter
X3-PRO-15K-G2(3D)

j) Align the waterproof cover and tighten the four screws with an inner
hexagonal wrench.
Torque:1.2 0.1 ±N·m
Torque:0.1 1.2± N·m
k) Tighten the waterproof fastening head.
Installation Installation
Mains cable (AC line cable) shall be short-circuit protected and thermal overload
protected.
Always fit the input cable with fuse. Normal gG (US:CC or T) fuses will protect the
input cable in short circuit situation. They will also prevent damage to adjoining
equipment.
Dimension the fuses according to local safety regulations, appropriate input
voltage and the related current of the solar inverter.
The rated short-circuit breaking capacity of the above protective device shall be
at least equal to the prospective fault current at the point of installation. See
section technical data of this manual for details.
2 2
AC output cable: Cu; L1,L2,L3, N+PE: 3*5.0 mm +2*5.0 mm for 8 kW and 3*6.0
mm +2*6.0 mm for kW/12 kW/15 kW and 3*8.0 mm +2*6.0 mm for 17 kW/20
2 2 2 2
10
2 2
kW and 3*10.0 mm +2*6.0 mm for 25 kW/30 kW @40 ambient temperature ℃
with a max length of 5 m, with operating time of the fuses is less than 5 seconds,
installation method B2 according to 60204-1:2006, annex D: cable in conduit EN
cable trunking system, number of loaded circuit only one. Use H07 (cord RNF
designation 60245 66) for an ambient temperature of 40℃ or less and use IEC
90℃ wire for ambient temperature between 40℃ and 60℃.
Selection of Fuses and Cables
30 31
L1 L2 L3 N PE
i) Tighten the screws of the wire ends with a screwdriver.
1. For condition differing from those mentioned above,
dimension the cables according to local safety regulations,
appropriate input voltage and the load current of the unit.
(You can choose a thicker cable but the fuses must be rated
according to the rating of the cable.)
2. Fuses must be approved by Notified Body.
Note!
Therefore the current-carrying capacity of the components and sub-assemblies
provided in the end-use system (connectors, cables, junction box, switchgear,
etc.) and the reverse current PV modules shall be considered based on the
feedback current and reverse current. The direct current (DC) circuit breaker or
fuse between each solar generator and inverter shall be provided based on
solar inverter input ratings.
Select DC cables based on the above inverter back-feed current and ISC PV
rating and Vmax ratings.

32 33
Installation Installation
Earth Connection
Ø
Tighten the ground screw with an inner hexagonal wrench as shown in
the figure below. (φ5 inner hexagonal screw. Torque:1.2±0.1 N·m)
5.5.2 Communication interface
This product has a series of communication interfaces: such as
WiFi/LAN/GPRS, RS485/Meter, DRM and USB for upgrading for human
and machine communication. Operating information like output voltage,
current, frequency, faulty information, etc., can be delivered to PC or
other monitoring equipment via these interfaces.
1.WiFi /LAN (Optional) /4G(Optional)
This inverter provides a WiFi/LAN connecting port(the Dongle port) which
can collect information from inverter including the status, performance and
updating information to the monitoring website via connecting Pocket WiFi
(Pocket LAN can be purchased from the supplier for optional if needed).
Connection steps:
Please check the Pocket WiFi user manual for more details.
This is a communication interface for engineers to adjust the inverter.
a. RS485
b. Meter (Optional)
1.Monitor the energy to grid and from grid throughout the whole day.
2.Achieve the export control function with a higher accuracy.
Electrical
grid
Electric meter,
bidirectional three-phase
meter
Load
X3-PRO G2 series inverter
A meter can communicate with the X3-PRO G2 series inverter through this
interface, then you can:
The smart meter must be authorized by SolaX, any third party or
non-authorized meter may not match with the inverter.
SolaX will not take the responsibility if the unauthorized meter is
unavailable.
2.RS485/Meter
Please see the Quick Installation Guide for three-Phase Meter for details.
Meter Connection Steps:
Household Distribution
Units
Note!

Installation Installation
34
3.RJ45 Connection Steps:
(1) Prepare RJ45 connector and a communication cable.
(2) Strip the insulation from the communication cable.
(3) Let the communication cable pass though the waterproof connector
with RJ45, then insert it into the RJ45 connector following the PIN definition
rule.
(4) Crimp the RJ45 connector with the crimping plier.
(5) Insert the cable into the COM port of the inverter, and tighten the
waterproof connector.
a. DRM is provided to support several demand response modes by giving
control signals as below.
1
8
DRM, Dry Contact, Heat Pump Controller Steps:
Pin
Definition
123 4 5678
X X X X REF GEN DRM0
Pin
Definition
123 4 5678
Dry Contact+ X X
Pin
Definition
123 4 5678
X XHeat Pump Controller+
X X
X X
b. Dry Contact is provided to control the closing and breaking of switches by
giving control signals as below.
c. Heat Pump Controller is provided to draw heat from the surroundings and
transfer it to the object to be heated by sending control signals as below.
Dry Contact-
Heat Pump Controller-
1. Prepare RJ45 connector and a communication cable.
2. Strip the insulation from the communication cable.
3. Let the communication cable pass though the waterproof plug, then
insert it into the RJ45 connector following the PIN definition rule.
4. Crimp the RJ45 connector with the crimping plier.
5. Insert the cable into the COM port of the inverter, and tighten the
waterproof plug.
Connection Steps:
X X
X X
X X
35
The PIN denitions of RS485/Meter interface are as below.
12
Pin
Definition
123 4 56
485A 485B 485A 485B meter A meter B

Installation Installation
4. Upgrade
The inverter system can be updated through an U-disk.
1) Please contact our service support to get the update file, and extract
it into your U-disk as the following file path:
Make sure the directory is in accordance with above form strictly!
Do not modify the program file name! Or it may cause the inverter
to stop working!
Make sure the input voltage is more than 200 V (in good illumination
condition), or it may result in failing during updating.
“update\ARM\ ”;618.xxxxx.00_MICPROG2_ARM_Vx.xx_xxxxxxxx.usb
“update\DSP\618.xxxxx.00_MICPROG2_DSP_V usb”.x.xx_xxxxxxxx.
Upgrade Steps:
Note: Vx.xx is version number, xxxxxxxx is file completion dates.
2) Make sure the DC switch is off and the AC is disconnected with grid.
If the Pocket WiFi is connected to the port, please remove the Pocket WiFi at
first.
3) Then insert the U-disk into the Dongle port on the bottom of the inverter.
Then turn on DC switch and connect the PV connector, the LCD will show a
picture as below.
During updating, don’t turn off the DC switch or disconnect the
PV connector. If the updating stopped due to PV power failure,
do not unplug the U-disk. When the PV power recovers, the
update will continue. If the updating stopped due to other
reasons, reinsert the U-disk to continue the update.
4) Press the “Up” and “Down” button to select ARM or DSP. Then long press
“Down” and select the correct update file to confirm the update. ARM and
DSP shall be updated one by one.
Update
ARM
DSP
5) After the upgrade is completed, please remember to turn off the DC
switch or disconnect the PV connector, then pull off the U-disk, and connect
the Pocket WiFi back.
36 37