INHENERGY SI-4K-T2 User manual

INHENERGY CO., LTD.
Solar Inverter
Operation Manual
Model: SI-4/6K-T2, SI-8/12K-T2, SI-13/20K-T2, SI -22/33K-T2

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CONTENTS
1 NOTES ON THIS MANUAL...........................................................................................................- 3 -
1.1 VALIDITY................................................................................................................................... - 3 -
1.2 SYMBOL DESCRIPTION........................................................................................................- 3 -
2 OVERVIEW.......................................................................................................................................- 5 -
2.1 PRODUCT INTRODUCTION................................................................................................. - 5 -
2.2 APPEARANCE..........................................................................................................................- 5 -
3 INSTALLATION................................................................................................................................- 7 -
3.1 VISUAL CHECK........................................................................................................................- 7 -
3.2 PACKING LIST..........................................................................................................................- 7 -
3.3 MOUNTING............................................................................................................................... - 8 -
3.4 SPACE REQUIREMENT......................................................................................................... - 9 -
3.5 MOUNTING STEPS...............................................................................................................- 10 -
4 ELECTRICAL CONNECTION..................................................................................................... - 11 -
4.1GRID CONNECTION.............................................................................................................. - 11 -
4.2 PV CONNECTION................................................................................................................. - 13 -
4.3 RS 485 CABLE CONNECTION........................................................................................... - 15 -
4.4 TURN-OFF THE INVERTER................................................................................................ - 16 -
5 POWERING ON THE SYSTEM.................................................................................................. - 16 -
5.1 START-UP THE INVERTER................................................................................................. - 16 -
5.2 TIME SETTING FOR THE FIRST RUN..............................................................................- 16 -
6 LCD SCREEN OPERATION....................................................................................................... - 16 -
7 MAINTENANCE AND CLEANING.............................................................................................- 17 -
7.1 MAINTAIN PERIODICALLY..................................................................................................- 17 -
7.2 TROUBLE SHOOTING......................................................................................................... - 18 -
8 DECOMMISSIONING................................................................................................................... - 18 -

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8.1 REMOVE THE INVERTER................................................................................................... - 19 -
8.2 PACKAGING........................................................................................................................... - 19 -
8.3 STORAGE AND TRANSPORTATION.................................................................................- 20 -
9 TECHNICAL PARAMETERS...................................................................................................... - 20 -
10 MANUFACTURER'S WARRANTY.......................................................................................... - 20 -
11 CONTACT.....................................................................................................................................- 24 -

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1 Notes on this manual
1.1 Validity
This manual describes the assembly, installation, commissioning and maintenance of the
following Inhenergy Inverter model:
SI-4/6K-T2
SI-8/12K-T2
SI-13/20K-T2
SI-22/30K-T2
Operator Requirements
This manual is for qualified electrical engineers who have received proper training and
have demonstrated skills and knowledge in the construction and operation of this equipment.
Operators must be trained to deal with the possible dangers and hazards involved in
installing electrical devices.
Additional information
Further information on special topics can be found in the download section at
www.inhenergy.com
The manual and other documents must be stored in a convenient place and be available
at all times. We assume no liability for any damage caused by failure to observe these
instructions. For possible changes in this manual, Inhenergy Co., Ltd. accepts no
responsibilities to inform the users.
1.2 Symbol Description
Please pay close attention to all the symbols for the purpose of avoiding possible personal
injury or equipment break down.
Symbol
Description
DANGER indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
CAUTION indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.

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Markings on this product
NOTICE is used to address practices not related to personal
injury
Information refers tow what the operator must read and
understand to ensure optimal operation of the system.
Symbol
Description
Caution，risk of electric shock
Caution，hot surface
Operate after 5 minutes
Read the manual
Point of connection for grounding protection
CE mark.
The inverter complies with the requirements of the applicable CE
guidelines.
The inverter must not be disposed of with the household waste.
Burn warning
Do not touch an operating inverter because it generates high
temperatures on the shell.

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2 Overview
2.1 Product Introduction
Main Function
The Inverter is a three-phase grid-tied PV string inverter that converts the DC power generated
by PV strings into AC power and feeds into the power grid.
Models
This document is applicable for the following models:
SI-4K-T2, SI-4K-T2, SI-6K-T2;
SI-8K-T2, SI-10K-T2, SI-12K-T2;
SI-13K-T2, SI-15K-T2, SI-17K-T2, SI-20K-T2;
SI-22K-T2, SI-25K-T2, SI-27K-T2, SI-30K-T2；
Model description (Model SI-20K-T2 as an example):
Model description
2.2 Appearance
Item
Meaning
Description
1
Product
Abbreviation for Solar Inverter
2
Power Level
4K-T2 ：The rated power is 4 kW.
8K-T2 ：The rated power is 8 kW.
13K-T2：The rated power is 13 kW.
20K-T2：The rated power is 20kW.
30K-T2：The rated power is 30 kW.
T2: Second generation product of three phase
inverter

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①LED indicator ②LCD display ③Function button ④DC switch
⑤DC input terminals (PV1) ⑥DC input terminals (PV2) ⑦GPRS/WIFI output port
⑧Communication port (RS485) ⑨AC output port ⑩Cooling fan
LED indicator description
Category
Status
Meaning
Blinking green at short intervals
waiting status
Blinking green at long intervals
Self-check
Steady green
normal status
Steady yellow
Alarm
Off
No alarm
Blinking red at short intervals
Fault
Off
faultless

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Function button description
3 Installation
3.1 Visual Check
Make sure the inverter is intact during transportation. If there is any visible damage, such as
cracks, please contact your dealer immediately.
3.2 Packing List
Open the package and take out the product, please check the accessories first.
The packing list shown as below.
Category
Description
ESC button: Return from current interface or function.
Down button: Move cursor to downside or decrease value
Up button: Move cursor to upside or increase value.
OK button: Confirm the selection.

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*C : 4-12K PV connectors (2*positive,2*negative);
13-17K PV connectors (3*positive,3*negative);
20-25K PV connectors (4*positive,4*negative);
27-30K PV connectors (5*positive,5*negative);
*D : 4-12K PV pin connectors (2*positive,2*negative);
13-17K PV pin connectors (3*positive,3*negative);
20-25K PV pin connectors (4*positive,4*negative);
27-30K PV pin connectors (5*positive,5*negative);
3.3 Mounting
Installation Precaution
4-30KW series inverter is designed for outdoor installation (IP 65).
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 in the cool air directly.
◆Not in environment of precipitation or humidity (＞95%).
◆Under good ventilation condition.
◆The ambient temperature is between the range of -20℃to +60℃.
◆The wall hanging the inverter should meet conditions below:
1.Solid brick/concrete, or strength equivalent mounting surface;
Object
Description
Quantity
A
Solar Inverter
1
B
Bracket
1
*C
PV connectors (4*positive,4*negative)
4/4
*D
PV pin connectors (4*positive, 4*negative)
4/4
E
User manual
1
F
Expansion tubes
3
G
Expansion screws
3
H
Ring terminal
6
I
Set screw( for mounting，external enclosure grounding)
2
J
Wifi module (optional)
1
K
RS485 connector (optional)
1

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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).
Please avoid direct sunlight, rain exposure, snow laying up during winter.
◆The slope of the wall should be within 15°.
3.4 Space Requirement

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3.5 Mounting Steps
1.Use the wall bracket as a template to mark the position of 3 holes on the wall.
2.Drill holes with driller, make sure the holes are deep enough (at least 60mm) for installation,
and then tighten the expansion tubes.
3. Install the expansion tubes in the holes, and tighten them. Then install the wall bracket by
using the expansion screws.(Φ10 driller, torque: 2.5±0.2Nm)
4. Hang the inverter over the bracket, move the inverter close to it, slightly lay down the inverter,
and make sure the 2 mounting bars on the back are fixed well with the 2 grooves on the
bracket.
5.After confirming the inverter is fixed reliably, fasten two M5 safety-lock sockets head cap
screws on the right or left side firmly to prevent the inverter from being lifted off the bracket
(torque: 2.0±0.2Nm)

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4 Electrical Connection
4.1Grid Connection
4-30KW series inverters are designed for three-phase grid. Voltage is 400V, frequency is
50/60Hz. Other technical requests should comply with the requirement of the local public grid.
Micro-breaker should be installed between inverter and grid, any load should not be
connected with inverter directly.

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Table 3: Cable recommended
Connection Steps
1. Choose the appropriate wire(Cable size:please refer to Table3).
2. Remove 12mm of insulation from the end of wire.
3. Insert stripped wires into AC terminal and ensure that all conductor strands are captured in
the AC terminal.
4. Compress the terminal head by using a crimping pliers .
5. Insert AC cable into port through screw cap and then tighten the screw cap.
4K-12K：
Model
Copper Cable
Conductor cross-section
4K-12K
Five-core cable
（L/N/PE）
4mm²
13K-17K
6mm²
20K-22K
10mm²
25K-30K
16mm²

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13W-30KW：
4.2 PV connection
◆Conditions for DC Connection
The inverter has 2 independent input : PV1 & PV2 Notice that the connectors are in paired
(male and female connectors). The connectors for PV arrays and inverters are H4 connectors;
The solar modules connected to the inverter must conform to the
Class A requirements of the IEC 61730 standard.
If the inverter is not equipped with a DC switch but this is mandatory in the
country of installation, install an external DC switch.The following limit
values at the DC input of the inverter must not be
exceeded:
Model
Max current PV1
Max current PV2
4K-12K
13K-17K
20K-25K
27K-30K
13A
26A
26A
39A
13A
13A
26A
26A

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◆Connecting the PV Array
Connection Steps:
1. Choose the 12 AWG wire to connect with the cold-pressed terminal.
2. Remove 7mm of insulation from the end of wire.
3. Insert the insulation into pin contact and use crimping plier to clamp it.
4. Insert pin contact through the cable nut to assemble into back of the male or female plug.
When you feel or heard a “click” sound the pin contact assembly is seated correctly.
5. Plug the PV conntector into the corresponding PV connector on inverter.
Danger to life due to lethal voltages!
◆PV array supplies d.c voltage to inverter when exposed to light,before
connecting the PV array, cover some light screens above PV
arrays,ensure that the DC switch and AC breaker are disconnect from the
inverter. NEVER connect or disconnect the DC connectors under load.
◆Make sure the maximum open circuit voltage(Voc) of each PV string is
less than the maximum input voltage of the inverter.
◆Check the design of the PV plant. The Max. open circuit voltage, which
can occur at solar panels temperature of -10℃, must not exceed the Max.
input voltage of the inverter.
◆Improper operation during the wiring process can cause fatal injury to
operator or unrecoverable damage to the inverter. Only qualified
personnel can perform the wiring work.
◆Please don’t connect PV array positive or negative pole to the ground, it
can cause serious damages to the inverter
◆Check the connection cables of the PV modules for correct polarity and
make sure that the maximum input voltage of the inverter is not
exceeded

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4.3 RS 485 Cable Connection（Optional）
◆485 is provided the function of remote control that allows external control device to make
the inverters remote cluster control through 485 port on the inverter.
Connection Steps:
1.Uninstall the parts of the connection plug from the accessory bag.
2.Prepare communication cable,trip the insulation from the communication cable.
3.Let the communication cable pass though the waterproof connector , then insert it into the
connector following the PIN definition rule.
4.Plug communication conntector into the corresponding conntector on inverter, the
completed appearance is like the below figure.
◆When routing the signal cable, ensure that it is separate from the power
cable and away from interfering sources to prevent communication from being
affected.
◆The protection layer of the cable is in the connector. Cut off surplus core
wires from the protection layer. Ensure that the core wires are completely
inserted into the cable holes, and that the cable is securely connected.

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4.4 Turn-off the Inverter
Turn-off the inverter step:
1.Disconnect the line circuit breaker from single-phases grid and prevent it from being
reactivated.
2.Turn off the dc switch.
3.Check the inverter operating status.
4.Waiting until LED, OLED have go out, the inverter is shut down.
5 Powering On the System
5.1 Start-Up the inverter
1.Turn on the DC switch at the bottom of the inverter.
2. If there is a DC switch between the PV string and the inverter, turn on the DC switch.
3. Turn on the AC switch between the inverter and the power grid.
4. Observe the LEDs to check the operating status of the inverter.
5.2 Time Setting for The First Run
6 LCD Screen Operation
The main interface is the default interface, the inverter will automatically jump to this interface
when the system started up successfully or not operated for a period of time.
Menu interface
Do not disconnect the DC connectors under load.
Before turning on the AC switch between the inverter and the
power grid, use a multimeter set to the AC position to check
that the AC voltage is within the specified range.

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7 Maintenance and Cleaning
7.1 Maintain Periodically
1.Checking Heat Dissipation
If the inverter regularly reduces its output power due to high temperature, please improve the
heat dissipation condition. Maybe you need to clean the heat sink.

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2. Cleaning the Inverter
If the inverter is dirty, turn-off the AC breaker and DC switch ,waiting the inverter shut
down ,then clean the enclosure lid, the display, and the LEDs using only a wet cloth. Do not use
any cleaning agents (e.g. solvents or abrasives)
3. Checking the DC switch
Check for externally visible damage and discoloration of the DC switch and the cables at
regular intervals.If there is any visible damage to the DC switch, or visible discoloration or
damage to the cables, contact the installer.
7.2 Trouble shooting
Our quality control program assures that every inverter is manufactured to accurate
specifications and is thoroughly tested before leaving our factory. If you have difficulty in the
operation of your inverter, please read through the following information to correct the problem.
Alarm ID
Alarm Name
Suggestion
Alarm ID
Alarm Name
Suggestion
E00
Grid Volt Low
Check the AC
voltage range
E16
Remote Off
Check
background
instructions
E01
Grid Volt High
E18
SPI Error
Contact the
manufacturer
E02
Grid Freq
Low
E20
GFCI High
E03
Grid Freq
High
E21
GFCI Chk Error
E04
Bus Volt Low
Please switch off DC
switch.
Restart the invert
E22
Vol Not Same
E05
Bus Volt High
E23
Curr Not Same
E06
Bus
Imbalance
E26
Soft start erro
E07
ISO Low
Check PV
impedance to
ground
E27
PV Voltage
High
Check the PV
panel
configuration
E08
DC Curr High
Check the PV panel
configuration
E32
DSP Comm.
Error
Please switch
off DC switch.
Restart the
inverter
E09
Hw Invert
High
Contact the
manufacturer

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8 Decommissioning
8.1 Remove the Inverter
◆Disconnect the inverter from DC Input and AC output.
◆Wait for 5 minutes for de-energizing.
◆Disconnect communication and optional connection wirings.
◆Remove the inverter from the bracket.
◆Remove the bracket if necessary.
8.2 Packaging
◆Please pack the inverter with the original packaging.
◆If the original package is no longer available, you can also use an equivalent carton that
meets the following requirements.
E10
Invert I High
E11
Invert DCI
High
E12
Env T High
E13
Radiator Heat
E14
AC Contactor
E15
PV Voltage
Low
Check the PV panel
configuration
Alarm ID
Alarm Name
Suggestion
Alar
m ID
Alarm Name
Suggestion
W16
Clock Warn
Replace the
internal button pool
W05
Fan 1 Speed Low
Check the
external fan
W03
Active 0 Warn
Normal shutdown at
low power
W06
Fan2 Speed Low
W04
Array Warn
Check the PV panel
W07
Fan 3 Speed Low
W21
Arrester Warn
Check the lightning
arresters
W08
Fan 4 Speed Low