Invest Solar SIC-P-M-3T24-IS User manual

Table Of Contents
Information on this Manual.................................................................................................................................................................. 1
Validity...............................................................................................................................................................................................1
Scope................................................................................................................................................................................................. 1
Target Group.................................................................................................................................................................................... 1
Safety Instructions.......................................................................................................................................................................... 1
Introduction.............................................................................................................................................................................................2
Product Overview
.............................................................................................................................................................................3
Installation...............................................................................................................................................................................................4
Unpacking and Inspection..............................................................................................................................................................4
Mounting the Unit............................................................................................................................................................................4
Battery Connection.......................................................................................................................................................................... 5
Lead-acid Battery Connection....................................................................................................................................................5
Lithium Battery Connection (optional)..................................................................................................................................... 6
AC Input/Output Connection......................................................................................................................................................... 8
PV Connection.................................................................................................................................................................................. 9
Communication Connection......................................................................................................................................................... 10
Dry Contact Signal.........................................................................................................................................................................10
Operation...............................................................................................................................................................................................11
Power ON/OFF............................................................................................................................................................................... 11
Operation and Display Panel........................................................................................................................................................11
LCD Display Icons..................................................................................................................................................................... 12
LCD Setting................................................................................................................................................................................ 14
Display Setting............................................................................................................................................................................... 18
Operating Mode Description........................................................................................................................................................ 21
Warning Indicator..........................................................................................................................................................................22
Fault Reference Code....................................................................................................................................................................23
Specifications........................................................................................................................................................................................ 24
Trouble Shooting.................................................................................................................................................................................. 28

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1
Information on this Manual
Validity
This manual is valid for the following devices:
Off grid solar inverter with MPPT controller, 3KVA, model SIC-P-M-3T24-IS
Scope
This manual describes the assembly, installation, operation and troubleshooting of this unit. Please read this
manual carefully before installations and operations.
Target Group
This document is intended for qualified persons and end users. Tasks that do not require any particular
qualification can also be performed by end users. Qualified persons must have the following skills:
Knowledge of how an inverter works and is operated
Training in how to deal with the dangers and risks associated with installing and using electrical devices
and installations
Training in the installation and commissioning of electrical devices and installations
Knowledge of the applicable standards and directives
Knowledge of and compliance with this document and all safety information
Safety Instructions
WARNING: This chapter contains important safety and operating instructions.
Read and keep this manual for future reference.
1. CAUTION – Only qualified personnel can install this device with battery.
2. Before using the unit, read all instructions and caution marks on the unit, understand the batteries and all
appropriate sections of this manual.
3. NEVER cause AC output and DC input short circuited. Do NOT connect to the mains when DC input short
circuits.
4. NEVER charge a frozen battery.
5. Do not disassemble the unit. Take it to a qualified service center when service or repair is required.
Incorrect re-assembly may result in a risk of electric shock or fire.
6. To reduce risk of electric shock, disconnect all wiring before attempting any maintenance or cleaning.
Turning off the unit will not reduce this risk.
7. Be very cautious when working with metal tools on or around batteries. A potential risk, such as dropping a
tool to spark or short circuit batteries or other electrical parts, could cause an explosion.
8. For optimum operation of this off grid solar inverter, please follow required spec to select appropriate cable
size. It’s very important to correctly operate this off grid solar inverter.
9. Please strictly follow installation procedure when you want to disconnect AC or DC terminals. Please refer
to INSTALLATION section of this manual for the details.
10. GROUNDING INSTRUCTIONS –This off grid solar inverter should be connected to a permanent grounded
wiring system. Be sure to comply with local requirements and regulation to install this inverter.
11. Fuses with particular standard are provided as over-current protection for the battery supply.
12. Warning!! Only qualified service persons are able to service this device. If errors still persist after following
troubleshooting table, please send this off grid solar inverter back to local dealer or service center for
maintenance.

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Introduction
Hybrid Power System
This is a multifunctional off grid solar inverter, integrated with a MPPT solar charge controller, a high frequency
pure sine wave inverter and a UPS function module in one machine, which is perfect for off grid backup power
and self-consumption applications. The transformerless design provides reliable power conversion in compact
size.
The whole system also need other devices to achieve complete running such as PV modules, generator, or
utility grid. Please consult with your system integrator for other possible system architectures depending on
your requirements. The WiFi / GPRS module is a plug-and-play monitoring device to be installed on the
inverter. With this device, users can monitor the status of the PV system from the mobile phone or from the
website anytime anywhere.
Features
power 3KW, power factor 1
MPPT solar charge controller
High frequency inverter with small size and light weight
Pure sine wave AC output
Overload, short circuit and deep discharge protection
Configurable AC/ solar input priority via LCD setting
Compatible to mains voltage or generator power
WIFI/ GPRS remote monitoring

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Product Overview
Lead-acid Model Lithium Model
6. AC input
7. WiFi/GPRS communication port
8. USB communication port
9. Dry contact
10. PV input
11. Power on/off switch
12. Battery input
15. AC output
16. Circuit breaker
17. BMS communication Port (only supported the RS485 protocol)
18. RS485 communication Port (for expansion)
1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons

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Installation
Unpacking and Inspection
Before installation, please inspect the unit. Be sure that nothing inside the package is damaged. You should
have received the following items in the package:
The unit x 1
User manual x 1
USB Communication cable x 1
Software CD x 1
Preparation
Before connecting all wiring, please take off bottom cover by removing two screws as shown below.
Mounting the Unit
Consider the following points before selecting where to install:
Do not mount the inverter on flammable construction materials.
Mount on a solid surface
Install this inverter at eye level in order to allow the LCD display
to be read at all times.
The ambient temperature should be between 0°C and 55°C to
ensure optimal operation.
The recommended installation position is to be adhered to the
wall vertically.
Be sure to keep other objects and surfaces as shown in the right
diagram to guarantee sufficient heat dissipation and to have
enough space for removing wires.
SUITABLE FOR MOUNTING ON CONCRETE OR
OTHER NON-COMBUSTIBLE SURFACE ONLY.
Install the unit by screwing three screws. It’s recommended to use M4 or M5 screws.

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Battery Connection
Lead-acid Battery Connection
CAUTION: For safety operation and regulation compliance, it’s requested to install a separate DC over-current
protector or disconnect device between battery and inverter. It may not be requested to have a disconnect
device in some applications, however, it’s still requested to have over-current protection installed. Please refer
to typical amperage in below table as required fuse or breaker size. Ring terminal:
WARNING: All wiring must be performed by a qualified person.
WARNING: It's very important for system safety and efficient operation to use
appropriate cable for battery connection. To reduce risk of injury, please use the
proper recommended cable and terminal size as below.
Recommended battery cable and terminal size:
Model
Maximum
Amperage
Battery
capacity
Wire Size
Ring Terminal
Torque
value
Cable
mm2
Dimensions
D (mm)
L (mm)
SIC-P-M-3T24-IS
164A
100AH
1*2AWG
38
6.4
33.2
2~ 3 Nm
200AH
2*6AWG
28
6.4
29.2
Note: The recommended charge current is 0.2C for lead-acid battery.
Please follow below steps to implement battery connection:
1. Assemble battery ring terminal based on recommended battery cable and terminal size.
2. Connect all battery packs as units requires. It’s suggested to connect at least 100Ah capacity battery for
3KVA model .
3. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the bolts are
tightened with torque of 2-3 Nm. Make sure polarity at both the battery and the inverter/charge is correctly
connected and ring terminals are tightly screwed to the battery terminals.
WARNING: Shock Hazard
Installation must be performed with care due to high battery voltage in series.
CAUTION!! Do not place anything between the flat part of the inverter terminal and the ring
terminal. Otherwise, overheating may occur.
CAUTION!! Do not apply anti-oxidant substance on the terminals before terminals are connected
tightly.
CAUTION!! Before making the final DC connection or closing DC breaker/disconnector, be sure
positive (+) must be connected to positive (+) and negative (-) must be connected to negative
(-).

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Lithium Battery Connection (optional)
If choosing lithium battery for these series pruducts, you are allowed to use the lithium battery only which have
configured. There're two connectors on the lithium battery, RJ45 port of BMS and power cable.
Please follow below steps to implement lithium battery connection:
1. Assemble battery ring terminal based on recommended battery cable and terminal size (same as Lead acid, see
section Lead-acid Battery connection for details) .
2. Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure the bolts are
tightened with torque of 2-3Nm. Make sure polarity at both the battery and the inverter/charge is correctly connected
and ring terminals are tightly screwed to the battery terminals.
3. Connect the end of RJ45 of battery to BMS communication port of inverter.
4. The other end of RJ45 insert to battery comm port.
Note: if choosing lithium battery, make sure to connect the BMS communication cable between the battery and the
inverter. You need to choose battery type as “lithium battery”
Lithium battery communication and setting
In order to communicate with battery BMS, you should set the battery type to “LI” in Program 5. Then the LCD will
switch to Program 36, which is to set the protocol type. There are several protocols in the inverter. Please get
instruction from the supplier to choose which protocol to match the BMS.
Connect the end of RJ45 of battery to BMS communication port of inverter
Make sure the lithium battery BMS port connects to the inverter is Pin to Pin, the inverter BMS port pin assignment
shown as below:
Pin number
BMS port
1
RS485B
2
RS485A
3
--
4
--
5
--
6
--
7
--
8
--

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LCD setting
To connect battery BMS, need to set the battery type as “LI” in Program 05.
After set “LI” in Program 05, it will switch to Program 36 to choose battery type.
There will be 15 options(LI 01,LI 02…LI 15) under Program 36.
05
Battery type
AGM (default)
Flooded
Lithium (only suitable when communicated with BMS)
User-Defined
If “User-Defined” is selected, battery charge voltage and low DC
cut-off voltage can be set up in program 19, 20 and 21.
36
Protocol to communicate
with battery BMS
Protocol 1
Protocol 2
.
.
.
.
.
.
Protocol 15
Note: When the battery type set to Li, the setting option 12, 13, 21 will change to display percent.
Note: When the battery type set as “LI”, the Maximum charge current can't be modified by the user. When the
communication fail, the inverter will cut off output.
12
Setting voltage point back to
utility source when selecting
“SBU priority” or “Solar first” in
program 01
Default 50%, 20%~50% Settable
13
Setting voltage point back to
battery mode when selecting
“SBU priority” or “Solar first” in
program 01
Default 95%, 60%~100% Settable
21
Low DC cut-off voltage.
If self-defined is selected in
program 5, this program can be
set up
Default 20%, 5%~30% Settable

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AC Input/Output Connection
CAUTION: Before connecting to AC input power source, please install a separate AC breaker between
inverter and AC input power source. This will ensure the inverter can be securely disconnected during
maintenance and fully protected from over current of AC input. The recommended spec of AC breaker is 32A
for 3KVA.
CAUTION: There are two terminal blocks with “IN” and “OUT” markings. Please do NOT mis-connect input
and output connectors.
WARNING: All wiring must be performed by a qualified personnel.
WARNING: It’s very important for system safety and efficient operation to use appropriate cable for AC input
connection. To reduce risk of injury, please use the proper recommended cable size as below.
Suggested cable requirement for AC wires
Model
Gauge
Torque Value
SIC-P-M-3T24-IS
12 AWG
1.2~ 1.6 Nm
Please follow below steps to implement AC input/output connection:
1. Before making AC input/output connection, be sure to open DC protector or disconnector first.
2. Remove insulation sleeve 10mm for six conductors. And shorten phase L and neutral conductor N 3 mm.
3. Insert AC input wires according to polarities indicated on terminal block and tighten the terminal screws. Be
sure to connect PE protective conductor first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
WARNING:
Be sure that AC power source is disconnected before attempting to hardwire it to the unit.
4. Then, insert AC output wires according to polarities indicated on terminal block and tighten terminal screws.
Be sure to connect PE protective conductor first.
→Ground (yellow-green)
L→LINE (brown or black)
N→Neutral (blue)
5. Make sure the wires are securely connected.
CAUTION: Important
Be sure to connect AC wires with correct polarity. If L and N wires are connected reversely, it may cause
utility short-circuited.