Offgridtec IC-24/3000/100/80 User manual

Inverter/Charger
User Manual
IC-24/3000/100/80 Ar.Nr.: 1-01-013700
IC-48/5000/80/60 Art.Nr.: 1-01-013705

Contents
Safety Instructions............................................................................. 1
1 General Information ....................................................................... 4
1.1 Overview.................................................................................................. 4
1.2 Identification of parts .............................................................................. 5
1.3 Naming rules............................................................................................ 7
1.4 Connection diagram................................................................................. 8
2 Installation Instructions................................................................ 10
2.1 General installation notes ......................................................................10
2.2 Before installation.................................................................................. 10
2.3 Determine the installation position .......................................................13
2.4 Install the inverter/charger ....................................................................14
2.5 Wiring .................................................................................................... 15
2.6 Operating the inverter/charger..............................................................22
3 Interface ....................................................................................... 23
3.1 Indicator................................................................................................. 23
3.2 Button .................................................................................................... 23
3.3 LCD......................................................................................................... 24
3.4 Operating mode..................................................................................... 26
3.5 Settings .................................................................................................. 31
3.6 Battery voltage customized logic. .......................................................... 41
3.7 Battery discharge current limit .............................................................. 43
4 Protections ................................................................................... 44
5 Troubleshooting ........................................................................... 45
5.1 Faults Reference..................................................................................... 45
5.2 Solutions ................................................................................................ 46
6 Maintenance ................................................................................ 47
7 Specifications................................................................................ 48
Appendix 1 PV open-circuit voltage VSinput power ....................... 51
Appendix 2 Disclaimers ................................................................... 52

1
Safety Instructions
Please reserve this manual for future review.
This manual contains all the instructions for safety, installation, and operation of the IC-24/48 series
inverter/charger (below referred to as the inverter/charger).
1. Explanation of symbols
Please read related literature accompanying the following symbols to enable users to use the product efficiently
and ensure personal and property safety.
The entire system should be installed by professional and technical personnel.
Symbol
Definition
TIP
Indicates any practical advice for reference.
IMPORTANT: Indicates a critical tip during the operation, if ignored, may cause the device to
run in error.
CAUTION: Indicates potential hazards, if not avoided, may cause the device damaged.
WARNING: Indicates the danger of electric shock, if not avoided, would cause casualties.
WARNING HOT SURFACE: Indicates the risk of high temperature, if not avoided, would cause
scalds.
Read the user manual carefully before any operation.
Symbols of the inverter/charger
2. Requirements for professional and technical personnel
Professionally trained;
Familiar with related safety specification for the electrical system;
Read this manual carefully and master related safety cautions.
3. Professional and technical personnel is allowed to do

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Install the inverter/charger to a specified location;
Conduct trial operations for the inverter/charger;
Operate and maintain the inverter/charger.
4. Safety cautions before installation
When you receive the inverter/charger, check whether there is any damage that occurred in transportation.
Contact the transportation company or our company in time for any problem.
When storing or moving the inverter/charger, follow the instructions in the manual.
When installing the inverter/charger, you must evaluate whether the operation area exists any arc danger.
Do not store the inverter/charger where children can touch it.
The inverter/charger is off-grid type. Therefore, the AC output is strictly prohibited from being connected to
the grid; otherwise, the inverter/charger would be damaged.
The inverter/charger is only allowed for stand-alone operation. Connecting multiple units' output in parallel
or series would damage the inverter/charger.
5. Safety cautions for mechanical installation
Before installation, make sure the inverter/charger has no electrical connection.
Ensure the inverter/charger installation's heat dissipation space. Do not install the inverter/charger in humid,
greasy, flammable, explosive, dust accumulative, or other severe environments.
6. Safety cautions for electrical connection
Check if all the wiring connections are tight to avoid the danger of heat accumulation due to a loose
connection.
The protective grounding must be connected to the ground. The cross-section of the wire should not be less
than 4mm2.
A circuit breaker should be used between the battery and the inverter/charger; the circuit breaker's value
should be twice the inverter/charger rated input current.
DO NOT put the inverter/charger close to the flooded lead-acid battery because the terminals' sparkle may
ignite the hydrogen released by the battery.
The AC output port is only connected to the load. Therefore, it is strictly forbidden to connect other power
sources or utilities. Otherwise, the damage will be caused to the inverter/charger. Also, turn off the
inverter/charger before any installation.
Both utility input and AC output are of high voltage, do not touch the wiring connection to avoid electric
shock.
7. Safety cautions for inverter/charger operation:
When the inverter/charger is working, its heat sink and casing will generate a lot of heat; the temperature
would be very high. Please do not touch it.
When the inverter/charger is working, please do not open the inverter/charger cabinet to operate.

3
When eliminating the faults or disconnecting the DC input, turning off the inverter/charger's switch, then
carry out the operation after the LCD screen is completely OFF.
8. The dangerous operations which would cause electric arc, fire, or explosion:
Touch the wire end that hasn't been insulation treated and maybe electriferous.
Touch the wiring copper row or internal devices that may be electriferous.
The power cable connection is loose.
Screw or other spare parts inadvertently falls into the inverter/charger.
Incorrect operations are carried by untrained non-professional, or technical personnel.
WARNING
Once an accident occurs, it must be handled by professional and technical personnel.
Improper operations would cause more serious accidents.
9. Safety cautions for stopping the inverter/charger
Firstly turn off the breakers on the utility input side and AC output side, then turn off the DC switch;
After the inverter/charger stops for ten minutes, the internal conductive devices could be touched;
The inverter/charger can be restarted after removing the faults which may affect its safety performance;
No maintenance parts in the inverter/charger. If any maintenance service is required, please contact our
after-sales service personnel.
WARNING
Do NOT touch or open the shell after the inverter is powered off within ten minutes.
10. Safety cautions for inverter/charger maintenance：
Testing equipment is recommended to check the inverter/charger to make sure there is no voltage or
current;
When conducting electrical connection and maintenance work, must post temporary warning sign or put up
barriers to prevent unrelated personnel from entering the electrical connection or maintenance area;
Improper maintenance operation to the inverter/charger may cause personal injury or equipment damage;
Wear an antistatic wrist strap, or avoid unnecessary contact with the circuit board.
CAUTION
The safety mark, warning label, and nameplate on the inverter/charger should be visible, not
removed, or covered.

4
1 General Information
1.1 Overview
IC-24/48 Series, an hybrid inverter charger, supports utility charging, oil generator charging, solar charging, utility
output, inverter output, and energy management. The DSP chip in the product with an advanced control
algorithm brings high response speed and high conversion efficiency. In addition, this product adopts an industrial
design to ensure high reliability and features multiple charging and output modes.
The new optimized MPPT charging technology fastly tracks the solar panels' max power point in any situation and
obtains the maximum energy in real-time.
The AC to DC charging process adopts the advanced control algorithm to realize a full digital PFC and dual
closed-loop control of voltage and current. As a result, the DC output charging voltage and current are
continuously adjustable within a specific range.
The DC to AC inverting process, based on a fully smart digital design, adopts advanced SPWM technology to get a
pure sine wave output. The inverting process converts the DC power to AC power, suitable for household
appliances, power tools, industrial equipment, audio systems, and other electronics.
The 4.2-inch LCD shows the operational status and full parameters.
To maximize solar energy utilization, users can choose energy sources according to actual needs and flexibly take
the utility as a supplement. This inverter charger can increase the system's power supply guarantee rate, which is
suitable for solar energy, utility/oil generator hybrid systems. It aims to provide users with high-quality,
high-stability, and high-reliability electrical energy.
Features
Full intelligent digital energy storage equipment
Supports the battery mode or non-battery mode
Non-battery mode: charging with solar (Main) and utility (Assist) simultaneously
(Optional) Surge and reverse connection protections to support the lithium battery system perfectly
Advanced SPWM technology and pure sine wave output
PFC technology achieves a high-power factor of AC to DC charging and reduces grid capacity usage
Full digital double closed-loop control
High tracking efficiency of MPPT no less than 99.5%
Three charging modes: Solar only, Solar priority, Utility & Solar
Two AC output modes: Utility priority and Inverter priority
Self-learning SOC display function
Multiple LED indicators to dynamic display the status

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AC OUT button to control the AC output directly
4.2 inch LCD to monitor and modify system parameters
Remote temperature compensation for batteries
Optional WiFi or GPRS Remote control by the RS485 isolated com. port
Optional BMS-Link port, taking the charging and discharging control from BMS
Customized charging current and discharging limited current
Supports cold start and soft start
Comprehensive electronic protection features
1.2 Identification of parts

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❶
AC-IN / Utility input terminal
❿
RTS interface
❷
AC output terminal
⓫
Dry contact interface
②
❸
Terminal covers
⓬
RBVS interface
❹
Mounting holes (4 Total)
⓭
Cable hole
❺
Battery negative input terminal
⓮RS485 interface(DB9 female, with
isolation design)
③
5VDC/200mA
❻
Battery positive input terminal
❼
PV input terminal (MC4)
⓯
LCD
❽
External cover
⓰
Power switch
❾BMS-Link connection port(RJ45, without
isolation design)
①
5VDC/200mA
⓱Utility overcurrent protector
①BMS-Link connection port（RJ45）
Function：
Through a BMS-Link converter, different lithium battery manufacturers' BMS protocols can be converted into our
company's standard BMS protocol. In addition, it realizes the communication between the inverter/charger and
the BMS.
RJ45 pin definition：
Pin
Definition
Pin
Definition
1 +5VDC 5 RS485-A
2
+5VDC
6
RS485-A
3
RS485-B
7
GND
4
RS485-B
8
GND

7
CAUTION
Please refer to the "BMS Lithium Battery Protocols & Fixed ID Table" or contact our
technical supporters for the currently supported BMS manufacturers and the BMS
parameters.
②Dry contact interface
Working principle:
When the battery voltage reaches the dry contact ON voltage (DON), the dry contact is connected. Its coil is
energized. The dry contact can drive resistive loads of no more than 125VAC /1A, 30VDC/1A. According to
different battery types of the inverter charger, the default values of the dry contact ON (DON) voltage and the dry
contact OFF (DOF) voltage are different. Please refer to the chapter 3.5 Settings > item 19 DON and item 20 DOF
for details.
③RS485 interface（DB9 female）
DB9 pin definition for RTU-type IC-24/48 series:
Pin
Definition
Pin
Definition
1-2
NC
6
NC
3 +12VDC 7 RS485-A
4 GND2(+12VDC power ground) 8 RS485-B
5
GND1(+5VDC power ground)
9
+5VDC
DB9 pin definition for other type IC-24/48 series:
Pin
Definition
Pin
Definition
1-4 NC 7 RS485-A
5
GND
8
RS485-B
6 NC 9 +5VDC

8
1.3 Connection diagram
No battery mode
Battery mode

9
Supported battery types：AGM、GEL、FLD、LiFePO4
WARNING
AC loads shall be determined according to the output power of the inverter/charger. The
load exceeding the maximum output power may damage the inverter/charger.
CAUTION
For different battery types, confirm the relevant parameters before power on.
No-battery mode and battery mode can set by setting item 0.

10
2 Installation Instructions
2.1 General installation notes
•Read all the installation instructions carefully in the manual before installation.
•Be very careful when installing the batteries. Please wear eye protection when installing the open-type
lead-acid battery, and rinse with clean water in time for battery acid contact.
•Keep the battery away from any metal objects, which may cause a short circuit of the battery.
•Acid gas may be generated when the battery is charged. Ensure that the surrounding environment is well
ventilated.
•The inverter/charger requires enough clearance above and below for proper airflow. Do not install the
inverter/charger and the lead-acid liquid battery in the same cabinet to avoid the batteries' acid gas from
corroding the inverter/charger.
•Only charge the batteries within the control range of this inverter/charger.
•Loose power connections and corroded wires may result in high heat that can melt wire insulation, burn
surrounding materials, or even cause a fire. Ensure tight connections and secure cables with clamps to
prevent them from swaying while moving the inverter/charger.
•Select the system cables according to the current density of not more than 3.5A/mm2(according to the
National Electrical Code Article 690 NFPA70.)
•Avoid direct sunlight and rain infiltration when installing it outdoor.
•After turn off the power switch, there is still high voltage inside the inverter/charger. Therefore, do not open
or touch the internal components and perform related operations after the capacitor's total discharge.
•Do not install the inverter/charger in a harsh environment such as humid, greasy, flammable, explosive, or
dust accumulation.
•The DC input terminal is equipped with reverse polarity protection. Therefore, the reverse connection of the
DC input terminal will not cause fatal damage to the product. However, it is strongly recommended to
connect the inverter/charger with the PV array and utility after normal running.
•Both utility input and AC output are of high voltage, do not touch the wiring connection to avoid electric
shock.
•To prevent injury, do not touch the fan while it is working.
2.2 Before installation
2.2.1 Check the pack list
•Inverter/charger 1 pcs
•User manual 1ps

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•Included accessories 1pcs (Details refer to the "Accessories list" file shipped with the inverter/charger.)
2.2.2 Prepare modules
1) Battery
Recommended wire size of the battery and the circuit breaker is as below.
Model
Battery wire size
Circuit breaker
Ring terminal
UP3000-HM10022
35mm
2
/1AWG
2P—200A
RNB38-8S
UP5000-HM8042
35mm
2
/1AWG
2P—200A
RNB38-8S
Making the battery connection wire
Step1: Ring terminal 2pcs (included accessories).
Step2: Battery positive and negative connection wires 2 pcs(red +, black -). The wire length is determined
according to the customer's actual requirement.
Step3: Strip one end of the battery connection wire for about d mm (size d is determined according to the ring
terminal).
Step4: Pass the exposed wire through the ring terminal, and secure the wire firmly with a wire clamp.
2) AC Load
Recommended wire size of the AC load and the circuit breaker is as below.
Model
Load wire size
Circuit breaker
Torque
IC-24/3000/100/80
4mm
2
/11AWG
2P—25A
1.2N.M
IC-48/5000/80/60
6mm
2
/9AWG
2P—40A
1.2N.M
Making the connection wire of the AC load:
Strip the AC load connection wires (3 pcs) for about 10 mm.
Symbols
Abbreviation
Name
Color
L
LINE
Live wire
Brown/black
N
Neutral
Neutral line
Blue
— Ground line Yellowish green
3) PV modules
Recommended wire size of the PV module and the circuit breaker is as below.

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Since the PV array's output current varies with the type, connection method, or sunlight angle, its minimum wire
size can be calculated by the short circuit current(ISC). Please refer to the ISC value in the PV module's
specifications. When the PV modules are connected in series, the total ISC equals any PV module's ISC. When the
PV modules are connected in parallel, the total ISC equals all PV modules' ISC. Please refer to the table below:
Model
PV wire size
Circuit breaker
IC-24/3000/100/80
6mm
2
/9AWG
2P—40A
IC-48/5000/80/60
6mm
2
/9AWG
2P—40A
Making the connection wire of the PV module:
Step1: Each MC4 male terminal and female terminal 1pcs(included accessories)
Step2: PV module positive and negative connection wires 2 pcs(red +, black -). The wire length is determined
according to the customer's actual requirement.
Step3: Strip one end of the PV module positive wire for about 5mm, and press the exposed wire to the inner core
of the MC4 male terminal, as shown below:
Step4: Tight press the copper wire and the MC4 male terminal's inner core with a plier and ensure the connection
is secure.
Step5: Unscrew the nut of the MC4 male terminal, insert the inner core into the MC4 terminal, and screw the nut.
Step6: Strip one end of the PV module negative wire for about 5mm, and press the exposed wire to the inner core
of the MC4 female head, as shown below:
Step7: Tight press the copper wire and the MC4 female head's inner core with a plier and ensure the connection
is secure.
Step8: Unscrew the nut of the MC4 female terminal, insert the inner core into the MC4 terminal, and screw the
nut.
4) Utility input
Recommended wire size of the utility input and the circuit breaker is as below.
Model
Utility wire size
Circuit breaker
Torque

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IC-24/3000/100/80
4mm
2
/11AWG
2P—25A
1.2N.M
IC-48/5000/80/60
6mm
2
/9AWG
2P—40A
1.2N.M
Making the connection cable of the utility input:
Strip two connection wires of the utility input for about 10 mm.
Symbols
Abbreviation
Name
Color
L
LINE
Live wire
Brown/black
N
Neutral
Neutral line
Blue
2.3 Determine the installation position
Step1: Remove mounting plate 1 and mounting plate 2 behind the inverter/charger with a screwdriver.
Step2: Mark the installation position with the mounting plate 1. The distance between the two mounting holes is
300mm.
Step3: Rotate the direction of mounting plate 1 and plate 2, install them again.

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2.4 Install the inverter/charger
WARNING
Risk of explosion! Never install the inverter/charger in a sealed enclose with flooded
batteries! Do not install the inverter/charger in a confined area where the battery gas can
accumulate.
CAUTION
The inverter/charger can be fixed to the concrete and solid brick walls and cannot be
fixed to the hollow brick wall.
The inverter/charger requires at least 20cm of clearance right and left and 50cm of
clearance above and below.
Step1: Determine the installation location and heat-dissipation space. The
inverter/charger requires at least 20cm of clearance right and left
and 50cm of clearance above and below.
Step2: According to the installation position marked with the mounting plate 1, drill two M10 holes with an
electric drill.
Step3: Insert the screws of the M8 bolts and the steel pipes into the two M10 holes.
Step4: Install the inverter/charger and determine the installation position of the M10 hole (located at the bottom
of the inverter/charge).
Step5: Remove the inverter/charger and drill an M10 hole according to the position determined in step4.
Step6: Insert the screw of the M8 bolt and the steel pipe into the M10 hole.
Step7: Install the inverter/charger and secure the nuts with a sleeve.

15
2.5 Wiring
1) Remove the terminal cover
Remove covers of the AC output /AC input/utility input terminal with a screwdriver, as shown below:
2) Remove the inverter/charger cover
Remove the screws beside the inverter/charger with a screwdriver, as shown below:

16
3) Connect the battery
WARNING
A circuit breaker must be installed on the battery side. For selection, please refer to chapter
"2.2.2 Prepare modules ".
CAUTION
When wiring the battery, please do not close the circuit breaker and ensure that the
leads of "+" and "-" poles are connected correctly.
A circuit breaker current is 1.25 to 2 times the rated current must be installed on the
battery side away from the battery not longer than 200mm.
Connection sequence of the battery
Step1: Remove the screw of the inverter/charger positive terminal with a sleeve, the torque of which is 3.5N.M.
Step2: Connect the ring terminal of the battery connection wire to the inverter/charger's positive terminal.
Step3: Install the screw and secure it with the sleeve.
Step4: Connect and secure the negative terminal of the inverter/charger following the step1~step3.
4) Connect the AC load
WARNING
Risk of electric shock! When wiring the AC load, please do not close the circuit breaker
and ensure that the poles leads are connected correctly.
If utility input exists, the inverter/charger must be connected to the ground terminal.
We do not assume any responsibility for the unnecessary danger when the ground
terminal is not connected correctly.
Silk-screen
Abbreviation
Name
Color
L
LINE
Live wire
Brown/black
N
Neutral
Neutral line
Blue
—
Ground line
Yellowish-green

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5) Connect the PV modules
WARNING
Risk of electric shock! When wiring the PV modules, please do not close the circuit breaker
and ensure that the leads of "+" and "-" poles are connected correctly.
CAUTION
If the inverter/charger is used in an area with frequent lightning strikes, installing an external
surge arrester is recommended.
6) Connect the utility input
WARNING
Risk of electric shock! When wiring the utility input, please do not close the circuit breaker
and ensure that the poles' leads are connected correctly.

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Silk-screen
Abbreviation
Name
Color
L
LINE
Live wire
Brown/black
N
Neutral
Neutral line
Blue
7) Connect accessories
A. RBVS interface
Function：
This interface can be connected to the battery voltage sampling wire to detect the battery voltage accurately. The
sampling distance is no longer than 20 meters.
Needs:
3.81-2P terminal 1 pcs
Positive and negative(red+, black-) wire 1 pcs each (determine the length and wire size of the connecting wire
according to the customer's actual needs.)
Making the RBVS wire:
One end of the positive and negative wire is connected to the 3.81-2P terminal. The other end is connected to the
positive and negative terminals of the battery.
CAUTION
When connecting the RBVS wire, ensure the positive and negative poles (red +, black -).