EDECOA Hybrid Inverter / Charger User Manual

Models: EG-624B, EG-422B

About This Manual

This manual details the assembly, installation, operation, and troubleshooting of the EDECOA Hybrid Inverter/Charger. It also provides essential safety and installation guidelines, along with information on necessary tools and wiring. Please read this manual carefully before installation and operation. Keep this manual for future reference.

Safety Instructions

WARNING: This chapter contains important safety and operation instructions. Read and keep this manual for future reference.

Before using the unit, read all instructions and cautionary markings on the unit, the batteries, and all appropriate sections of this manual.
CAUTION -- To avoid danger, charge only deep-cycle lead acid-type rechargeable batteries. Charging other types of batteries may cause personal injury and damage.
Do not disassemble the unit. Take it to a qualified service center when service or repair is required. Incorrect re-assembly may result in electric shock or fire. If you need to use other types of batteries, contact after-sales service for guidance.
Disconnect all wiring before attempting any maintenance or cleaning to reduce the risk of electric shock.
CAUTION - Only qualified personnel should install this device with a battery.
NEVER charge a frozen battery.
For optimum operation of this inverter/charger, follow the required specifications to select the appropriate cable size. Correct operation of this inverter/charger is very important.
Be cautious when working with metal tools on or around batteries. There is a potential risk of dropping a tool, causing a spark or short-circuiting batteries or other electrical parts, which could cause an explosion.
Please strictly follow the installation procedure when disconnecting AC or DC terminals. Refer to the INSTALLATION section of this manual for details.
GROUNDING INSTRUCTIONS - This inverter/charger should be connected to a permanent grounded wiring system. Ensure compliance with local requirements and regulations for installation.
NEVER cause AC output or DC input to short-circuit. Do NOT connect to utility when DC input is short-circuited.
Warning!! Only qualified service persons are allowed to service this device. If errors persist after following the troubleshooting table, send this inverter/charger back to the local dealer or service center for maintenance.

Introduction

This is a multi-function inverter/charger, combining the functions of an inverter, solar charger, and battery charger to provide uninterruptible power support. The LCD display offers user-configurable settings and easy-accessible button operations.

Features

Pure sine wave inverter
Configurable input voltage range for home appliances and personal computers via LCD setting
Configurable battery charging current based on applications via LCD setting
Configurable AC/Solar Charger priority via LCD setting
Compatible with mains voltage or generator power
Auto restart while AC recovery
Overload/Over-temperature/Short-circuit protection
Smart battery charger design for optimized battery performance
Cold start function

Basic System Architecture

The following illustration shows the basic application for this inverter/charger. It includes the following devices for a functional system:

Generator or Utility
PV modules

Consult with your system integrator for other possible system architectures depending on your requirements.

This inverter can power all kinds of appliances at home or in an office environment, including motor-type appliances such as fans, refrigerators, and air conditioners.

Figure 1: Hybrid Power System Diagram showing connections between Utility/Generator, PV modules, the Hybrid Inverter/Charger, and external Battery packs, leading to Home Appliances.

Operation

Power ON/OFF

Once the unit has been properly installed and the batteries are connected, press the ON/OFF switch (located on the side of the case) to turn on the inverter.

Operation and Display Panel

The operation and display panel is located on the front panel of the inverter. It includes three indicators, four function keys, and one LCD screen that displays operating status and input/output power information.

Diagram of the front panel display showing various icons and digital readouts for power, voltage, frequency, temperature, and status indicators (AC/INV, CHG, FAULT).

LED Indicator

LED Indicator	Color	Status	Messages
AC / INV	Green	ON	Output is powered by utility in Line mode.
		Flashing	Output is powered by battery or PV in battery mode.
CHG	Green	ON	Battery is fully charged.
		Flashing	Battery is charging.
FAULT	Red	ON	Fault occurs in the inverter.
		Flashing	Warning condition occurs in the inverter.

Function Keys

Function Key	Description
[ESC]	Exit setting mode
[UP]	Go to previous selection
[DOWN]	Go to next selection
[ENTER]	Confirm the selection in setting mode or enter setting mode

LCD Display Icons

Diagram illustrating various icons used on the LCD display, representing AC input, PV input, battery, load, overload, fault, charging, and inverter/AC status.

Input Source Information

Indication	Description
[Power Tower Icon]	Indicates the AC input.
[Sun/Solar Panel Icon]	Indicates the PV input.
Digital Readouts	Indicate input voltage, input frequency, PV voltage, battery voltage, and charger current.

Configuration Program and Fault Information

Indication	Description
[Gear Icon]	Indicates the setting programs.
[Lightning Bolt Icon]	Indicates the warning and fault codes.
Warning: [0000]	Warning code.
Fault: [0000]	Fault with code.

Output Information

Indication	Description
Digital Readouts	Indicate output voltage, output frequency, load percentage, load in VA, load in Watt, and discharging current.

Battery Information

Indication	Description
[Battery Icon]	Indicates battery status.
L1	Indicates battery connection status.

Load Information

Indication	Description
[House Icon with Wi-Fi Symbol]	Indicates the load.
[Overload Text]	Indicates overload.

Mode Operation Information

Indication	Description
[Power Tower Icon]	Unit connected to the utility.
AC BYPASS	Load is supplied by utility power.

LCD Setting

After pressing and holding the ENTER button for 3 seconds, the unit will enter setting mode. Press the UP or DOWN button to select setting programs. Then press the ENTER button to confirm the selection or the ESC button to exit.

Setting Programs

Program	Description	Available Option(s)	Default
[ESC]	Exit setting mode
[Reset Icon]	Restore all programs to default.
01	Output source priority: To configure load power source priority	Solar first (Default): Solar energy provides power to the loads as priority. If solar energy is not sufficient to power all connected loads, utility energy will supplement. Battery provides power to the loads only under either of the following conditions: - Solar energy and utility are both not available. - Solar energy is not sufficient and utility is not available. Solar + Utility: Solar energy provides power to the loads as first priority. If solar energy is not sufficient to power all connected loads, battery energy will supply power to the loads at the same time. Utility provides power to the load only when battery voltage drops to either low-level warning voltage or the setting point in program 12. Solar $ ightarrow$ Battery $ ightarrow$ Utility: When solar power is available, priority sequence is Solar $ ightarrow$ Battery $ ightarrow$ Utility. When solar power is not available, priority sequence is Utility $ ightarrow$ Battery, while battery is the backup power source. Utility first: Utility provides power to the loads as the first priority. Solar and battery will provide power when utility is not available.
02	Maximum charging current: To configure total charging current for solar and utility chargers. (Max. charging current = utility charging current + solar charging current)	10A - 60A
03	AC input voltage range	Appliances (default) AC input voltage range becomes within 90-280 VAC. UPS AC input voltage range becomes within 170-280 VAC.
05	Battery type	AGM (default) Flooded ACn Flooded FLd Flooded User-Defined (USE) If "User-Defined" is selected, battery charging voltage and low DC cut-off voltage can be set up in programs 26, 27 and 29. LI b When the solar energy or utility are available, set this item to LIB, the lithium battery will be activated in 3 seconds. LIC If selected, Lithium battery communication connection is specified for PACE 232 BMS. Lithium battery activation function is automatically enabled. LIP If selected, Lithium battery communication connection is specified for PACE 485 BMS. Lithium battery activation function is automatically enabled. LIL If selected, Lithium battery communication connection is specified for PYLON 485 BMS. Lithium battery activation function is automatically enabled.
06	Auto restart when overload occurs	Restart disabled (default) Restart enabled
07	Auto restart when over temperature occurs	Restart disabled (default) Restart enabled
09	Output frequency	50 Hz (default) 60 Hz
10	Output voltage	220V 230V (Default) 240V
11	Maximum utility charging current	2A (Minimum) - 30A (Default) - 100A (Maximum)
12	Setting voltage point back to utility source when selecting "SBU priority" or "Solar first" in program 01.	EG-422B: default is 23.0V, range from 22.0V to 25.5V. EG-624B: default is 46.0V, range from 42.0V to 51.0V.
13	When SBU in program 01 and LIP or LIL in program 05 are selected, you can set the battery level where power supply will be switched to utility.	5% (Minimum) - 95% (Maximum)	When battery level is lower than this value, inverter will automatically switch back to the utility (if the utility access has a delay, it will be switched to the utility after the delay).
14	Setting voltage point back to battery mode when selecting "SBU priority" or "Solar first" in program 01.	EG-422B: Minimum 24.0V, Default 27.0V, Maximum 29.2V. EG-624B: Minimum 48.0V, Default 54.0V, Maximum 58.4V.	When battery level is higher than this value, inverter will switch to battery mode automatically.
15	Charger source priority	Solar and Utility: Solar energy and utility will charge battery at the same time. Solar first: Solar energy will charge battery as priority. Utility will charge battery only when solar energy is not available. Only Solar: Solar energy will be the only supplying source of energy regardless of utility availability. If this inverter/charger is in Battery mode or Power saving mode, only solar energy is available for battery charging. Solar energy will charge battery if it's available and sufficient.
18	Alarm control	Alarm on (default) Alarm OFF
13	Automatically return to default display screen	Return to default display screen (default) Stay at previous screen	If selected, no matter how users switch display screen, it will automatically return to default display screen (Input voltage / output voltage) in 1 minute after no button is pressed. If selected, the display screen will stay at previous screen the user finally switches.
20	Backlight control	Backlight on (default) Backlight OFF
22	Beeps while primary source is interrupted	Alarm ON (default) Alarm OFF
23	Overload bypass: When enabled, the unit will transfer to line mode if overload occurs in battery mode.	Bypass disabled (default) Bypass enabled
25	Record Fault code	Record enabled (default) Record disabled
26	Bulk charging voltage (C.V voltage)	EG-422B default setting: 28.2V EG-624B default setting: 56.4V Only when self-defined is selected in Program 5 will this program become available. Setting range is from 24.0V to 29.2V for EG-422B, 48.0V to 58.4V for EG-624B. Increment of each click is 0.1V.
27	Floating charging voltage	24V model default setting: 27V 48V model default setting: 54V Only when self-defined is selected in program 5, this program can be set up. Setting range is from 24.0V to 29.2V for EG-422B, 48.0V to 58.4V for EG-624B. Increment of each click is 0.1V.
29	Low DC cut-off voltage	EG-422B default setting: 20.0V EG-624B default setting: 40.0V
30	Battery equalization	Only when "Flooded" or "User-Defined" is selected in program 05 will this program become available.
31	Battery equalization voltage	EG-422B: Setting range is from 25.0V to 31.5V. Increment of each click is 0.1V. EG-624B: Setting range is from 48.0V to 61.0V. Increment of each click is 0.1V.
33	Battery equalization time	60 min (default)
34	Battery equalization timeout	120 min (default)
35	Equalization interval	30 days (default)
36	Activate equalization immediately	Enable Disable (default)	Only when equalization function is enabled in program 30 will this program be available. If "Enable" is selected, it activates battery equalization immediately and the LCD main page will show "E9". If "Disable" is selected, it cancels the equalization function until the next activated equalization time arrives based on program 35 setting. At this time, "E9" will not be shown on the LCD main page.
37	Grid-tie operation	[Sun Icon] Inverter in off-grid mode. No energy is fed to grid. [Sun Icon + Power Tower Icon] Inverter in on-grid mode. Solar system provides power to the loads as first priority, to battery charging as second priority, and extra energy will be fed to the grid.
38	Grid-tie current	Limitation of current fed into the grid. Increment of each click is 2A.
39	LED pattern lights	LED lights ON (default) LED lights OFF
41	Dual output	Disabled (default) Enabled
42	Voltage points where inverter switches to dual output	For EG-422B: 220V (Setting range is from 20.0V to 26.0V) For EG-624B: 440V (Setting range is from 40.0V to 52.0V). This program only works when program 41 was set to Enabled. When battery voltage is lower than the setting value, the main output will be cut off and the secondary output will still work. Note: Default maximum secondary output is only 33% of the full load, which is 1400W for EG-422B and 2067W for EG-624B.
43	BMS communication address 48-70	If program 05 is in LIL mode, you can change the mailing address. The corresponding address of 48 is 02, for 49 it is 12, etc.

Display Setting

The LCD display information will be switched in turns by pressing the UP or DOWN key. The information display is switched in the following order: input voltage, input frequency, PV voltage, charging current, PV power, battery voltage, output voltage, output frequency, load percentage, load in Watt, load in VA, DC discharging current, CPU Version.

Information Display	LCD Display Example
Input AC voltage = 222V PV voltage = 168V Battery voltage = 25V Output voltage = 222V Load = 188W CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC input 222V, PV input 168V, Battery 25V, Output 222V, Load 188W. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Input AC voltage = 222V PV current = 2.3A Battery current = 20A Output voltage = 224V Load = 188VA CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC input 222V, PV current 2.3A, Battery current 20A, Output 224V, Load 188VA. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Input AC voltage = 223V PV NTC temperature = 71.0°C Battery voltage = 25V INV NTC temperature = 35.0°C Load percentage = 12% CHG - Flashing INV/AC - ON Input AC frequency = 50.0 Hz PV power = 0.434 kWh Battery current = 20A Output frequency = 50.0 Hz Load = 188W CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC input 223V, PV temp 71.0°C, Battery 25V, INV temp 35.0°C, Load % 12%. Status indicators CHG (flashing) and INV/AC (ON) are shown. Also shows AC frequency 50.0 Hz, PV power 0.434 kWh, Battery current 20A, Output frequency 50.0 Hz, Load 188W.
Battery is being charged and load is more than 1 kW. Input AC voltage = 222V PV voltage = 168V Battery voltage = 25V Output voltage = 232V Load = 1.18 kW CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC input 222V, PV input 168V, Battery 25V, Output 232V, Load 1.18 kW. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Input AC voltage = 224V PV current = 2.3A Battery current = 12.5A Output voltage = 222V Load = 1.88 kVA CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC input 224V, PV current 2.3A, Battery current 12.5A, Output 222V, Load 1.88 kVA. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Input AC voltage = 223V PV NTC temperature = 71.0°C Battery voltage = 25V INV NTC temperature = 35.0°C Load percentage = 82% CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC input 223V, PV temp 71.0°C, Battery 25V, INV temp 35.0°C, Load % 82%. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Input AC frequency = 50.0 Hz PV power = 0.434 kWh Battery current = 20A Output frequency = 50.0 Hz Load = 1.88 kW CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC frequency 50.0 Hz, PV power 0.434 kWh, Battery current 20A, Output frequency 50.0 Hz, Load 1.88 kW. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Battery is discharging and the load is less than 1 kW. Input AC voltage = 0V PV voltage = 0V Battery voltage = 25V Output voltage = 222V Load = 188W CHG - Flashing INV/AC - ON	Diagram showing no AC input, no PV input, inverter, battery, and load with corresponding values: Battery 25V, Output 222V, Load 188W. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Input AC voltage = 0V PV current = 0A Battery current = 12.5A Output voltage = 222V Load = 188VA CHG - Flashing INV/AC - ON	Diagram showing no AC input, no PV input, inverter, battery, and load with corresponding values: Battery current 12.5A, Output 222V, Load 188VA. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Input AC voltage = 0V PV NTC temperature = 36.0°C Battery voltage = 24V INV NTC temperature = 60.0°C Load percentage = 13% CHG - Flashing INV/AC - ON Input AC frequency = 0 Hz PV power = 0 kWh Battery current = 20A Output frequency = 50.0 Hz Load = 188W CHG - Flashing INV/AC - ON	Diagram showing no AC input, no PV input, inverter, battery, and load with corresponding values: PV temp 36.0°C, Battery 24V, INV temp 60.0°C, Load % 13%. Status indicators CHG (flashing) and INV/AC (ON) are shown. Also shows AC frequency 0 Hz, PV power 0 kWh, Battery current 20A, Output frequency 50.0 Hz, Load 188W.

Operating Mode Description

Operation Description	LCD Display Mode
Standby mode Input AC voltage = 222V PV voltage = 210V Battery voltage = 25V Output voltage = 0V Load = 0W CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC input 222V, PV input 210V, Battery 25V, Output 0V, Load 0W. Status indicators CHG (flashing) and INV/AC (ON) are shown. Note: The inverter is not turned on yet, but at this time, the inverter can charge the battery without AC output.
Input AC voltage = 223V PV voltage = 0V Battery voltage = 25V Output voltage = 0V Load = 0W CHG - Flashing INV/AC - ON	Diagram showing AC input, no PV input, inverter, battery, and load with corresponding values: AC input 223V, Battery 25V, Output 0V, Load 0W. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Input AC voltage = 0V PV voltage = 210V Battery voltage = 25V Output voltage = 0V Load = 0W CHG - Flashing	Diagram showing no AC input, PV input, inverter, battery, and load with corresponding values: PV input 210V, Battery 25V, Output 0V, Load 0W. Status indicator CHG (flashing) is shown.
Line Mode Input AC voltage = 224V PV current = 8.6A Battery current = 25A Output voltage = 222V Load = 1.88 kVA CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC input 224V, PV current 8.6A, Battery current 25A, Output 222V, Load 1.88 kVA. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Input AC voltage = 224V PV voltage = 0V Battery voltage = 25V Output voltage = 222V Load = 188W CHG - Flashing INV/AC - ON	Diagram showing AC input, no PV input, inverter, battery, and load with corresponding values: AC input 224V, Battery 25V, Output 222V, Load 188W. Status indicators CHG (flashing) and INV/AC (ON) are shown.
Grid-tie Operation Input AC voltage = 224V PV current = 8.6A Battery current = 25A Output voltage = 222V Load = 1.88 kVA CHG - Flashing INV/AC - ON	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values: AC input 224V, PV current 8.6A, Battery current 25A, Output 222V, Load 1.88 kVA. Status indicators CHG (flashing) and INV/AC (ON) are shown. When working in grid-tie mode, the utility icon will flash every 3 seconds.
Battery Mode Input AC voltage = 0V PV voltage = 180V Battery voltage = 25V Output voltage = 230V Load = 388W INV/AC - Flashing	Diagram showing no AC input, PV input, inverter, battery, and load with corresponding values: PV input 180V, Battery 25V, Output 230V, Load 388W. Status indicator INV/AC (flashing) is shown.
Input AC voltage = 0V PV voltage = 180V Battery voltage = 25V Output voltage = 230V Load = 388W CHG - Flashing INV/AC - Flashing	Diagram showing no AC input, PV input, inverter, battery, and load with corresponding values: PV input 180V, Battery 25V, Output 230V, Load 388W. Status indicators CHG (flashing) and INV/AC (flashing) are shown.
Lithium Battery Information Connection of Lithium battery is the same as Battery Connection. Please read the following direction of connection of BMS. 1. Before connecting, make sure that the lithium battery and inverter are turned off. (It is recommended to install a circuit breaker for the power cables of the lithium battery and the inverter battery interface.) 2. The RJ45 connector of the communication cable connects to the BMS port of the inverter, and the other RJ45 connector connects to the RS485 port of the lithium battery. 3. You will find two types of connector as were shown on the left. The top one is the RJ45 to be connected to the BMS port on the battery. The bottom one is the RJ45 to be connected to the BMS port on the inverter.	Image showing two RJ45 connectors, one labeled for BMS port on battery, the other for BMS port on inverter.
Description LCD display LIC (Lithium battery communication connection PACE 232 BMS)	Diagram showing AC input, PV input, inverter, battery, and load with corresponding values for Lithium Battery Connection (PACE 232 BMS): Total battery voltage = 52.4V, Battery remaining capacity = 23%. Battery charging current = 0A, Battery discharging current = 1A. Nominal battery voltage = 48V, Total battery capacity = 100Ah. Battery remaining capacity = 23%, Battery charge cycles = 8. Battery ambient temperature = 28.2°C, Battery MOS temperature = 28.9°C. Voltage of one single battery cell = 3.27V, Temperature of one single battery cell = 28.5°C. Diagram showing AC input, PV input, inverter, battery, and load with corresponding values for Lithium Battery Connection (PACE 485 BMS): Total battery voltage = 25.9V, Battery remaining capacity = 11%. Battery charging current = 0A, Battery discharging current = 1A. Battery charge cycles = 12, Rated battery capacity = 100Ah. Minimum MOS temperature of battery = 28.2°C, Maximum MOS temperature of battery = 28.9°C. Maximum voltage of one single battery cell = 3.24V, Minimum voltage of one single battery cell = 3.24V. Maximum temperature of one single battery cell = 32.8°C, Minimum temperature of one single battery cell = 31.5°C. Diagram showing AC input, PV input, inverter, battery, and load with corresponding values for Lithium Battery Connection (PYLON 485 BMS): Total battery voltage = 48.9V, Battery remaining capacity = 11%. Battery charging current = 0A. Rate battery voltage = 48V, Battery charge cycles = 12. Maximum voltage of one single battery cell = 3.24V, Minimum voltage of one single battery cell = 3.24V. Minimum temperature of battery cells = 29.4°C, Maximum temperature of battery cells = 44.5°C. Minimum MOS temperature of battery = 32.8°C, Maximum MOS temperature of battery = 31.5°C.

Battery Equalization Description

Equalization function reverses the buildup of negative chemical effects like stratification, a condition where acid concentration is greater at the bottom of the battery than at the top. This condition - sulfation - will reduce the overall capacity of the battery. Therefore, it's recommended to equalize the battery periodically. Equalization also helps to remove sulfate crystals that might have built up on the plates.

How to Apply Equalization Function

Enable the battery equalization function in monitoring LCD setting program 33 first. Then apply this function in the device by either one of the following methods:

Setting equalization interval in program 34.
Active equalization immediately in program 39.

When to Equalize

In the float stage, when the setting equalization interval (battery equalization cycle) arrives, or equalization is active immediately, the controller will start to enter the Equalize stage.

Diagram illustrating battery charging stages: Bulk (Constant Current), Absorption (Constant Voltage), Float, and Equalize. Shows voltage and current curves during these stages.

Equalize charging time and time-out

In the Equalize stage, the controller will supply power to charge the battery as much as possible until the battery voltage raises to the battery equalization voltage. Then, constant-voltage regulation is applied to maintain the battery voltage at the battery equalization voltage. The battery will remain in the Equalize stage until the setting battery equalized time is arrived.

However, in the Equalize stage, when the battery equalized time is expired and the battery voltage doesn't rise to the battery equalization voltage point, the charge controller will extend the battery equalized time until the battery voltage achieves the battery equalization voltage. If the battery voltage is still lower than the battery equalization voltage when the battery equalized timeout setting is over, the charge controller will stop equalization and return to the float stage.

Diagram illustrating battery charging stages with voltage levels: Equalize Voltage, Absorption Voltage, Float Voltage. Shows the duration of Equalize Charging Time and Equalize Charging Timeout.

Fault Reference Code

Fault Code	Fault Event	Icon
01	Fan is locked when inverter is OFF	01
02	Over temperature	02
03	Battery voltage is too high	03
04	Battery voltage is too low	04
05	Output short circuited or over temperature is detected on internal converter components	05
06	Output voltage is too high	06
07	Overload time out	07
08	Bus voltage is too high	08
09	Bus soft start failed	09
11	Main relay failed	11
13	Solar charger stops due to high PV voltage	13
51	Over current/Surge	51
52	Bus voltage is too low	52
53	Soft start failure	53
55	Over DC voltage	55
57	Current sensor failure	57
58	Output voltage is too low	58

Warning Indicator

Warning Code	Warning Event	Audible Alarm	Icon Flashing
01	Fan is locked when inverter is on.	Beep three times every second	01
03	Battery over-charged	Beep once every second	03
04	Low battery	Beep once every second	04
07	Overload	Beep once every 0.5 second	07
10	Output power derating	Beep twice every 3 seconds	10
15	PV energy is low	Beep twice every 3 seconds	15
Eq	Battery equalization in process	-	19
bp	Battery connection issue	-	19

Warning codes in lithium battery mode

Warning Code	Warning Event	Cause of Event
04	Low battery voltage	Minimum voltage of a lithium battery cell < 2.85V; Lithium battery total voltage < 42V (48V lithium battery); Lithium battery voltage < 22.4V (24V lithium battery).
05	High battery voltage	Lithium battery maximum single cell voltage > 3.55V; Total voltage of lithium battery > 54V (48V lithium battery); Total voltage of lithium battery > 28.8V (24V lithium battery).
06	Low battery level	Current battery level ≤ 10%

SPECIFICATIONS

Table 1: Line Mode Specifications

	EG-422B	EG-624B
Input Voltage Waveform	Sinusoidal (utility or generator)
Nominal Input Voltage	230VAC
Low Loss Voltage	170VAC ± 7V (UPS) 90VAC ± 7V (Appliances)
Low Loss Return Voltage	180VAC ± 7V (UPS) 100VAC ± 7V (Appliances)
High Loss Voltage	280VAC ± 7V
High Loss Return Voltage	270VAC ± 7V
Max AC Input Voltage	300VAC
Nominal Input Frequency	50 Hz / 60 Hz (Auto detection)
Cut-off Low Frequency	40 ± 1 Hz
Recovery (Low) Frequency	42 ± 1 Hz
Cut-off High Frequency	65 ± 1 Hz
Recovery (High) Frequency	63 ± 1 Hz
Output Short Circuit Protection	Circuit Breaker
Efficiency (Line Mode)	>95% (Rated R load, battery full charged)
Transfer Time	10ms typical (UPS); 20ms typical (Appliances)

Output power derating graph: Shows output power decreasing as input voltage drops below 170V and 280V.

Table 2: Inverter Mode Specifications

	EG-422B	EG-624B
Rated Output	4.2 kW	6.2 kW
Output Voltage Waveform	Pure Sine Wave
Output Voltage Regulation	230VAC ± 5%
Output Frequency	50 Hz
Peak Efficiency	93%
Overload Protection	5s@ ≥ 150% load; 10s@ ≥ 110% ~ 150% load
Surge Capacity	2 * rated power for 5 seconds
Nominal DC Input Voltage	24 VDC	48 VDC
Cold Start Voltage	23.0 VDC	46.0VDC
Low DC Warning Voltage	@ load < 20%: 22.0VDC @ load ≥ 50%: 20.2VDC	@ load < 20%: 44.0VDC @ load ≥ 50%: 40.4VDC
Low DC Warning Return Voltage	@ load < 20%: 22.5VDC @ load ≥ 50%: 21.0VDC	@ load < 20%: 45.0VDC @ load ≥ 50%: 42.0VDC
Low DC Cut-off Voltage	@load < 20%: 20.5VDC @ load ≥ 50%: 20.0VDC	@load < 20%: 41.0VDC @ load ≥ 50%: 40.0VDC
High DC Recovery Voltage	32VDC	62VDC
High DC Cut-off Voltage	33VDC	63VDC
No-Load Power Consumption	35 W	50 W

Table 3: Two-output Specifications

Model	EG-422B	EG-624B
Full Load	4200 W	6200 W
Max. Main load	4200 W	6200 W
Max. Secondary load	1400 W	2066 W
Main load cut-off voltage	26VDC	52VDC
Main load return voltage	27VDC	54VDC

Table 4: Charge Mode Specifications

Utility Charging Mode

		EG-422B	EG-624B
Charging Algorithm		3-Step
AC Charging Current		100 Amp (0V input = 230V)
Bulk Charging Voltage (V)	Flooded Battery	29.2	58.4
	AGM / Gel Battery	28.2	56.4
Floating Charging Voltage		27.0VDC	54.0VDC
Charging Curve	Diagram showing Battery Voltage per cell vs. Charging Time, illustrating Bulk (Constant Current), Absorption (Constant Voltage), and Maintenance (Floating) stages. Also shows Current vs. Charging Time.

Solar Charging Mode (MPPT)

	EG-422B	EG-624B
Rated Out Power	6200 W	6500 W
Max. PV array open circuit voltage	500 VDC
Max. Charging Current (AC charger + Solar charger)	120 Amp
PV array MPPT voltage range	60-500 VDC

Table 5: Grid-Tie Specifications

Model	EG-422B	EG-624B
Nominal Output Voltage	220 / 230 / 240 VAC
Feed-in Grid Voltage Range	195 ~ 253 VAC
Feed-in Grid Frequency Range	49 ~ 51 ± 1 Hz / 59 ~ 61 ± 1 Hz
Nominal Output Current	18.2 A	26.9 A
Power Factor Range	>0.99
Max. Conversion Efficiency	97%

Table 6: General Specifications

Model	EG-422B	EG-624B
Safety Certification	CE
Operating temperature range	-10 ~ 50°C
Storage temperature	-15 ~ 60°C
Humidity	5% ~ 95% Relative humidity (non-condensing)
Dimension (DWH) (mm)	358 * 442 * 116
Net weight (kg)	8.0	8.9

TROUBLE SHOOTING

Problem	LCD/LED/ Buzzer	Explanation / Possible Cause	What to do
Shuts down automatically during startup process.	LCD/LEDs and buzzer activated for 3 seconds and then complete off.	The battery voltage is too low (< 1.91V/Cell)	1. Re-charge battery. 2. Replace battery.
No response after power on.	No indication.	1. The battery voltage is far too low (< 1.4V/Cell) 2. Battery polarity is connected reversed.	1. Check if batteries and the wiring are connected firmly. 2. Replacing the fuse. 3. Re-charge battery. 4. Replace battery.
Mains exist but the unit works in battery mode.	Input voltage is displayed as 0 on the LCD and green LED flash.	Input protector is tripped.	Check if AC breaker is tripped and AC wiring is connected well.
	Green LED flashes.	Insufficient quality of AC power. (Shore or Generator)	1. Check if AC wires are too thin and/or too long. 2. Check if generator (if applied) is working well or if input voltage range setting is correct. (UPS → Appliance)
	Green LED flashes.	"Solar First" is selected	Change output source priority to utility.
When the unit is turned on, internal relay keeps ON and OFF repeatedly.	LCD display and LEDs flash.	Battery is disconnected.	Check if battery wires are connected well.
Buzzer beeps continuously and red LED is on.	Fault code 07	Overload error. The inverter is overloaded 110% and time is up.	Reduce the connected load by switching off some equipment.
	Fault code 05	Output short circuited.	Check if wiring is connected well and remove abnormal load.
	Fault code 05	Temperature of internal converter component is over 120°C.	Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.
	Fault code 02	Internal temperature of inverter component is over 100°C.
	Fault code 03	Battery is overcharged.	Return to service center.
	The battery voltage is too high.	Check if spec and quantity of batteries meet requirements.
	Fault code 01	Fan fault	Replace the fan.
Fault code 06 / 58	Output abnormal (Inverter voltage below than 190VAC or is higher than 260VAC)	1. Reduce the connected load. 2. Return to repair center.
Fault code 08/09/53/57	Internal components failed.	Return to repair center.
Fault code 51	Over current or surge	Restart and if happens again, return to repair center.
Fault code 52	Bus voltage too low
Fault code 55	Output voltage imbalance
Fault code 56	Battery connection issue or fuse burnt	Check battery connection.

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