USER MANUAL
EDECOA
HYBRID INVERTER / CHARGER
Models: EM-352A, EM-654A
Version: 2.3
About This Manual
This manual describes the assembly, installation, operation, and troubleshooting of this unit. Please read this manual carefully before installation and operations. Keep this manual for future reference. This manual provides safety and installation guidelines as well as information on tools and wiring.
Safety Instructions
- Before using the unit, read all instructions and cautionary markings on the unit, the batteries, and all appropriate sections of this manual.
- CAUTION: To reduce the risk of injury, charge only deep-cycle lead-acid type rechargeable batteries. Other types of batteries may burst, causing 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 a risk of electric shock or fire.
- To reduce the risk of electric shock, disconnect all wirings before attempting any maintenance or cleaning. Turning off the unit will not reduce this risk.
- CAUTION: Only qualified personnel can install this device with battery.
- NEVER charge a frozen battery.
- For optimum operation of this inverter/charge, please follow the required specs to select the appropriate cable size. It's very important to correctly operate this inverter/charger.
- Be very cautious when working with metal tools on or around batteries. A potential risk exists to drop a tool to spark or short circuit batteries or other electrical parts which could cause an explosion.
- Please strictly follow the installation procedure when you want to disconnect AC or DC terminals. Please refer to the INSTALLATION section of this manual for the details.
- GROUNDING INSTRUCTIONS: This inverter/charger should be connected to a permanent grounded wiring system. Be sure to comply with local requirements and regulations to install this inverter.
- NEVER cause AC output and DC input short-circuited. DO NOT connect to the mains when DC input short circuits.
- Warning!! Only qualified service persons are able to service this device. If errors still persist after following the troubleshooting table, please send this inverter/charger back to the local dealer or service center for maintenance.
Introduction
This is a multifunctional off-grid photovoltaic inverter, integrating an MPPT photovoltaic charge controller, a high-frequency pure sine wave inverter, and a UPS function module. It is very suitable for off-grid backup power and self-generation systems. The high-frequency transformer design allows the machine to provide reliable power conversion even under minimal size. This inverter can also operate without batteries.
The entire system requires other devices to achieve complete operation, such as photovoltaic modules, generators or public grids. Please consult your system integrator according to your requirements to obtain other possible system components that may be needed. The Wi-Fi module is a plug-and-play monitoring device installed on the inverter. With this device, users can monitor the operation of the photovoltaic system anytime and anywhere through their mobile phones or websites.
Features
- Pure sine wave solar inverter
- Double AC output design - one for main load and one for emergency backup
- Built-in MPPT, working range 55-430V, maximum open-circuit voltage 450V
- RGB LED lights – indicating different working modes
- Configurable AC/Battery input priority via LCD setting
- Auto restart while PV is recovering
- Over-load, over temperature and output short circuit protection
- Built-in lithium battery automatic activation – better usage of your lithium batteries.
- RS485 for communication with BMS of lithium batteries.
- Cold start function
- Built-in clock – configurable utility charging timing and quantifiable solar power generation
- Wi-Fi monitoring function (optional)
- Off-line upgrading function – COM port for software upgrade
- No-battery mode available
Basic System Architecture
The following illustration shows the basic application for this inverter/charger. It also includes the following devices to have a complete running system:
- Generator or Utility [⚡]
- PV modules (option) [☀️]
Consult with your system integrator for other possible system architectures depending on your requirements.
This inverter can power all kinds of appliances in the home or office environment, including motor-type appliances such as tube light, fan, refrigerator and air conditioner.
Diagram Description (Figure 1 Hybrid Power System): This diagram illustrates a typical setup. It shows solar panels [☀️], a generator, and utility power [⚡] connecting to the EDECOA Hybrid Inverter/Charger. The inverter is also connected to external battery packs. The output of the inverter powers various home appliances like a TV, fan, and light bulb.
Product Overview
The front panel of the inverter features an LCD display and function buttons. The rear panel houses various input and output ports.
Front Panel Components:
- 1. LCD display and buttons [⚙️]
- 2. Power on/off switch [▶️/■]
Rear Panel Ports:
- 3. Ground [?]
- 4. AC input [?]
- 5. AC main output [⚡]
- 6. AC Emergency Power Supply output [⚡]
- 7. PV input [☀️]
- 8. Ground [?]
- 9. Battery input [?]
- 10. BMS port [?]
- 11. RS485 communication port [?]
Operation
Power ON/OFF
Once the unit has been properly installed and the batteries are connected well, simply press the ON/OFF switch (located on the right side of the case) to turn on the unit.
Operation and Display Panel
The operation and display panel is on the front panel of the inverter. It includes three indicators, four function keys, and an LCD display, indicating the operating status and input/output power information.
LED Indicators:
| LED Indicator | Messages |
|---|---|
| AC/INV ? | Solid On: Output is powered by utility in Line mode. Flashing: Output is powered by battery or PV in battery mode. |
| CHG ? | Solid On: Battery is fully charged. Flashing: Battery is charging. |
| FAULT ⚠️ | Solid On: Fault occurs in the inverter. Flashing: Warning condition occurs in the inverter. |
Function Keys:
| Function Key | Description |
|---|---|
| [ESC] | To exit current page |
| [UP] | To go to previous selection |
| [DOWN] | To go to next selection |
| [ENTER] | To confirm the selection in setting mode or enter setting mode |
LCD Display Icons
| Icon | Description |
|---|---|
AC Input Information |
AC input, voltage and frequency |
AC BYPASS |
AC bypass providing power |
PV Input Information |
PV input, power, voltage and current |
Output Information |
Output voltage, output frequency, output current and temperature |
Load Information |
Load (in kW or in VA) and load percentage Overload warning |
Battery Information |
Battery, battery voltage, current and capacity percentage. Lithium battery connected |
Configuration Program and Fault Information
| Display | Description |
|---|---|
[888] |
Program setting |
[8.88 W] |
Warning and fault codes |
[888] |
Fault code |
[X] |
Alarm muted. |
LCD Setting
Press and hold [ENTER] button for 5 seconds to enter setting mode. Press "UP" or "DOWN" button to select setting programs. Press "ENTER" button to confirm the selection or [ESC] button to exit.
| Program | Description | Selectable option | |
|---|---|---|---|
| [00] | Exit setting mode | [ESC] Escape | |
| [01] | Output source priority: To configure load power source priority |
(Default) [SBU] Solar energy provides power to the loads as a priority. If solar energy is not sufficient to power all connected loads; utility energy will be the next supplement. (Default) [SBU] Solar energy provides power to the loads as a priority. If solar energy is not sufficient to power all connected loads; battery will be the next supplement. Battery low voltage warning is programmable in Program 13. |
|
| [02] | Maximum total charging current | 10A [10] Default charging current 80A, setting range is 10A – 110A. (Max. charging current = utility charging current (10-80A, program 11) + solar charging current) |
110A [110] A |
| [03] | AC input voltage range | Appliance (default) [APL] AC input voltage range becomes within 90-265VAC. |
UPS mode [UPS] AC input voltage range becomes within 170 - 265VAC. |
| [04] | *Power saving mode | Saving mode disable (default) [S85] If disabled, no matter connected load is low or high, the on/off status of inverter output will not be affected. |
Saving mode enable [SEN] If enabled, the output of inverter will be off when connected load is too low or not detected. |
| [05] | Battery type | AGM (default) [AGn] Flooded [FLd] User-Defined [USE] If "User-Defined" is enabled, battery charge voltage can be set up in program 26, 27 and 29. Lithium battery [Li] After setting to “LIB”, the floating charge will be cancelled. Once LIB is enabled, battery charging voltage and DC cut-off voltage can be set up in program 26 and 29 respectively. Communication with Lithium battery: [485] If "485" is selected here, Program 12, 13 and 29 will display SOC. |
|
| [06] | Auto restart when overload occurs | Restart disabled (default) [Lrd] | Restart enabled [LFE] |
| [07] | Auto restart when over temperature occurs | Restart disabled [Lrd] | Restart enabled [LFE] |
| [08] | Output voltage | 220V [220] V |
230V(default) [230] V 240V [240] V The setting range is 100-240V, DO NOT change this setting except professional personnel. |
| [09] | Output frequency | 50Hz (default) [50] 60Hz [60] |
|
| [10] | Battery producers (optional) | [PYL] | [PAC] If your batteries were not from Pylontec or Paceex, please disregard this program. |
| [11] | Maximum utility charging current (Setting range 11-80A) | [UE1] [11] | [UE1] [11A] |
| [12] | When "SBU priority" in Program 01 is selected, you can set the voltage of switching back to utility here. When battery voltage is lower than setting value, power supply will be switched back to utility. | EM-352A: 22.0V [220] V (Default 23.0V) EM-654A: 44.0V [440] V (Default 46.0V) |
EM-352A: 25.5V [255] V EM-654A: 51.0V [510] V |
| [13] | When "SBU priority" in Program 01 is selected, you can set the voltage of switching back to batteries here. When battery voltage is higher than setting value, power supply will be switched back to batteries. | EM-352A: 24.0V [240] V (Default 27.0V) | EM-352A: 29.0V [290] V EM-654A: 48.0V [480] V (Default 54.0V) EM-654A: 58.0V [580] V |
| [16] | Charger source priority: To configure charger source priority |
Solar and Utility (default) [SNU] Solar energy and utility will charge battery at the same time. |
Solar only [050] Solar energy will be the only charger source regardless utility is available or not. Solar first [CSO] Solar energy will charge batteries as first priority. Utility will charge battery only when solar energy is not available. If this inverter/charger is working in Battery mode or Power saving mode, only solar energy can charge battery. Solar energy will charge battery if it's available and sufficient. |
| [17] | For factory use only, please disregard this one. | ||
| [18] | Alarm control | Alarm on (default) [60n] | Alarm off [60F] |
| [19] | Auto return to default display screen | [ESP] If enabled, no matter how users switch display screen, it will automatically return to default display screen (Input voltage /output voltage) if no operation for 1 minute. |
[FEP] If enabled, the display screen will stay at latest screen user finally switches. |
| [20] | Backlight control | Backlight on (default) [LON] | Backlight off [LOF] |
| [22] | Beeps while primary source is interrupted | Alarm on (default) [80n] | Alarm off [AOF] |
| [23] | When this function is enabled, if overload occurs in battery mode, inverter will switch to AC by-pass mode | By-pass disabled (default) [698] | By-pass enabled [69E] |
| [25] | Record Fault code | Record disabled (default) [FAS] | Record enabled [FEN] |
| [26] | Bulk charging voltage (C.V voltage) | EM-352A default setting: 29.2V [292] V EM-654A default setting: 56.4V [564] V If USE or LIB is enabled in program 05, charging voltage can be adjusted. The setting range is from 24.0V to 29.2V for EM-352A and 48.0V to 58.4V for EM-654A. Increment of each click is 0.1V. |
|
| [27] | Floating charging voltage | EM-352A default to 27.0V [270] V EM-654A default setting:54.0V [540] V If USE or LIB is enabled in program 5, this program can be set up. Setting range is from 24.0V to 29.2V for EM-452A, and 48.0V to 58.4V for EM-654A. Increment of each click is 0.1V. |
|
| [29] | Low DC cut-off voltage | EM-452A default setting: 21.0V [210] V EM-654A default setting: 42.0V [420] V If "485"is selected in program 5, Program 29 will indicate a percentage. The default value is 20%. The value ranges from 5% to 30%. If self-defined is selected in program 5, this program can be set up. The setting range is from 20.0V to 24.0V for EM-452A, and 40.0V to 48.0V for EM-654A. Increment of each click is 0.1V. Low DC cut-off voltage will be fixed to setting value no matter what percentage of load is connected. |
|
| [33] | Battery equalization | Disabled (Default) [EdS] | Activated [EEN] Only if "Flooded” or “User-Defined” was selected in program 05, this program can be set up. |
| [34] | Battery equalized voltage | EM-352A default setting: 29.2V [292] V The setting range is from 25.0V to 29.5V. Increment of each click is 0.1V. |
EM-654A default setting: 58.4V [584] V The setting range is from 50.0V to 59V. Increment of each click is 0.1V. |
| [35] | Battery equalized time | 60min (default) [60] Setting range is from 5min to 900 min. Increment of each click is 5 min. |
|
| [36] | Battery equalize timeout | 60min (default) [120] Setting range is from 5min to 900 min. Increment of each click is 5 min. |
|
| [37] | Equalization interval | 30days (default) [30d] The setting range is from 0 to 90 days. Increment of each click is 1 day. |
|
| [39] | Equalization activated immediately | Disabled (default) [AAS] | Enabled [AEN] If equalization function is enabled in program 33, this program can be set up. If “Enable" is confirmed in this program, it's to activate battery equalization immediately and LCD main page will show "E9". If "Disable" is confirmed, it will cancel equalization function until next activated equalization time arrives based on program 37 setting. At this time, "E9" will not be shown in LCD main page. |
| [40] | Time setting: Year | [2023] The setting range is 2023-2099 |
|
| [41] | Time setting: Month | [5] Use up and down key to adjust month. |
|
| [42] | Time setting: Day | [5] Use up and down key to adjust day. |
|
| [43] | Time setting: Hour | [5] Use up and down key to adjust hour. |
|
| [44] | Time setting: Minute | [5] Use up and down key to adjust minute. |
|
| [45] | Time setting: Second | [5] Use up and down key to adjust second. |
|
| [46] | Utility charging hours | 0000 by default, allowing charging all day. Use the 4 digits for charging hours setting: the first 2 digits represent starting hour and the last 2 digits represent ending hours. For example, 2320 means starting charging from 23:00 and ending at 20:00 the second day. |
|
| [47] | Load time of utility power | 0000 by default, allowing using utility/mains all day. Use the 4 digits to set up timing of using utility/mains power for loads. The first 2 digits represent starting hour and the last 2 digits represent ending hours. For example, 2320 means starting charging from 23:00 and ending at 20:00 the second day. |
|
| [48] | RGB light mode | RGB lights ON (default) [LON] | RGB lights OFF [LOF] |
| [49] | Double-output | Disabled (default) [L2F] | Enabled [L2N] If double-output is enabled, when low-voltage occurs, inverter will cut off main-output until battery voltage recovers to setting value in program 13. |
| [50] | On-grid | Disabled (default) [CFd] | Enabled [CFE] If enabled, PV energy output will be charging battery first, then the rest of it will be returned to grid. |
Lithium Battery Connection
If the inverter is matched with lithium batteries, only lithium batteries that have been matched with the BMS communication protocol are allowed to be used:
Please follow below steps to implement lithium battery connection:
- Assemble battery ring terminal based on recommended battery cable and terminal specifications.
- Insert the ring terminal of battery cable flatly into battery connector of inverter and make sure that the bolts are tightened with a 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.
- Connect the RJ45 connector to the COMM port on the inverter.
- Connect the other end of the RJ45 plug to the battery communication port (RS485). Note: If choosing lithium battery, make sure you have connected the BMS communication cable between the battery and the inverter. You need to choose battery type as "LIB-485" mode in program 05.
Lithium battery communication and setting
In order to communicate with battery BMS, you should set the battery type to "485" in Program 5.
- Connect the end of RJ45 of battery to BMS communication port of inverter. Ensure that the BMS port of the lithium battery corresponds to the pin of the BMS communication port of the inverter. The pin of the inverter BMS interface is defined as shown in the following figure:
BMS Interface Pinout:
| Pin number | Port definitions |
|---|---|
| 1 | RS485B |
| 2 | RS485A |
| 3 | NG |
| 4 | NG |
| 5 | NG |
| 6 | NG |
| 7 | RS485A |
| 8 | RS485B |
Diagram Description: A diagram shows an 8-pin connector with pins labeled 1 through 8, corresponding to RS485B, RS485A, NG, NG, NG, NG, RS485A, RS485B.
- Press [ENTER] for 5 seconds, enter program setting 05 and set battery type to LIB-485.
Battery Type Setting:
- Lithium-ion battery [Li]
- Lib 485 [Li 485]
Note: When the battery type is set to 485, the charge current can't be modified by the user. The inverter will cut off output if communication fails.
Battery Percentage Ranges:
- When "SBU" in Program 01 is enabled, set up the voltage where inverter switches to utility/mains input: Battery percentage ranges from 10%-50% [50 %]
- When "SBU" in Program 01 is enabled, set up the voltage where inverter switches to battery input: Battery percentage ranges from 30%-100% [95 %]
- Low DC cut-off voltage: Battery percentage ranges from 5%-30% [20 %]
3. Long press [ESC] key to the initial screen to check battery voltage and remaining battery level.
4. Detailed description of display interface for lithium battery:
Total battery voltage, Battery remaining capacity (Initial interface display):
Diagram Description: Shows GRID 271V, AC BYPASS 77%, LOAD 60F, and BATTERY with a battery icon.
Diagram Description: Shows GRID 46A, AC/INV CHG, LOAD 02, and BATTERY with a battery icon.
Diagram Description: Shows GRID 97, AC/INV CHG, LOAD 65, and BATTERY with a battery icon.
Diagram Description: Shows GRID 391°C, AC/INV CHG, LOAD 402°C, and BATTERY with a battery icon.
Diagram Description: Shows GRID 3.39V, AC/INV CHG, LOAD 3.39V, and BATTERY with a battery icon.
Warning and Fault Codes
Warning Code
| Warning Code | Warning Event | Audible Alarm | Icon flashing |
|---|---|---|---|
| 01 | Fan is locked when inverter is on. | Beep three times every second | [01] ⓘ |
| 03 | Battery is 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 is weak | [15] ⓘ | |
| EQ | Battery equalization | [E9] ⓘ | |
| BP | No battery connected | [6P] ⓘ |
Fault Code
| Error Code | Error Event | Error Icon |
|---|---|---|
| 21 | Battery cell over-voltage | [21] ERROR |
| 22 | Battery cell low voltage | [22] ERROR |
| 23 | Single battery cell over-voltage | [23] ERROR |
| 24 | Single battery cell low voltage | [24] ERROR |
| 25 | Charging over-current | [25] ERROR |
| 26 | Discharging over-current | [26] ERROR |
| 27 | Charging cell high temperature | [27] ERROR |
| 28 | Discharging cell high temperature | [28] ERROR |
| 29 | Charging cell low temperature | [29] ERROR |
| 30 | Charging cell high temperature | [30] ERROR |
| 34 | Low capacity of battery | [34] ERROR |
| 61 | Communication error | [61] ERROR |
Fault Reference Code:
| Code/Icon | Fault Event | Code/Icon | Fault Event |
|---|---|---|---|
| [01] ERROR | Fan is locked when inverter is off | [07] ERROR | Overload time out |
| [02] ERROR | Over temperature | [08] ERROR | BUS voltage is too high |
| [03] ERROR | Battery voltage is too high | [09] ERROR | BUS soft start failed |
| [04] ERROR | Battery voltage is too low | [13] ERROR | Over-voltage from PV panels |
| [05] ERROR | Output short circuited or over temperature is detected by internal converter components | [51] ERROR | Over-current or surge |
| [06] ERROR | Output voltage is too high | [52] ERROR | BUS voltage is too low |
| [53] ERROR | Inverter soft start failed | [55] ERROR | Over DC voltage in AC output |
| [56] ERROR | Loosen battery connection/battery disconnected | [57] ERROR | Electrical current sensor failed |
| [58] ERROR | Output voltage is too low |
LCD Display Information
The LCD display information can be switched in turns by pressing the "UP" or "DOWN" key. Information is displayed 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.
Default Display Screen Examples:
Information:
- 1. AC Input voltage
- 2. Output voltage
- 3. Load percentage
- 4. PV input voltage
- 5. Battery Voltage
LCD Display:
Diagram Description: Shows GRID 230V, AC BYPASS 230V, LOAD 18%, SOLAR 3080V, AC/INV CHG, BATTERY 540V.
Information:
- 1. AC Input frequency
- 2. Output frequency
- 3. Load power rate in VA
- 4. PV input current
- 5. Battery Voltage
LCD Display:
Diagram Description: Shows GRID 50Hz, AC BYPASS 50.0Hz, LOAD 800VA, SOLAR 8.2A, AC/INV CHG, BATTERY 540V.
Information:
- 1. AC Input voltage
- 2. Output voltage
- 3. Load power rate
- 4. PV input power
- 5. Battery charging current
LCD Display:
Diagram Description: Shows GRID 230KW, AC BYPASS 230KW, LOAD 108KW, SOLAR 22A, AC/INV CHG, BATTERY 36.6A.
Information:
- 1. AC Input frequency
- 2. Temperature of inverter
- 3. Output current
- 4. PV generated power in kWh
- 5. Battery charging current
LCD Display:
Diagram Description: Shows GRID 50Hz, AC BYPASS 3.14°C, LOAD 12.4A, SOLAR 5.2KWh, AC/INV CHG, BATTERY 68A.
Diagram Description: Shows PV power generated within the last 30 days (88), PV power generated within the last 365 days (36), PV power generated within the last 24 hours (28.83 KWh).
Firmware version:
Diagram Description: Shows Firmware version 57.00.
Time: 2023-07-26 15:35:06
Diagram Description: Shows time/date related values: 2023, 15, 35, 06, 07, 26.
Operating Mode Description
| Operation mode | Description | LCD display |
|---|---|---|
| Standby mode / Power saving mode Note: *Standby mode: The inverter is not turned on yet but at this time, the inverter can charge the batteries. *Power saving mode: If enabled, the output of inverter will be off when connected load is pretty low or not detected. |
No output is supplied by the unit but it still can charge batteries. | Diagram Description: Shows GRID 230V, SOLAR 250V, AC/INV CHG, BATTERY 48V. Text: Battery charged by utility and PV panels. |
| Diagram Description: Shows GRID 230V, AC/INV CHG, BATTERY 48V. Text: Battery charged by utility. | ||
| Battery charging by PV energy. | Diagram Description: Shows SOLAR 250V, AC/INV CHG, BATTERY 48V. Text: Battery charging by PV energy. | |
| Utility mode | Utility provides electricity to loads. Batteries can be charged in this mode. | Diagram Description: Shows GRID 230V, AC BYPASS 230V, LOAD 321 KVA, SOLAR 13A, AC/INV CHG, BATTERY 58A. Text: Battery charged by utility and PV. |
| Diagram Description: Shows GRID 230V, AC BYPASS 230V, LOAD 321 KVA, AC/INV CHG, BATTERY 58A. Text: Battery charged by utility. | ||
| Inverter runs without battery. | Diagram Description: Shows GRID 230V, AC BYPASS 230V, LOAD 321 KVA, SOLAR 13A, AC/INV CHG, BATTERY [bP]. Text: Inverter runs without battery. | |
| Inverter Mode | Solar panels (PV) and battery provide electricity to loads. | Diagram Description: Shows SOLAR 250V, AC/INV CHG, LOAD 321 KVA, BATTERY 48V. Text: Solar panels (PV) and battery provide electricity to loads. |
| Battery provides electricity to loads. | Diagram Description: Shows AC/INV CHG, LOAD 321 KVA, BATTERY 48V. Text: Battery provides electricity to loads. |
Battery Equalization Description
Equalization function is added into charge controller. It 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. Equalization also helps to remove sulfate crystals that might have built up on the plates. If left unchecked, this condition, called sulfation, will reduce the overall capacity of the battery. Therefore, it's recommended to equalize the battery periodically.
How to Apply Equalization Function
You must enable the battery equalization function in monitoring LCD setting program 30 first. Then, you may apply this function in the device by either one of the following methods:
- 1. Setting equalization interval in program 37.
- 2. 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 Equalize stage.
Diagram Description: A graph shows voltage levels over time, illustrating Bulk, Absorption, Float, and Equalize stages.
Equalize charging time and timeout
In 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 setting battery equalized time is arrived.
Diagram Description: A graph shows voltage levels over time, illustrating Bulk, Absorption, Float, and Equalize stages with Equalize Charging Time indicated.
However, in Equalize stage, when battery equalized time is expired and battery voltage doesn't rise to battery equalization voltage point, the charge controller will extend the battery equalized time until battery voltage achieves battery equalization voltage. If battery voltage is still lower than battery equalization voltage when battery equalized timeout setting is over, the charge controller will stop equalization and return to float stage.
Trouble Shooting
| Problem | LCD/LED/ Buzzer | Explanation / Possible cause | What to do |
|---|---|---|---|
| Unit shuts down automatically during startup process. | LCD/LED and buzzer will be activated for 3 seconds and then off. | The battery voltage is too low. | 1. Re-charge battery. 2. Replace battery. |
| No response after power on. | No indication. | 1. The battery voltage is far too low. 2. Battery polarity is connected reversed. |
1. Check if batteries and the wiring are connected well. 2. Re-charge battery. 3. Replace battery. |
| Utility connected but the unit works in battery mode. | Utility icon and LED are flashing | Insufficient quality of AC power (utility or generator) | Check if AC breaker is tripped and AC wiring is connected well. |
| When the unit is turned on, internal relay is switched on and off repeatedly. | LCD display and LED are flashing | Battery is disconnected. | Check battery wire connections. |
| Solar panel was set as the priority of input source. | Change input source priority to Utility first. | ||
| Buzzer beeps continuously and red LED is on. | Fault code 07 | Overload. Load reaches 110% rated power and has lasted longer than limit. | Reduce the connected load by switching off some equipment and restart. |
| Fault code 05 | Output short circuited. | Check connection of circuits and remove abnormal loads. | |
| Fault code 02 | Internal temperature of inverter component is too high | Check whether the air ventilation of the unit is good. | |
| Fault code 03 | Battery is over-charged. | Contact sales team. | |
| Fault code 01 | Fan fault | Check if specification and quantity of batteries have met requirements. Replace the fan. |
|
| Buzzer beeps continuously and red LED is on. | Fault code 06/58 | Output abnormal | 1.Reduce the connected load. 2.contact sales team |
| Fault code 08/09/53/57 | Internal components failed. | Contact sales team. | |
| Fault code 51 | Over-current or surge. | Restart the unit, if the error happens again, please contact sales team | |
| Fault code 52 | Bus Voltage is too low. | ||
| Fault code 55 | Output voltage is unbalanced. |
*Product technical specifications are subject to change without notice.
Visit our official website for more information.
Specifications
Table 1 Line Mode Specifications
| EM-452A | EM-654A | |
|---|---|---|
| Input Voltage Waveform | Sinusoidal (utility or generator) | |
| Nominal Input Voltage | 230Vac | |
| Low Loss Voltage | 170Vac± 7V (UPS) 90Vac± 7V (Appliances) | 180Vac± 7V (UPS) 100Vac± 7V (Appliances) |
| Low Loss Return Voltage | 170Vac± 7V | 180Vac± 7V |
| High Loss Voltage | 280Vac± 7V | |
| High Loss Return Voltage | 270Vac± 7V | |
| Max AC Input Voltage | 300Vac | |
| Nominal Input Frequency | 50Hz / 60Hz (Auto detection) | |
| Low Loss Frequency | 40±1Hz | |
| Low Loss Return Frequency | 42±1Hz | |
| High Loss Frequency | 65±1Hz | |
| High Loss Return Frequency | 63±1Hz | |
| Output Short Circuit Protection | Utility mode: Circuit Breaker Battery mode: Electronic Circuits | |
| Efficiency (Line Mode) | >95% (Rated R load, battery full charged) | |
| Transfer Time | 10ms typical (UPS); 20ms typical (Appliances) | |
| Output power derating: When AC input voltage drops to 170V, the output power will be derated. |
Diagram Description: A graph shows Output Power vs. Input Voltage. Rated Power is at the top. 50% Power is shown at a lower level. The curve starts at 90V, rises to Rated Power at 170V, and stays there until 280V. | |
Table 2 Inverter Mode Specifications
| INVERTER MODEL | EM-352A | EM-654A |
|---|---|---|
| Rated Output | 3800W | 6200KW |
| Output Voltage Waveform | Pure Sine Wave | |
| Output Voltage Regulation | 230Vac±5% | |
| Output Frequency | 60Hz or 50Hz | |
| Peak Efficiency | 95% | |
| 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 | 44.0Vdc |
| @ 20%<Load<50% | 21.4Vdc | 42.8Vdc |
| @ Load>=50% | 20.2Vdc | 40.4Vdc |
| Low DC Warning Relieving Voltage | ||
| @ Load<20% | 23.0Vdc | 46.0Vdc |
| @ 20%<Load<50% | 22.4Vdc | 44.8Vdc |
| @ Load>=50% | 21.2Vdc | 42.4Vdc |
| Low DC Cut-off Voltage | ||
| @ Load<20% | 21.0Vdc | 42.0Vdc |
| @ 20%<Load<50% | 20.4Vdc | 40.8Vdc |
| @ Load>=50% | 19.2Vdc | 38.4Vdc |
| High DC Recovery Voltage | 29Vdc | 58Vdc |
| High DC Cut-off Voltage | 31Vdc | 62Vdc |
| No Load Power loss | <25W | <50W |
| ECO mode power loss | <10W | <15W |
Table 3 Double Output Specification
| Model | EM-352A | EM-654A |
|---|---|---|
| Full load | 3800W | 6200W |
| Main output Maximum load | 3800W | 6200W |
| EPS output Maximum load (Battery mode) | 1200W | 2000W |
| Main output cut-off voltage | 22V | 44V |
| Main output recovery voltage (Same as program 13 setting) | 27V | 54V |
Table 4 Charging Mode Specifications
Utility Charging Mode
| INVERTER MODEL | EM-352A | EM-654A |
|---|---|---|
| Charging Current (UPS) @ Nominal Input Voltage | 80A | |
| Bulk Charging Voltage | Flooded Battery: 29.2 AGM/Gel Battery: 28.2 | Flooded Battery: 58.4 AGM/Gel Battery: 56.4 |
| Floating Charging Voltage | 27Vdc | 54Vdc |
| Charging Algorithm | 3-Step | |
Diagram Description: A charging curve graph shows Battery Voltage, per cell (2.43Vdc, 2.35Vdc, 2.25Vdc) and Charging Current, % (100%, 50%) over Time. The stages are Bulk (Constant Current), Absorption (Constant Voltage), and Maintenance (Floating). The time axis indicates T0 and T1, with T1 = 10* T0, minimum 10mins, maximum 8hrs.
MPPT Solar Charging Mode
| INVERTER MODEL | EM-352A | EM-654A |
|---|---|---|
| Maximum Power | 6000W | |
| Rated Solar Power Voltage | 240V | |
| Max. PV Array Open Circuit Voltage | 450Vdc | |
| PV Array MPPT Voltage Range | 55-430Vdc | |
| Maximum open-circuit voltage | 450V | |
| Maximum charging current of utility and solar panels | 110A | |
Table 5 General Specifications
| INVERTER MODEL | EM-352A | EM-654A |
|---|---|---|
| Operating Temperature Range | 0°C to 55°C | |
| Storage temperature | -15°C~ 60°C | |
| Dimension (D*W*H), mm | 423*300*120 | |
| Net Weight, kg | 7.3 | 8 |
