EDECOA Hybrid Inverter / Charger

1. ABOUT THIS MANUAL

This manual describes the operation and troubleshooting suggestions for EDECOA Hybrid Inverter EM-161A, EM-252A and EM-302A. Please read this manual carefully before operations. Keep this manual for future reference.

2. SAFETY INSTRUCTIONS

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

1. Before using the unit, read all instructions and cautionary markings on the unit, the batteries, and all appropriate sections of this manual.
2. 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.
3. 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.
4. NEVER charge a frozen battery.
5. For optimum operation of this inverter/charge, please follow the required specifications to select the appropriate cable size. It's very important to correctly operate this inverter/charger.
6. Please strictly follow the installation procedure when you want to disconnect AC or DC terminals. Please refer to the INSTALLATION for details.

3. INTRODUCTION

This is a multi-function inverter/charger, combining functions of inverter, solar charger and battery charger to offer uninterruptible power support with portable size. Its comprehensive LCD display offers user-configurable and easy-accessible button operation such as battery charging current, AC/ solar charger priority, and acceptable input voltage based on different applications.

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 is recovering
• Overload/ Over temperature/ short circuit protection
• Smart battery charger design for optimized battery performance
• Cold start function
• Wi-Fi (Optional)
• Can connect to lithium battery
• Intelligent fan speed adjustment

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

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: A schematic shows a hybrid power system. A solar panel array is connected to a central unit labeled "EDECOA Hybrid Inverter/Charger". This unit is also connected to a "Generator OR Utility" source and "External Battery packs". The output of the central unit powers "Home Appliances" such as a fan, light bulb, computer, and television.

3. OPERATION

Power ON/OFF

Side view of unit

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

Operation and Display Panel

The operation and display panel, shown in the below chart, 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.

LCD display

LED Indicator Table:

Function keys Table:

LCD Display Icons

Input Source Information:

• AC Icon: Indicates the AC input.
• PV Icon: Indicates the PV input.
• INPUT BATT TEMP Display: Indicate input voltage, input frequency, PV voltage, battery voltage, and charger current.

Configuration Program and Fault Information:

• Program Icon (8.8): Indicates the setting programs.
• Warning/Fault Icon (Error with number): Indicates the warning and fault codes. Warning: ERROR flashing with warning code. Fault: ERROR lighting with fault code.

Output Information:

• OUTPUT BATT LOAD Display: Indicate output voltage, output frequency, load percent, load in VA, load in Watt, and discharging current.

Battery Information:

• Battery Icon: Indicates battery level by 0-24%, 25-49%, 50-74%, and 75-100% in battery mode and charging status in line mode.

In AC mode, it indicates battery charging status.

Battery Charging Status Table:

In battery mode, it indicates battery capacity.

Battery Capacity Table:

Load Information:

• OVERLOAD Icon: Indicates overload.
• Load Level Diagram: Indicates the load level as below.
  [Diagram: Load level from 0-25%, 25-50%, 50-75%, 75-100% represented by increasing bar fill levels.]

Mode Operation Information:

• Utility Icon: Unit connected to the utility.
• BYPASS Icon: Unit connected to the PV panel. Load is supplied by utility power.
• [Arrow Icon]: Utility charger circuit is working.
• [Arrow Icon]: DC/AC inverter circuit is working.

Mute Operation:

• [Mute Icon]: Device muted.

Program Settings

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

Setting Program Table:

Display Setting

The LCD display information will be switched in turns by pressing "UP" or "DOWN" key. The selectable information is switched as below 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.

Selectable information Table:

Operating Mode Description

4. Battery Equalization Description

Equalization function is added to 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 but 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 33 first. Then, you may apply this function in the device by either one of the following methods:

1. Check that program 5 is the user-defined or flooded mode.
2. Check program 33 is enabled.
3. Setting equalization in program 34 to program 37, that depends on your battery requirements. (detailed information in LCD Setting part).
4. 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.

Equalize charging time and timeout

[Diagram: Charging curve showing stages: BULK, ABSORPTION, FLOAT, EQUALIZE, FLOAT, with voltage and time axes.]

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.

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.

5. Fault Reference Code

When fault occurs, ERROR icon will be on, please check the fault code below when it happens.

6. Warning Indicator

When warning occurs, ⚠️ icon will be on, please check the fault code below when it happens.

7. Lithium Battery and The Interface

1. Long press ENTER key to enter the setting item and set the 05 item to lithium battery mode Lib (as shown in the figure below)

Communication port pin definition Table:

2. Long press the ESC key to enter the lithium battery display interface (as shown in the picture below)

The initial display interface indicates the total battery voltage and remaining battery capacity

Press the DOWN key to indicate the data as below in turn

LCD data on the left Table:

Detailed description of display interface for lithium battery

Total battery voltage, Battery residual capacity (Initial interface display)

Total battery voltage=50.5V Battery residual capacity=4%
[Diagram: LCD showing total battery voltage 50.5V, residual capacity 4% with icons for Battery, Load]

Battery charging current, Battery discharge current

Battery charging current= 0A Battery discharge current= 21A
[Diagram: LCD showing battery charging current 0A, discharge current 21A with icons for Input, Battery, Load]

Battery capacity; Battery charger/ discharge Times

Battery capacity= 100Ah Battery charger/discharge Times=4
[Diagram: LCD showing battery capacity 100Ah, charge/discharge times 4 with icons for Battery, Load]

BMS board temperature; MOSFET temperature of BMS board

Battery ambient temperature=25.9°C Battery MOS temperature=25.7°C
[Diagram: LCD showing battery ambient temp 25.9°C, MOS temp 25.7°C with icons for Temp, Battery, Load]

Maximum voltage of a single battery, Minimum voltage of a single battery

Maximum voltage of a single battery=3.20V Minimum voltage of a single battery= 3.10V
[Diagram: LCD showing max voltage 3.20V, min voltage 3.10V with icons for Battery, Load]

Maximum temperature of a single battery, Minimum temperature of a single battery

Maximum temperature of a single battery=25.0°C Minimum temperature of a single battery=24.2°C
[Diagram: LCD showing max temp 25.0°C, min temp 24.2°C with icons for Temp, Battery, Load]

4. Warning Code

8.SPECIFICATIONS

Table 1 Line Mode Specifications

Table 2 Inverter Mode Specifications

Table 3 Charge Mode Specifications

Charging Curve:

[Diagram: Charging curve showing Battery Voltage vs. Charging Current, with stages: Bulk (Constant Current), Absorption (Constant Voltage), Maintenance (Floating).]

MPPT Solar Charging Mode

Table 4 General Specifications

9. TROUBLE SHOOTING

Download and use of PC monitoring software

1. Scan the QR code, find "Power Monitor" and download it.

2. Use the communication cable in the accessories to connect the computer to the hybrid inverter and keep the inverter turned on.

3. Find and open “SolarPowerSystem.exe" in the package file,

You can use a computer to check the working status of the hybrid inverter.

Note: Computers with Win10 systems do not need to install a driver to use them. If you have a Win7 system, you need to install a USB driver file.