EASUN POWER ISolar-SMG-II-11KP-48V-Wifi Hybrid Solar Inverter User Manual

1. Introduction

1.1 About This Manual

This manual describes the assembly, installation, operation, and troubleshooting of the EASUN POWER ISolar-SMG-II-11KP-48V-Wifi Hybrid Solar Inverter. Please read this manual carefully before installation and operation, and keep it for future reference.

This manual provides safety and installation guidelines, as well as information on tools and wiring.

1.2 Features

• Pure sine wave inverter
• Inverter running without battery
• Built-in MPPT solar controller (SMG-II-11KW model features a 160A Dual MPPT solar controller)
• 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

1.3 Basic System Architecture

The following illustration shows a basic application for this inverter/charger. A complete running system typically includes:

1. Generator or Utility.
2. PV modules (optional).

Consult with your system integrator for other possible system architectures depending on your requirements. This inverter can power various appliances in home or office environments, including motor-type appliances such as tube lights, fans, refrigerators, and air conditioners.

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. 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.
5. CAUTION: Only qualified personnel can install this device with a battery.
6. NEVER charge a frozen battery.
7. For optimum operation of this inverter/charger, please follow the required specifications to select appropriate cable size. It is very important to correctly operate this inverter/charger.
8. 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 and could cause an explosion.
9. 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 details.
10. A fuse is provided as over-current protection for the battery supply.
11. 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.
12. NEVER cause AC output and DC input short circuits. Do NOT connect to the mains when DC input short circuits.
13. 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.

3. Product Overview

The EASUN POWER Hybrid Solar Inverter is designed for efficient power management. Below is an overview of its components and indicators.

3.1 Product Display and Ports

1. LCD display
2. Status indicator
3. Charging indicator
4. Fault indicator
5. Function buttons
6. Power on/off switch
7. Battery negative/positive outlet hole
8. Parallel communication port (only for parallel model)
9. RS485 communication port (DJ45)
10. RS232 communication port (RJ45)
11. RS232 communication port (DB9)
12. Dry contact port
13. PV1 input
14. PV2 input
15. AC input
16. Grounding point
17. Main output
18. Second output

Note: RS232 communication port (DB9) and RS232 communication port (RJ45) cannot be used simultaneously; only one can be used at a time.

3.2 LED Indicators and Function Keys

The operation and display panel on the front of the inverter includes three indicators, four function keys, and an LCD display, providing operating status and input/output power information.

4. Setup (Installation)

4.1 Unpacking and Inspection

Before installation, please inspect the unit. Ensure that nothing inside the package is damaged. The package should contain:

• The unit x 1
• User manual x 1
• PV connector x 4
• Battery fuse x 1 (Only for 11K model)

4.2 Preparation

Before connecting any wirings, remove the bottom cover by unscrewing the four screws as shown in the diagram below.

4.3 Mounting the Unit

Consider the following points before selecting where to install the unit:

• Do not mount the inverter on flammable construction materials.
• Mount on a solid surface.
• Install this inverter at eye level to allow the LCD display to be read at all times.
• The ambient temperature should be between 0°C and 55°C to ensure optimal operation.
• The recommended installation position is to be adhered to the wall vertically.
• Ensure sufficient heat dissipation and enough space for removing wires by keeping other objects and surfaces as shown in the diagram.

WARNING: SUITABLE FOR MOUNTING ON CONCRETE OR OTHER NON-COMBUSTIBLE SURFACE ONLY.

Install the unit by screwing three M4 or M5 screws into the wall.

4.4 Battery Connection

CAUTION: For safety and compliance, install a separate DC over-current protector or disconnect device between the battery and inverter. An over-current protection is always required.

WARNING! All wiring must be performed by qualified personnel.

WARNING! It is crucial for system safety and efficient operation to use appropriate cables for battery connection. Use the proper recommended cable to reduce injury risk.

Follow these steps for battery connection:

1. Make positive and negative cables based on the recommended terminal size.
2. Connect all battery packs as required. It is suggested to use the recommended battery capacity.
3. Insert the battery cable flatly into the battery connector of the inverter and ensure the bolts are tightened with a torque of 10-12Nm. Verify that the polarity at both the battery and the inverter/charger is correctly connected and battery cables are tightly screwed to the battery connector.

4.5 AC Input/Output Connection

CAUTION: Before connecting to the AC input power source, install a separate AC breaker between the inverter and the AC input source. This ensures the inverter can be securely disconnected during maintenance and is protected from overcurrent. The recommended AC breaker is 63A.

CAUTION: There are two terminal blocks with "IN" and "OUT" markings. Do NOT mis-connect input and output connectors.

WARNING! All wiring must be performed by qualified personnel.

WARNING! It is very important for system safety and efficient operation to use appropriate cables for AC input connection.

Follow these steps to implement AC input/output connection:

1. Before making AC input/output connections, ensure the DC protector or disconnector is open.
2. Remove insulation sleeve 10mm for six conductors. Shorten phase L and neutral conductor N by 3mm.
3. Insert AC input wires according to the polarities indicated on the terminal block and tighten the terminal screws. Connect the PE protective conductor (yellow-green) first.
   • PE: Ground (yellow-green)
   • L: LINE (brown or black)
   • N: Neutral (blue)

WARNING: Ensure that the AC power source is disconnected before attempting to hardwire it to the unit.

Then, insert AC output wires according to the polarities indicated on the terminal block and tighten the terminal screws. Ensure the PE protective conductor is connected first.

• PE: Ground (yellow-green)
• L: LINE (brown or black)
• N: Neutral (blue)

CAUTION: Important: Ensure AC wires are connected with correct polarity. If L and N wires are connected reversely, it may cause utility short-circuiting when these inverters operate in dual output mode.

CAUTION: Appliances such as air conditioners are required at least 2-3 minutes to restart due to refrigerant gas balancing. If a power shortage occurs and recovers quickly, it can damage connected appliances. Check if your air conditioner has a time-delay function before installation. Otherwise, the inverter/charger may trigger an overload fault to protect your appliance, but internal damage can still occur.

4.6 PV Connection

CAUTION: Before connecting to PV modules, install a separate DC circuit breaker between the inverter and PV modules.

WARNING! All wiring must be performed by qualified personnel.

WARNING! It is very important for system safety and efficient operation to use appropriate cables for PV module connection. Use the proper recommended cable size to reduce injury risk.

PV Module Selection: When selecting PV modules, consider these parameters:

1. Open circuit Voltage (Voc) of PV modules must not exceed the max. PV array open circuit voltage of the inverter.
2. Open circuit Voltage (Voc) of PV modules should be higher than the min. battery voltage.

PV Module Wire Connection: Follow these steps:

1. Remove insulation sleeve 10mm for positive and negative conductors.
2. Check the correct polarity of the connection cable from PV modules and PV input connectors. Connect positive pole (+) of the connection cable to positive pole (+) of the PV input connector. Connect negative pole (-) of the connection cable to negative pole (-) of the PV input connector.
3. Ensure the wires are securely connected.

4.7 Final Assembly

After connecting all wirings, replace the bottom cover by screwing in the four screws.

5. Operating Instructions

5.1 Power ON/OFF

Once the unit is properly installed and the batteries are well connected, simply press the On/Off switch (located on the bottom of the case) to turn on the unit.

5.2 LCD Display and Settings

The LCD display provides real-time information about the inverter's operation. You can configure various settings using the function buttons.

To enter setting mode, press and hold the ENTER button for 3 seconds. Use "UP" or "DOWN" to select setting groups (F0/F1/F2/F3/F4). Press "ENTER" to confirm or "ESC" to exit.

• F0: Setting general parameters
• F1: Setting AC output parameters
• F2: Setting battery parameters
• F3: Setting time parameters
• F4: Setting systems parameters

The LCD display information can be cycled by pressing the "UP" or "DOWN" key. All information can be shown in areas 1, 2, or 3 of the LCD.

5.3 Dry Contact Signal

A dry contact (3A/250VAC) is available on the rear panel. It can be configured for two modes:

• Model1 (Program 16 of F0): Delivers a signal to an external device when battery voltage reaches a warning level.
• Model2 (Program 16 of F0): Triggers the grounding box to connect neutral and grounding of AC output when the unit is working in battery mode.

6. Maintenance

6.1 Battery Equalization

The equalization function reverses the buildup of negative chemical effects like stratification and helps remove sulfate crystals from battery plates, which can reduce battery capacity. It is recommended to equalize the battery periodically.

How to Apply Equalization Function:

First, enable battery equalization in monitoring LCD setting program 17 of F2. Then, you can apply this function by:

1. Setting the equalization interval in program 21 of F2.
2. Activating equalization immediately in program 22 of F2.

When to Equalize: In the float stage, when the set equalization interval is reached or equalization is activated immediately, the controller will enter the Equalize stage.

Equalize Charging Time and Timeout: During the Equalize stage, the controller charges the battery until its voltage reaches the battery equalization voltage. Constant-voltage regulation then maintains this voltage. The battery remains in the Equalize stage until the set battery equalized time is reached.

If the battery equalized time expires and the battery voltage has not reached the equalization voltage point, the charge controller will extend the time until the voltage is achieved. If the battery voltage is still lower than the equalization voltage when the battery equalized timeout setting is over, the charge controller will stop equalization and return to the float stage.

6.2 Setting for Lithium Battery

If using a lithium battery, ensure it is a compatible type. The lithium battery typically has two connectors: an RS485 port for BMS and a power cable.

Lithium Battery Connection:

1. Assemble battery terminals based on recommended battery cable and terminal size (similar to lead-acid batteries).
2. Connect the RS485 port of the battery to the BMS (RS485) communication port of the inverter.

Lithium Battery Communication and Setting: Connect the BMS communication cable between the battery and the inverter. This cable transmits information and signals, including:

• Re-configuring charging voltage, charging current, and battery discharge cut-off voltage according to lithium battery parameters.
• Allowing the inverter to start or stop charging based on the lithium battery's status.

Ensure the lithium battery RS485 port connects to the inverter Pin to Pin. The communication cable is included in the package. The inverter RS485 port pin assignment is as follows:

Setting for PYLON US2000 Lithium Battery:

PYLONTECH US2000 lithium batteries have 4 Dip Switches for baud rate and battery group address. Dip 1 "ON" sets baud rate to 9600. Dips 2, 3, and 4 are for battery group address. "1" is upper position, "0" is bottom position.

1. Use the RS485 cable to connect the inverter and the Lithium battery.
2. Switch on the Lithium battery.
3. Press and hold for more than three seconds to start the Lithium battery; power output ready.
4. Turn on the inverter.
5. Select battery type as "Li2" in LCD program 5. If communication is successful, the battery icon "Li" on the LCD display will light up.

Setting for Lithium Battery without Communication: If using a lithium battery without communication, follow these settings:

Before setting, obtain the battery BMS specifications (Max charging voltage, Max charging current, Discharging protection voltage).

1. Set battery type as "LIB" in program 01 of F2.
2. Set C.V voltage as Max charging voltage of BMS - 0.5V in program 03 of F2.
3. Set floating charging voltage as C.V voltage in program 03 of F2.
4. Set Low DC cut-off voltage ≥ discharging protection voltage of BMS + 3V.
5. Set Max charging current in program 09 of F2, which must be less than the Max charging current of BMS.
6. Set the voltage point back to utility source when selecting "SBU priority" in program 05 of F2. The setting value must be ≥ Low DC cut-off voltage + 2V, otherwise the inverter will warn of low battery voltage.

Remark: It is recommended to finish setting without turning on the inverter (just let the LCD show, no output). Restart the inverter after finishing settings.

7. Troubleshooting

This section provides solutions for common issues. If problems persist, contact qualified service personnel.

7.1 Fault Reference Code

Fault codes consist of a group code (A-G) and a number. For example, A0.

• A: Inverter group fault code
• B: Battery group fault code
• C: PV group fault code
• D: Output group fault code
• E: Parallel group fault code
• F: Other group fault code
• G: Grid group fault code

7.2 Warning Indicator

Warning codes also consist of a group code and a number. For example, 0B.

8. Specifications

Detailed technical specifications for the EASUN POWER Hybrid Solar Inverter.

8.1 Table 1 Line Mode Specifications

Output power derating:

• When AC input voltage drops to 95V or 170V (depending on models), the output power will be derated.
• When battery voltage drops to 50.5V (8.5K) / 55.0V (11K), the output power will be derated.

8.2 Table 2 Inverter Mode Specifications

8.3 Table 3 Charge Mode Specifications (Utility Charging Mode)

Charging Curve:

8.4 Table 3 Charge Mode Specifications (Solar Input)

8.5 Table 4 General Specifications

9. Warranty and Support

For detailed warranty information, please refer to the official product documentation or contact your seller. In case of any issues not resolved by the troubleshooting guide, please contact your local dealer or service center for maintenance.

A comprehensive user manual in PDF format is available for further reference: User Manual (PDF).

10. User Tips

• Always ensure proper ventilation around the inverter to prevent overheating, especially during high load operation.
• Regularly check battery connections for tightness and corrosion to maintain optimal performance and safety.
• When configuring settings, double-check all parameters, especially for battery type and charging currents, to match your specific battery system.
• For parallel installations, ensure all inverters are on the same firmware version and that communication cables are securely connected.