EASUN Hybrid Solar Inverter User Manual

1. Introduction

This manual provides essential information for the safe and efficient operation of your EASUN Hybrid Solar Inverter. Please read this manual thoroughly before installation and use. Keep this manual for future reference.

Key Features

• Pure sine wave inverter output.
• Configurable 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 power generator.
• Auto restart while AC is recovering.
• Overload, over temperature, and short circuit protection.
• Smart battery charger design for optimized battery performance.
• Cold start function.
• WIFI module included for monitoring and control.
• High PV input voltage range (55-450VDC).
• Built-in Max 80A (2.2KW & 3.2KW models) or 120A (4.2KW & 6.2KW models) MPPT solar charge controller.
• Compatible with Lithium-ion batteries and supports BMS communication.
• Intelligent fan speed adjustment.
• Built-in anti-dust kit for harsh environments (optional).

2. Safety Information

Please observe all warnings and instructions marked on the unit and in this manual. Improper operation may cause damage to the unit, personal injury, or death.

• Ensure the inverter is installed by qualified personnel.
• Do not mount the inverter on flammable construction materials.
• Ensure adequate ventilation around the inverter for heat dissipation.
• Do not attempt to disassemble or repair the unit yourself. Contact qualified service personnel.
• Always disconnect all power sources (AC, PV, Battery) before performing any maintenance or wiring.

3. Product Overview and Components

Familiarize yourself with the inverter's external components and their functions.

1. LCD display: Shows system status and settings.
2. LED indicators: Provide visual status of AC/INV, CHG, and FAULT.
3. Function keys: Used for navigation and setting adjustments.
4. RS-232 Communication port: For PC communication.
5. Power on/off switch: Main power control.
6. AC input: Connection for grid or generator power.
7. AC output: Connection for home appliances.
8. Safety (Earth) ground: Essential for safety.
9. Circuit breaker: Overcurrent protection.
10. Battery input: Connection for battery bank.
11. PV input: Connection for solar panels.

4. Setup and Installation

4.1 Unboxing

Video 1: Unboxing of the iSolar SMH II 4.2/7KW model, showing the packaging and initial view of the inverter. It highlights the built-in MPPT charge controller and high voltage PV array open circuit voltage (450Vdc).

4.2 Mounting the Unit

Consider the following points before selecting where to install:

• Do not mount the inverter on flammable construction materials.
• Mount on a solid surface.
• Install this inverter at eye level in order to allow the LCD display to be read at all times.
• For proper air circulation to dissipate heat, allow a clearance of approx. 20 cm to the side and approx. 50 cm above and below the unit.
• 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.
• Be sure to keep other objects and surfaces as shown in the diagram to guarantee sufficient heat dissipation and to have enough space for removing wires.

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

4.3 PV Connection

When selecting proper PV modules, please be sure to consider below parameters:

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

4.4 Battery Connection

The 2.2KW model supports a 12VDC system, and the 3.2KW model supports a 24VDC system. Refer to Figure 6 for battery connection diagrams.

Note:

• 2.2kW and 3.2kW models require a connected battery for operation.
• 4.2kW and 6.2kW models can operate without a battery, provided the PV voltage is an extra 160V.

4.5 System Diagram

5. Operation

5.1 LCD Display and Function Keys

5.2 Monitoring and Control

The inverter supports monitoring and control via the SmartESS App, available for iOS and Android devices. Note that the WIFI/GPRS data acquisition module needs to be purchased separately.

5.3 Pure Sine Wave Output

The inverter provides a pure sine wave output, which has the same voltage waveform as the grid. This ensures high-quality AC power with higher efficiency, stable output, and high compatibility with various appliances.

6. Specifications

The following table details the technical specifications for various EASUN Hybrid Solar Inverter models.

7. Maintenance

Regular maintenance ensures the longevity and optimal performance of your inverter. Always disconnect all power sources before maintenance.

• Cleaning: Keep the inverter's vents and surfaces clean and free from dust and debris to ensure proper heat dissipation. Use a dry cloth for cleaning.
• Connections: Periodically check all electrical connections (PV, battery, AC input/output) for tightness and signs of corrosion.
• Environment: Ensure the installation environment remains within the specified temperature and humidity ranges.
• Firmware Updates: Check the manufacturer's website or SmartESS app for any available firmware updates to improve performance or add features.

8. Troubleshooting

If you encounter issues with your inverter, refer to the LED indicators and LCD display for error codes or messages. Common issues and general troubleshooting steps include:

• No Power: Check all circuit breakers, battery connections, and AC input. Ensure the power switch is ON.
• No Output: Verify input power sources (PV, battery, AC grid). Check for overload or short circuit conditions.
• Fault/Warning LED: Consult the LCD display for specific error codes and refer to the full product manual (if available) for detailed explanations and solutions.
• Inconsistent Performance: Ensure proper ventilation and operating temperature. Check for loose connections.

For persistent issues, contact customer support with your model number and a description of the problem.

9. User Tips

• Battery Sizing: Ensure your battery bank is adequately sized for your power consumption to maximize backup time and battery life.
• PV Array Matching: Carefully match your solar panel array voltage and power to the inverter's specifications for optimal MPPT performance.
• Monitoring: Utilize the SmartESS App for remote monitoring to keep track of your system's performance and quickly identify any potential issues.
• Ventilation: Always ensure the inverter has sufficient clearance for airflow, especially in warmer climates, to prevent overheating.

10. Warranty and Support

For warranty information, technical support, or service requests, please refer to the official EASUN POWER website or contact your local distributor. Keep your purchase receipt and product serial number handy when contacting support.