1. Introduction
This manual provides essential information for the safe and efficient installation, operation, and maintenance of your ZQFEE 4KW 24V 110/120V Pure Sine Wave MPPT Solar Inverter. This off-grid inverter is designed to convert DC power from solar panels or batteries into stable AC power for various home and remote applications. Please read this manual thoroughly before installation and use.
2. Safety Instructions
- Electrical Safety: Installation and maintenance must be performed by qualified personnel. Ensure all power sources are disconnected before working on the inverter.
- Ventilation: Install the inverter in a well-ventilated area to prevent overheating. Maintain adequate clearance around the unit.
- Environment: Avoid installing the inverter in direct sunlight, high humidity, or dusty environments. Keep away from flammable materials.
- Battery Safety: Always connect batteries with correct polarity. Wear protective eyewear and gloves when working with batteries.
- Grounding: Ensure the inverter is properly grounded according to local electrical codes.
- Children: Keep the inverter out of reach of children.
3. Product Overview
3.1 Key Features
- High Efficiency: 4KW off-grid solar inverter with MPPT technology for maximum solar energy conversion.
- Pure Sine Wave Output: Provides clean and stable power for sensitive electronics and appliances.
- User-Friendly LCD Display: Easy monitoring of system performance and battery status at a glance.
- Versatile Compatibility: Ideal for various applications including home use, RVs, and remote locations.
- Robust Safety Features: Built-in protection against overload, short circuit, and over-temperature for reliable operation.
3.2 Specifications
| Parameter | Value |
|---|---|
| Model Number | HGX |
| Output Current | 20A |
| Size | 400*250*89MM |
| Weight | 10KG (22 pounds) |
| Output Frequency | 50/60Hz |
| Supported Battery Types | Lead-acid, Lithium, LiFePO4, and others |
| Input Voltage | 110/120V |
| Selectable Voltage Range | 90-140 VAC |
| Wave Form | Pure Sine Wave |
| Battery Voltage | 24V |
| MPPT Voltage Range | 55-280VDC |
| Max PV Array Power | 6500W |
| Max. PV Array Open Circuit Voltage | 350VDC |
| Max Charging Current | 140A (AC charger + solar charger) |
3.3 Product Components and System Overview
Figure 3.3.1: System overview of the ZQFEE 4KW Solar Inverter, illustrating connections for solar power, generator, utility input, battery storage, and output to home appliances.
Figure 3.3.2: The inverter's compatibility with various battery types, including Flooded, Gel, Lithium-iron phosphate, Lithium-ion, AGM/Sealed, and user-defined settings.
Figure 3.3.3: Examples of typical applications for the ZQFEE Solar Inverter, demonstrating its ability to power a wide range of household and office electronics.
4. Installation
4.1 Mounting the Inverter
Choose a suitable location for mounting the inverter. It should be a dry, well-ventilated area, protected from direct sunlight and moisture. Ensure there is sufficient space around the unit for proper airflow and heat dissipation.
4.2 Wiring Connections
All wiring must comply with local electrical codes. Use appropriate wire gauges for all connections to prevent overheating and ensure optimal performance.
- Battery Connection: Connect the 24V battery bank to the designated battery input terminals on the inverter. Ensure correct polarity (positive to positive, negative to negative).
- PV Input Connection: Connect the solar panel array to the PV input terminals. Observe the maximum PV array open circuit voltage (350VDC) and MPPT voltage range (55-280VDC).
- AC Input Connection: If using a generator or utility grid as an AC input, connect it to the AC input terminals.
- AC Output Connection: Connect your loads (appliances) to the AC output terminals.
- Communication Port: The RS458/RS232 communication port allows for data monitoring and control.
Figure 4.2.1: Detailed view of the inverter's connection ports, including PV input, AC input, AC output, communication port, and battery input terminals.
4.3 Solar Panel Wiring Methods
Proper wiring of solar panels is crucial for optimal performance and safety. The inverter supports both series and parallel configurations.
Figure 4.3.1: Solar panel wiring methods. In series: Increases voltage, ensuring the total voltage is less than the inverter's maximum input voltage. In parallel: Increases current, ensuring the total current does not exceed the inverter's maximum input current. Use PV cable dimensions of 6-8A/mm².
- Series Connection: Connect panels in series to increase the total voltage. Ensure the combined open circuit voltage of the array does not exceed the inverter's maximum PV input voltage (350VDC).
- Parallel Connection: Connect panels in parallel to increase the total current. Ensure the combined current does not exceed the inverter's maximum PV input current.
- Cable Sizing: Use PV cables with dimensions of 6-8A/mm² for optimal performance and safety.
5. Operation
5.1 Initial Startup
- After completing all wiring connections, ensure they are secure.
- Turn on the battery breaker first.
- Turn on the PV array breaker (if applicable).
- Turn on the AC input breaker (if applicable).
- Finally, turn on the inverter's power switch. The LCD display will illuminate.
5.2 LCD Display and Monitoring
The user-friendly LCD display provides real-time information on system performance, battery status, input/output voltages, and current. Use the touch buttons to navigate through different display screens and monitor operational parameters. Refer to the on-screen indicators for charging status, load levels, and any warning messages.
6. Maintenance
Regular maintenance ensures the longevity and optimal performance of your inverter.
- Cleaning: Periodically clean the inverter's exterior with a dry cloth. Ensure ventilation openings are free from dust and debris. Do not use liquid cleaners.
- Connection Check: Annually inspect all wiring connections for tightness and signs of corrosion. Re-tighten if necessary.
- Environmental Check: Ensure the installation environment remains within specified conditions (temperature, humidity).
- Battery Inspection: Regularly check battery terminals for corrosion and ensure proper ventilation for lead-acid batteries.
7. Troubleshooting
This section provides solutions for common issues. For problems not listed here, contact customer support.
| Problem | Possible Cause | Solution |
|---|---|---|
| Inverter not turning on | No battery power; loose connections; inverter switch off. | Check battery voltage and connections; ensure inverter switch is ON. |
| No AC output | Overload; short circuit; output breaker tripped; low battery voltage. | Reduce load; check for short circuits; reset output breaker; charge batteries. |
| PV charging not active | Insufficient sunlight; PV array disconnected; PV voltage out of range. | Check solar conditions; verify PV connections; ensure PV voltage is within MPPT range. |
| Error code on LCD | Specific system fault (e.g., over-temperature, battery fault). | Refer to the inverter's specific error code list (if available) or contact support. |
8. Warranty and Support
For warranty information, technical support, or service inquiries, please contact your retailer or the manufacturer directly. Keep your purchase receipt and product model number (HGX) handy for faster assistance.