1. Introduction
This manual provides essential information for the safe and efficient operation of your WZRELB 3000W Split Phase Pure Sine Wave Inverter. Please read all instructions carefully before installation and use. This inverter converts 48V DC power to 120V/240V AC power, suitable for various applications including off-grid systems, mobile businesses, RVs, and emergency power backup.
2. Setup and Installation
2.1 Unboxing the Inverter
Carefully open the packaging and remove the inverter and its accessories. Verify that all components are present:
- 1x WZRELB 3000W Split Phase Pure Sine Wave Inverter
- Battery cables (7AWG)
- Fuses
- User Manual

Image: The WZRELB 3000W Split Phase Pure Sine Wave Inverter shown with included battery cables, fuses, and user manual.
2.2 AC Panel Overview
The AC panel provides multiple output options for your appliances. It features two 120V AC outlets, one 240V AC universal socket, and a hardwire terminal for direct wiring to a house panel.
- AC1 Output (120VDC): Supports up to 1500W.
- AC2 Output (120VDC): Supports up to 1500W.
- 240VAC Output: Supports up to 3000W.
- Hardwire Terminal: Provides multiple output options (L1+L2=240V, L1+N=120V, L2+N=120V).
- Switch: Main power switch for AC output.
- Ground Wire Connector: For safety grounding.

Image: Detailed view of the inverter's AC output panel, highlighting the 120V and 240V outlets, hardwire terminal, and power switch.
2.3 DC Panel Overview
The DC panel is located at the rear of the inverter and includes the battery connection terminals and cooling fans.
- Positive (+) Terminal: Red terminal for positive battery connection.
- Negative (-) Terminal: Black terminal for negative battery connection.
- Spark-Proof Nut: A safety feature for connecting the positive cable.
- Cooling Fans: Two 90mm x 90mm fans for intelligent temperature control.

Image: Rear view of the inverter showing the DC input terminals (positive and negative) and the dual cooling fans.
2.4 Battery Connection Guide
Follow these steps to safely connect the inverter to your 48V battery system. Ensure all connections are tight to maintain stable current.
- Connect Negative Cable First: Connect the black cable to the negative terminal of your battery, then connect the other end to the negative terminal of the inverter.
- Contacting Spark-Proof Nut: After connecting the red cable to the positive terminal of your battery, briefly touch the other side of the red cable to the spark-proof nut on the inverter for 3-5 seconds. This helps prevent sparks during final connection.
- Connect Positive Cable: Securely connect the red cable to the positive terminal of the inverter to complete the wiring.

Image: Visual guide demonstrating the correct sequence for connecting battery cables to the inverter, emphasizing the spark-proof nut for safety.
2.5 Installation Video Guide
Video: This video provides a comprehensive guide to unboxing, identifying AC and DC panels, and the installation process for the WZRELB Split Phase Pure Sine Wave Inverter. It includes detailed steps for battery connection and an overview of the inverter's features.
3. Operating Instructions
3.1 LCD Display Functions
The LCD display provides real-time monitoring of the inverter's status and performance. Key indicators include:
- Inverter Working Status: Shows if the inverter is operating normally or if there's a fault.
- Battery Voltage and Capacity: Displays the current battery voltage and remaining capacity.
- Internal Temperature: Shows the temperature inside the inverter.
- AC1 120V Output: Displays voltage and amperage for the first 120V AC circuit.
- AC2 120V Output: Displays voltage and amperage for the second 120V AC circuit.
- 240V Output: Shows the output voltage and frequency (60Hz) for the 240V AC circuit.

Image: The inverter's LCD screen, illustrating various parameters such as working status, battery level, internal temperature, and AC output details for both 120V and 240V circuits.
3.2 Typical Applications
The WZRELB 3000W Split Phase Pure Sine Wave Inverter is versatile and can power a wide range of devices and systems. It is ideal for:
- Off-grid living and remote cabins
- Emergency power backup for homes
- Mobile businesses and RVs
- Powering demanding loads like air conditioners, refrigerators, and power tools
- Compatibility with various battery types including AGM, gel, flooded, lead-acid, and lithium-ion.

Image: The inverter connected to a battery, demonstrating its capability to power multiple household appliances simultaneously, such as a mini-fridge, air fryer, and cooking devices.
4. Maintenance
To ensure optimal performance and longevity of your inverter, regular maintenance is recommended:
- Keep Clean: Periodically clean the exterior of the inverter with a dry cloth. Ensure ventilation openings and cooling fans are free from dust and debris.
- Ventilation: Ensure the inverter is installed in a well-ventilated area to allow for proper heat dissipation by the intelligent temperature-controlled fans.
- Connection Check: Regularly inspect all electrical connections (battery, AC input/output) for tightness and signs of corrosion.
- Battery Health: Monitor your battery's health and charge levels according to the battery manufacturer's guidelines.
5. Troubleshooting
The inverter is equipped with multiple protection features to ensure safe operation. If a fault occurs, the LCD display will indicate the issue. Common protections include:
- Input Low Voltage Protection: Shuts down the inverter if the DC input voltage drops below a safe threshold.
- Input High Voltage Protection: Shuts down the inverter if the DC input voltage exceeds a safe threshold.
- Overload Protection: Activates if the connected load exceeds the inverter's rated capacity.
- Temperature Protection: Engages if the internal temperature of the inverter becomes too high.
- Short Circuit Protection: Protects against short circuits in the output.
- Battery Reverse Protection: Prevents damage from incorrect battery polarity connection.
Refer to the LCD display for specific error codes and consult the detailed troubleshooting section in the full user manual for resolution steps.
Video: This video demonstrates the various protection features of the WZRELB Split Phase Pure Sine Wave Inverter, including soft start, overload protection, low voltage protection, over voltage protection, and short circuit protection. It shows how the inverter responds to these conditions.
6. Specifications
| Feature | Specification |
|---|---|
| Rated Continuous Power | 3000W |
| Surge Output Power | 6000W |
| DC Input Voltage | 48V |
| DC Input Voltage Range | 40~60VDC |
| AC Output Voltage (Nominal) | 120VAC and 240VAC |
| AC Output Frequency | 60±2Hz |
| AC Output Waveform | Pure Sine Wave |
| Conversion Efficiency | ≥91.6% |
| Operating Temperature Range | 32℉-104℉ / 0℃-70℃ |
| Cooling Method | Intelligent Temperature Controlled Fan |
| Product Dimensions | 17.2 x 9.9 x 5.3 inches |
| Item Weight | 15.8 pounds |
7. Warranty and Support
Your WZRELB 3000W Split Phase Pure Sine Wave Inverter comes with a 12-month warranty. Additionally, lifetime technical support is provided to assist you with any questions or issues you may encounter. For support, please refer to the contact information provided in your user manual or on the WZRELB official website.





