1. Introduction
Thank you for choosing the LVYUAN 4000 Watt Power Inverter. This device converts 24V DC power from your battery to 110V/120V AC power, enabling you to operate standard household appliances and electronics in various off-grid settings. It is ideal for use in RVs, trucks, solar inverter systems, camping, and other mobile or remote power needs. Please read this manual thoroughly before installation and operation to ensure safe and efficient use.
2. Safety Information
The LVYUAN 4000 Watt Power Inverter is designed with multiple safety protections to ensure reliable operation. Adhere to the following guidelines:
- Over/Under Voltage Protection: Automatically shuts down if input voltage is too high or too low.
- Overload Protection: Prevents damage from excessive power draw.
- Overheating Protection: Built-in intelligent cooling fan activates when internal temperature exceeds 104°F (40°C) or load exceeds 45%.
- Short Circuit Protection: Safeguards against electrical shorts.
- Reverse Polarity Protection: Protects against incorrect battery connections.
- Sound Alert Protection: Provides audible warnings for certain fault conditions.
Always ensure proper ventilation around the inverter. Do not expose the inverter to water, rain, or excessive moisture. Keep away from flammable materials.
3. Package Contents
Verify that all items are present in your package:
- LVYUAN 4000 Watt Power Inverter
- Wireless Remote Controller (Note: Requires 12V 23A battery, not included)
- 2 Pairs of Battery Cables (Red for positive, Black for negative)
- Instruction Manual (This document)
4. Product Features
- High Power Output: Delivers 4000W continuous power and 8000W peak power.
- Versatile AC Outlets: Equipped with 4 standard AC outlets and a hardwire terminal for diverse appliance connections.
- Real-Time LCD Display: Monitors battery voltage, output voltage, load capacity, and displays alerts.
- Wireless Remote Control: Allows convenient operation from a distance.
- Smart Cooling System: Dual intelligent cooling fans ensure optimal heat dissipation and quiet operation.
- Durable Construction: Features a sturdy aluminum alloy body for enhanced durability.

Figure 1: LVYUAN 4000 Watt Power Inverter with included accessories.

Figure 2: Detailed view of the inverter's front and back panels.
5. Setup and Installation
5.1 Connecting to a 24V Battery System
- Ensure the inverter is turned OFF and disconnected from any AC loads.
- Connect the red battery cable to the positive (+) terminal of the 24V battery.
- Connect the other end of the red cable to the positive (+) terminal on the inverter.
- Connect the black battery cable to the negative (-) terminal of the 24V battery.
- Connect the other end of the black cable to the negative (-) terminal on the inverter.
- Ensure all connections are tight and secure to prevent arcing or overheating.
Important: Use appropriate gauge cables for your installation to handle the current draw. The included cables are suitable for typical applications, but longer runs or higher loads may require thicker cables (not included).

Figure 3: Example of inverter connected to a vehicle battery.
6. Operating Instructions
6.1 Powering On/Off
- After securing all battery connections, press the ON/OFF switch on the inverter to turn it on. The LCD display will illuminate.
- To turn off the inverter, press the ON/OFF switch again.
6.2 Using the LCD Display
The LCD display provides real-time information about the inverter's status:
- Battery Capacity: Shows the remaining charge in your battery.
- Battery Voltage: Displays the current DC input voltage.
- Output Frequency: Indicates the AC output frequency (e.g., 50Hz or 60Hz).
- Output Voltage: Shows the current AC output voltage (e.g., 110V or 120V).
- Load Capacity: Illustrates the percentage of the inverter's capacity being used.
Error codes (E-1 to E-6) will also be displayed for various protection triggers (low input voltage, high input voltage, over temperature, overload, short circuit, repeated faults).

Figure 4: Understanding the LCD display indicators.
6.3 Connecting AC Appliances
Plug your 110V/120V AC appliances into the 4 standard AC outlets on the inverter. Ensure the total wattage of your appliances does not exceed the inverter's continuous power rating (4000W).
6.4 Using the Wireless Remote Control
The included wireless remote control allows you to turn the inverter ON or OFF from a distance, which is convenient for installations in hard-to-reach locations like RV cabinets or truck beds. Insert a 12V 23A battery (not included) into the remote before use.

Figure 5: Wireless remote control for convenient operation.
7. Maintenance
- Regularly check all electrical connections for tightness and corrosion.
- Keep the inverter clean and free from dust and debris to ensure proper airflow for the cooling fans.
- Ensure the cooling vents are not obstructed.
- Store the inverter in a cool, dry place when not in use.
8. Troubleshooting
If the inverter is not functioning as expected, check the following:
- No Power/No Display: Verify battery connections are secure and the battery has sufficient charge. Check the inverter's ON/OFF switch.
- Audible Alarm/Error Code on LCD: Refer to the error code displayed on the LCD for specific protection triggers (e.g., low voltage, overload, overheating). Address the underlying issue (e.g., recharge battery, reduce load, allow cooling).
- Appliance Not Working: Ensure the appliance is within the inverter's wattage limits. Check the appliance's power cord and functionality.
- Remote Control Not Working: Check the battery in the remote control (12V 23A). Ensure the remote is within range and not obstructed.
If issues persist after basic troubleshooting, contact LVYUAN customer support.
9. Specifications
| Feature | Specification |
|---|---|
| Model Number | LY-MSW4000W-24V |
| Continuous Power | 4000 Watts |
| Peak Power | 8000 Watts |
| Input Voltage | 24V DC |
| Output Voltage | 110V/120V AC |
| AC Outlets | 4 |
| USB Output | 5V |
| Product Dimensions | 16.3 x 7.04 x 5.51 inches |
| Item Weight | 9.63 pounds |
| Power Source | Solar and Battery Powered |
| Recommended Uses | Camping, Home, Office, Outdoor, RV, Vehicle |

Figure 6: Inverter dimensions.
10. Warranty and Support
For warranty information, technical support, or any questions regarding your LVYUAN 4000 Watt Power Inverter, please refer to the contact information provided with your purchase or visit the official LVYUAN website. Keep your purchase receipt for warranty claims.





