Loncin EP350-2
Loncin Portable Power Station EP350-2 User Manual
Model: EP350-2
1. Introduction
Thank you for choosing the Loncin Portable Power Station EP350-2. This device is designed to provide reliable power for various applications, from outdoor adventures to emergency backup. Please read this manual carefully before using the product to ensure safe and optimal operation. Keep this manual for future reference.

Figure 1: Loncin Portable Power Station EP350-2. This image shows the main unit of the power station, highlighting its compact design and various ports.
2. Important Safety Information
WARNING: Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Do not disassemble, repair, or modify the unit.
- Do not place the unit near heat sources or in direct sunlight for extended periods.
- Do not expose the unit to rain or moisture.
- Use only original or certified charging cables and adapters.
- Keep out of reach of children.
- Ensure proper ventilation during use and charging to prevent overheating.
- If the unit emits smoke, strange odors, or unusual noises, stop use immediately and contact support.
3. Package Contents
Please check that all items are included in your package:
- Loncin Portable Power Station EP350-2
- AC Charging Cable
- Car Charging Cable
- User Manual (this document)

Figure 2: Package contents. This image displays the Loncin Portable Power Station along with its AC charging cable, car charging cable, and user manual.
4. Product Overview
The Loncin EP350-2 is a compact and powerful portable power station featuring a 307Wh LiFePO4 battery. It offers multiple output ports and advanced technologies for efficient and safe power delivery.
4.1 Key Features
- High Capacity: 307Wh LiFePO4 battery for extended use.
- Versatile Output: 350W AC rated output (700W peak with SpurFlux technology), 2x USB-C (100W + 65W), 2x USB-A (18W total), and 1x 126W car socket.
- Fast Charging: NitroGo technology allows 245Wh charge in 45 minutes, full charge in 75 minutes. Supports up to 200W solar input.
- Ultra-Quiet Operation: Coldfusion cooling system maintains noise levels at 40dB or less under full load.
- UPS Function: Automatic power switching in 15ms during outages.
- Durable Display: Truesight anti-glare screen with 120° wide viewing angle.
- Adjustable LED Light: Integrated panel with strong, weak, and SOS modes.
- Ergonomic Design: Soft carrying strap for comfortable portability.
4.2 Ports and Indicators

Figure 3: Port layout of the Loncin EP350-2. This diagram illustrates the location of the USB-C ports (65W max, 100W max), cigar socket (126W max), USB-A ports (18W total), and AC outlet (350W).
- USB-C Port (65W max): For charging compatible USB-C devices.
- USB-C Port (100W max): For charging compatible USB-C devices, including laptops.
- Cigar Socket (126W max): For 12V DC devices.
- USB-A Ports (18W total): For charging standard USB-A devices.
- AC Outlet (350W): For powering AC appliances.
- Display Screen: Shows battery level, input/output power, and other status indicators.
- Main Power Button: Turns the unit on/off.
- DC Output Button: Activates/deactivates DC output ports.
- AC Output Button: Activates/deactivates AC output port.
- LED Light Button: Cycles through light modes (strong, weak, SOS).
5. Setup
5.1 Initial Charge
Before first use, fully charge your Loncin EP350-2. This ensures the battery is calibrated and ready for optimal performance.
- Connect the AC charging cable to the power station's input port.
- Plug the other end into a standard wall outlet.
- The display will show charging status. The unit is fully charged when the battery indicator shows 100%.

Figure 4: AC charging. The power station is connected to a wall outlet for charging.
6. Operating Instructions
6.1 Turning On/Off
- To turn on: Press and hold the Main Power Button for 3 seconds.
- To turn off: Press and hold the Main Power Button for 3 seconds.
6.2 Charging the Power Station
The EP350-2 supports multiple charging methods:
6.2.1 AC Wall Charging
Connect the AC charging cable to the power station and a wall outlet. The NitroGo fast charging technology can charge the unit to 80% in approximately 45 minutes, and fully in 75 minutes.
6.2.2 Solar Charging
Connect a compatible solar panel (max 200W input) to the power station's solar input port. Place the solar panel in direct sunlight for optimal charging. The display will show the solar input power.

Figure 5: Solar charging setup. The power station is connected to a solar panel in an outdoor environment.
Video 1: Solar Panel Charging. This video demonstrates how to set up a solar panel to charge the portable power station, highlighting its use in an outdoor setting.
6.2.3 Car Charging
Use the provided car charging cable to connect the power station to your vehicle's 12V/24V cigarette lighter socket. This method is suitable for charging while on the go.
6.3 Using Output Ports
To use any output port, first ensure the main power station is on. Then, activate the specific output section (AC or DC) by pressing its respective button.
6.3.1 AC Output
Press the AC Output Button to activate the AC outlet. Plug in your AC appliances (up to 350W continuous, 700W peak with SpurFlux). Press the button again to turn off AC output.
6.3.2 DC Output (USB-A, USB-C, Car Socket)
Press the DC Output Button to activate the USB-A, USB-C, and car socket ports. Plug in your compatible devices. Press the button again to turn off DC output.
Video 2: General Operation. This video illustrates the general use of the portable power station, showing how to connect and power various devices like a fan and smartphone in an outdoor setting.
6.4 UPS Function (Uninterruptible Power Supply)
The EP350-2 features an ultra-fast UPS function. When connected to an AC wall outlet and powering devices, if the main power supply fails, the power station will automatically switch to battery power within 15 milliseconds. This prevents data loss and ensures continuous operation for sensitive electronics.
6.5 App Control
The Loncin EP350-2 can be controlled via a dedicated smartphone application. This allows for remote monitoring of battery status, input/output power, and adjustment of settings.

Figure 6: Smartphone app interface. This image shows the user interface of the Loncin app, displaying battery status, power flow, and settings.
6.6 LED Light Panel
The integrated LED light panel provides illumination for various situations. Press the LED Light Button to cycle through different modes:
- Strong: Maximum brightness for general illumination.
- Weak: Lower brightness for ambient lighting or to conserve power.
- SOS: Flashing signal for emergency situations.

Figure 7: Adjustable LED light panel. The power station's side panel illuminates, demonstrating its strong, weak, and SOS light modes.
7. Maintenance
7.1 Cleaning
Wipe the unit with a dry, soft cloth. Do not use abrasive cleaners or solvents. Ensure all ports are free of dust and debris.
7.2 Storage
Store the power station in a cool, dry place away from direct sunlight and extreme temperatures. For long-term storage, charge the unit to 50-80% every 3-6 months to prolong battery life.
7.3 Battery Care
The EP350-2 uses an EV-grade LiFePO4 battery, known for its longevity and safety. To maximize its lifespan, avoid fully discharging the battery frequently and keep it within recommended operating temperatures.

Figure 8: LiFePO4 battery and BMS. This image shows the internal LiFePO4 battery cells and the Battery Management System (BMS) for enhanced safety and durability.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not turn on | Battery is completely discharged; Power button not pressed correctly. | Charge the unit; Press and hold the Main Power Button for 3 seconds. |
| AC output not working | AC output not activated; Appliance exceeds 350W; Overload protection triggered. | Press the AC Output Button; Check appliance wattage; Disconnect and restart. |
| DC output not working | DC output not activated; Device not compatible. | Press the DC Output Button; Ensure device is compatible with USB-A/C or 12V. |
| Slow charging via solar panel | Insufficient sunlight; Panel not positioned correctly; Panel output too low. | Ensure direct sunlight; Adjust panel angle; Check panel specifications (min 30W output required for activation). |
| Unit overheating | Poor ventilation; Excessive load. | Ensure clear airflow around the unit; Reduce connected load. |
9. Specifications
| Feature | Detail |
|---|---|
| Model | EP350-2 |
| Battery Capacity | 307Wh (LiFePO4) |
| AC Output | 100V, 350W (Rated), 700W (SpurFlux Peak) |
| USB-C Output 1 | 100W Max |
| USB-C Output 2 | 65W Max |
| USB-A Output | 2 x 18W (Total) |
| Car Socket Output | 126W Max |
| AC Input (Charging) | Fast Charging (80% in 45 min, 100% in 75 min) |
| Solar Input | Max 200W (12-30V, 8A) |
| Car Input (Charging) | 12V/24V, 8A Max |
| UPS Switching Time | 15ms |
| Noise Level | ≤40dB (at 1m, 100% load) |
| Dimensions (L x W x H) | 26 cm x 22 cm x 15 cm |
| Weight | 5.2 kg |
| Operating Temperature | 0°C to 40°C (32°F to 104°F) |
| Charging Temperature | 0°C to 40°C (32°F to 104°F) |
10. Warranty and Support
The Loncin Portable Power Station EP350-2 comes with a 5-year manufacturer's warranty. This warranty covers defects in materials and workmanship under normal use. It does not cover damage caused by misuse, accidents, unauthorized modifications, or natural disasters.
For technical support, warranty claims, or any questions regarding your product, please contact Loncin customer service through the retailer where you purchased the product or visit the official Loncin website for contact information.
Please have your purchase receipt and product model number (EP350-2) ready when contacting support.
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