FlexSolar YL-F120-US
FlexSolar 120W Portable ETFE Solar Panel User Manual
Model: YL-F120-US
Introduction
The FlexSolar 120W Portable ETFE Solar Panel is designed to provide sustainable energy for charging various power stations and smart devices. Featuring advanced monocrystalline cells and durable ETFE lamination, this foldable solar panel offers high efficiency and robust performance in diverse outdoor conditions. Its compact design ensures portability, making it ideal for camping, RV trips, and emergency power needs.
This manual provides essential information for setting up, operating, and maintaining your FlexSolar 120W solar panel, ensuring optimal performance and longevity.
Package Contents

Figure 1: FlexSolar 120W Portable ETFE Solar Panel and included accessories.
The package includes the 120W solar panel, a 4-in-1 adapter cable, two adjustable brackets, and four carabiners.
- 1x FlexSolar 120W Portable ETFE Solar Panel
- 1x 4-in-1 Adapter Cable (MC-4 to XT60, Anderson, 5.5*2.1mm, 8mm)
- 2x Adjustable Brackets
- 4x Carabiners
- 1x User Manual
Setup
Setting up your FlexSolar 120W solar panel is quick and easy. Follow these steps to prepare your panel for charging.
- Unfold the Solar Panel: Carefully unfold the three panels from their handbag design. The unfolded dimensions are approximately 51.7 x 23.8 x 0.1 inches.
- Attach the Brackets: Insert the adjustable brackets into the designated slots on the back of the solar panel. These brackets allow you to angle the panel for optimal sun exposure.
- Position the Panel: Place the solar panel in a location with direct sunlight. For best results, ensure the panel is angled at approximately 90 degrees to the sun's rays.
- Connect the Adapter Cable: Connect the MC-4 connectors from the solar panel to the corresponding MC-4 connectors on the 4-in-1 adapter cable.
- Connect to Power Station: Insert the appropriate adapter end (XT60, Anderson, 5.5*2.1mm, or 8mm) of the 4-in-1 adapter cable into the input port of your compatible power station.
Video 1: Official FlexSolar setup and connection guide for the 120W portable solar panel. This video demonstrates how to unfold the panel, attach the kickstands, and connect it to a portable power station using the included adapter cable.

Figure 2: The adjustable kickstand allows for optimal angling towards the sun, maximizing energy capture.
Operating Instructions
Once set up, your FlexSolar 120W panel is ready to convert sunlight into usable power.
- Smart Charging: The panel features an intelligent chip that automatically identifies connected devices and adjusts the output current for the fastest possible charging speed.
- Charging Status Indicator: An integrated LED light indicates the charging status. A red light signifies that the solar panels are actively charging your devices.
- Safety Features: The design incorporates overcurrent, overheating, and short-circuit protection to ensure safe charging for your devices.
- Compatibility: The 20V DC output and universal MC-4 connector make this panel compatible with a wide range of mid-sized solar generators, including popular models like Explorer 1000/1500, Bluetti AC200P, EcoFlow DELTA 2, Yeti 1500X, and Renogy Phoenix.

Figure 3: Universal compatibility diagram illustrating how the solar panel connects to different power stations using the adapter cable.

Figure 4: Example charging times for different portable power stations when connected to the FlexSolar 120W panel.
Maintenance
Proper maintenance ensures the longevity and efficiency of your FlexSolar panel.
- Cleaning: The ETFE + PET lamination provides self-cleaning properties. For optimal performance, occasionally wipe the surface of the solar panels with a soft, damp cloth to remove any accumulated dust or debris. Avoid abrasive cleaners or harsh chemicals.
- Storage: When not in use, fold the solar panel into its compact handbag design and store it in a dry, cool place away from direct sunlight and extreme temperatures.
- Inspection: Periodically inspect the panel and cables for any signs of damage, wear, or corrosion. Ensure all connections are secure before use.

Figure 5: Cross-section view illustrating the durable multi-layer construction of the FlexSolar panel, including the ETFE protective film.

Figure 6: The panel's IP68 rating ensures resistance to dust, sandstorms, and heavy rain, making it suitable for various outdoor environments.
Troubleshooting
If you encounter issues with your FlexSolar 120W solar panel, consider the following common troubleshooting steps:
- No Power Output:
- Ensure the panel is in direct sunlight and not obstructed by shadows.
- Verify all cable connections (MC-4, adapter cable, and power station input) are secure and correctly inserted.
- Check the LED indicator on the panel; if it's not red, reposition the panel or check connections.
- Confirm your power station is compatible with the panel's output specifications.
- Low Power Output:
- Adjust the panel's angle to face the sun directly. The optimal angle is typically 90 degrees to the sun's rays.
- Clean the panel surface to remove any dirt, dust, or debris that might be blocking sunlight.
- Ensure no partial shading is occurring on the panel, as even small shadows can significantly reduce output.
- Consider environmental factors such as cloud cover or haze, which can naturally reduce solar efficiency.
- Connection Issues:
- Double-check that the correct adapter end is used for your specific power station model.
- Inspect cables for any visible damage or kinks.
If problems persist after following these steps, please refer to the Support section for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Brand | FlexSolar |
| Model Number | YL-F120-US |
| Maximum Power | 120 Watts |
| Material | Monocrystalline |
| Efficiency | High Efficiency (up to 26% conversion rate) |
| Product Dimensions (Unfolded) | 51.7"L x 23.8"W x 0.1"H |
| Product Dimensions (Folded) | 23.8"L x 18.3"W x 1.0"H |
| Item Weight | 8.8 Pounds (4 kg) |
| Maximum Voltage | 20.9 Volts (DC) |
| AC Adapter Current | 5.7 Amps |
| Connector Type | MC4 (with 4-in-1 adapter cable) |
| Waterproof Rating | IP68 |
| Temperature Resistance | -40°F to 185°F |
| Special Features | Portable, Handbag design, Foldable, Self-cleaning surface |

Figure 7: Detailed dimensions of the FlexSolar 120W solar panel in both unfolded and folded states.
Warranty and Support
FlexSolar is committed to providing high-quality products and excellent customer service.
- Customer Service: If you encounter any problems or have questions regarding your FlexSolar 120W Portable ETFE Solar Panel, please feel free to contact FlexSolar customer support. They aim to reply within 24 hours.
- Protection Plans: Extended protection plans may be available for purchase to cover your product beyond the standard warranty. Please check with your retailer for details on available protection plans.
For the most up-to-date support information, please visit the official FlexSolar website or contact their customer service directly.
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