1. Introduction
This instruction manual provides essential information for the safe and efficient use of your Topsolar Flexible Solar Panel 100W. This monocrystalline bendable solar panel is designed for various off-grid applications, including RVs, boats, cabins, vans, cars, and other surfaces where traditional rigid panels may not be suitable. Please read this manual thoroughly before installation and operation to ensure optimal performance and longevity of your solar panel.

Image 1: Topsolar Flexible Solar Panel 100W, showcasing its sleek design.
2. Product Features
- Good Flexibility: The panel can bend up to a minimum arc radius of 40cm (15.75 inches), allowing installation on curved or uneven surfaces such as trailers, boats, RVs, and roofs.
- Lightweight and Easy to Install: With a thickness of approximately 0.1 inches and a weight of approximately 3.97 lbs (1.8 kg), this panel is highly portable and easy to handle, transport, and install.
- High Conversion Efficiency: Utilizes high-efficiency monocrystalline solar cells with unique back contact technology, increasing conversion efficiency by up to 50% compared to ordinary panels by minimizing shading from electrodes.
- High-Quality Material: Constructed with an ETFE surface for superior light transmittance and extended service life. The TPT backplane ensures good heat dissipation, water resistance, high-temperature resistance, and ease of cleaning.
- Wide Range of Application: Ideal for charging 12-volt batteries. Multiple panels can be connected in series for 24V or 48V battery systems. Requires a charge controller for battery protection.

Image 2: Panel dimensions (approximately 39.4 x 23.6 inches), ultra-light (approximately 4.19 lbs), ultra-thin (approximately 0.08 inches), and high solar utilization.

Image 3: Close-up view demonstrating the water-resistant properties of the panel's surface.

Image 4: Examples of common applications including RVs, yachts, agricultural vehicles, sightseeing vehicles, roofs, and camping setups.
3. Safety Information
Observe the following safety precautions during installation and operation:
- Avoid excessive bending or distortion of the solar panel, as this can lead to damage to internal chips.
- Do not step on or hit the panel with heavy objects to prevent pressure damage.
- When hanging the panel, ensure the back is fully supported to prevent damage from excessive crosswind or stress.
- Always disconnect the solar panel from the charge controller and battery before performing any maintenance or installation work.
- Ensure proper polarity when connecting the panel to a charge controller and battery. Incorrect connections can cause damage to the system.
- Install the panel in a well-ventilated area to prevent overheating, especially if mounted directly to a surface without an air gap.
- Wear appropriate personal protective equipment (PPE) such as gloves and eye protection during installation.
- Keep the panel away from flammable materials and sources of ignition.
4. Package Contents
The package for your Topsolar Flexible Solar Panel 100W typically includes:
- 1x Topsolar Flexible Solar Panel 100W
- MC4 Connector Kit (pre-attached cables)
- User Manual (this document)
- Note: Solar panel mounting brackets or Z-brackets are often sold separately or as optional accessories.
5. Setup and Installation
Proper installation is crucial for the performance and safety of your solar panel. Consider the following steps:
- Site Selection: Choose a location that receives maximum direct sunlight throughout the day, free from shading by trees, buildings, or other obstructions.
- Mounting: The flexible design allows for various mounting options. The panel can be adhered directly to a surface using appropriate sealant/adhesive, or secured using the integrated stainless eyelets. Ensure the mounting surface is clean, dry, and structurally sound. If using adhesive, apply evenly to ensure full contact and prevent air pockets.
- Wiring Connections:
- Connect the MC4 connectors from the solar panel to your charge controller. Ensure correct polarity: positive (+) to positive, negative (-) to negative.
- Connect the charge controller to your battery bank.
- If using an inverter, connect it to the battery bank (not directly to the charge controller or solar panel).
- System Check: After all connections are made, verify that the charge controller indicates proper charging from the solar panel to the battery.

Image 5: Detailed view of MC4 connectors, sealed junction box, stainless eyelets for mounting, and the multi-layer construction (ETFE, EVA, Cell, EVA, TPT).

Image 6: Wiring diagram showing connections from the semi-flexible solar panel to a PWM charge controller, then to a battery, and finally to a power inverter. Note: Charge controller, battery, and power inverter are purchased separately.
Installation Video Guide
Video 1: Official Topsolar video demonstrating the unpacking and installation process of the flexible solar panel. This video provides visual guidance on handling, measuring, and securing the panel.
6. Operation
Once installed, your Topsolar Flexible Solar Panel will convert sunlight into electrical energy. This energy is then regulated by the charge controller before being stored in your battery bank.
- Ensure the panel is exposed to direct sunlight for optimal power generation.
- Monitor your charge controller for charging status and battery voltage.
- Avoid shading any part of the panel, as even partial shading can significantly reduce power output.
7. Maintenance
Regular maintenance helps ensure the long-term performance of your solar panel:
- Cleaning: Periodically clean the surface of the solar panel with a soft cloth and mild, non-abrasive cleaner to remove dirt, dust, and debris. Ensure the panel is cool before cleaning.
- Inspection: Regularly inspect the panel for any physical damage, such as cracks, delamination, or discoloration. Check all wiring and connections for corrosion or loose contacts.
- Shading: Keep the panel free from any obstructions that might cause shading, such as leaves, snow, or accumulated dirt.
8. Troubleshooting
If you experience issues with your solar panel, consider the following troubleshooting steps:
- Low Power Output:
- Check for shading on the panel surface.
- Clean the panel surface if it's dirty.
- Verify all connections are secure and free from corrosion.
- Ensure the panel is oriented correctly towards the sun.
- Check the charge controller for error codes or abnormal readings.
- No Charging:
- Confirm all wiring connections are correct and secure, especially polarity.
- Test the voltage output directly from the solar panel (under sunlight) to ensure it's producing power.
- Check the charge controller's functionality.
- Ensure the battery is not fully charged, as the controller may stop charging if the battery is full.
- Panel Damage: If physical damage is observed, discontinue use and contact customer support.
9. Specifications
| Specification | Value |
|---|---|
| Brand | Topsolar |
| Model Number | TOPSFS-100B |
| Material | Monocrystalline Silicon |
| Maximum Power | 100 Watts |
| Maximum Voltage | 12 Volts (suitable for 12V systems, can be configured for 24V/48V) |
| Product Dimensions (L x W x H) | 45.28" x 25.59" x 0.1" (approx. 115cm x 65cm x 0.25cm) |
| Item Weight | 3.97 lbs (1.8 kg) |
| Efficiency | High efficiency (up to 50% more efficient than ordinary panels) |
| Connector Type | MC4 |
| Manufacturer | Topsolar |
10. Warranty and Support
The Topsolar Flexible Solar Panel 100W comes with a 5-year warranty. For warranty claims, technical support, or any questions not covered in this manual, please contact Topsolar customer service through your retailer or the official Topsolar website.