- Introduction
- Design and Build
- Setup and Deployment
- Power output and charging options
- Performance in the Field
- Portability in Action
- Pricing and Value
- Additional Features
- Pros and Cons
- Conclusion
Introduction
For campers, hikers, and off-grid enthusiasts, reliable power is as essential as a good tent. The FlexSolar 40W foldable solar panel offers a practical solution for keeping devices charged when you’re far from the grid. With its compact design, multiple charging options, and impressive efficiency, it stands out as a top choice for outdoor power needs.
Design and build
The FlexSolar 40W unfolds into a six-panel array measuring approximately 124 cm x 28 cm, yet folds down to a compact 28 cm x 20 cm x 4.5 cm, weighing just 1.3 kg. This makes it easy to slip into a backpack or stow in a vehicle. The panels are constructed with durable ETFE material, offering resistance to wear and tear, and boast an IP67 rating, ensuring protection against dust and water. However, it’s worth noting that while the panels are waterproof, the junction box lacks waterproofing and should be kept dry.
Setup and deployment
Setting up the FlexSolar 40W is straightforward. Simply unfold the panels and position them under direct sunlight. Integrated loops and included carabiners allow for easy attachment to tents, backpacks, or other structures. The absence of Velcro or clasps means fewer parts to manage, streamlining the deployment process.
Power output and charging options
Equipped with multiple output ports, the FlexSolar 40W offers versatility in charging:
- USB-A (QC3.0): Up to 18W for fast charging compatible devices.
- USB-C (PD 2.0): Up to 18W, suitable for modern smartphones and tablets.
- DC Output (19V): Up to 40W, ideal for charging portable power stations or laptops.
The panel utilizes smart IC chip technology to detect connected devices and deliver optimal charging currents, enhancing efficiency and safety.
Performance in the field
In real-world conditions, the FlexSolar 40W demonstrates commendable performance. Under direct sunlight, it delivers robust charging speeds, particularly through its DC output, which outperforms many competitors in its class. While USB charging speeds are average, the panel’s overall efficiency remains high. In overcast conditions, charging speeds naturally decrease but still provide sufficient power for essential devices.
When exposed to full sunlight and the panel heats up, I typically see real-world output around 30 to 32 watts, which is quite good for a panel of this size and class.
Portability in action
Weighing just 1.3 kg and folding down to a size comparable to a large book, the FlexSolar 40W is highly portable. Its slim profile and lightweight design make it a convenient companion for backpacking trips, camping excursions, or emergency kits. The inclusion of mounting loops and carabiners adds to its versatility, allowing for various setup configurations.
Pricing and value
Priced around $80–$105, the FlexSolar 40W offers excellent value for its features and performance. Its combination of durability, multiple charging options, and portability make it a worthwhile investment for those seeking reliable off-grid power solutions.
Additional features
- High Solar Conversion Efficiency: Up to 24% conversion rate, ensuring effective energy capture.
- Safety Protections: Built-in safeguards against overcurrent, overheating, and short circuits.
- Compatibility: Supports a wide range of devices, from smartphones and tablets to power stations and laptops.
Pros and cons
Pros:
- Compact and lightweight design.
- Multiple charging ports (USB-A, USB-C, DC).
- High solar conversion efficiency.
- Durable and weather-resistant construction.
Cons:
- Junction box is not waterproof.
- No integrated stand or kickstand for optimal sun positioning.
Conclusion
The FlexSolar 40W foldable solar panel stands out as a reliable and efficient power source for outdoor enthusiasts and emergency preparedness. Its blend of portability, multiple charging options, and robust construction make it a valuable addition to any off-grid setup. While it has minor drawbacks, such as the non-waterproof junction box, its overall performance and value make it a top contender in the portable solar panel market.
