FlexSolar 40W Foldable Solar Charger Review
A compact, multi-output portable solar panel designed for off-grid charging of small electronics like smartphones and power banks.
Quick verdict
The FlexSolar 40W is a solid entry-level choice for hikers and campers looking to keep phones topped up without a mains connection. While it won't power your home or high-drain appliances, it provides a reliable, low-cost way to reduce reliance on grid-charged power banks during outdoor travel.
PowerGuardian Rating
Who it's best for
- Hikers and wild campers
- Emergency 'grab-bag' kits
- Users wanting to charge phones off-grid
Who should avoid it
- You need to charge high-capacity power stations quickly
- You are looking for a permanent home energy solution
- You require consistent, fast charging regardless of weather
Overview
Key features
- 40W peak power output
- Triple output: USB-C (PD2.0), USB-A (QC3.0), and DC ports
- IP67 waterproof and weather-resistant ETFE coating
- Foldable, lightweight design for portability
- Equipped with rings for hanging on backpacks or tents
Real world performance
Energy saving potential
Installation
Running costs
Pros
- Versatile range of output ports for modern gadgets
- Excellent durability and waterproofing for UK conditions
- Very easy to transport and set up
- ETFE coating offers better longevity than standard PET panels
Cons
- Peak wattage is rarely achieved in UK cloud cover
- Not powerful enough for laptops or high-wattage appliances
- Charging speed fluctuates heavily with passing clouds
Alternatives
FlexSolar 60W Foldable Solar Charger
A more powerful version for slightly larger power stations and faster phone charging.
FlexSolar 36W Ultra-Portable Panel
A lighter, more compact option for minimalists who prioritse weight over output.
Frequently asked questions
Will this charge my phone in the rain?
While the panel is IP67 waterproof, charging efficiency drops significantly in overcast or rainy conditions. It is best to wait for clear skies or keep the connected device protected from moisture.
Can I use this to charge a laptop?
Generally no. Most laptops require much higher wattage and 19V-20V input, whereas this 40W panel is designed for 12V DC or 5V-9V USB devices.
Does this panel store power?
No, it has no internal battery. It only provides power when exposed to sunlight. You should pair it with a power bank to store energy for later use.
How do I get the most power from it in the UK?
For optimal results, face the panel due south at a 30-45 degree angle and ensure there is no shadow from trees or bushes across any part of the panel.
Final verdict
3.9 / 5The FlexSolar 40W is a solid entry-level choice for hikers and campers looking to keep phones topped up without a mains connection. While it won't power your home or high-drain appliances, it provides a reliable, low-cost way to reduce reliance on grid-charged power banks during outdoor travel.