Best for Leisure Batteries · 1 of 2
DOKIO Foldable Solar Panel 100 Watt Monocrystalline Solar Suitcase Portable with Controller to Charge 12V Batt

- 100W, smart PWM controller
- 9.8 ft cable, USB 5V 2A
- Clip-on 12V battery charging
Our take
A plug-and-play 100W panel for a leisure battery.
Why it made the shortlist
The DOKIO 100W suitcase clips straight onto a 12V battery with alligator leads and a smart PWM controller. The listing gives a 9.8 foot lead, two 5V 2A USB outlets and a transferable 25 year output guarantee, and names vented, AGM and gel batteries.
It needs no extra gear to charge a leisure battery, and the long cable lets the panel stand in sun while the battery sits in shade. Compared with the GRECELL, it costs far less and has half the watts.
It suits caravaners who want to top up a leisure battery on a campsite with no mains. The USB ports charge phones from the panel.
What works
- Clips straight onto the 12V battery
- Long cable keeps the battery in shade
- USB ports charge phones
- 25-year output warranty listed
Watch out for
- Clip polarity must be checked
- PWM controller is less efficient than MPPT
- The catch
- Clip polarity matters, so match red to positive carefully.



