Cheapest Entry · 1 of 6
Holdwell S 30W Portable Solar Panel, Foldable ETFE, USB-C and QC3.0, IP65

- 30W, 1.5 lb, IP65 ETFE
- USB-C 30W plus two USB-A
- Folds to 9.4 x 7.5 inches
Our take
Weekend walkers and kayakers wanting the least spend for real solar phone charging will find it a clean fit.
Why it made the shortlist
Holdwell uses grid-free HPBC monocrystalline cells at a stated 24 percent efficiency, laminated under a four-fold ETFE face. Among these picks it is the entry pick here on price, and it weighs 1.5 pounds.
Opened it spans about 31 inches, and it folds down to 9.4 by 7.5 inches.
Three outputs cover a phone, a tablet and a headlamp at once: a 30 watt USB-C port at 12 volts and 2.5 amps, a QC3.0 USB-A and a standard USB-A. The listing says no charge controller is needed for direct USB use.
Four carabiners and a cable ship in the box.
An IP65 seal and a scratch-resistant surface let it ride on the outside of a pack through a trail day.
What works
- Pocket-weight at 1.5 pounds
- Direct USB, no controller needed
- Carabiners included for pack mounting
- Efficient HPBC cells with ETFE face
Watch out for
- Thirty watts is slow for tablets
- No MC4 output for stations






