#4 on this list
25W ETFE Foldable Solar Charger
SunJack
The SunJack 25W kept the most output under clouds in Outdoor Life's testing and the most indirect-light charge in OutdoorGearLab's. **Highlights** - Best cloud result in independent tests - USB-C and USB-A - In stock at SunJack when checked **Watch-outs** - Heavier than the 15W - Small sunny gain over the 15W Research only: Wild10 has not field tested this model. Specifications come from the maker page; any measured figure is credited to the outlet that measured it.
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#5 on this list
E20PRO 20W
FlexSolar
The E20PRO is a light dual-port 20 W panel for hikers who want USB-C without the SunJack's weight. **Highlights** - 396 g per maker - USB-C and USB-A - Orderable when checked **Watch-outs** - No independent measurements - 5V only Research only: Wild10 has not field tested this model. Specifications come from the maker page; any measured figure is credited to the outlet that measured it.
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Specs side by side
| Spec | 25W ETFE Foldable Solar Charger | E20PRO 20W |
|---|---|---|
| Rated panel power | 25 W | 20 W |
| Ports | 1 x USB-C, 1 x USB-A (5V/3A each) | 1 x USB-C, 1 x USB-A (5V) |
| Built-in battery | None | None |
| Weight | 1.7 lb (0.77 kg) panel only, per maker | 396 g per maker |
| Measured output | 10.7 W USB-C sun, 6.6 W USB-C cloud (Outdoor Life) | — |
| Measured 1 hour | 1,918 mAh direct, 675 mAh indirect (OutdoorGearLab) | — |
| Wild10 evidence | Research only, not field tested | Research only, not field tested |
| Best for | Best cloudy-weather output | Light dual-port panel |
| Folded | — | 220 x 217 mm |
What our reviewers liked and didn't
25W ETFE Foldable Solar Charger
- Best cloud result in independent tests
- USB-C and USB-A
- In stock at SunJack when checked
- Heavier than the 15W
- Small sunny gain over the 15W
E20PRO 20W
- 396 g per maker
- USB-C and USB-A
- Orderable when checked
- No independent measurements
- 5V only
Prices change constantly — the figure shown is the last verified catalog price, and the buy buttons always go to the current listing.