#3 on this list
SolarPowa 20 TOPCon
BigBlue
The SolarPowa 20 TOPCon gives you two ports and 20 W rated for a group, at under 1.4 lb. **Highlights** - Two ports - Lighter than the SunJack 15W per maker - IP68 excluding junction box **Watch-outs** - No independent measurements - 5V output 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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- Specification researched
#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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- How we assessed it
- Specification researched
Specs side by side
| Spec | SolarPowa 20 TOPCon | 25W ETFE Foldable Solar Charger |
|---|---|---|
| Rated panel power | 20 W | 25 W |
| Ports | 1 x USB-C, 1 x USB-A (5V/3A each), 5V/4.2A total | 1 x USB-C, 1 x USB-A (5V/3A each) |
| Built-in battery | None | None |
| Weight | 0.6 kg (1.32 lb) per maker | 1.7 lb (0.77 kg) panel only, per maker |
| Water rating | IP68 excluding junction box per maker | — |
| Wild10 evidence | Research only, not field tested | Research only, not field tested |
| Best for | Group charging on a budget | Best cloudy-weather output |
| 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) |
What our reviewers liked and didn't
SolarPowa 20 TOPCon
- Two ports
- Lighter than the SunJack 15W per maker
- IP68 excluding junction box
- No independent measurements
- 5V output only
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
Prices change constantly — the figure shown is the last verified catalog price, and the buy buttons always go to the current listing.