Reader rating
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The SunJack 15W gave the best measured output for its weight in the independent data we found, and it has both USB-C and USB-A. **Highlights** - Strong measured USB-C output - USB-C and USB-A - IP67 USB ports per maker - In stock at SunJack when checked **Watch-outs** - No built-in battery - 1.4 lb panel only per maker 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.
Pros
- Strong measured USB-C output
- USB-C and USB-A
- IP67 USB ports per maker
- In stock at SunJack when checked
Cons
- No built-in battery
- 1.4 lb panel only per maker
Best uses
- Thru-hiking
- Week-long trips
- Sunny western routes
Specifications
- Rated panel power
- 15 W
- Ports
- 1 x USB-C, 1 x USB-A (5V/3A each), 15 W max combined
- Built-in battery
- None
- Weight
- 1.4 lb (0.64 kg) panel only, per maker
- Folded
- 7.8 x 8.82 x 1 in
- Measured output
- 10.1 W USB-C sun, 4.8 W USB-C cloud (Outdoor Life)
- Wild10 evidence
- Research only, not field tested
- Best for
- Best balance for backpacking
Pricing
We don't publish a price we haven't verified. The retailer links below open the live listing for this exact model.
Best for
Thru-hiking, Week-long trips, Sunny western routes
Where to buy the 15W ETFE Foldable Solar Charger
Prices and stock change often, so check the current Amazon offer before you buy.
Some links are affiliate links. Buying through them supports our testing at no extra cost to you.
The SunJack 15W gave the best measured output for its weight in the independent data we found, and it has both USB-C and USB-A.
Why it ranks here
Outdoor Life measured 10.1 W from USB-C in sun and 4.8 W under clouds. Those are short readings, not daily yield. A 15 W rated panel delivering about 10 W in sun is a good result, and the panel weighs 1.4 lb per SunJack.
Specs that matter on trail
Rated panel power: 15 W; Ports: 1 x USB-C, 1 x USB-A (5V/3A each), 15 W max combined; Built-in battery: None; Weight: 1.4 lb (0.64 kg) panel only, per maker; Folded: 7.8 x 8.82 x 1 in; Measured output: 10.1 W USB-C sun, 4.8 W USB-C cloud (Outdoor Life). All figures are maker-stated unless a review outlet is named.
Limits and caveats
Measured watts are short readings under the reviewer's conditions. Daily energy depends on hours of usable sun, angle and heat. It has no battery, so pair it with a power bank. Outdoor Life lists 1 lb 5 oz, slightly lighter than the maker figure.
How we picked
We started with a long list of backcountry solar chargers that people actually buy, cut anything that could not clear our baseline for durability and field performance, then ranked the 10 that were left against the same criteria. Rankings are editorial. No brand pays for placement, and affiliate links never move a pick up or down.
- Real-world output
- Usable charging in clouds or cold, not just the rated wattage or capacity.
- Ports and packability
- Port types, charging speed and weight for the power delivered.
- Real-world durability
- How the material, stitching, or steel holds up after a season of hard use — not how it looks new.
- Performance in bad conditions
- Wind, rain, cold, and grit are the test. Anything that only works on a nice day gets marked down.
- Weight and packability
- Every ounce has to earn its place in the pack, but not at the cost of something that fails in the field.
- Ease of use
- Setup, adjustment, and maintenance with cold hands, in the dark, without the manual.
15W ETFE Foldable Solar Charger — frequently asked questions
- Is the 15W ETFE Foldable Solar Charger worth it?
- We rank it #1 in Backcountry Solar Chargers. The SunJack 15W gave the best measured output for its weight in the independent data we found, and it has both USB-C and USB-A. 4 lb panel only per maker Research only: Wild10 has not field tested this model.
- What is the 15W ETFE Foldable Solar Charger best for?
- Best for thru-hiking, week-long trips and sunny western routes. Standouts: strong measured usb-c output and usb-c and usb-a.
- What are the downsides of the 15W ETFE Foldable Solar Charger?
- No built-in battery and 1.4 lb panel only per maker.
- What are the key specs of the 15W ETFE Foldable Solar Charger?
- Rated panel power: 15 W · Ports: 1 x USB-C, 1 x USB-A (5V/3A each), 15 W max combined · Built-in battery: None · Weight: 1.4 lb (0.64 kg) panel only, per maker · Folded: 7.8 x 8.82 x 1 in
- Why it ranks here?
- 8 W under clouds. Those are short readings, not daily yield.
- Specs that matter on trail — what should I know about the 15W ETFE Foldable Solar Charger?
- 8 W USB-C cloud (Outdoor Life). All figures are maker-stated unless a review outlet is named.
Compare side by side
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