Sunslice Fusion Flex 12W
(4 reviews)
A flexible 12W solar panel weighing just 240g, folding down to A4 size: the ultra-light way to recharge your phone while hiking or bikepacking.
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Characteristics
- Power: 12 W (CIGS cells, 16.5%)
- Weight: 240g, folds to A4 size
- Ports: 2x USB-A, 5V/2.4A
- Durability: Scratch and water resistant ETFE coating
- Ultra-light and flexible, unbreakable, pocket size
Detailed overview: Sunslice 12W flexible solar panel
The Sunslice Fusion Flex 12W is a portable solar panel built for travellers who count every gram: hikers, bikepackers, cycle tourers or anyone into lightweight bivouacking. Its promise is simple, real solar power without the weight or bulk of a classic panel.
Its technical edge lies in its CIGS (copper, indium, gallium, selenide) thin-film cells, a technology rarer than the usual monocrystalline silicon. It reaches 16.5% efficiency, among the best for this category of flexible panel, while allowing more flexibility and mechanical resilience than more brittle classic cells. The whole thing is protected by a scratch-resistant, water-resistant ETFE coating, making the panel virtually indestructible in normal use.
In terms of format, the Fusion Flex 12W unfolds into two panels to reach an active surface of 288 x 385 mm, then folds back down to A4 sheet size (288 x 190 mm), barely 2 mm thick. At 240g on the scale, it slips into a backpack pocket or bike bag without drawing attention. Four corner loops let you clip it straight onto a backpack or bikepacking bag while walking or riding, to charge on the move.
Output runs through two USB-A ports (5V/2.4A), with an LED indicator confirming there is charge coming in, handy for checking the panel's angle to the sun without pulling out your phone. In full sun, it can recharge a smartphone in roughly 1.5 to 2 hours, or two devices at once. Sunslice recommends using it to charge a power bank rather than a device directly, to smooth out power swings caused by passing clouds.
Its limits are those of any panel this size, no built-in battery to store energy, and output that depends heavily on sunlight and angle. But for anyone after the best power-to-weight ratio on the market in a genuinely flexible panel, the Fusion Flex 12W remains a solid reference, backed by a two-year warranty from Sunslice.
Full specifications
Detailed characteristics (EAN: 5430003494172)
Panel
| Peak power?Rated panel power in full sun (STC conditions). | 12 W |
|---|---|
| Cell technology?Cell type; monocrystalline offers the best efficiency, flexible CIGS tolerates shading better. | CIGS (thin film) |
| Conversion efficiency?Share of solar energy converted to electricity; higher means a more compact panel for the same power. | 16.5 % |
| Panel type?Foldable (portable), rigid framed (fixed install) or flexible (curved surfaces). | Flexible |
| Bifacial?Also captures reflected light on its rear side, for extra output. | No |
| Number of folds?Number of foldable segments. | 2 |
Outputs and connectors
| Output connectors?Output socket type(s) (MC4, XT60, Anderson, DC, USB…); determines compatibility with your station. | USB-A |
|---|---|
| USB-A outputs?USB-A ports to charge devices directly. | 2 × 12 W |
Durability and format
| Adjustable kickstand?Kickstand or support to angle the panel toward the sun. | No |
|---|---|
| Weight?Weight of the panel. | 0.24 kg |
| Unfolded dimensions (L × W × D)?Footprint when unfolded, in millimetres. | 288 × 385 × 1 mm |
| Folded dimensions (L × W × D)?Footprint when folded for transport, in millimetres. | 288 × 190 × 2 mm |
Warranty
| Warranty?Length of the manufacturer's warranty. | 2 years |
|---|
☀ How fast does this panel recharge a power station?
The Sunslice Fusion Flex 12W panel (12 W) recharges a Jackery Explorer 1000 v2 (1070 Wh) in ~127h or an EcoFlow Delta 2 Max (2048 Wh) in ~244h, in full sun.
| Compact / mid | Recharge |
|---|---|
| Jackery Explorer 100 Plus (99 Wh) | ~12h |
| EcoFlow River 2 (256 Wh) | ~30h |
| EcoFlow River 2 Max (512 Wh) | ~61h |
| EcoFlow River 2 Pro (768 Wh) | ~91h |
| High capacity | Recharge |
|---|---|
| Jackery Explorer 2000 v2 (2042 Wh) | ~243h |
| Anker Solix F2000 (2048 Wh) | ~244h |
| Jackery Explorer 3000 v2 (3072 Wh) | ~366h |
| Fossibot F3600 Pro (3840 Wh) | ~457h |
Estimate in full sun (ideal conditions). In practice, count on 3 to 5 hours of truly useful sunlight per day, so a full recharge may span several days depending on weather and orientation.
Comparison
How does the Sunslice Fusion Flex 12W compare with other lightweight nomad solar chargers?
| Criterion | Sunslice Fusion Flex 12W | BigBlue 28W | BioLite SolarPanel 10+ | Allpowers SP001 21W |
|---|---|---|---|---|
| Power | 12 W | 28 W | 10 W | 21 W |
| Cells | Flexible CIGS, 16.5% | Monocrystalline SunPower, ~24% | Monocrystalline | Monocrystalline, ~25% |
| Weight | 240g | ~680g | ~430g | ~610g |
| Built-in battery | No | No | Yes (3200 mAh) | No |
| Outputs | 2x USB-A | 2x USB-C + USB-A | 1x USB-A | USB + 12V |
The Fusion Flex 12W stands out for its featherweight build, roughly half the weight of its direct rivals, and for its genuine flexibility thanks to its CIGS cells, where the BigBlue 28W or the Allpowers SP001 trade extra power for a stiffer, heavier build, and the BioLite 10+ adds a built-in battery at the cost of lightness. For anyone who weighs every gram of their gear on trek or by bike, the Fusion Flex 12W remains the most compact choice in this comparison.
Related video
Video: Solar charger SUNSLICE Fusion FLEX 12 - Unbox & Test - Review 2021 - Published on 30/03/2021
Our tester's review: Julien De Jurquet
The Fusion Flex 12W quickly earned its place in my hiking pack. Clipped by its corner loops to the back of the bag, it keeps producing while I walk, and I find a full powerbank waiting in the evening without ever thinking about it during the day. The LED indicator is a smart touch, one glance tells you if the angle is right without pulling out your phone. Its flexibility is genuinely impressive too, folded and unfolded dozens of times, set down on rocks, stuffed into a compression sack, without a single mark. One honest downside, with 12W and no built-in battery, you really need direct sun to notice fast charging, output drops noticeably under a hazy sky. As a genuinely light backup charger for trekking or cycling, it is a safe bet.
Frequently asked questions: Sunslice 12W flexible solar panel
Yes, its two USB-A ports (5V/2.4A) let you plug a phone in directly under full sun. Sunslice still recommends charging a power bank first to smooth out the power dips caused by passing clouds.
CIGS (thin-film) cells are more flexible and more shock-resistant than a classic monocrystalline panel, reaching 16.5% efficiency here. They also hold up better to repeated folding without losing performance over time.
Its ETFE coating makes it water and scratch resistant, but it does not carry a certified IP rating. It can handle light rain, but should not be submerged.
Expect around 1.5 to 2 hours in full sun for a standard smartphone, versus 3 to 4 hours for a 10,000 mAh power bank. Actual time depends heavily on sunlight and the panel's angle.
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Published on 30/08/2026