The peak watt figure is a bench value, not a field promise · review
FlexSolar 15 W folding USB panel, 19.8 × 22.4 × 1.8 cm folded, 0.45 kg stated review
The lightest and smallest panel of the nine at 0.45 kg and 19.8 × 22.4 × 1.8 cm folded, and also the lowest peak figure here at 15 W — the trade is written on the label.
The bottom line The panel that publishes both of its carrying numbers and asks you to accept 15 W in exchange.
What this listing puts on record
A 15 W folding panel measuring 19.8 × 22.4 × 1.8 cm folded and weighing 0.45 kg, with three connectors under a rubber cover, a stated conversion of up to 24 %, an IP67 rating, a hiking buckle and two carabiners.
The smallest carry in this hub
Two figures, and both are published: 0.45 kg and a folded footprint of 19.8 × 22.4 cm. No other listing on this shelf goes lower on either. That is the whole argument of this panel, and it is the argument that can actually be checked against a pack lid before ordering — unlike a peak wattage.
Three sockets, one named
The listing counts three connectors, says they live under a rubber cover to keep dust and water out, and then names one: a USB output for 5 V Android and Apple devices. What the other two are is never said. Nor is any voltage other than 5 V, so nothing here suggests a Power Delivery profile.
The 15 W question
15 W is the lowest peak figure of the nine on this shelf, and it comes with no irradiance and no cell temperature, exactly like every other peak figure here. The maker adds that cloud or covering will slow the charge, and that an auto-restart resumes it. Read the 15 W as the ceiling of a small panel, and read the 0.45 kg as the reason it is small.
Availability
Selling between 34 € and 40 € across the German, French and Spanish Amazon stores when this page was checked.
It also sells on the American and British Amazon stores in the local currency, which the range above does not cover — that range counts euro stores and nothing else.
The Italian Amazon price sits more than 1.6× above the cheapest store. That gap usually means a reshipper rather than a local seller, so that listing is kept out of the range above.
Every figure in this section is what Keepa returned on the day this page was last updated. Prices and offers change without notice.
Prices quoted in this text were read on 6 September 2026. The live price is at the top of the page.
What it does well, and where it gives way
Strengths
0.45 kg is the lightest published weight of the nine, and 19.8 × 22.4 × 1.8 cm the smallest published folded footprint here
IP67 is stated, a rating shared on this shelf only with the VTOMAN panel
Both the folded size and the mass are published, which together decide whether a panel travels at all
Compromises
15 W is the lowest peak figure of the nine, and peak is a bench number to begin with
Three connectors are mentioned and only one of them is identified
No unfolded dimensions, so the area that has to face the sun is never given
Specifications
Stated peak output
15 W — stated in the title
Test conditions stated
Not published on the listing — no irradiance and no cell temperature accompany the 15 W
Cell type
Not published on the listing — the face is described as a PET polymer with a self-cleaning film, and the cells themselves are not named
Stated efficiency
Up to 24 % of solar energy converted — stated
Port set
Three connectors under a rubber cover — stated; the listing names a USB output for 5 V Android and Apple devices, and does not identify the other two
Power Delivery profiles
Not published on the listing — the only voltage quoted anywhere is 5 V
Controller included
Not published on the listing — the maker states the charger cannot store power and that the device is connected to the USB output
Folded dimensions
19.8 × 22.4 × 1.8 cm folded — stated
Unfolded dimensions
Not published on the listing
Weight
0.45 kg — stated
IP rating
IP67 — stated
Amazon reference
B09H6FWSZ6 (same reference on 6 Amazon marketplaces)
EAN
0785249519321
What people ask before buying
What are the three connectors?
The listing says three, says they sit under a rubber cover, and identifies one of them: a USB output for 5 V Android and Apple devices. The other two are never named. On a panel this size that matters, because the answer decides whether it can feed anything other than a phone.
Is 24 % comparable with the other figures here?
Only loosely. It is published as a bare percentage with no irradiance and no cell temperature behind it, which is true of every panel on this shelf. It also describes the conversion of solar energy rather than a rated output, so it belongs beside the 15 W and not instead of it.
SOLIX PS30 folding solar panel · 30 W stated · USB-A and USB-C · IP65 · two carabiners and an 18-month warranty · no size, mass or efficiency published
The emptiest specification of the nine: a 30 W folding panel with USB-A, USB-C and an IP65 rating, and no mass, no size, no cell type and no efficiency figure anywhere on the page.
Best for: A buyer choosing on the brand and the IP65, who does not need the panel compared with anything.
40 W folding solar module · XT60, USB-A and USB-C · 23 % efficiency stated · IPX4 · fold-out feet and a carry handle · XT60 and USB-C leads supplied · no size or mass published
A 40 W module sold first as an accessory to the maker's own battery power station, with an XT60 lead in the box, fold-out feet to aim it at the sun, and no dimension or mass published anywhere.
Best for: An owner of the maker's own battery power station, for whom the XT60 lead in the box settles the question.
30 W folding solar panel · USB-C, QC3.0 USB-A and 16.5 V DC · full voltage and current steps published · 21.5–23.5 % stated · 22.5 × 30.4 × 4.5 cm folded · 1.1 kg · carry bag
A 30 W panel built around a 16.5 V DC socket for a power station, and the only listing of the nine to print the voltage and current steps of every one of its outputs.
Best for: Someone pairing a panel with a power station and choosing on the DC socket rather than on the USB ones.
