The peak watt figure is a bench value, not a field promise · review
Xolunex 20 W folding panel, two QC-compatible USB outputs, IP54, about 0.85 kg stated review
A 20 W monocrystalline panel whose listing opens by promising an openly communicated cell area, and then publishes neither that area, nor an efficiency percentage, nor a single dimension.
The bottom line A listing that makes openness its opening argument and leaves the number it names blank.
What this listing puts on record
A 20 W folding panel with monocrystalline cells, two QC-compatible USB outputs, an IP54 rating, a 900D outer fabric, a stated mass of about 0.85 kg, and a supplied charging cable with one input and three tips — USB-C, Lightning and Micro-USB.
A claim of openness with no number attached
The listing opens on transparency: real 20 W output, monocrystalline cells, and — its own words — an openly communicated cell area. The area never arrives. Not in that bullet point, not in the four that follow, not in the title. Nor does a conversion percentage, which is how the rest of this shelf answers the same question. The promise is unusual and worth noting; so is the blank where it should have landed.
The 100 W belongs to the cable
Two lines below the 20 W sits a figure of up to 100 W. It describes the supplied three-output cable, and the maker qualifies it as device- and source-dependent. A cable rating and a panel rating are different measurements of different objects, and on this page they are close enough together to be read as one. They are not.
What 900D and IP54 cover
IP54 and a 900D fabric are stated together, against splashing water and dust. That is a middling ingress figure on this shelf — two panels here publish IP67 — and the fabric denier is a detail few of the others give at all. Add about 0.85 kg, and the physical side of this listing is better answered than the electrical one, apart from the dimensions, which are missing entirely.
Availability
Selling at about 65 € on the German Amazon store when this page was checked.
Catalogued on the American, British, French, Italian and Spanish Amazon stores with nobody selling it: the reference is there, the offer is not.
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
Names monocrystalline cells, an IP54 rating and a 900D fabric — three material facts where several listings here manage one
A multi-output charging cable is supplied: USB-C, Lightning and Micro-USB from a single input
About 0.85 kg is published, and only two panels here are lighter
Compromises
The listing advertises an openly communicated cell area and never gives it
No efficiency percentage, and no folded or unfolded dimensions
The 100 W in the bullet points belongs to the supplied cable, not to the panel, and the two sit two lines apart
Specifications
Stated peak output
20 W — stated in the title, and described by the maker as a real 20 W
Test conditions stated
Not published on the listing — no irradiance and no cell temperature accompany the 20 W
Cell type
Monocrystalline — stated
Stated efficiency
Not published on the listing — the first bullet point promises an openly communicated cell area, and neither an area nor a percentage appears anywhere on the page
Port set
Two USB outputs, described as QC-compatible — stated; the supplied cable takes one input, USB-C or USB-A through an adapter, and offers three outputs, USB-C, Lightning and Micro-USB
Power Delivery profiles
Not published on the listing — a figure of up to 100 W is quoted for the supplied cable, described as device- and source-dependent, and no Power Delivery profile is named for the panel
Controller included
Not published on the listing — no charge controller or regulator is named
Folded dimensions
Not published on the listing
Unfolded dimensions
Not published on the listing
Weight
About 0.85 kg — stated
IP rating
IP54 — stated, alongside a 900D fabric
Amazon reference
B0GMYG4Y3D (same reference on 6 Amazon marketplaces)
EAN
4262544410059
What people ask before buying
Does this panel put out 100 W?
No — and the listing does not claim it does, though the two figures sit close together. The 100 W describes what the supplied three-output cable can pass, device- and source-dependent, in the maker's own words. The panel is 20 W. The bullet point about the cable is about the cable.
Where is the cell area?
That is the open question on this page. The first bullet point names an openly communicated cell area as one of the three things that make the panel transparent, and no square-centimetre figure follows — not there, and not in the four bullet points after it. Nor does a conversion percentage, which is the usual stand-in.
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.
15 W folding solar panel · three rubber-covered connectors · up to 24 % conversion stated · IP67 · 19.8 × 22.4 × 1.8 cm folded · 0.45 kg — the lightest published weight of the nine
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.
Best for: A day pack where the panel has to disappear between uses and a phone is the only thing being charged.
