A fixed panel is chosen by its voltage as much as by its watts · review
SUNNIVA 460 W bifacial glass-glass N-type, full black review
A 460 W bifacial glass-glass module using N-type TOPCon cells in a full black finish, rated IP68, whose listing claims up to 30 % extra yield from the rear face.
The bottom line A handsome, well-sealed bifacial module sold on aesthetics and on a bifacial gain that depends entirely on what sits behind it. It publishes no voltage, no dimension and no warranty, which makes it a module you cannot design a string around.
A 460 W full black glass-glass module, sold on appearance and on the rear face.
What bifacial actually buys
The second bullet describes the mechanism honestly: light reflected from the surroundings reaches the rear. The gain quoted — up to 30 % — carries a footnote marker whose conditions never appear, and the gain depends entirely on the surface behind the panel. On a bright flat roof it is real; against a dark balcony wall it is close to nothing.
The construction
Two layers of tempered glass, N-type TOPCon cells, a black frame, and IP68. That last figure is published as a code, which is more than most modules here manage.
The gaps that matter
No open-circuit voltage. No maximum power voltage. No current. Those are the numbers an inverter’s input window is checked against, and without them the module cannot be placed in a string on paper.
No dimensions either, on a product that has to fit a railing or a mounting rail.
The temperature coefficient
The first bullet describes it as excellent, twice. The figure itself appears nowhere. It is the one specification that predicts behaviour on a hot roof, and it is praised rather than published.
Availability
German Amazon store quoted about 109 € when this page was compiled.
French, Italian and Spanish Amazon catalogues carry an entry for it, with nobody selling.
American and British Amazon stores returned nothing at all, so the buy button there runs a search instead of landing on an empty page.
These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.
Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.
What it gets right, and what it leaves out
Strengths
IP68 is published as a code, the highest in this family
Bifacial glass-glass construction is described with the mechanism, not just the name
Compatibility with common micro-inverters and mounting systems is stated
Compromises
No voltages at all — the figures that decide whether it can be strung to a given inverter
The temperature coefficient is praised and never given
No dimensions, no weight and no warranty terms
Specifications
Peak wattage
460 W, stated as PMax in the title
Cell technology
N-type TOPCon, first bullet, described as performing in low light and at dusk
Voltages
Nowhere in the listing — no open-circuit or maximum power voltage is published
Temperature coefficient
Named as excellent in the first bullet; NO figure is published
Frame
Black frame with dark cells and unobtrusive busbars, third bullet
Glass
Two layers of tempered safety glass, fourth bullet; bifacial construction described in the second
Dimensions
Nowhere in the listing
Warranty terms
Nowhere in the listing — no product or performance warranty is stated
Amazon reference
B0FH2CMYNG (same reference on 4 Amazon marketplaces)
EAN
4255656236570
Questions owners ask about this one
What does “up to 30 % extra yield” from bifacial depend on?
On what is behind the module. A light roof, sand or snow reflects a great deal; a dark balcony wall reflects very little. The listing marks the figure with a footnote whose conditions do not appear, so it describes a best case rather than a typical one.
Can I plan a string without the voltages?
No. An inverter has a minimum starting voltage and a maximum it must never see, and open-circuit voltage rises as cells get colder. Without the module’s voltages, that calculation cannot be done at all — which is the largest gap on this sheet.
2 × 200 W peak · N-type 18-busbar cells, 25 % stated · voltages not published · temperature coefficient not published · frameless flexible · ETFE with 95 % transmission · dimensions not published · bypass diodes fitted
A pair of 200 W flexible ETFE panels with 18-busbar N-type cells and integrated bypass diodes, fitted with six stainless eyelets and six straps each.
Best for: A van roof or a curved cabin top where a framed module cannot sit flat.
2 × 450 W peak · N-type half-cell 16BB SMBB · voltages not published · temperature coefficient not published · reinforced aluminium frame · 1.6 + 1.6 mm tempered double glass · 5400 Pa front, 2400 Pa rear · German fire class A · 30-year warranty · EL tested
A pair of 450 W bifacial N-type modules with 16 busbars and half cells, published with front and rear mechanical loads, a German fire class and a thirty-year warranty.
Best for: A snowy or windy site where the mechanical load figures are the deciding specification.
460 W peak with a 0–5 W positive tolerance · N-TOPCon · voltages not published · optimised coefficient, figure not given · 1762 × 1134 × 30 mm · glass-glass · 0.40 % annual degradation, 87.4 % after 30 years · 25-year product and 30-year linear performance warranty
A 460 W bifacial N-TOPCon module published with dimensions, an annual degradation rate, a thirty-year performance warranty and certification to IEC 61215, IEC 61730 and IEC 61701.
Best for: A balcony or roof installation where the module will still be there in twenty years and the warranty terms are part of the purchase.
