Hanwha Q CELLS Q.PEAK DUO ML-G11S 505W

Hanwha Q CELLS is a Korean-German manufacturer with strong UK installer presence. The Q.PEAK DUO ML-G11S is their current G11 series mid-power residential/light-commercial module — 505W at 21.5% efficiency, in a 2118×1052mm 78-cell format.

The Q.ANTUM cell architecture is Q CELLS' refined Mono PERC platform with anti-LID (light-induced degradation) treatment. While not N-Type, it benefits from long real-world track record — Q CELLS has shipped tens of GW of Q.ANTUM globally — and a 25-year product warranty matched by few other Mono PERC brands.

Who it suits

Larger residential or small-commercial installs where you want a well-known, well-supported brand and the higher absolute wattage of a 78-cell format. Q CELLS' 25-year product warranty is class-leading for Mono PERC.

What I'd watch for

This is a big-format module (2.1m × 1m) — confirm it fits between your roof obstacles before specifying. At 21.5% efficiency, it trails current N-Type panels: you trade some watts-per-area for the bullet-proof warranty and brand stability. Silver-frame aesthetic suits roofs with light tiles; for dark/black-tile roofs the visual contrast is more pronounced.