Skip to main content
Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585
Q-Cells Brand review

Q.PEAK DUO RSF XL-G11S.3 / BFG 585

585 Wp PERC Bifacial 72%
ComparePV verdict

Warranty pick, heavy for its output

Rank 8,794 of 14,005
Compare panels Datasheet PDF
Power (Wp)
585
Typical for its class
Efficiency (%)
21.00
Weak · bottom 25%
Density (Wp/m²)
209.5
Weak · bottom 22%
Temp (%/°C)
-0.340
Typical · median -0.350
Weight (kg)
36.4
Weak · 5.6 kg above median
Warranty (yrs)
30
Strong · top 25%

The Q-Cells Q.PEAK DUO RSF XL-G11S series are bifacial modules featuring a glass-glass structure, specifically designed for large ground installations, particularly on trackers. The most significant practical difference is the robust steel frame (RSF) with advanced anti-corrosion coating - it increases resistance to field conditions and facilitates achieving a stable structure under demanding loads. The series also focuses on faster installation: special positioning solutions help installation teams efficiently align the modules and minimize risks during the mounting phase.

From the yield perspective, bifacial capability is key - the rear side of the module can genuinely contribute energy when the installation is on a light-colored ground surface or an asphalt surface with good reflectivity. Inside, Q.ANTUM monocrystalline cells operate, supported by PID and LeTID protection, as well as Hot-Spot Protect, making it easier to maintain performance over time. This is the choice for investors who prioritize LCOE, construction speed, and reliability, rather than just the specifications from the datasheet.

Ranking

589 panels in the segment PERC 550-600 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.00% 21.29% Weak · bottom 25% 9,758
Power density 209.5 212.9 Weak · bottom 22% 9,941
Temperature coefficient -0.340 -0.350 Typical 8,778
Weight per kWp 62.2 52.7 Weak · bottom 1% 12,754
Performance warranty 30 yrs 27 yrs Strong · top 25% 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

6 positive · 5 caution
Best for

Utility-scale and shaded-installations.

Not ideal for

Weight-limited structures, roofs where every square metre has to count and tight roof space.

Strengths
30 year performance warranty

Top 25% of the PERC 550-600 W segment, against a median of 27 yrs.

Watch-outs
62.2 kg per kWp

Bottom 1% of the PERC 550-600 W segment, against a median of 52.7. Ranked 12,754th in the whole database.

209.5 watts per square metre

Bottom 22% of the PERC 550-600 W segment, against a median of 212.9.

21.00% module efficiency

Bottom 25% of the PERC 550-600 W segment, against a median of 21.29%.

What owners get
Reinforced steel RSF frame

The RSF construction with advanced anti-corrosion coating withstands snow loads up to 5400 Pa and wind loads up to 3750 Pa, making it a dedicated solution for trackers and utility-scale ground-mount installations in demanding terrain.

Glass-glass bifacial design

The rear side adds measurable energy yield on bright or highly reflective ground surfaces, in practice pushing real-world output above datasheet values for monofacial modules on ground-mount installations.

30-year linear power warranty

Q-Cells offers a 30-year linear power warranty, placing this series in the premium segment alongside Talesun's BISTAR TP7F78M, while many tier-1 manufacturers still standardly offer only 25 years.

Faster installation via alignment system

Notch-tab alignment features allow a two-person crew to install a single module in about 20 seconds, meaningfully cutting construction time on large ground-mount projects.

PID, LeTID, and Hot-Spot Protect safeguards

Q.ANTUM cells with PID and LeTID degradation protection plus Hot-Spot Protect support stable performance retention over the panel's lifetime, which matters given the 30-year power warranty.

Trade-offs
Lower efficiency than comparable N-type panels

Efficiency of 21-21.5% (PERC) trails clearly behind comparable modules in this power class built on N-type cells, e.g. Powitt Solar M10 (23.23%) or Tongwei TWMND (23.2%), meaning a larger module area at the same 600 Wp rating and higher BoS cost per kWp.

Heavier steel RSF frame construction

The steel RSF frame, while boosting mechanical strength, is heavier than the aluminum frames typical of competing series, which can increase transport costs and mounting-structure requirements at scale.

Notes from the database
  • At 21.0% efficiency, this panel is on par with typical PERC 550-600W modules
  • At 209.5 W/m², this panel generates 3.4 W/m² less per unit area than PERC 550-600W median (212.9 W/m²)
  • At -0.34%/°C, hot weather performance is typical for PERC 550-600W panels
  • At 36.4 kg, this panel is 5.6 kg heavier than the PERC 550-600W median (30.8 kg) - more demanding for installation crews
  • 72% bifaciality enables rear-side power generation, boosting yield by 4-11% on reflective surfaces

Specifications

Open datasheet PDF
Nominal power (Pmax) 585 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.00 % Weak Segment median 21.29%
Vmpp · Impp 44.75 V · 13.07 A Operating point at max power
Voc · Isc 53.57 V · 13.72 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2462×1134×35 mm · 2.79 m² of roof
Weight 36.4 kg Weak Weak · 5.6 kg above median
Cells 156 · PERC Monocrystalline
Bifaciality 72 % Rear output as a share of front
Coefficient Pmax -0.340 %/°C Typical median -0.350 of its segment
Coefficient Voc · Isc -0.270 · 0.040 %/°C
NOCT 42 °C At 800 W/m², 20 °C ambient
Performance warranty 30 years Strong top 25% · median 27 yrs
End-of-warranty output 85.0 % Equals 497 W guaranteed
Degradation 2.00 → 0.45 % First year, then annual

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.340 %/°C against a segment median of -0.350
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585 585 W 21.00% -0.340 36.4 kg You are here
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +3.8 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +3.6 pp
AIKO-A635-MAE72Mw 635 W 24.60% -0.260 27.0 kg Cooler, lighter, +3.6 pp
AIKO-A630-MAH72Dw 630 W 24.40% -0.260 32.5 kg +45 W, cooler, +3.4 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, 20 kg lighter, +3.4 pp
Q.PEAK DUO XL-G11S.3 / BFG 580 580 W 20.80% -0.340 34.9 kg Lighter
Q.PEAK DUO RSF XL-G11S.3 / BFG 590 590 W 21.10% -0.340 36.4 kg Very close match
Q.PEAK DUO RSF XL-G11S.3 / BFG 595 595 W 21.30% -0.340 36.4 kg +10 W, +0.3 pp
Q.PEAK DUO RSF XL-G11S.3 / BFG 600 600 W 21.50% -0.340 36.4 kg +15 W, +0.5 pp
Q.PEAK DUO XL-G11S.3 / BFG 605 605 W 21.70% -0.340 34.9 kg +20 W, lighter, +0.7 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +95 W, cooler, +4.2 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +90 W, cooler, +4.0 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +115 W, cooler, +4.0 pp
AIKO-A695-MAE78Dw 695 W 24.90% -0.260 34.5 kg +110 W, cooler, +3.9 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +85 W, lighter, +3.8 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +85 W, cooler, +3.8 pp

Found 616 panels of the same or similar size to this one, within ±10 mm. See them here Found 616 panels of the same or similar size to this one, within ±25 mm. See them here Found 616 panels of the same or similar size to this one, within ±50 mm. See them here Found 1813 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
Why does the Q.PEAK DUO RSF XL-G11S use a steel frame instead of aluminum?
The RSF (Reinforced Steel Frame) with an advanced anti-corrosion coating provides significantly higher mechanical rigidity than standard aluminum frames. This is critical for utility-scale single-axis tracker deployments, where modules undergo continuous rotational movement and higher dynamic loads. The frame is certified for snow loads up to 5,400 Pa and wind loads up to 3,750 Pa, enabling more demanding mounting configurations without voiding the warranty.
How much extra energy does the bifacial design of the Q.PEAK DUO RSF XL-G11S actually deliver?
The glass-glass rear side actively generates power from light reflected off the ground surface. Under favorable conditions — bright gravel, concrete, or snow-covered ground with high albedo — bifacial gain can reach up to 20% additional energy yield compared to a monofacial module with the same front-side power rating. Actual gain depends on ground albedo, module elevation above the ground, and array tilt angle.
What is the power warranty for the Q.PEAK DUO RSF XL-G11S series?
Q-Cells guarantees at least 98% of nominal power in year one, followed by a maximum annual degradation rate of 0.45%. After 10 years the module retains at least 93.95% of rated power; after 30 years, at least 84.95%. The product warranty covering manufacturing defects runs for 12 years. This is among the most competitive linear power warranties available for bifacial PERC modules on the market.
Is the Q.PEAK DUO RSF XL-G11S series specifically designed for single-axis trackers?
Yes, the RSF XL-G11S series was engineered specifically for single-axis tracker applications. The higher-rigidity steel frame minimizes deflection during rotation, and the built-in notch-tab alignment system enables fast, precise module positioning by a two-person installation crew. The elevated wind and snow load ratings keep the installation within certification limits even at demanding sites and in high-wind regions.
How fast can Q.PEAK DUO RSF XL-G11S modules be installed in the field?
Q-Cells integrated a notch-tab positioning system directly into the RSF frame, allowing a two-person team to install a single module in approximately 20 seconds. The alignment features eliminate manual row-by-row adjustment and reduce the risk of mounting errors. For large-scale ground-mount farms, this translates into meaningfully shorter construction schedules and lower overall labor costs per installed watt.
What power output, efficiency, and cell technology do the Q.PEAK DUO RSF XL-G11S panels use?
The series covers a front-side power range of 585 to 600 Wp with module efficiency of at least 21.3%. The cells use Q.ANTUM half-cut PERC technology, featuring a low temperature coefficient of minus 0.34% per degree Celsius. Built-in protection against PID, LeTID, and hot-spot effects helps maintain stable energy yields throughout the full 30-year linear power warranty period.
Add to compare