Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 vs Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585
VS
The verdict
600 leads on the differences that matter
The largest is module efficiency: 0.50 pp more efficient. 15 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 3 differencesHow alike are they
15
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
3 of 18 parameters
What actually differs
Parameter
600
585
Difference
Module efficiency
21.50 %
21.00 %
0.50 pp more efficient
Power density
214.9 Wp/m²
209.5 Wp/m²
5.4 Wp/m² higher
Rated power
600 Wp
585 Wp
15 W more power
02
What it means on a roof
Thirty years of production
Each panel's own declared degradation curve, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
600
19,759 kWh
585
19,265 kWh
Lifetime gap
494 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
600
585
Standard test conditions
25 °C
100.0% of rated power
600 W
585 W
Cool, bright day
40 °C
94.9% of rated power
569 W
555 W
Typical summer roof
55 °C
89.8% of rated power
539 W
525 W
Hot roof
70 °C
84.7% of rated power
508 W
495 W
03
Full specification
Parameter
600
585
Difference
Power and efficiency
Rated power
600 Wp
585 Wp
+15 W for 600
Module efficiency
21.50 %
21.00 %
+0.50 pp for 600
Power density
214.9 Wp/m²
209.5 Wp/m²
+5.4 Wp/m² for 600
Open-circuit voltage
53.66 V
53.57 V
Effectively the same
Voltage at max power
45.39 V
44.75 V
Effectively the same
Short-circuit current
13.80 A
13.72 A
Effectively the same
Current at max power
13.22 A
13.07 A
Effectively the same
Temperature
Temperature coefficient
-0.340 %/°C
-0.340 %/°C
Same
Mechanical
Dimensions
2462x1134x35 mm
2462x1134x35 mm
Same
Module area
2.792 m²
2.792 m²
Same
Weight
36.4 kg
36.4 kg
Same
Weight per kWp
60.7 kg/kWp
62.2 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
-
-
Neither datasheet publishes this
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.45 %/yr
0.45 %/yr
Same
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
156
156
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#7,958
vs
#9,758
600 leads by 1,800 places
Power density
#8,031
vs
#9,941
600 leads by 1,910 places
Heat behaviour
#8,778
vs
#8,778
Tied - the same position in the database
Weight
#12,510
vs
#12,754
600 leads by 244 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#7,604
vs
#8,794
600 leads by 1,190 places
05
Open the full database
More useful comparisons
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06
Written summary
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07
Questions about this pairing
Which panel is better: Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 or Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585?
According to our database: Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 has higher module efficiency (21.50% vs 21.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 and Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585?
Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 has a module efficiency of 21.50%, while Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585 is 21.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 use vs Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585?
Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 uses PERC cells; Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585 uses PERC. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.
What is the warranty on Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 and Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585?
Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 has a 30 years power warranty; Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585 has a 30 years power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80-87%). Product (materials) warranties are usually shorter.
Are Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 and Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585 bifacial panels?
Both Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 600 and Q-Cells Q.PEAK DUO RSF XL-G11S.3 / BFG 585 are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.
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Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate. The thirty-year projection and the temperature scenarios are calculations from those figures, and each states its assumption above.