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TRON S-G3R.12+ / BFG 440 vs PEAK DUO ML-G12S.3 / BFG 665 3 of 18 identical Swap Change panels

Q-Cells Q.TRON S-G3R.12+ / BFG 440 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665

Q.TRON S-G3R.12+ / BFG 440
440 Wp 22.00 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Q.PEAK DUO ML-G12S.3 / BFG 665
665 Wp 21.40 % Bifacial
Open panel page Datasheet PDF
The verdict

TRON S-G3R.12+ / BFG 440 leads on the differences that matter

The largest is temperature coefficient: 0.040 %/°C better in heat. 3 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 15 differences
How alike are they
3 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

15 of 18 parameters
Parameter TRON S-G3R.12+ / BFG 440 PEAK DUO ML-G12S.3 / BFG 665 Difference
Temperature coefficient -0.300 %/°C -0.340 %/°C 0.040 %/°C better in heat
Rated power 440 Wp 665 Wp 225 W more power
Module efficiency 22.00 % 21.40 % 0.60 pp more efficient
Weight 20.9 kg 38.2 kg 17.3 kg lighter
Weight per kWp 47.5 kg/kWp 57.4 kg/kWp 9.9 kg/kWp lighter
Product warranty 25 yrs 12 yrs 13 yrs longer
Annual degradation 0.33 %/yr 0.45 %/yr 0.12 %/yr slower
Power density 220.2 Wp/m² 214.1 Wp/m² 6.1 Wp/m² higher
Open-circuit voltage 34.67 V 45.70 V 11.03 V apart
Short-circuit current 15.95 A 18.39 A 2.44 A apart
Module area 1.998 m² 3.106 m² 1.108 m² apart
Voltage at max power 29.72 V 38.11 V 8.39 V apart
Current at max power 14.81 A 17.45 A 2.64 A apart
Cell count 96 132 36 cells apart
Dimensions 1762x1134x30 mm 2384x1303x35 mm 1762x1134x30 mm vs 2384x1303x35 mm
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
TRON S-G3R.12+ / BFG 440
14,844 kWh
PEAK DUO ML-G12S.3 / BFG 665
21,899 kWh
Lifetime gap
7,055 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario TRON S-G3R.12+ / BFG 440 PEAK DUO ML-G12S.3 / BFG 665
Standard test conditions 25 °C 100.0% of rated power 440 W 665 W
Cool, bright day 40 °C 94.9% of rated power 420 W 631 W
Typical summer roof 55 °C 89.8% of rated power 400 W 597 W
Hot roof 70 °C 84.7% of rated power 381 W 563 W
03

Full specification

Parameter TRON S-G3R.12+ / BFG 440 PEAK DUO ML-G12S.3 / BFG 665 Difference
Power and efficiency
Rated power 440 Wp 665 Wp +225 W for PEAK DUO ML-G12S.3 / BFG 665
Module efficiency 22.00 % 21.40 % +0.60 pp for TRON S-G3R.12+ / BFG 440
Power density 220.2 Wp/m² 214.1 Wp/m² +6.1 Wp/m² for TRON S-G3R.12+ / BFG 440
Open-circuit voltage 34.67 V 45.70 V 11.03 V apart
Voltage at max power 29.72 V 38.11 V 8.39 V apart
Short-circuit current 15.95 A 18.39 A 2.44 A apart
Current at max power 14.81 A 17.45 A 2.64 A apart
Temperature
Temperature coefficient -0.300 %/°C -0.340 %/°C +0.040 %/°C for TRON S-G3R.12+ / BFG 440
Mechanical
Dimensions 1762x1134x30 mm 2384x1303x35 mm 1762x1134x30 mm vs 2384x1303x35 mm
Module area 1.998 m² 3.106 m² 1.108 m² apart
Weight 20.9 kg 38.2 kg -17.3 kg for TRON S-G3R.12+ / BFG 440
Weight per kWp 47.5 kg/kWp 57.4 kg/kWp -9.9 kg/kWp for TRON S-G3R.12+ / BFG 440
Warranty and degradation
Product warranty 25 yrs 12 yrs +13 yrs for TRON S-G3R.12+ / BFG 440
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.33 %/yr 0.45 %/yr -0.12 %/yr for TRON S-G3R.12+ / BFG 440
Technology
Cell technology TOPCon - Not published by Q-Cells
Cell type Monocrystalline Monocrystalline Same
Cell count 96 132 36 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#6,580 vs #8,388
TRON S-G3R.12+ / BFG 440 leads by 1,808 places
Power density
#6,391 vs #8,315
TRON S-G3R.12+ / BFG 440 leads by 1,924 places
Heat behaviour
#6,152 vs #8,846
TRON S-G3R.12+ / BFG 440 leads by 2,694 places
Weight
#1,726 vs #11,303
TRON S-G3R.12+ / BFG 440 leads by 9,577 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,117 vs #2,867
PEAK DUO ML-G12S.3 / BFG 665 leads by 4,250 places
05

More useful comparisons

Open the full database
Same series, other bin
Q-Cells Q.TRON S-G3R.12+ / BFG 440 vs Q-Cells Q.TRON S-G3R.12+ / BFG 450
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON S-G3R.12+ / BFG 440 vs Q-Cells Q.TRON S-G3R.12+ / BFG 445
One difference: module efficiency
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670
One difference: module efficiency
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660
One difference: module efficiency
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 655
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Q-Cells Q.TRON S-G3R.12+ / BFG 440 or Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665?
According to our database: Q-Cells Q.TRON S-G3R.12+ / BFG 440 has higher module efficiency (22.00% vs 21.40%); Q-Cells Q.TRON S-G3R.12+ / BFG 440 tolerates heat better (temp coeff -0.300%/°C vs -0.340%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Q-Cells Q.TRON S-G3R.12+ / BFG 440 and Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665?
Q-Cells Q.TRON S-G3R.12+ / BFG 440 has a module efficiency of 22.00%, while Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 is 21.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Q-Cells Q.TRON S-G3R.12+ / BFG 440 use vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665?
Q-Cells Q.TRON S-G3R.12+ / BFG 440 uses TOPCon cells; Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 uses Monocrystalline. 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.TRON S-G3R.12+ / BFG 440 and Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665?
Q-Cells Q.TRON S-G3R.12+ / BFG 440 has a 30 years power warranty; Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 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.TRON S-G3R.12+ / BFG 440 and Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 bifacial panels?
Both Q-Cells Q.TRON S-G3R.12+ / BFG 440 and Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 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.