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PEAK DUO ML-G12S.3 / BFG 665 vs TRON S-G3R.12+ / BFG 450 3 of 18 identical Swap Change panels

Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 vs Q-Cells Q.TRON S-G3R.12+ / BFG 450

Q.PEAK DUO ML-G12S.3 / BFG 665
665 Wp 21.40 % Bifacial
Open panel page Datasheet PDF
VS
Q.TRON S-G3R.12+ / BFG 450
450 Wp 22.50 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

TRON S-G3R.12+ / BFG 450 leads on the differences that matter

The largest is module efficiency: 1.10 pp more efficient. 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 PEAK DUO ML-G12S.3 / BFG 665 TRON S-G3R.12+ / BFG 450 Difference
Module efficiency 21.40 % 22.50 % 1.10 pp more efficient
Temperature coefficient -0.340 %/°C -0.300 %/°C 0.040 %/°C better in heat
Rated power 665 Wp 450 Wp 215 W more power
Power density 214.1 Wp/m² 225.2 Wp/m² 11.1 Wp/m² higher
Weight 38.2 kg 20.9 kg 17.3 kg lighter
Weight per kWp 57.4 kg/kWp 46.4 kg/kWp 11.0 kg/kWp lighter
Product warranty 12 yrs 25 yrs 13 yrs longer
Annual degradation 0.45 %/yr 0.33 %/yr 0.12 %/yr slower
Open-circuit voltage 45.70 V 35.03 V 10.67 V apart
Short-circuit current 18.39 A 16.05 A 2.34 A apart
Module area 3.106 m² 1.998 m² 1.108 m² apart
Voltage at max power 38.11 V 30.08 V 8.03 V apart
Current at max power 17.45 A 14.97 A 2.48 A apart
Cell count 132 96 36 cells apart
Dimensions 2384x1303x35 mm 1762x1134x30 mm 2384x1303x35 mm vs 1762x1134x30 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
PEAK DUO ML-G12S.3 / BFG 665
21,899 kWh
TRON S-G3R.12+ / BFG 450
15,182 kWh
Lifetime gap
6,717 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario PEAK DUO ML-G12S.3 / BFG 665 TRON S-G3R.12+ / BFG 450
Standard test conditions 25 °C 100.0% of rated power 665 W 450 W
Cool, bright day 40 °C 94.9% of rated power 631 W 430 W
Typical summer roof 55 °C 89.8% of rated power 597 W 410 W
Hot roof 70 °C 84.7% of rated power 563 W 389 W
03

Full specification

Parameter PEAK DUO ML-G12S.3 / BFG 665 TRON S-G3R.12+ / BFG 450 Difference
Power and efficiency
Rated power 665 Wp 450 Wp +215 W for PEAK DUO ML-G12S.3 / BFG 665
Module efficiency 21.40 % 22.50 % +1.10 pp for TRON S-G3R.12+ / BFG 450
Power density 214.1 Wp/m² 225.2 Wp/m² +11.1 Wp/m² for TRON S-G3R.12+ / BFG 450
Open-circuit voltage 45.70 V 35.03 V 10.67 V apart
Voltage at max power 38.11 V 30.08 V 8.03 V apart
Short-circuit current 18.39 A 16.05 A 2.34 A apart
Current at max power 17.45 A 14.97 A 2.48 A apart
Temperature
Temperature coefficient -0.340 %/°C -0.300 %/°C +0.040 %/°C for TRON S-G3R.12+ / BFG 450
Mechanical
Dimensions 2384x1303x35 mm 1762x1134x30 mm 2384x1303x35 mm vs 1762x1134x30 mm
Module area 3.106 m² 1.998 m² 1.108 m² apart
Weight 38.2 kg 20.9 kg -17.3 kg for TRON S-G3R.12+ / BFG 450
Weight per kWp 57.4 kg/kWp 46.4 kg/kWp -11.0 kg/kWp for TRON S-G3R.12+ / BFG 450
Warranty and degradation
Product warranty 12 yrs 25 yrs +13 yrs for TRON S-G3R.12+ / BFG 450
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.45 %/yr 0.33 %/yr -0.12 %/yr for TRON S-G3R.12+ / BFG 450
Technology
Cell technology - TOPCon Not published by Q-Cells
Cell type Monocrystalline Monocrystalline Same
Cell count 132 96 36 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#8,388 vs #4,281
TRON S-G3R.12+ / BFG 450 leads by 4,107 places
Power density
#8,315 vs #4,284
TRON S-G3R.12+ / BFG 450 leads by 4,031 places
Heat behaviour
#8,846 vs #6,152
TRON S-G3R.12+ / BFG 450 leads by 2,694 places
Weight
#11,303 vs #1,162
TRON S-G3R.12+ / BFG 450 leads by 10,141 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,867 vs #6,092
PEAK DUO ML-G12S.3 / BFG 665 leads by 3,225 places
05

More useful comparisons

Open the full database
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
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 650
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON S-G3R.12+ / BFG 450 vs Q-Cells Q.TRON S-G3R.12+ / BFG 445
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 or Q-Cells Q.TRON S-G3R.12+ / BFG 450?
According to our database: Q-Cells Q.TRON S-G3R.12+ / BFG 450 has higher module efficiency (22.50% vs 21.40%); Q-Cells Q.TRON S-G3R.12+ / BFG 450 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.PEAK DUO ML-G12S.3 / BFG 665 and Q-Cells Q.TRON S-G3R.12+ / BFG 450?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 has a module efficiency of 21.40%, while Q-Cells Q.TRON S-G3R.12+ / BFG 450 is 22.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 use vs Q-Cells Q.TRON S-G3R.12+ / BFG 450?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 uses Monocrystalline cells; Q-Cells Q.TRON S-G3R.12+ / BFG 450 uses TOPCon. 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 ML-G12S.3 / BFG 665 and Q-Cells Q.TRON S-G3R.12+ / BFG 450?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 has a 30 years power warranty; Q-Cells Q.TRON S-G3R.12+ / BFG 450 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 ML-G12S.3 / BFG 665 and Q-Cells Q.TRON S-G3R.12+ / BFG 450 bifacial panels?
Both Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665 and Q-Cells Q.TRON S-G3R.12+ / BFG 450 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.