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PEAK DUO ML-G12S.3 / BFG 670 vs TRON XL-G2.3 / BFG 640 5 of 18 identical Swap Change panels

Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670 vs Q-Cells Q.TRON XL-G2.3 / BFG 640

Q.PEAK DUO ML-G12S.3 / BFG 670
670 Wp 21.60 % Bifacial
Open panel page Datasheet PDF
VS
Q-Cells Q.TRON XL-G2.3 / BFG 640
Q.TRON XL-G2.3 / BFG 640
640 Wp 22.90 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

TRON XL-G2.3 / BFG 640 leads on the differences that matter

The largest is module efficiency: 1.30 pp more efficient. 5 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 13 differences
How alike are they
5 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

13 of 18 parameters
Parameter PEAK DUO ML-G12S.3 / BFG 670 TRON XL-G2.3 / BFG 640 Difference
Module efficiency 21.60 % 22.90 % 1.30 pp more efficient
Temperature coefficient -0.340 %/°C -0.290 %/°C 0.050 %/°C better in heat
Power density 215.7 Wp/m² 229.2 Wp/m² 13.5 Wp/m² higher
Rated power 670 Wp 640 Wp 30 W more power
Annual degradation 0.45 %/yr 0.33 %/yr 0.12 %/yr slower
Weight 38.2 kg 35.4 kg 2.8 kg lighter
Open-circuit voltage 45.72 V 57.79 V 12.07 V apart
Short-circuit current 18.42 A 13.99 A 4.43 A apart
Module area 3.106 m² 2.792 m² 0.314 m² apart
Voltage at max power 38.27 V 48.28 V 10.01 V apart
Current at max power 17.51 A 13.26 A 4.25 A apart
Cell count 132 156 24 cells apart
Dimensions 2384x1303x35 mm 2462x1134x35 mm 2384x1303x35 mm vs 2462x1134x35 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 670
22,064 kWh
TRON XL-G2.3 / BFG 640
21,592 kWh
Lifetime gap
472 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario PEAK DUO ML-G12S.3 / BFG 670 TRON XL-G2.3 / BFG 640
Standard test conditions 25 °C 100.0% of rated power 670 W 640 W
Cool, bright day 40 °C 94.9% of rated power 636 W 612 W
Typical summer roof 55 °C 89.8% of rated power 602 W 584 W
Hot roof 70 °C 84.7% of rated power 567 W 556 W
03

Full specification

Parameter PEAK DUO ML-G12S.3 / BFG 670 TRON XL-G2.3 / BFG 640 Difference
Power and efficiency
Rated power 670 Wp 640 Wp +30 W for PEAK DUO ML-G12S.3 / BFG 670
Module efficiency 21.60 % 22.90 % +1.30 pp for TRON XL-G2.3 / BFG 640
Power density 215.7 Wp/m² 229.2 Wp/m² +13.5 Wp/m² for TRON XL-G2.3 / BFG 640
Open-circuit voltage 45.72 V 57.79 V 12.07 V apart
Voltage at max power 38.27 V 48.28 V 10.01 V apart
Short-circuit current 18.42 A 13.99 A 4.43 A apart
Current at max power 17.51 A 13.26 A 4.25 A apart
Temperature
Temperature coefficient -0.340 %/°C -0.290 %/°C +0.050 %/°C for TRON XL-G2.3 / BFG 640
Mechanical
Dimensions 2384x1303x35 mm 2462x1134x35 mm 2384x1303x35 mm vs 2462x1134x35 mm
Module area 3.106 m² 2.792 m² 0.314 m² apart
Weight 38.2 kg 35.4 kg -2.8 kg for TRON XL-G2.3 / BFG 640
Weight per kWp 57.0 kg/kWp 55.3 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.45 %/yr 0.33 %/yr -0.12 %/yr for TRON XL-G2.3 / BFG 640
Technology
Cell technology - N-type Not published by Q-Cells
Cell type Monocrystalline Monocrystalline Same
Cell count 132 156 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#7,652 vs #2,359
TRON XL-G2.3 / BFG 640 leads by 5,293 places
Power density
#7,644 vs #2,368
TRON XL-G2.3 / BFG 640 leads by 5,276 places
Heat behaviour
#8,778 vs #2,165
TRON XL-G2.3 / BFG 640 leads by 6,613 places
Weight
#11,008 vs #9,773
TRON XL-G2.3 / BFG 640 leads by 1,235 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,462 vs #2,116
TRON XL-G2.3 / BFG 640 leads by 346 places
05

More useful comparisons

Open the full database
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675
The same specification on paper
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665
One difference: module efficiency
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670 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 670 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 XL-G2.3 / BFG 640 vs Q-Cells Q.TRON XL-G2.3 / BFG 645
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 670 or Q-Cells Q.TRON XL-G2.3 / BFG 640?
According to our database: Q-Cells Q.TRON XL-G2.3 / BFG 640 has higher module efficiency (22.90% vs 21.60%); Q-Cells Q.TRON XL-G2.3 / BFG 640 tolerates heat better (temp coeff -0.290%/°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 670 and Q-Cells Q.TRON XL-G2.3 / BFG 640?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670 has a module efficiency of 21.60%, while Q-Cells Q.TRON XL-G2.3 / BFG 640 is 22.90%. 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 670 use vs Q-Cells Q.TRON XL-G2.3 / BFG 640?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670 uses Monocrystalline cells; Q-Cells Q.TRON XL-G2.3 / BFG 640 uses N-type. 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 670 and Q-Cells Q.TRON XL-G2.3 / BFG 640?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670 has a 30 years power warranty; Q-Cells Q.TRON XL-G2.3 / BFG 640 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 670 and Q-Cells Q.TRON XL-G2.3 / BFG 640 bifacial panels?
Both Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670 and Q-Cells Q.TRON XL-G2.3 / BFG 640 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.