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PEAK DUO ML-G12S.3 / BFG 675 vs TRON XL-G2.3 / BFG 645 5 of 18 identical Swap Change panels

Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 vs Q-Cells Q.TRON XL-G2.3 / BFG 645

Q.PEAK DUO ML-G12S.3 / BFG 675
675 Wp 21.70 % Bifacial
Open panel page Datasheet PDF
VS
Q-Cells Q.TRON XL-G2.3 / BFG 645
Q.TRON XL-G2.3 / BFG 645
645 Wp 23.10 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

TRON XL-G2.3 / BFG 645 leads on the differences that matter

The largest is module efficiency: 1.40 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 675 TRON XL-G2.3 / BFG 645 Difference
Module efficiency 21.70 % 23.10 % 1.40 pp more efficient
Temperature coefficient -0.340 %/°C -0.290 %/°C 0.050 %/°C better in heat
Power density 217.3 Wp/m² 231.0 Wp/m² 13.7 Wp/m² higher
Rated power 675 Wp 645 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 45.74 V 58.07 V 12.33 V apart
Short-circuit current 18.45 A 14.05 A 4.40 A apart
Module area 3.106 m² 2.792 m² 0.314 m² apart
Voltage at max power 38.43 V 48.47 V 10.04 V apart
Current at max power 17.56 A 13.31 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 675
22,228 kWh
TRON XL-G2.3 / BFG 645
21,761 kWh
Lifetime gap
467 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario PEAK DUO ML-G12S.3 / BFG 675 TRON XL-G2.3 / BFG 645
Standard test conditions 25 °C 100.0% of rated power 675 W 645 W
Cool, bright day 40 °C 94.9% of rated power 641 W 617 W
Typical summer roof 55 °C 89.8% of rated power 606 W 589 W
Hot roof 70 °C 84.7% of rated power 572 W 561 W
03

Full specification

Parameter PEAK DUO ML-G12S.3 / BFG 675 TRON XL-G2.3 / BFG 645 Difference
Power and efficiency
Rated power 675 Wp 645 Wp +30 W for PEAK DUO ML-G12S.3 / BFG 675
Module efficiency 21.70 % 23.10 % +1.40 pp for TRON XL-G2.3 / BFG 645
Power density 217.3 Wp/m² 231.0 Wp/m² +13.7 Wp/m² for TRON XL-G2.3 / BFG 645
Open-circuit voltage 45.74 V 58.07 V 12.33 V apart
Voltage at max power 38.43 V 48.47 V 10.04 V apart
Short-circuit current 18.45 A 14.05 A 4.40 A apart
Current at max power 17.56 A 13.31 A 4.25 A apart
Temperature
Temperature coefficient -0.340 %/°C -0.290 %/°C +0.050 %/°C for TRON XL-G2.3 / BFG 645
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 645
Weight per kWp 56.6 kg/kWp 54.9 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 645
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
#7,421 vs #1,570
TRON XL-G2.3 / BFG 645 leads by 5,851 places
Power density
#7,349 vs #1,629
TRON XL-G2.3 / BFG 645 leads by 5,720 places
Heat behaviour
#8,778 vs #2,165
TRON XL-G2.3 / BFG 645 leads by 6,613 places
Weight
#10,738 vs #9,271
TRON XL-G2.3 / BFG 645 leads by 1,467 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,198 vs #1,826
TRON XL-G2.3 / BFG 645 leads by 372 places
05

More useful comparisons

Open the full database
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670
The same specification on paper
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 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 675 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 675 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 650
4 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 645 vs Q-Cells Q.TRON XL-G2.3 / BFG 640
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 675 or Q-Cells Q.TRON XL-G2.3 / BFG 645?
According to our database: Q-Cells Q.TRON XL-G2.3 / BFG 645 has higher module efficiency (23.10% vs 21.70%); Q-Cells Q.TRON XL-G2.3 / BFG 645 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 675 and Q-Cells Q.TRON XL-G2.3 / BFG 645?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 has a module efficiency of 21.70%, while Q-Cells Q.TRON XL-G2.3 / BFG 645 is 23.10%. 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 675 use vs Q-Cells Q.TRON XL-G2.3 / BFG 645?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 uses Monocrystalline cells; Q-Cells Q.TRON XL-G2.3 / BFG 645 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 675 and Q-Cells Q.TRON XL-G2.3 / BFG 645?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 has a 30 years power warranty; Q-Cells Q.TRON XL-G2.3 / BFG 645 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 675 and Q-Cells Q.TRON XL-G2.3 / BFG 645 bifacial panels?
Both Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675 and Q-Cells Q.TRON XL-G2.3 / BFG 645 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.