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PEAK DUO ML-G12S.3 / BFG 660 vs TRON XL-G2.3 / BFG 645 4 of 18 identical Swap Change panels

Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660 vs Q-Cells Q.TRON XL-G2.3 / BFG 645

Q.PEAK DUO ML-G12S.3 / BFG 660
660 Wp 21.20 % 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: 1.90 pp more efficient. 4 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 14 differences
How alike are they
4 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

14 of 18 parameters
Parameter PEAK DUO ML-G12S.3 / BFG 660 TRON XL-G2.3 / BFG 645 Difference
Module efficiency 21.20 % 23.10 % 1.90 pp more efficient
Temperature coefficient -0.340 %/°C -0.290 %/°C 0.050 %/°C better in heat
Power density 212.5 Wp/m² 231.0 Wp/m² 18.6 Wp/m² higher
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 45.68 V 58.07 V 12.39 V apart
Short-circuit current 18.36 A 14.05 A 4.31 A apart
Module area 3.106 m² 2.792 m² 0.314 m² apart
Rated power 660 Wp 645 Wp 15 W more power
Weight per kWp 57.9 kg/kWp 54.9 kg/kWp 3.0 kg/kWp lighter
Voltage at max power 37.94 V 48.47 V 10.53 V apart
Current at max power 17.39 A 13.31 A 4.08 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 660
21,734 kWh
TRON XL-G2.3 / BFG 645
21,761 kWh
Lifetime gap
27 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario PEAK DUO ML-G12S.3 / BFG 660 TRON XL-G2.3 / BFG 645
Standard test conditions 25 °C 100.0% of rated power 660 W 645 W
Cool, bright day 40 °C 94.9% of rated power 626 W 617 W
Typical summer roof 55 °C 89.8% of rated power 593 W 589 W
Hot roof 70 °C 84.7% of rated power 559 W 561 W
03

Full specification

Parameter PEAK DUO ML-G12S.3 / BFG 660 TRON XL-G2.3 / BFG 645 Difference
Power and efficiency
Rated power 660 Wp 645 Wp +15 W for PEAK DUO ML-G12S.3 / BFG 660
Module efficiency 21.20 % 23.10 % +1.90 pp for TRON XL-G2.3 / BFG 645
Power density 212.5 Wp/m² 231.0 Wp/m² +18.6 Wp/m² for TRON XL-G2.3 / BFG 645
Open-circuit voltage 45.68 V 58.07 V 12.39 V apart
Voltage at max power 37.94 V 48.47 V 10.53 V apart
Short-circuit current 18.36 A 14.05 A 4.31 A apart
Current at max power 17.39 A 13.31 A 4.08 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 57.9 kg/kWp 54.9 kg/kWp -3.0 kg/kWp for TRON XL-G2.3 / BFG 645
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
#9,076 vs #1,570
TRON XL-G2.3 / BFG 645 leads by 7,506 places
Power density
#8,959 vs #1,629
TRON XL-G2.3 / BFG 645 leads by 7,330 places
Heat behaviour
#8,778 vs #2,165
TRON XL-G2.3 / BFG 645 leads by 6,613 places
Weight
#11,467 vs #9,271
TRON XL-G2.3 / BFG 645 leads by 2,196 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#3,228 vs #1,826
TRON XL-G2.3 / BFG 645 leads by 1,402 places
05

More useful comparisons

Open the full database
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660 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 660 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660 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 660 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 655
The same specification on paper
Same series, other bin
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660 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 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 660 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 21.20%); 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 660 and Q-Cells Q.TRON XL-G2.3 / BFG 645?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660 has a module efficiency of 21.20%, 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 660 use vs Q-Cells Q.TRON XL-G2.3 / BFG 645?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660 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 660 and Q-Cells Q.TRON XL-G2.3 / BFG 645?
Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660 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 660 and Q-Cells Q.TRON XL-G2.3 / BFG 645 bifacial panels?
Both Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660 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.