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440 vs 450 16 of 19 identical Swap Change panels

Q-Cells Q.TRON S-G3R.12+ / BFG 440 vs Q-Cells Q.TRON S-G3R.12+ / BFG 450

Q.TRON S-G3R.12+ / BFG 440
440 Wp 22.00 % TOPCon 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

450 leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 440 450 Difference
Module efficiency 22.00 % 22.50 % 0.50 pp more efficient
Power density 220.2 Wp/m² 225.2 Wp/m² 5.0 Wp/m² higher
Rated power 440 Wp 450 Wp 10 W more power
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
Same temp coeff. for both panels (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
440
14,844 kWh
450
15,182 kWh
Lifetime gap
338 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 440 450
Standard test conditions 25 °C 100.0% of rated power 440 W 450 W
Cool, bright day 40 °C 95.5% of rated power 420 W 430 W
Typical summer roof 55 °C 91.0% of rated power 400 W 410 W
Hot roof 70 °C 86.5% of rated power 381 W 389 W
03

Full specification

Parameter 440 450 Difference
Power and efficiency
Rated power 440 Wp 450 Wp +10 W for 450
Module efficiency 22.00 % 22.50 % +0.50 pp for 450
Power density 220.2 Wp/m² 225.2 Wp/m² +5.0 Wp/m² for 450
Open-circuit voltage 34.67 V 35.03 V Effectively the same
Voltage at max power 29.72 V 30.08 V Effectively the same
Short-circuit current 15.95 A 16.05 A Effectively the same
Current at max power 14.81 A 14.97 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1762x1134x30 mm Same
Module area 1.998 m² 1.998 m² Same
Weight 20.9 kg 20.9 kg Same
Weight per kWp 47.5 kg/kWp 46.4 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.33 %/yr 0.33 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 96 96 Same
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#6,580 vs #4,281
450 leads by 2,299 places
Power density
#6,391 vs #4,284
450 leads by 2,107 places
Heat behaviour
#6,152 vs #6,152
Tied - the same position in the database
Weight
#1,726 vs #1,162
450 leads by 564 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,117 vs #6,092
450 leads by 1,025 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 445
One difference: module efficiency
Same manufacturer
Q-Cells Q.TRON S-G3R.12+ / BFG 440 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675
14 differences, the largest is temperature coefficient
Same manufacturer
Q-Cells Q.TRON S-G3R.12+ / BFG 440 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670
15 differences, the largest is temperature coefficient
Same manufacturer
Q-Cells Q.TRON S-G3R.12+ / BFG 440 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665
15 differences, the largest is temperature coefficient
Same manufacturer
Q-Cells Q.TRON S-G3R.12+ / BFG 440 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 660
15 differences, the largest is module efficiency
Same manufacturer
Q-Cells Q.TRON S-G3R.12+ / BFG 440 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 655
15 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.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 22.00%). 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.TRON S-G3R.12+ / BFG 450?
Q-Cells Q.TRON S-G3R.12+ / BFG 440 has a module efficiency of 22.00%, 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.TRON S-G3R.12+ / BFG 440 use vs Q-Cells Q.TRON S-G3R.12+ / BFG 450?
Q-Cells Q.TRON S-G3R.12+ / BFG 440 uses TOPCon 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.TRON S-G3R.12+ / BFG 440 and Q-Cells Q.TRON S-G3R.12+ / BFG 450?
Q-Cells Q.TRON S-G3R.12+ / BFG 440 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.TRON S-G3R.12+ / BFG 440 and Q-Cells Q.TRON S-G3R.12+ / BFG 450 bifacial panels?
Both Q-Cells Q.TRON S-G3R.12+ / BFG 440 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.