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450 vs 440 16 of 19 identical Swap Change panels

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

Q.TRON S-G3R.12+ / BFG 450
450 Wp 22.50 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Q.TRON S-G3R.12+ / BFG 440
440 Wp 22.00 % 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 450 440 Difference
Module efficiency 22.50 % 22.00 % 0.50 pp more efficient
Power density 225.2 Wp/m² 220.2 Wp/m² 5.0 Wp/m² higher
Rated power 450 Wp 440 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.
450
15,182 kWh
440
14,844 kWh
Lifetime gap
338 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 450 440
Standard test conditions 25 °C 100.0% of rated power 450 W 440 W
Cool, bright day 40 °C 95.5% of rated power 430 W 420 W
Typical summer roof 55 °C 91.0% of rated power 410 W 400 W
Hot roof 70 °C 86.5% of rated power 389 W 381 W
03

Full specification

Parameter 450 440 Difference
Power and efficiency
Rated power 450 Wp 440 Wp +10 W for 450
Module efficiency 22.50 % 22.00 % +0.50 pp for 450
Power density 225.2 Wp/m² 220.2 Wp/m² +5.0 Wp/m² for 450
Open-circuit voltage 35.03 V 34.67 V Effectively the same
Voltage at max power 30.08 V 29.72 V Effectively the same
Short-circuit current 16.05 A 15.95 A Effectively the same
Current at max power 14.97 A 14.81 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 46.4 kg/kWp 47.5 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
#4,281 vs #6,580
450 leads by 2,299 places
Power density
#4,284 vs #6,391
450 leads by 2,107 places
Heat behaviour
#6,152 vs #6,152
Tied - the same position in the database
Weight
#1,162 vs #1,726
450 leads by 564 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,092 vs #7,117
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 450 vs Q-Cells Q.TRON S-G3R.12+ / BFG 445
One difference: module efficiency
Same manufacturer
Q-Cells Q.TRON S-G3R.12+ / BFG 450 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 675
15 differences, the largest is module efficiency
Same manufacturer
Q-Cells Q.TRON S-G3R.12+ / BFG 450 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 670
15 differences, the largest is module efficiency
Same manufacturer
Q-Cells Q.TRON S-G3R.12+ / BFG 450 vs Q-Cells Q.PEAK DUO ML-G12S.3 / BFG 665
15 differences, the largest is module efficiency
Same manufacturer
Q-Cells Q.TRON S-G3R.12+ / BFG 450 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 450 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 450 or Q-Cells Q.TRON S-G3R.12+ / BFG 440?
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 450 and Q-Cells Q.TRON S-G3R.12+ / BFG 440?
Q-Cells Q.TRON S-G3R.12+ / BFG 450 has a module efficiency of 22.50%, while Q-Cells Q.TRON S-G3R.12+ / BFG 440 is 22.00%. 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 450 use vs Q-Cells Q.TRON S-G3R.12+ / BFG 440?
Q-Cells Q.TRON S-G3R.12+ / BFG 450 uses TOPCon cells; Q-Cells Q.TRON S-G3R.12+ / BFG 440 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 450 and Q-Cells Q.TRON S-G3R.12+ / BFG 440?
Q-Cells Q.TRON S-G3R.12+ / BFG 450 has a 30 years power warranty; Q-Cells Q.TRON S-G3R.12+ / BFG 440 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 450 and Q-Cells Q.TRON S-G3R.12+ / BFG 440 bifacial panels?
Both Q-Cells Q.TRON S-G3R.12+ / BFG 450 and Q-Cells Q.TRON S-G3R.12+ / BFG 440 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.