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610 vs 620 16 of 19 identical Swap Change panels

Q-Cells Q.TRON XL-G2.3 / BFG 610 vs Q-Cells Q.TRON XL-G2.3 / BFG 620

Q-Cells Q.TRON XL-G2.3 / BFG 610
Q.TRON XL-G2.3 / BFG 610
610 Wp 21.80 % N-type Bifacial
Open panel page Datasheet PDF
VS
Q-Cells Q.TRON XL-G2.3 / BFG 620
Q.TRON XL-G2.3 / BFG 620
620 Wp 22.20 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

620 leads on the differences that matter

The largest is module efficiency: 0.40 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 610 620 Difference
Module efficiency 21.80 % 22.20 % 0.40 pp more efficient
Power density 218.5 Wp/m² 222.1 Wp/m² 3.6 Wp/m² higher
Rated power 610 Wp 620 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.
610
20,580 kWh
620
20,917 kWh
Lifetime gap
337 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 610 620
Standard test conditions 25 °C 100.0% of rated power 610 W 620 W
Cool, bright day 40 °C 95.5% of rated power 583 W 592 W
Typical summer roof 55 °C 91.0% of rated power 555 W 564 W
Hot roof 70 °C 86.5% of rated power 528 W 536 W
03

Full specification

Parameter 610 620 Difference
Power and efficiency
Rated power 610 Wp 620 Wp +10 W for 620
Module efficiency 21.80 % 22.20 % +0.40 pp for 620
Power density 218.5 Wp/m² 222.1 Wp/m² +3.6 Wp/m² for 620
Open-circuit voltage 56.11 V 56.67 V Effectively the same
Voltage at max power 47.10 V 47.50 V Effectively the same
Short-circuit current 13.65 A 13.76 A Effectively the same
Current at max power 12.95 A 13.05 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 2462x1134x35 mm 2462x1134x35 mm Same
Module area 2.792 m² 2.792 m² Same
Weight 35.4 kg 35.4 kg Same
Weight per kWp 58.0 kg/kWp 57.1 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.33 %/yr 0.33 %/yr Same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 156 156 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#7,022 vs #5,817
620 leads by 1,205 places
Power density
#6,949 vs #5,847
620 leads by 1,102 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#11,534 vs #11,047
620 leads by 487 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,284 vs #3,468
620 leads by 816 places
05

More useful comparisons

Open the full database
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 610 vs Q-Cells Q.TRON XL-G2.3 / BFG 645
7 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 610 vs Q-Cells Q.TRON XL-G2.3 / BFG 640
7 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 610 vs Q-Cells Q.TRON XL-G2.3 / BFG 635
5 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 610 vs Q-Cells Q.TRON XL-G2.3 / BFG 630
4 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 610 vs Q-Cells Q.TRON XL-G2.3 / BFG 625
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 610 vs Q-Cells Q.TRON XL-G2.3 / BFG 615
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Q-Cells Q.TRON XL-G2.3 / BFG 610 or Q-Cells Q.TRON XL-G2.3 / BFG 620?
According to our database: Q-Cells Q.TRON XL-G2.3 / BFG 620 has higher module efficiency (22.20% vs 21.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Q-Cells Q.TRON XL-G2.3 / BFG 610 and Q-Cells Q.TRON XL-G2.3 / BFG 620?
Q-Cells Q.TRON XL-G2.3 / BFG 610 has a module efficiency of 21.80%, while Q-Cells Q.TRON XL-G2.3 / BFG 620 is 22.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Q-Cells Q.TRON XL-G2.3 / BFG 610 use vs Q-Cells Q.TRON XL-G2.3 / BFG 620?
Q-Cells Q.TRON XL-G2.3 / BFG 610 uses N-type cells; Q-Cells Q.TRON XL-G2.3 / BFG 620 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.TRON XL-G2.3 / BFG 610 and Q-Cells Q.TRON XL-G2.3 / BFG 620?
Q-Cells Q.TRON XL-G2.3 / BFG 610 has a 30 years power warranty; Q-Cells Q.TRON XL-G2.3 / BFG 620 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 XL-G2.3 / BFG 610 and Q-Cells Q.TRON XL-G2.3 / BFG 620 bifacial panels?
Both Q-Cells Q.TRON XL-G2.3 / BFG 610 and Q-Cells Q.TRON XL-G2.3 / BFG 620 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.