Skip to main content
XL-G2.3 / BFG 620 vs BLK M-G2+ 430 6 of 19 identical Swap Change panels

Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON BLK M-G2+ 430

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
VS
Q-Cells Q.TRON BLK M-G2+ 430
Q.TRON BLK M-G2+ 430
430 Wp 22.00 % N-type
Open panel page Datasheet PDF
The verdict

13 differences, and they point both ways

The largest is rated power: 190 W more power. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter XL-G2.3 / BFG 620 BLK M-G2+ 430 Difference
Rated power 620 Wp 430 Wp 190 W more power
Performance warranty 30 yrs 25 yrs 5 yrs longer
Weight 35.4 kg 21.2 kg 14.2 kg lighter
Product warranty 12 yrs 25 yrs 13 yrs longer
Weight per kWp 57.1 kg/kWp 49.3 kg/kWp 7.8 kg/kWp lighter
Open-circuit voltage 56.67 V 39.32 V 17.35 V apart
Module area 2.792 m² 1.953 m² 0.839 m² apart
Temperature coefficient -0.300 %/°C -0.290 %/°C 0.010 %/°C better in heat
Module efficiency 22.20 % 22.00 % 0.20 pp more efficient
Voltage at max power 47.50 V 32.94 V 14.56 V apart
Cell count 156 108 48 cells apart
Bifacial Yes No Yes vs No
Dimensions 2462x1134x35 mm 1722x1134x30 mm 2462x1134x35 mm vs 1722x1134x30 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
XL-G2.3 / BFG 620
20,917 kWh
BLK M-G2+ 430
14,507 kWh
Lifetime gap
6,410 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario XL-G2.3 / BFG 620 BLK M-G2+ 430
Standard test conditions 25 °C 100.0% of rated power 620 W 430 W
Cool, bright day 40 °C 95.5% of rated power 592 W 411 W
Typical summer roof 55 °C 91.0% of rated power 564 W 393 W
Hot roof 70 °C 86.5% of rated power 536 W 374 W
03

Full specification

Parameter XL-G2.3 / BFG 620 BLK M-G2+ 430 Difference
Power and efficiency
Rated power 620 Wp 430 Wp +190 W for XL-G2.3 / BFG 620
Module efficiency 22.20 % 22.00 % +0.20 pp for XL-G2.3 / BFG 620
Power density 222.1 Wp/m² 220.2 Wp/m² Effectively the same
Open-circuit voltage 56.67 V 39.32 V 17.35 V apart
Voltage at max power 47.50 V 32.94 V 14.56 V apart
Short-circuit current 13.76 A 13.74 A Effectively the same
Current at max power 13.05 A 13.05 A Same
Temperature
Temperature coefficient -0.300 %/°C -0.290 %/°C +0.010 %/°C for BLK M-G2+ 430
Mechanical
Dimensions 2462x1134x35 mm 1722x1134x30 mm 2462x1134x35 mm vs 1722x1134x30 mm
Module area 2.792 m² 1.953 m² 0.839 m² apart
Weight 35.4 kg 21.2 kg -14.2 kg for BLK M-G2+ 430
Weight per kWp 57.1 kg/kWp 49.3 kg/kWp -7.8 kg/kWp for BLK M-G2+ 430
Warranty and degradation
Product warranty 12 yrs 25 yrs +13 yrs for BLK M-G2+ 430
Performance warranty 30 yrs 25 yrs +5 yrs for XL-G2.3 / BFG 620
Annual degradation 0.33 %/yr 0.33 %/yr Same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 156 108 48 cells apart
Bifacial Yes No Yes vs No
04

Against the whole database

14,129 panels
Efficiency
#5,881 vs #6,580
XL-G2.3 / BFG 620 leads by 699 places
Power density
#5,911 vs #6,544
XL-G2.3 / BFG 620 leads by 633 places
Heat behaviour
#6,152 vs #2,220
BLK M-G2+ 430 leads by 3,932 places
Weight
#11,133 vs #2,862
BLK M-G2+ 430 leads by 8,271 places
Warranty
#21 vs #9,912
XL-G2.3 / BFG 620 leads by 9,891 places
Overall
#3,514 vs #8,702
XL-G2.3 / BFG 620 leads by 5,188 places
05

More useful comparisons

Open the full database
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 645
6 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 640
5 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 635
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 630
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 620 vs Q-Cells Q.TRON XL-G2.3 / BFG 625
One difference: module efficiency
Same series, other bin
Q-Cells Q.TRON XL-G2.3 / BFG 620 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 620 or Q-Cells Q.TRON BLK M-G2+ 430?
According to our database: Q-Cells Q.TRON XL-G2.3 / BFG 620 has higher module efficiency (22.20% vs 22.00%); Q-Cells Q.TRON BLK M-G2+ 430 tolerates heat better (temp coeff -0.290%/°C vs -0.300%/°C). 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 620 and Q-Cells Q.TRON BLK M-G2+ 430?
Q-Cells Q.TRON XL-G2.3 / BFG 620 has a module efficiency of 22.20%, while Q-Cells Q.TRON BLK M-G2+ 430 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 XL-G2.3 / BFG 620 use vs Q-Cells Q.TRON BLK M-G2+ 430?
Q-Cells Q.TRON XL-G2.3 / BFG 620 uses N-type cells; Q-Cells Q.TRON BLK M-G2+ 430 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 620 and Q-Cells Q.TRON BLK M-G2+ 430?
Q-Cells Q.TRON XL-G2.3 / BFG 620 has a 30 years power warranty; Q-Cells Q.TRON BLK M-G2+ 430 has a 25 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 620 and Q-Cells Q.TRON BLK M-G2+ 430 bifacial panels?
Q-Cells Q.TRON XL-G2.3 / BFG 620 is bifacial (captures light from both faces); Q-Cells Q.TRON BLK M-G2+ 430 is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Shop prices: See 18 Q-Cells offers

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.