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

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

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
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

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

Full specification

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

Against the whole database

14,129 panels
Efficiency
#6,580 vs #5,881
XL-G2.3 / BFG 620 leads by 699 places
Power density
#6,544 vs #5,911
XL-G2.3 / BFG 620 leads by 633 places
Heat behaviour
#2,220 vs #6,152
BLK M-G2+ 430 leads by 3,932 places
Weight
#2,862 vs #11,133
BLK M-G2+ 430 leads by 8,271 places
Warranty
#9,912 vs #21
XL-G2.3 / BFG 620 leads by 9,891 places
Overall
#8,702 vs #3,514
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 BLK M-G2+ 430 vs Q-Cells Q.TRON BLK M-G2.H1+/AC (Power class 440W)
8 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 430 vs Q-Cells Q.TRON BLK M-G2+ 440
3 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 430 vs Q-Cells Q.TRON BLK M-G2.D1+/AC (Power class 435W)
6 differences, the largest is module efficiency
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 430 vs Q-Cells Q.TRON BLK M-G2+ 435
One difference: module efficiency
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 430 vs Q-Cells Q.TRON BLK M-G2.C1+/AC (Power class 430W)
5 differences, the largest is weight per kwp
Same series, other bin
Q-Cells Q.TRON BLK M-G2+ 430 vs Q-Cells Q.TRON BLK M-G2.E1+/AC (Power class 425W)
6 differences, the largest is weight per kwp
06

Written summary

07

Questions about this pairing

Which panel is better: Q-Cells Q.TRON BLK M-G2+ 430 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 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 BLK M-G2+ 430 and Q-Cells Q.TRON XL-G2.3 / BFG 620?
Q-Cells Q.TRON BLK M-G2+ 430 has a module efficiency of 22.00%, 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 BLK M-G2+ 430 use vs Q-Cells Q.TRON XL-G2.3 / BFG 620?
Q-Cells Q.TRON BLK M-G2+ 430 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 BLK M-G2+ 430 and Q-Cells Q.TRON XL-G2.3 / BFG 620?
Q-Cells Q.TRON BLK M-G2+ 430 has a 25 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 BLK M-G2+ 430 and Q-Cells Q.TRON XL-G2.3 / BFG 620 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.

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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.