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530 QM vs 620 XL 11 of 19 identical Swap Change panels

Silfab SIL-530 QM vs Silfab SIL-620 XL

Silfab
SIL-530 QM
530 Wp 22.30 % N-type
Open panel page Datasheet PDF
VS
Silfab
SIL-620 XL
620 Wp 22.20 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

620 XL leads on the differences that matter

The largest is rated power: 90 W more power. 11 of 19 comparable parameters are identical.

See all 8 differences
How alike are they
11 of 19 comparable
parameters are identical
identical differs
01

What actually differs

8 of 19 parameters
Parameter 530 QM 620 XL Difference
Rated power 530 Wp 620 Wp 90 W more power
Weight 26.2 kg 29.5 kg 3.3 kg lighter
Open-circuit voltage 47.74 V 57.21 V 9.47 V apart
Module area 2.377 m² 2.793 m² 0.416 m² apart
Voltage at max power 41.05 V 48.16 V 7.11 V apart
Cell count 132 156 24 cells apart
Bifacial No Yes No vs Yes
Dimensions 2098x1133x35 mm 2465x1133x35 mm 2098x1133x35 mm vs 2465x1133x35 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
Same temp coeff. for both panels (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
530 QM
17,868 kWh
620 XL
20,903 kWh
Lifetime gap
3,035 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 530 QM 620 XL
Standard test conditions 25 °C 100.0% of rated power 530 W 620 W
Cool, bright day 40 °C 95.7% of rated power 507 W 593 W
Typical summer roof 55 °C 91.3% of rated power 484 W 566 W
Hot roof 70 °C 87.0% of rated power 461 W 539 W
03

Full specification

Parameter 530 QM 620 XL Difference
Power and efficiency
Rated power 530 Wp 620 Wp +90 W for 620 XL
Module efficiency 22.30 % 22.20 % Effectively the same
Power density 223.0 Wp/m² 222.0 Wp/m² Effectively the same
Open-circuit voltage 47.74 V 57.21 V 9.47 V apart
Voltage at max power 41.05 V 48.16 V 7.11 V apart
Short-circuit current 13.71 A 13.55 A Effectively the same
Current at max power 12.91 A 12.87 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2098x1133x35 mm 2465x1133x35 mm 2098x1133x35 mm vs 2465x1133x35 mm
Module area 2.377 m² 2.793 m² 0.416 m² apart
Weight 26.2 kg 29.5 kg -3.3 kg for 530 QM
Weight per kWp 49.4 kg/kWp 47.6 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.30 %/yr 0.30 %/yr Same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 156 24 cells apart
Bifacial No Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#5,100 vs #5,817
530 QM leads by 717 places
Power density
#5,094 vs #5,849
530 QM leads by 755 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,957 vs #1,761
620 XL leads by 1,196 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#3,682 vs #1,404
620 XL leads by 2,278 places
05

More useful comparisons

Open the full database
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Silfab SIL-530 QM vs Silfab SIL-590 XM+
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Silfab SIL-530 QM vs Silfab SIL-580-XM+-BIFACIAL
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Silfab SIL-530 QM vs Silfab SIL-570 XM+ BIFACIAL
9 differences, the largest is rated power
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Silfab SIL-530 QM vs Silfab SIL-570 XM+
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06

Written summary

07

Questions about this pairing

Which panel is better: Silfab SIL-530 QM or Silfab SIL-620 XL?
According to our database: Silfab SIL-530 QM has higher module efficiency (22.30% vs 22.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Silfab SIL-530 QM and Silfab SIL-620 XL?
Silfab SIL-530 QM has a module efficiency of 22.30%, while Silfab SIL-620 XL is 22.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Silfab SIL-530 QM use vs Silfab SIL-620 XL?
Silfab SIL-530 QM uses N-type cells; Silfab SIL-620 XL 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 Silfab SIL-530 QM and Silfab SIL-620 XL?
Silfab SIL-530 QM has a 30 years power warranty; Silfab SIL-620 XL 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 Silfab SIL-530 QM and Silfab SIL-620 XL bifacial panels?
Silfab SIL-620 XL is bifacial (captures light from both faces); Silfab SIL-530 QM 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.