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520 QM vs 530 XM 15 of 19 identical Swap Change panels

Silfab SIL-520 QM vs Silfab SIL-530 XM

Silfab SIL-520 QM
Silfab
SIL-520 QM
520 Wp 21.90 % N-type
Open panel page Datasheet PDF
VS
Silfab SIL-530 XM
Silfab
SIL-530 XM
530 Wp 22.30 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

530 XM leads on the differences that matter

The largest is module efficiency: 0.40 pp more efficient. 15 of 19 comparable parameters are identical.

See all 4 differences
How alike are they
15 of 19 comparable
parameters are identical
identical differs
01

What actually differs

4 of 19 parameters
Parameter 520 QM 530 XM Difference
Module efficiency 21.90 % 22.30 % 0.40 pp more efficient
Power density 218.8 Wp/m² 223.0 Wp/m² 4.2 Wp/m² higher
Rated power 520 Wp 530 Wp 10 W more power
Bifacial No Yes No vs Yes
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.
520 QM
17,396 kWh
530 XM
17,785 kWh
Lifetime gap
389 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 520 QM 530 XM
Standard test conditions 25 °C 100.0% of rated power 520 W 530 W
Cool, bright day 40 °C 95.7% of rated power 497 W 507 W
Typical summer roof 55 °C 91.3% of rated power 475 W 484 W
Hot roof 70 °C 87.0% of rated power 452 W 461 W
03

Full specification

Parameter 520 QM 530 XM Difference
Power and efficiency
Rated power 520 Wp 530 Wp +10 W for 530 XM
Module efficiency 21.90 % 22.30 % +0.40 pp for 530 XM
Power density 218.8 Wp/m² 223.0 Wp/m² +4.2 Wp/m² for 530 XM
Open-circuit voltage 47.52 V 47.74 V Effectively the same
Voltage at max power 40.48 V 41.05 V Effectively the same
Short-circuit current 13.65 A 13.71 A Effectively the same
Current at max power 12.85 A 12.91 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2098x1133x35 mm 2098x1133x35 mm Same
Module area 2.377 m² 2.377 m² Same
Weight 26.2 kg 26.2 kg Same
Weight per kWp 50.4 kg/kWp 49.4 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.33 %/yr Effectively the same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial No Yes No vs Yes
04

Against the whole database

14,129 panels
Efficiency
#6,847 vs #5,161
530 XM leads by 1,686 places
Power density
#6,900 vs #5,156
530 XM leads by 1,744 places
Heat behaviour
#2,220 vs #2,220
Tied - the same position in the database
Weight
#3,778 vs #2,964
530 XM leads by 814 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,542 vs #3,730
530 XM leads by 812 places
05

More useful comparisons

Open the full database
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Silfab SIL-520 QM vs Silfab SIL-590 XM+
11 differences, the largest is module efficiency
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Silfab SIL-520 QM vs Silfab SIL-580-XM+-BIFACIAL
11 differences, the largest is rated power
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Silfab
Silfab SIL-520 QM vs Silfab SIL-570 XM+ BIFACIAL
9 differences, the largest is rated power
Same series, other bin
Silfab
Silfab SIL-520 QM vs Silfab SIL-570 XM+
10 differences, the largest is rated power
Same series, other bin
Silfab
Silfab SIL-520 QM vs Silfab SIL-520 XM
3 differences, the largest is cell technology
Same manufacturer
Silfab
Silfab SIL-520 QM vs Silfab SIL-640 XL
12 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Silfab SIL-520 QM or Silfab SIL-530 XM?
According to our database: Silfab SIL-530 XM has higher module efficiency (22.30% vs 21.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Silfab SIL-520 QM and Silfab SIL-530 XM?
Silfab SIL-520 QM has a module efficiency of 21.90%, while Silfab SIL-530 XM is 22.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Silfab SIL-520 QM use vs Silfab SIL-530 XM?
Silfab SIL-520 QM uses N-type cells; Silfab SIL-530 XM 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-520 QM and Silfab SIL-530 XM?
Silfab SIL-520 QM has a 30 years power warranty; Silfab SIL-530 XM 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-520 QM and Silfab SIL-530 XM bifacial panels?
Silfab SIL-530 XM is bifacial (captures light from both faces); Silfab SIL-520 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.