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520 XM vs 570 XM+ 10 of 19 identical Swap Change panels

Silfab SIL-520 XM vs Silfab SIL-570 XM+

Silfab
SIL-520 XM
520 Wp 21.90 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Silfab SIL-570 XM+
Silfab
SIL-570 XM+
570 Wp 22.10 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

570 XM+ leads on the differences that matter

The largest is rated power: 50 W more power. 10 of 19 comparable parameters are identical.

See all 9 differences
How alike are they
10 of 19 comparable
parameters are identical
identical differs
01

What actually differs

9 of 19 parameters
Parameter 520 XM 570 XM+ Difference
Rated power 520 Wp 570 Wp 50 W more power
Open-circuit voltage 47.52 V 52.03 V 4.51 V apart
Module area 2.377 m² 2.581 m² 0.204 m² apart
Weight 26.2 kg 28.5 kg 2.3 kg lighter
Module efficiency 21.90 % 22.10 % 0.20 pp more efficient
Cell technology TOPCon N-type TOPCon vs N-type
Cell count 132 144 12 cells apart
Voltage at max power 40.48 V 43.74 V 3.26 V apart
Dimensions 2098x1133x35 mm 2278x1133x35 mm 2098x1133x35 mm vs 2278x1133x35 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.
520 XM
17,531 kWh
570 XM+
19,217 kWh
Lifetime gap
1,686 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 520 XM 570 XM+
Standard test conditions 25 °C 100.0% of rated power 520 W 570 W
Cool, bright day 40 °C 95.7% of rated power 497 W 545 W
Typical summer roof 55 °C 91.3% of rated power 475 W 520 W
Hot roof 70 °C 87.0% of rated power 452 W 496 W
03

Full specification

Parameter 520 XM 570 XM+ Difference
Power and efficiency
Rated power 520 Wp 570 Wp +50 W for 570 XM+
Module efficiency 21.90 % 22.10 % +0.20 pp for 570 XM+
Power density 218.8 Wp/m² 220.8 Wp/m² Effectively the same
Open-circuit voltage 47.52 V 52.03 V 4.51 V apart
Voltage at max power 40.48 V 43.74 V 3.26 V apart
Short-circuit current 13.65 A 13.79 A Effectively the same
Current at max power 12.85 A 13.03 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2098x1133x35 mm 2278x1133x35 mm 2098x1133x35 mm vs 2278x1133x35 mm
Module area 2.377 m² 2.581 m² 0.204 m² apart
Weight 26.2 kg 28.5 kg -2.3 kg for 520 XM
Weight per kWp 50.4 kg/kWp 50.0 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 TOPCon N-type TOPCon vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 132 144 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#6,783 vs #6,012
570 XM+ leads by 771 places
Power density
#6,837 vs #6,015
570 XM+ leads by 822 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#3,761 vs #3,575
570 XM+ leads by 186 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,485 vs #2,566
570 XM+ leads by 1,919 places
05

More useful comparisons

Open the full database
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Silfab SIL-520 XM vs Silfab SIL-590 XM+
11 differences, the largest is module efficiency
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Silfab SIL-520 XM vs Silfab SIL-580-XM+-BIFACIAL
10 differences, the largest is rated power
Same series, other bin
Silfab
Silfab SIL-520 XM vs Silfab SIL-570 XM+ BIFACIAL
9 differences, the largest is rated power
Same series, other bin
Silfab
Silfab SIL-520 XM vs Silfab SIL-530 XM
4 differences, the largest is module efficiency
Same series, other bin
Silfab
Silfab SIL-520 XM vs Silfab SIL-520 QM
3 differences, the largest is cell technology
Same manufacturer
Silfab
Silfab SIL-520 XM vs Silfab SIL-640 XL
11 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Silfab SIL-520 XM or Silfab SIL-570 XM+?
According to our database: Silfab SIL-570 XM+ has higher module efficiency (22.10% 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 XM and Silfab SIL-570 XM+?
Silfab SIL-520 XM has a module efficiency of 21.90%, while Silfab SIL-570 XM+ is 22.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Silfab SIL-520 XM use vs Silfab SIL-570 XM+?
Silfab SIL-520 XM uses TOPCon cells; Silfab SIL-570 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 XM and Silfab SIL-570 XM+?
Silfab SIL-520 XM has a 30 years power warranty; Silfab SIL-570 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 XM and Silfab SIL-570 XM+ bifacial panels?
Both Silfab SIL-520 XM and Silfab SIL-570 XM+ 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.