Silfab SIL-530 XM vs Silfab SIL-640 XL
VS
The verdict
640 XL leads on the differences that matter
The largest is rated power: 110 W more power. 9 of 19 comparable parameters are identical.
See all 10 differencesHow alike are they
9
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
10 of 19 parameters
What actually differs
Parameter
530 XM
640 XL
Difference
Rated power
530 Wp
640 Wp
110 W more power
Module efficiency
22.30 %
22.92 %
0.62 pp more efficient
Weight
26.2 kg
29.5 kg
3.3 kg lighter
Power density
223.0 Wp/m²
229.2 Wp/m²
6.2 Wp/m² higher
Open-circuit voltage
47.74 V
57.76 V
10.02 V apart
Module area
2.377 m²
2.793 m²
0.416 m² apart
Weight per kWp
49.4 kg/kWp
46.1 kg/kWp
3.3 kg/kWp lighter
Voltage at max power
41.05 V
48.78 V
7.73 V apart
Cell count
132
156
24 cells apart
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 XM
17,785 kWh
640 XL
21,577 kWh
Lifetime gap
3,792 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
530 XM
640 XL
Standard test conditions
25 °C
100.0% of rated power
530 W
640 W
Cool, bright day
40 °C
95.7% of rated power
507 W
612 W
Typical summer roof
55 °C
91.3% of rated power
484 W
584 W
Hot roof
70 °C
87.0% of rated power
461 W
556 W
03
Full specification
Parameter
530 XM
640 XL
Difference
Power and efficiency
Rated power
530 Wp
640 Wp
+110 W for 640 XL
Module efficiency
22.30 %
22.92 %
+0.62 pp for 640 XL
Power density
223.0 Wp/m²
229.2 Wp/m²
+6.2 Wp/m² for 640 XL
Open-circuit voltage
47.74 V
57.76 V
10.02 V apart
Voltage at max power
41.05 V
48.78 V
7.73 V apart
Short-circuit current
13.71 A
13.76 A
Effectively the same
Current at max power
12.91 A
13.12 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 XM
Weight per kWp
49.4 kg/kWp
46.1 kg/kWp
-3.3 kg/kWp for 640 XL
Warranty and degradation
Product warranty
25 yrs
25 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.33 %/yr
0.30 %/yr
Effectively the same
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
156
24 cells apart
Bifacial
Yes
Yes
Same
04
14,129 panels
Against the whole database
Efficiency
#5,161
vs
#2,403
640 XL leads by 2,758 places
Power density
#5,156
vs
#2,433
640 XL leads by 2,723 places
Heat behaviour
#2,220
vs
#2,220
Tied - the same position in the database
Weight
#2,964
vs
#1,004
640 XL leads by 1,960 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#3,730
vs
#661
640 XL leads by 3,069 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Silfab SIL-530 XM or Silfab SIL-640 XL?
According to our database: Silfab SIL-640 XL has higher module efficiency (22.92% vs 22.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Silfab SIL-530 XM and Silfab SIL-640 XL?
Silfab SIL-530 XM has a module efficiency of 22.30%, while Silfab SIL-640 XL is 22.92%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Silfab SIL-530 XM use vs Silfab SIL-640 XL?
Silfab SIL-530 XM uses N-type cells; Silfab SIL-640 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 XM and Silfab SIL-640 XL?
Silfab SIL-530 XM has a 30 years power warranty; Silfab SIL-640 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 XM and Silfab SIL-640 XL bifacial panels?
Both Silfab SIL-530 XM and Silfab SIL-640 XL 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.