Silfab SIL-620 XL vs Silfab SIL-430-QD
VS
The verdict
8 differences, and they point both ways
The largest is rated power: 190 W more power. 11 of 19 comparable parameters are identical.
See all 8 differencesHow alike are they
11
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
8 of 19 parameters
What actually differs
Parameter
620 XL
430-QD
Difference
Rated power
620 Wp
430 Wp
190 W more power
Weight
29.5 kg
21.0 kg
8.5 kg lighter
Open-circuit voltage
57.21 V
38.91 V
18.30 V apart
Module area
2.793 m²
1.950 m²
0.843 m² apart
Voltage at max power
48.16 V
33.25 V
14.91 V apart
Cell count
156
108
48 cells apart
Bifacial
Yes
No
Yes vs No
Dimensions
2465x1133x35 mm
1721x1133x35 mm
2465x1133x35 mm vs 1721x1133x35 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.
620 XL
20,903 kWh
430-QD
14,497 kWh
Lifetime gap
6,406 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
620 XL
430-QD
Standard test conditions
25 °C
100.0% of rated power
620 W
430 W
Cool, bright day
40 °C
95.7% of rated power
593 W
411 W
Typical summer roof
55 °C
91.3% of rated power
566 W
393 W
Hot roof
70 °C
87.0% of rated power
539 W
374 W
03
Full specification
Parameter
620 XL
430-QD
Difference
Power and efficiency
Rated power
620 Wp
430 Wp
+190 W for 620 XL
Module efficiency
22.20 %
22.10 %
Effectively the same
Power density
222.0 Wp/m²
220.5 Wp/m²
Effectively the same
Open-circuit voltage
57.21 V
38.91 V
18.30 V apart
Voltage at max power
48.16 V
33.25 V
14.91 V apart
Short-circuit current
13.55 A
13.87 A
Effectively the same
Current at max power
12.87 A
12.93 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2465x1133x35 mm
1721x1133x35 mm
2465x1133x35 mm vs 1721x1133x35 mm
Module area
2.793 m²
1.950 m²
0.843 m² apart
Weight
29.5 kg
21.0 kg
-8.5 kg for 430-QD
Weight per kWp
47.6 kg/kWp
48.8 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
156
108
48 cells apart
Bifacial
Yes
No
Yes vs No
04
14,005 panels
Against the whole database
Efficiency
#5,817
vs
#6,012
620 XL leads by 195 places
Power density
#5,849
vs
#6,191
620 XL leads by 342 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#1,761
vs
#2,492
620 XL leads by 731 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,404
vs
#7,342
620 XL leads by 5,938 places
05
Open the full database
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The same specification on paper
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Silfab SIL-620 XL or Silfab SIL-430-QD?
According to our database: Silfab SIL-620 XL has higher module efficiency (22.20% vs 22.10%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Silfab SIL-620 XL and Silfab SIL-430-QD?
Silfab SIL-620 XL has a module efficiency of 22.20%, while Silfab SIL-430-QD is 22.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Silfab SIL-620 XL use vs Silfab SIL-430-QD?
Silfab SIL-620 XL uses N-type cells; Silfab SIL-430-QD 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-620 XL and Silfab SIL-430-QD?
Silfab SIL-620 XL has a 30 years power warranty; Silfab SIL-430-QD 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-620 XL and Silfab SIL-430-QD bifacial panels?
Silfab SIL-620 XL is bifacial (captures light from both faces); Silfab SIL-430-QD 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.