Silfab SIL-430-QD vs Silfab SIL-440 QD
VS
The verdict
440 QD leads on the differences that matter
The largest is module efficiency: 0.50 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
430-QD
440 QD
Difference
Module efficiency
22.10 %
22.60 %
0.50 pp more efficient
Power density
220.5 Wp/m²
225.7 Wp/m²
5.1 Wp/m² higher
Rated power
430 Wp
440 Wp
10 W more power
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.
430-QD
14,497 kWh
440 QD
14,834 kWh
Lifetime gap
337 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
430-QD
440 QD
Standard test conditions
25 °C
100.0% of rated power
430 W
440 W
Cool, bright day
40 °C
95.7% of rated power
411 W
421 W
Typical summer roof
55 °C
91.3% of rated power
393 W
402 W
Hot roof
70 °C
87.0% of rated power
374 W
383 W
03
Full specification
Parameter
430-QD
440 QD
Difference
Power and efficiency
Rated power
430 Wp
440 Wp
+10 W for 440 QD
Module efficiency
22.10 %
22.60 %
+0.50 pp for 440 QD
Power density
220.5 Wp/m²
225.7 Wp/m²
+5.1 Wp/m² for 440 QD
Open-circuit voltage
38.91 V
38.97 V
Effectively the same
Voltage at max power
33.25 V
33.41 V
Effectively the same
Short-circuit current
13.87 A
14.22 A
Effectively the same
Current at max power
12.93 A
13.17 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
1721x1133x35 mm
1721x1133x35 mm
Same
Module area
1.950 m²
1.950 m²
Same
Weight
21.0 kg
21.0 kg
Same
Weight per kWp
48.8 kg/kWp
47.7 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
108
108
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#6,012
vs
#3,658
440 QD leads by 2,354 places
Power density
#6,191
vs
#3,848
440 QD leads by 2,343 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#2,492
vs
#1,829
440 QD leads by 663 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#7,342
vs
#6,331
440 QD leads by 1,011 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-430-QD or Silfab SIL-440 QD?
According to our database: Silfab SIL-440 QD has higher module efficiency (22.60% 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-430-QD and Silfab SIL-440 QD?
Silfab SIL-430-QD has a module efficiency of 22.10%, while Silfab SIL-440 QD is 22.60%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Silfab SIL-430-QD use vs Silfab SIL-440 QD?
Silfab SIL-430-QD uses N-type cells; Silfab SIL-440 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-430-QD and Silfab SIL-440 QD?
Silfab SIL-430-QD has a 30 years power warranty; Silfab SIL-440 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.
Shop prices: See 2 Silfab offers
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.