Silfab SIL-430 BG+ vs Silfab SIL-370 BK
VS
The verdict
430 BG+ leads on the differences that matter
The largest is rated power: 60 W more power. 7 of 19 comparable parameters are identical.
See all 12 differencesHow alike are they
7
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
12 of 19 parameters
What actually differs
Parameter
430 BG+
370 BK
Difference
Rated power
430 Wp
370 Wp
60 W more power
Annual degradation
0.30 %/yr
0.50 %/yr
0.20 %/yr slower
Module efficiency
21.40 %
20.80 %
0.60 pp more efficient
Weight
21.8 kg
19.0 kg
2.8 kg lighter
Module area
2.014 m²
1.777 m²
0.237 m² apart
Power density
213.5 Wp/m²
208.2 Wp/m²
5.3 Wp/m² higher
Open-circuit voltage
47.96 V
44.76 V
3.20 V apart
Short-circuit current
11.33 A
10.33 A
1.00 A apart
Cell count
138
66
72 cells apart
Current at max power
10.80 A
9.69 A
1.11 A apart
Dimensions
1957x1029x35 mm
1795x990x38 mm
1957x1029x35 mm vs 1795x990x38 mm
Voltage at max power
39.83 V
38.34 V
1.49 V apart
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 (-0.377 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
430 BG+
14,497 kWh
370 BK
11,968 kWh
Lifetime gap
2,529 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
430 BG+
370 BK
Standard test conditions
25 °C
100.0% of rated power
430 W
370 W
Cool, bright day
40 °C
94.3% of rated power
406 W
349 W
Typical summer roof
55 °C
88.7% of rated power
381 W
328 W
Hot roof
70 °C
83.0% of rated power
357 W
307 W
03
Full specification
Parameter
430 BG+
370 BK
Difference
Power and efficiency
Rated power
430 Wp
370 Wp
+60 W for 430 BG+
Module efficiency
21.40 %
20.80 %
+0.60 pp for 430 BG+
Power density
213.5 Wp/m²
208.2 Wp/m²
+5.3 Wp/m² for 430 BG+
Open-circuit voltage
47.96 V
44.76 V
3.20 V apart
Voltage at max power
39.83 V
38.34 V
1.49 V apart
Short-circuit current
11.33 A
10.33 A
1.00 A apart
Current at max power
10.80 A
9.69 A
1.11 A apart
Temperature
Temperature coefficient
-0.377 %/°C
-0.377 %/°C
Same
Mechanical
Dimensions
1957x1029x35 mm
1795x990x38 mm
1957x1029x35 mm vs 1795x990x38 mm
Module area
2.014 m²
1.777 m²
0.237 m² apart
Weight
21.8 kg
19.0 kg
-2.8 kg for 370 BK
Weight per kWp
50.7 kg/kWp
51.4 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
25 yrs
25 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.30 %/yr
0.50 %/yr
-0.20 %/yr for 430 BG+
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
138
66
72 cells apart
Bifacial
No
No
Same
04
14,129 panels
Against the whole database
Efficiency
#8,388
vs
#10,533
430 BG+ leads by 2,145 places
Power density
#8,483
vs
#10,528
430 BG+ leads by 2,045 places
Heat behaviour
#13,470
vs
#13,470
Tied - the same position in the database
Weight
#4,136
vs
#4,742
430 BG+ leads by 606 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#8,367
vs
#10,529
430 BG+ leads by 2,162 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 BG+ or Silfab SIL-370 BK?
According to our database: Silfab SIL-430 BG+ has higher module efficiency (21.40% vs 20.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Silfab SIL-430 BG+ and Silfab SIL-370 BK?
Silfab SIL-430 BG+ has a module efficiency of 21.40%, while Silfab SIL-370 BK is 20.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Silfab SIL-430 BG+ use vs Silfab SIL-370 BK?
Silfab SIL-430 BG+ uses PERC cells; Silfab SIL-370 BK uses PERC. 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 BG+ and Silfab SIL-370 BK?
Silfab SIL-430 BG+ has a 30 years power warranty; Silfab SIL-370 BK 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.