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410-BG vs 370 BK 9 of 19 identical Swap Change panels

Silfab SIL-410-BG vs Silfab SIL-370 BK

Silfab
SIL-410-BG
410 Wp 21.40 % PERC
Open panel page Datasheet PDF
VS
Silfab
SIL-370 BK
370 Wp 20.80 % PERC
Open panel page Datasheet PDF
The verdict

410-BG leads on the differences that matter

The largest is rated power: 40 W more power. 9 of 19 comparable parameters are identical.

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

What actually differs

10 of 19 parameters
Parameter 410-BG 370 BK Difference
Rated power 410 Wp 370 Wp 40 W more power
Annual degradation 0.31 %/yr 0.50 %/yr 0.19 %/yr slower
Module efficiency 21.40 % 20.80 % 0.60 pp more efficient
Module area 1.918 m² 1.777 m² 0.141 m² apart
Power density 213.8 Wp/m² 208.2 Wp/m² 5.5 Wp/m² higher
Weight 20.8 kg 19.0 kg 1.8 kg lighter
Short-circuit current 11.30 A 10.33 A 0.97 A apart
Open-circuit voltage 45.92 V 44.76 V 1.16 V apart
Current at max power 10.77 A 9.69 A 1.08 A apart
Dimensions 1864x1029x35 mm 1795x990x38 mm 1864x1029x35 mm vs 1795x990x38 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 (-0.377 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
410-BG
13,801 kWh
370 BK
11,968 kWh
Lifetime gap
1,833 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 410-BG 370 BK
Standard test conditions 25 °C 100.0% of rated power 410 W 370 W
Cool, bright day 40 °C 94.3% of rated power 387 W 349 W
Typical summer roof 55 °C 88.7% of rated power 364 W 328 W
Hot roof 70 °C 83.0% of rated power 340 W 307 W
03

Full specification

Parameter 410-BG 370 BK Difference
Power and efficiency
Rated power 410 Wp 370 Wp +40 W for 410-BG
Module efficiency 21.40 % 20.80 % +0.60 pp for 410-BG
Power density 213.8 Wp/m² 208.2 Wp/m² +5.5 Wp/m² for 410-BG
Open-circuit voltage 45.92 V 44.76 V 1.16 V apart
Voltage at max power 38.08 V 38.34 V Effectively the same
Short-circuit current 11.30 A 10.33 A 0.97 A apart
Current at max power 10.77 A 9.69 A 1.08 A apart
Temperature
Temperature coefficient -0.377 %/°C -0.377 %/°C Same
Mechanical
Dimensions 1864x1029x35 mm 1795x990x38 mm 1864x1029x35 mm vs 1795x990x38 mm
Module area 1.918 m² 1.777 m² 0.141 m² apart
Weight 20.8 kg 19.0 kg -1.8 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 0.31 %/yr 0.50 %/yr -0.19 %/yr for 410-BG
Technology
Cell technology PERC PERC Same
Cell type Monocrystalline Monocrystalline Same
Cell count 66 66 Same
Bifacial No No Same
04

Against the whole database

14,129 panels
Efficiency
#8,388 vs #10,533
410-BG leads by 2,145 places
Power density
#8,468 vs #10,528
410-BG leads by 2,060 places
Heat behaviour
#13,470 vs #13,470
Tied - the same position in the database
Weight
#4,154 vs #4,742
410-BG leads by 588 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#9,073 vs #10,529
410-BG leads by 1,456 places
05

More useful comparisons

Open the full database
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Silfab SIL-410-BG vs Silfab SIL-420-BG
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Silfab SIL-410-BG vs Silfab SIL-380 BK
7 differences, the largest is annual degradation
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Silfab SIL-410-BG vs Silfab SIL-640 XL
15 differences, the largest is module efficiency
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Silfab SIL-410-BG vs Silfab SIL-630 XL
15 differences, the largest is module efficiency
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Silfab SIL-410-BG vs Silfab SIL-620 XL
15 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Silfab SIL-410-BG or Silfab SIL-370 BK?
According to our database: Silfab SIL-410-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-410-BG and Silfab SIL-370 BK?
Silfab SIL-410-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-410-BG use vs Silfab SIL-370 BK?
Silfab SIL-410-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-410-BG and Silfab SIL-370 BK?
Silfab SIL-410-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.