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475-BTB-BG vs 490-BTB-BG 14 of 19 identical Swap Change panels

Seraphim SEG-475-BTB-BG vs Seraphim SEG-490-BTB-BG

SEG-475-BTB-BG
475 Wp 21.94 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
SEG-490-BTB-BG
490 Wp 22.63 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

490-BTB-BG leads on the differences that matter

The largest is module efficiency: 0.69 pp more efficient. 14 of 19 comparable parameters are identical.

See all 5 differences
How alike are they
14 of 19 comparable
parameters are identical
identical differs
01

What actually differs

5 of 19 parameters
Parameter 475-BTB-BG 490-BTB-BG Difference
Module efficiency 21.94 % 22.63 % 0.69 pp more efficient
Power density 219.4 Wp/m² 226.3 Wp/m² 6.9 Wp/m² higher
Rated power 475 Wp 490 Wp 15 W more power
Cell technology TOPCon N-type TOPCon vs N-type
Annual degradation 0.40 %/yr 0.34 %/yr 0.06 %/yr slower
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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
475-BTB-BG
15,664 kWh
490-BTB-BG
16,475 kWh
Lifetime gap
811 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 475-BTB-BG 490-BTB-BG
Standard test conditions 25 °C 100.0% of rated power 475 W 490 W
Cool, bright day 40 °C 95.5% of rated power 454 W 468 W
Typical summer roof 55 °C 91.0% of rated power 432 W 446 W
Hot roof 70 °C 86.5% of rated power 411 W 424 W
03

Full specification

Parameter 475-BTB-BG 490-BTB-BG Difference
Power and efficiency
Rated power 475 Wp 490 Wp +15 W for 490-BTB-BG
Module efficiency 21.94 % 22.63 % +0.69 pp for 490-BTB-BG
Power density 219.4 Wp/m² 226.3 Wp/m² +6.9 Wp/m² for 490-BTB-BG
Open-circuit voltage 43.00 V 43.60 V Effectively the same
Voltage at max power 35.80 V 36.40 V Effectively the same
Short-circuit current 13.94 A 14.14 A Effectively the same
Current at max power 13.27 A 13.46 A Effectively the same
Temperature
Temperature coefficient -0.300 %/°C -0.300 %/°C Same
Mechanical
Dimensions 1909x1134x30 mm 1909x1134x30 mm Same
Module area 2.165 m² 2.165 m² Same
Weight 27.3 kg 27.3 kg Same
Weight per kWp 57.5 kg/kWp 55.7 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.34 %/yr -0.06 %/yr for 490-BTB-BG
Technology
Cell technology TOPCon N-type TOPCon vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 120 120 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#6,751 vs #3,622
490-BTB-BG leads by 3,129 places
Power density
#6,709 vs #3,660
490-BTB-BG leads by 3,049 places
Heat behaviour
#6,093 vs #6,093
Tied - the same position in the database
Weight
#11,245 vs #10,113
490-BTB-BG leads by 1,132 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,336 vs #6,850
490-BTB-BG leads by 1,486 places
05

More useful comparisons

Open the full database
Same series, other bin
Seraphim SEG-475-BTB-BG vs Seraphim SEG-495-BTB-BG
6 differences, the largest is module efficiency
Same series, other bin
Seraphim SEG-475-BTB-BG vs Seraphim SEG-485-BTB-BG
5 differences, the largest is module efficiency
Same series, other bin
Seraphim SEG-475-BTB-BG vs Seraphim SEG-480-BTB-BG
3 differences, the largest is module efficiency
Same series, other bin
Seraphim SEG-475-BTB-BG vs Seraphim SEG-470-BTB-BG
One difference: module efficiency
Same series, other bin
Seraphim SEG-475-BTB-BG vs Seraphim SEG-465-BTB-BG
3 differences, the largest is module efficiency
Same manufacturer
Seraphim SEG-475-BTB-BG vs Seraphim SRP-730-BHC-BG
15 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Seraphim SEG-475-BTB-BG or Seraphim SEG-490-BTB-BG?
According to our database: Seraphim SEG-490-BTB-BG has higher module efficiency (22.63% vs 21.94%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Seraphim SEG-475-BTB-BG and Seraphim SEG-490-BTB-BG?
Seraphim SEG-475-BTB-BG has a module efficiency of 21.94%, while Seraphim SEG-490-BTB-BG is 22.63%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Seraphim SEG-475-BTB-BG use vs Seraphim SEG-490-BTB-BG?
Seraphim SEG-475-BTB-BG uses TOPCon cells; Seraphim SEG-490-BTB-BG 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 Seraphim SEG-475-BTB-BG and Seraphim SEG-490-BTB-BG?
Seraphim SEG-475-BTB-BG has a 30 years power warranty; Seraphim SEG-490-BTB-BG 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 Seraphim SEG-475-BTB-BG and Seraphim SEG-490-BTB-BG bifacial panels?
Both Seraphim SEG-475-BTB-BG and Seraphim SEG-490-BTB-BG 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.

Shop prices: See 4 Seraphim 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.