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Quartercut Premium DE Series 485W vs Halfcut BC White 490 8 of 18 identical Swap Change panels

Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W vs Solar-Fabrik Mono S4 Halfcut BC White 490

Solar-Fabrik
Mono S4 Quartercut Premium DE Series 485W
485 Wp 24.27 % TOPCon Bifacial Incomplete
Open panel page Datasheet PDF
VS
Solar-Fabrik Mono S4 Halfcut BC White 490
Solar-Fabrik
Mono S4 Halfcut BC White 490
490 Wp 24.00 % Back Contact Bifacial Incomplete
Open panel page Datasheet PDF
The verdict

Quartercut Premium DE Series 485W leads on the differences that matter

The largest is open-circuit voltage: 3.67 V apart. 8 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 10 differences
How alike are they
8 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

10 of 18 parameters
Parameter Quartercut Premium DE Series 485W Halfcut BC White 490 Difference
Open-circuit voltage 37.08 V 40.75 V 3.67 V apart
Module efficiency 24.27 % 24.00 % 0.27 pp more efficient
Cell technology TOPCon Back Contact TOPCon vs Back Contact
Module area 1.998 m² 2.041 m² 0.043 m² apart
Cell count 192 108 84 cells apart
Short-circuit current 16.03 A 15.18 A 0.85 A apart
Weight 24.0 kg 25.0 kg 1.0 kg lighter
Voltage at max power 31.29 V 33.72 V 2.43 V apart
Dimensions 1762x1134x30 mm 1800x1134x30 mm 1762x1134x30 mm vs 1800x1134x30 mm
Current at max power 15.50 A 14.53 A 0.97 A apart
02

What it means on a roof

Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
Quartercut Premium DE Series 485W
16,273 kWh
Halfcut BC White 490
16,440 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario Quartercut Premium DE Series 485W Halfcut BC White 490
Standard test conditions 25 °C 100.0% of rated power 485 W 490 W
Cool, bright day 40 °C 96.1% of rated power 466 W 471 W
Typical summer roof 55 °C 92.2% of rated power 447 W 452 W
Hot roof 70 °C 88.3% of rated power 428 W 433 W
03

Full specification

Parameter Quartercut Premium DE Series 485W Halfcut BC White 490 Difference
Power and efficiency
Rated power 485 Wp 490 Wp Effectively the same
Module efficiency 24.27 % 24.00 % +0.27 pp for Quartercut Premium DE Series 485W
Power density 242.7 Wp/m² 240.1 Wp/m² Effectively the same
Open-circuit voltage 37.08 V 40.75 V 3.67 V apart
Voltage at max power 31.29 V 33.72 V 2.43 V apart
Short-circuit current 16.03 A 15.18 A 0.85 A apart
Current at max power 15.50 A 14.53 A 0.97 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1800x1134x30 mm 1762x1134x30 mm vs 1800x1134x30 mm
Module area 1.998 m² 2.041 m² 0.043 m² apart
Weight 24.0 kg 25.0 kg -1.0 kg for Quartercut Premium DE Series 485W
Weight per kWp 49.5 kg/kWp 51.0 kg/kWp Effectively the same
Warranty and degradation
Product warranty 30 yrs 30 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation - - Neither datasheet publishes this
Technology
Cell technology TOPCon Back Contact TOPCon vs Back Contact
Cell type Monocrystalline Monocrystalline Same
Cell count 192 108 84 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#164 vs #303
Quartercut Premium DE Series 485W leads by 139 places
Power density
#140 vs #313
Quartercut Premium DE Series 485W leads by 173 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#3,021 vs #4,360
Quartercut Premium DE Series 485W leads by 1,339 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,094 vs #2,188
Quartercut Premium DE Series 485W leads by 94 places
05

More useful comparisons

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Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W vs Solar-Fabrik Mono S4 Quartercut Premium DE Series 480W
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Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W vs Solar-Fabrik Mono S4 Quartercut Premium DE Series 475W
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Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik Mono S4 Halfcut BC Series White 490W
The same specification on paper
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Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik Mono S4 Halfcut BC White 485
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Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik Mono S4 Halfcut BC White 480-490W
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Solar-Fabrik Mono S4 Halfcut BC White 490 vs Solar-Fabrik Mono S4 Halfcut BC Series White 485W
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W or Solar-Fabrik Mono S4 Halfcut BC White 490?
According to our database: Solar-Fabrik Mono S4 Quartercut Premium DE Series 485 W has higher module efficiency (24.27% vs 24.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W and Solar-Fabrik Mono S4 Halfcut BC White 490?
Solar-Fabrik Mono S4 Quartercut Premium DE Series 485 W has a module efficiency of 24.27%, while Solar-Fabrik Mono S4 Halfcut BC White 490 is 24.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W use vs Solar-Fabrik Mono S4 Halfcut BC White 490?
Solar-Fabrik Mono S4 Quartercut Premium DE Series 485 W uses TOPCon cells; Solar-Fabrik Mono S4 Halfcut BC White 490 uses Back Contact. 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 Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W and Solar-Fabrik Mono S4 Halfcut BC White 490?
Solar-Fabrik Mono S4 Quartercut Premium DE Series 485 W has a 30 years power warranty; Solar-Fabrik Mono S4 Halfcut BC White 490 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 Solar-Fabrik Mono S4 Quartercut Premium DE Series 485W and Solar-Fabrik Mono S4 Halfcut BC White 490 bifacial panels?
Both Solar-Fabrik Mono S4 Quartercut Premium DE Series 485 W and Solar-Fabrik Mono S4 Halfcut BC White 490 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.

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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.