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48GDF vs 48BGDF-435 10 of 19 identical Swap Change panels

GCL GCL-NT12R/48GDF vs GCL GCL-NT12R/48BGDF-435

GCL-NT12R/48GDF
475 Wp 23.77 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
GCL-NT12R/48BGDF-435
435 Wp 21.77 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

48GDF leads on the differences that matter

The largest is module efficiency: 2.00 pp more efficient. 10 of 19 comparable parameters are identical.

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

What actually differs

9 of 19 parameters
Parameter 48GDF 48BGDF-435 Difference
Module efficiency 23.77 % 21.77 % 2.00 pp more efficient
Rated power 475 Wp 435 Wp 40 W more power
Power density 237.7 Wp/m² 217.7 Wp/m² 20.0 Wp/m² higher
Weight 24.5 kg 21.5 kg 3.0 kg lighter
Weight per kWp 51.6 kg/kWp 49.4 kg/kWp 2.2 kg/kWp lighter
Short-circuit current 16.23 A 15.46 A 0.77 A apart
Open-circuit voltage 36.30 V 35.08 V 1.22 V apart
Current at max power 15.45 A 14.72 A 0.73 A apart
Voltage at max power 30.75 V 29.55 V 1.20 V apart
02

What it means on a roof

Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, 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.
48GDF
15,937 kWh
48BGDF-435
14,595 kWh
Lifetime gap
1,342 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 48GDF 48BGDF-435
Standard test conditions 25 °C 100.0% of rated power 475 W 435 W
Cool, bright day 40 °C 95.7% of rated power 454 W 416 W
Typical summer roof 55 °C 91.3% of rated power 434 W 397 W
Hot roof 70 °C 87.0% of rated power 413 W 378 W
03

Full specification

Parameter 48GDF 48BGDF-435 Difference
Power and efficiency
Rated power 475 Wp 435 Wp +40 W for 48GDF
Module efficiency 23.77 % 21.77 % +2.00 pp for 48GDF
Power density 237.7 Wp/m² 217.7 Wp/m² +20.0 Wp/m² for 48GDF
Open-circuit voltage 36.30 V 35.08 V 1.22 V apart
Voltage at max power 30.75 V 29.55 V 1.20 V apart
Short-circuit current 16.23 A 15.46 A 0.77 A apart
Current at max power 15.45 A 14.72 A 0.73 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1762x1134x30 mm Same
Module area 1.998 m² 1.998 m² Same
Weight 24.5 kg 21.5 kg -3.0 kg for 48BGDF-435
Weight per kWp 51.6 kg/kWp 49.4 kg/kWp -2.2 kg/kWp for 48BGDF-435
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 96 96 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#499 vs #7,233
48GDF leads by 6,734 places
Power density
#467 vs #7,066
48GDF leads by 6,599 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#4,954 vs #2,936
48BGDF-435 leads by 2,018 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,608 vs #10,072
48GDF leads by 3,464 places
05

More useful comparisons

Open the full database
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GCL GCL-NT12R/48GDF vs GCL GCL-NT12R/54GDF-530
7 differences, the largest is rated power
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GCL GCL-NT12R/48GDF vs GCL NT12R/54GDF-525W
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Same series, other bin
GCL GCL-NT12R/48GDF vs GCL GCL-NT12R/54GDF-525
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Same series, other bin
GCL GCL-NT12R/48GDF vs GCL NT12R/54BGDF-520W
11 differences, the largest is rated power
Same series, other bin
GCL GCL-NT12R/48GDF vs GCL NT12R/54GDF-520W
9 differences, the largest is rated power
Same series, other bin
GCL GCL-NT12R/48GDF vs GCL GCL-NT12R/54GDF-520
9 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: GCL GCL-NT12R/48GDF or GCL GCL-NT12R/48BGDF-435?
According to our database: GCL GCL-NT12R/48GDF has higher module efficiency (23.77% vs 21.77%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of GCL GCL-NT12R/48GDF and GCL GCL-NT12R/48BGDF-435?
GCL GCL-NT12R/48GDF has a module efficiency of 23.77%, while GCL GCL-NT12R/48BGDF-435 is 21.77%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does GCL GCL-NT12R/48GDF use vs GCL GCL-NT12R/48BGDF-435?
GCL GCL-NT12R/48GDF uses TOPCon cells; GCL GCL-NT12R/48BGDF-435 uses TOPCon. 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 GCL GCL-NT12R/48GDF and GCL GCL-NT12R/48BGDF-435?
GCL GCL-NT12R/48GDF has a 30 years power warranty; GCL GCL-NT12R/48BGDF-435 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 GCL GCL-NT12R/48GDF and GCL GCL-NT12R/48BGDF-435 bifacial panels?
Both GCL GCL-NT12R/48GDF and GCL GCL-NT12R/48BGDF-435 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.