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54BGDF-515W vs 48GDF-455W 9 of 19 identical Swap Change panels

GCL NT12R/54BGDF-515W vs GCL NT12R/48GDF-455W

NT12R/54BGDF-515W
515 Wp 23.15 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
NT12R/48GDF-455W
455 Wp 22.77 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

54BGDF-515W leads on the differences that matter

The largest is rated power: 60 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 54BGDF-515W 48GDF-455W Difference
Rated power 515 Wp 455 Wp 60 W more power
Module efficiency 23.15 % 22.77 % 0.38 pp more efficient
Weight 27.3 kg 24.5 kg 2.8 kg lighter
Open-circuit voltage 41.19 V 35.30 V 5.89 V apart
Module area 2.225 m² 1.998 m² 0.227 m² apart
Power density 231.5 Wp/m² 227.7 Wp/m² 3.8 Wp/m² higher
Voltage at max power 34.75 V 29.94 V 4.81 V apart
Cell count 108 96 12 cells apart
Short-circuit current 15.50 A 16.00 A 0.50 A apart
Dimensions 1962x1134x30 mm 1762x1134x30 mm 1962x1134x30 mm vs 1762x1134x30 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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
54BGDF-515W
17,279 kWh
48GDF-455W
15,266 kWh
Lifetime gap
2,013 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 54BGDF-515W 48GDF-455W
Standard test conditions 25 °C 100.0% of rated power 515 W 455 W
Cool, bright day 40 °C 95.7% of rated power 493 W 435 W
Typical summer roof 55 °C 91.3% of rated power 470 W 415 W
Hot roof 70 °C 87.0% of rated power 448 W 396 W
03

Full specification

Parameter 54BGDF-515W 48GDF-455W Difference
Power and efficiency
Rated power 515 Wp 455 Wp +60 W for 54BGDF-515W
Module efficiency 23.15 % 22.77 % +0.38 pp for 54BGDF-515W
Power density 231.5 Wp/m² 227.7 Wp/m² +3.8 Wp/m² for 54BGDF-515W
Open-circuit voltage 41.19 V 35.30 V 5.89 V apart
Voltage at max power 34.75 V 29.94 V 4.81 V apart
Short-circuit current 15.50 A 16.00 A 0.50 A apart
Current at max power 14.82 A 15.20 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1962x1134x30 mm 1762x1134x30 mm 1962x1134x30 mm vs 1762x1134x30 mm
Module area 2.225 m² 1.998 m² 0.227 m² apart
Weight 27.3 kg 24.5 kg -2.8 kg for 48GDF-455W
Weight per kWp 53.0 kg/kWp 53.8 kg/kWp Effectively the same
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 108 96 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,503 vs #3,073
54BGDF-515W leads by 1,570 places
Power density
#1,499 vs #2,888
54BGDF-515W leads by 1,389 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#6,762 vs #7,897
54BGDF-515W leads by 1,135 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#5,886 vs #8,644
54BGDF-515W leads by 2,758 places
05

More useful comparisons

Open the full database
Same series, other bin
GCL NT12R/54BGDF-515W vs GCL GCL-NT12R/54GDF-530
5 differences, the largest is module efficiency
Same series, other bin
GCL NT12R/54BGDF-515W vs GCL NT12R/54GDF-525W
5 differences, the largest is module efficiency
Same series, other bin
GCL NT12R/54BGDF-515W vs GCL GCL-NT12R/54GDF-525
5 differences, the largest is module efficiency
Same series, other bin
GCL NT12R/54BGDF-515W vs GCL NT12R/54BGDF-520W
One difference: module efficiency
Same series, other bin
GCL NT12R/54BGDF-515W vs GCL NT12R/54GDF-520W
3 differences, the largest is module efficiency
Same series, other bin
GCL NT12R/54BGDF-515W vs GCL GCL-NT12R/54GDF-520
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: GCL NT12R/54BGDF-515W or GCL NT12R/48GDF-455W?
According to our database: GCL NT12R/54BGDF-515 W has higher module efficiency (23.15% vs 22.77%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of GCL NT12R/54BGDF-515W and GCL NT12R/48GDF-455W?
GCL NT12R/54BGDF-515 W has a module efficiency of 23.15%, while GCL NT12R/48GDF-455 W is 22.77%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does GCL NT12R/54BGDF-515W use vs GCL NT12R/48GDF-455W?
GCL NT12R/54BGDF-515 W uses TOPCon cells; GCL NT12R/48GDF-455 W 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 NT12R/54BGDF-515W and GCL NT12R/48GDF-455W?
GCL NT12R/54BGDF-515 W has a 30 years power warranty; GCL NT12R/48GDF-455 W 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 NT12R/54BGDF-515W and GCL NT12R/48GDF-455W bifacial panels?
Both GCL NT12R/54BGDF-515 W and GCL NT12R/48GDF-455 W 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.