NT12R/54BGDF-505W vs GCL-NT12R/48BGDF-445 9 of 19 identical Swap Change panels

GCL NT12R/54BGDF-505W vs GCL GCL-NT12R/48BGDF-445

Q: Which panel is better: GCL NT12R/54BGDF-505W or GCL GCL-NT12R/48BGDF-445?

According to our database: GCL NT12R/54BGDF-505W has higher module efficiency (22.70% vs 22.27%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of GCL NT12R/54BGDF-505W and GCL GCL-NT12R/48BGDF-445?

GCL NT12R/54BGDF-505W has a module efficiency of 22.70%, while GCL GCL-NT12R/48BGDF-445 is 22.27%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does GCL NT12R/54BGDF-505W use vs GCL GCL-NT12R/48BGDF-445?

GCL NT12R/54BGDF-505W uses TOPCon cells; GCL GCL-NT12R/48BGDF-445 uses TOPCon. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.

Q: What is the warranty on GCL NT12R/54BGDF-505W and GCL GCL-NT12R/48BGDF-445?

GCL NT12R/54BGDF-505W has a 30 years power warranty; GCL GCL-NT12R/48BGDF-445 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.

Q: Are GCL NT12R/54BGDF-505W and GCL GCL-NT12R/48BGDF-445 bifacial panels?

Both GCL NT12R/54BGDF-505W and GCL GCL-NT12R/48BGDF-445 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.

NT12R/54BGDF-505W

505 Wp 22.70 % TOPCon Bifacial

Open panel page Datasheet PDF

GCL-NT12R/48BGDF-445

445 Wp 22.27 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

NT12R/54BGDF-505W 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

What actually differs

10 of 19 parameters

Parameter NT12R/54BGDF-505W GCL-NT12R/48BGDF-445 Difference

Rated power 505 Wp 445 Wp 60 W more power

Weight 27.3 kg 21.5 kg 5.8 kg lighter

Module efficiency 22.70 % 22.27 % 0.43 pp more efficient

Weight per kWp 54.1 kg/kWp 48.3 kg/kWp 5.7 kg/kWp lighter

Open-circuit voltage 40.61 V 35.68 V 4.93 V apart

Module area 2.225 m² 1.998 m² 0.227 m² apart

Power density 227.0 Wp/m² 222.7 Wp/m² 4.3 Wp/m² higher

Voltage at max power 34.22 V 30.15 V 4.07 V apart

Cell count 108 96 12 cells apart

Dimensions 1962x1134x30 mm 1762x1134x30 mm 1962x1134x30 mm vs 1762x1134x30 mm

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

Cell temperature

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.

NT12R/54BGDF-505W

16,944 kWh

GCL-NT12R/48BGDF-445

14,931 kWh

Lifetime gap

2,013 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario NT12R/54BGDF-505W GCL-NT12R/48BGDF-445

Standard test conditions 25 °C 100.0% of rated power 505 W 445 W

Cool, bright day 40 °C 95.7% of rated power 483 W 426 W

Typical summer roof 55 °C 91.3% of rated power 461 W 406 W

Hot roof 70 °C 87.0% of rated power 439 W 387 W

Full specification

Parameter NT12R/54BGDF-505W GCL-NT12R/48BGDF-445 Difference

Power and efficiency

Rated power 505 Wp 445 Wp +60 W for NT12R/54BGDF-505W

Module efficiency 22.70 % 22.27 % +0.43 pp for NT12R/54BGDF-505W

Power density 227.0 Wp/m² 222.7 Wp/m² +4.3 Wp/m² for NT12R/54BGDF-505W

Open-circuit voltage 40.61 V 35.68 V 4.93 V apart

Voltage at max power 34.22 V 30.15 V 4.07 V apart

Short-circuit current 15.44 A 15.50 A Effectively the same

Current at max power 14.76 A 14.76 A 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 21.5 kg -5.8 kg for GCL-NT12R/48BGDF-445

Weight per kWp 54.1 kg/kWp 48.3 kg/kWp -5.7 kg/kWp for GCL-NT12R/48BGDF-445

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

Against the whole database

14,005 panels

Efficiency

#3,307 vs #5,481

NT12R/54BGDF-505W leads by 2,174 places

Power density

#3,353 vs #5,302

NT12R/54BGDF-505W leads by 1,949 places

Heat behaviour

#2,165 vs #2,165

Tied - the same position in the database

Weight

#8,277 vs #2,192

GCL-NT12R/48BGDF-445 leads by 6,085 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#6,858 vs #9,381

NT12R/54BGDF-505W leads by 2,523 places

More useful comparisons

Open the full database

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GCL NT12R/54BGDF-505W vs GCL GCL-NT12R/54GDF-530

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GCL NT12R/54BGDF-505W vs GCL NT12R/54GDF-525W

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GCL NT12R/54BGDF-505W vs GCL GCL-NT12R/54GDF-525

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Same series, other bin

GCL NT12R/54BGDF-505W vs GCL NT12R/54BGDF-520W

3 differences, the largest is module efficiency

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GCL NT12R/54BGDF-505W vs GCL NT12R/54GDF-520W

5 differences, the largest is module efficiency

Same series, other bin

GCL NT12R/54BGDF-505W vs GCL GCL-NT12R/54GDF-520

5 differences, the largest is module efficiency

Written summary

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Questions about this pairing

Which panel is better: GCL NT12R/54BGDF-505W or GCL GCL-NT12R/48BGDF-445?

According to our database: GCL NT12R/54BGDF-505 W has higher module efficiency (22.70% vs 22.27%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of GCL NT12R/54BGDF-505W and GCL GCL-NT12R/48BGDF-445?

GCL NT12R/54BGDF-505 W has a module efficiency of 22.70%, while GCL GCL-NT12R/48BGDF-445 is 22.27%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does GCL NT12R/54BGDF-505W use vs GCL GCL-NT12R/48BGDF-445?

GCL NT12R/54BGDF-505 W uses TOPCon cells; GCL GCL-NT12R/48BGDF-445 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-505W and GCL GCL-NT12R/48BGDF-445?

GCL NT12R/54BGDF-505 W has a 30 years power warranty; GCL GCL-NT12R/48BGDF-445 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-505W and GCL GCL-NT12R/48BGDF-445 bifacial panels?

Both GCL NT12R/54BGDF-505 W and GCL GCL-NT12R/48BGDF-445 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 6 GCL 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.