GCL-NT12R/48BGDF-450 vs NT12R/54BGDF-515W 9 of 19 identical Swap Change panels

GCL GCL-NT12R/48BGDF-450 vs GCL NT12R/54BGDF-515W

Q: Which panel is better: GCL GCL-NT12R/48BGDF-450 or GCL NT12R/54BGDF-515W?

According to our database: GCL NT12R/54BGDF-515W has higher module efficiency (23.15% vs 22.52%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of GCL GCL-NT12R/48BGDF-450 and GCL NT12R/54BGDF-515W?

GCL GCL-NT12R/48BGDF-450 has a module efficiency of 22.52%, while GCL NT12R/54BGDF-515W is 23.15%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does GCL GCL-NT12R/48BGDF-450 use vs GCL NT12R/54BGDF-515W?

GCL GCL-NT12R/48BGDF-450 uses TOPCon cells; GCL NT12R/54BGDF-515W 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 GCL-NT12R/48BGDF-450 and GCL NT12R/54BGDF-515W?

GCL GCL-NT12R/48BGDF-450 has a 30 years power warranty; GCL NT12R/54BGDF-515W 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 GCL-NT12R/48BGDF-450 and GCL NT12R/54BGDF-515W bifacial panels?

Both GCL GCL-NT12R/48BGDF-450 and GCL NT12R/54BGDF-515W 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.

GCL-NT12R/48BGDF-450

450 Wp 22.52 % TOPCon Bifacial

Open panel page Datasheet PDF

NT12R/54BGDF-515W

515 Wp 23.15 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

NT12R/54BGDF-515W leads on the differences that matter

The largest is rated power: 65 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 GCL-NT12R/48BGDF-450 NT12R/54BGDF-515W Difference

Rated power 450 Wp 515 Wp 65 W more power

Module efficiency 22.52 % 23.15 % 0.63 pp more efficient

Weight 21.5 kg 27.3 kg 5.8 kg lighter

Power density 225.2 Wp/m² 231.5 Wp/m² 6.3 Wp/m² higher

Open-circuit voltage 35.98 V 41.19 V 5.21 V apart

Module area 1.998 m² 2.225 m² 0.227 m² apart

Weight per kWp 47.8 kg/kWp 53.0 kg/kWp 5.2 kg/kWp lighter

Voltage at max power 30.45 V 34.75 V 4.30 V apart

Cell count 96 108 12 cells apart

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

GCL-NT12R/48BGDF-450

15,098 kWh

NT12R/54BGDF-515W

17,279 kWh

Lifetime gap

2,181 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario GCL-NT12R/48BGDF-450 NT12R/54BGDF-515W

Standard test conditions 25 °C 100.0% of rated power 450 W 515 W

Cool, bright day 40 °C 95.7% of rated power 430 W 493 W

Typical summer roof 55 °C 91.3% of rated power 411 W 470 W

Hot roof 70 °C 87.0% of rated power 391 W 448 W

Full specification

Parameter GCL-NT12R/48BGDF-450 NT12R/54BGDF-515W Difference

Power and efficiency

Rated power 450 Wp 515 Wp +65 W for NT12R/54BGDF-515W

Module efficiency 22.52 % 23.15 % +0.63 pp for NT12R/54BGDF-515W

Power density 225.2 Wp/m² 231.5 Wp/m² +6.3 Wp/m² for NT12R/54BGDF-515W

Open-circuit voltage 35.98 V 41.19 V 5.21 V apart

Voltage at max power 30.45 V 34.75 V 4.30 V apart

Short-circuit current 15.52 A 15.50 A Effectively the same

Current at max power 14.78 A 14.82 A Effectively the same

Temperature

Temperature coefficient -0.290 %/°C -0.290 %/°C Same

Mechanical

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

Module area 1.998 m² 2.225 m² 0.227 m² apart

Weight 21.5 kg 27.3 kg -5.8 kg for GCL-NT12R/48BGDF-450

Weight per kWp 47.8 kg/kWp 53.0 kg/kWp -5.2 kg/kWp for GCL-NT12R/48BGDF-450

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 96 108 12 cells apart

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#4,108 vs #1,503

NT12R/54BGDF-515W leads by 2,605 places

Power density

#4,225 vs #1,499

NT12R/54BGDF-515W leads by 2,726 places

Heat behaviour

#2,165 vs #2,165

Tied - the same position in the database

Weight

#1,891 vs #6,762

GCL-NT12R/48BGDF-450 leads by 4,871 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#8,989 vs #5,886

NT12R/54BGDF-515W leads by 3,103 places

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Written summary

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Questions about this pairing

Which panel is better: GCL GCL-NT12R/48BGDF-450 or GCL NT12R/54BGDF-515W?

According to our database: GCL NT12R/54BGDF-515 W has higher module efficiency (23.15% vs 22.52%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of GCL GCL-NT12R/48BGDF-450 and GCL NT12R/54BGDF-515W?

GCL GCL-NT12R/48BGDF-450 has a module efficiency of 22.52%, while GCL NT12R/54BGDF-515 W is 23.15%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does GCL GCL-NT12R/48BGDF-450 use vs GCL NT12R/54BGDF-515W?

GCL GCL-NT12R/48BGDF-450 uses TOPCon cells; GCL NT12R/54BGDF-515 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 GCL-NT12R/48BGDF-450 and GCL NT12R/54BGDF-515W?

GCL GCL-NT12R/48BGDF-450 has a 30 years power warranty; GCL NT12R/54BGDF-515 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 GCL-NT12R/48BGDF-450 and GCL NT12R/54BGDF-515W bifacial panels?

Both GCL GCL-NT12R/48BGDF-450 and GCL NT12R/54BGDF-515 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.

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.