GCL-NT12R/48BGDF-435 vs NT12R/54BGDF-510W 9 of 19 identical Swap Change panels

GCL GCL-NT12R/48BGDF-435 vs GCL NT12R/54BGDF-510W

Q: Which panel is better: GCL GCL-NT12R/48BGDF-435 or GCL NT12R/54BGDF-510W?

According to our database: GCL NT12R/54BGDF-510W has higher module efficiency (22.92% vs 21.77%). 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-435 and GCL NT12R/54BGDF-510W?

GCL GCL-NT12R/48BGDF-435 has a module efficiency of 21.77%, while GCL NT12R/54BGDF-510W is 22.92%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does GCL GCL-NT12R/48BGDF-435 use vs GCL NT12R/54BGDF-510W?

GCL GCL-NT12R/48BGDF-435 uses TOPCon cells; GCL NT12R/54BGDF-510W 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-435 and GCL NT12R/54BGDF-510W?

GCL GCL-NT12R/48BGDF-435 has a 30 years power warranty; GCL NT12R/54BGDF-510W 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-435 and GCL NT12R/54BGDF-510W bifacial panels?

Both GCL GCL-NT12R/48BGDF-435 and GCL NT12R/54BGDF-510W 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-435

435 Wp 21.77 % TOPCon Bifacial

Open panel page Datasheet PDF

NT12R/54BGDF-510W

510 Wp 22.92 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

NT12R/54BGDF-510W leads on the differences that matter

The largest is module efficiency: 1.15 pp more efficient. 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-435 NT12R/54BGDF-510W Difference

Module efficiency 21.77 % 22.92 % 1.15 pp more efficient

Rated power 435 Wp 510 Wp 75 W more power

Power density 217.7 Wp/m² 229.2 Wp/m² 11.5 Wp/m² higher

Weight 21.5 kg 27.3 kg 5.8 kg lighter

Open-circuit voltage 35.08 V 40.90 V 5.82 V apart

Module area 1.998 m² 2.225 m² 0.227 m² apart

Weight per kWp 49.4 kg/kWp 53.5 kg/kWp 4.1 kg/kWp lighter

Voltage at max power 29.55 V 34.49 V 4.94 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-435

14,595 kWh

NT12R/54BGDF-510W

17,112 kWh

Lifetime gap

2,517 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario GCL-NT12R/48BGDF-435 NT12R/54BGDF-510W

Standard test conditions 25 °C 100.0% of rated power 435 W 510 W

Cool, bright day 40 °C 95.7% of rated power 416 W 488 W

Typical summer roof 55 °C 91.3% of rated power 397 W 466 W

Hot roof 70 °C 87.0% of rated power 378 W 443 W

Full specification

Parameter GCL-NT12R/48BGDF-435 NT12R/54BGDF-510W Difference

Power and efficiency

Rated power 435 Wp 510 Wp +75 W for NT12R/54BGDF-510W

Module efficiency 21.77 % 22.92 % +1.15 pp for NT12R/54BGDF-510W

Power density 217.7 Wp/m² 229.2 Wp/m² +11.5 Wp/m² for NT12R/54BGDF-510W

Open-circuit voltage 35.08 V 40.90 V 5.82 V apart

Voltage at max power 29.55 V 34.49 V 4.94 V apart

Short-circuit current 15.46 A 15.47 A Effectively the same

Current at max power 14.72 A 14.79 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-435

Weight per kWp 49.4 kg/kWp 53.5 kg/kWp -4.1 kg/kWp for GCL-NT12R/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 96 108 12 cells apart

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#7,233 vs #2,350

NT12R/54BGDF-510W leads by 4,883 places

Power density

#7,066 vs #2,369

NT12R/54BGDF-510W leads by 4,697 places

Heat behaviour

#2,165 vs #2,165

Tied - the same position in the database

Weight

#2,936 vs #7,509

GCL-NT12R/48BGDF-435 leads by 4,573 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#10,072 vs #6,391

NT12R/54BGDF-510W leads by 3,681 places

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Written summary

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Questions about this pairing

Which panel is better: GCL GCL-NT12R/48BGDF-435 or GCL NT12R/54BGDF-510W?

According to our database: GCL NT12R/54BGDF-510 W has higher module efficiency (22.92% 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/48BGDF-435 and GCL NT12R/54BGDF-510W?

GCL GCL-NT12R/48BGDF-435 has a module efficiency of 21.77%, while GCL NT12R/54BGDF-510 W is 22.92%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does GCL GCL-NT12R/48BGDF-435 use vs GCL NT12R/54BGDF-510W?

GCL GCL-NT12R/48BGDF-435 uses TOPCon cells; GCL NT12R/54BGDF-510 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-435 and GCL NT12R/54BGDF-510W?

GCL GCL-NT12R/48BGDF-435 has a 30 years power warranty; GCL NT12R/54BGDF-510 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-435 and GCL NT12R/54BGDF-510W bifacial panels?

Both GCL GCL-NT12R/48BGDF-435 and GCL NT12R/54BGDF-510 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.