525W vs 520W 18 of 19 identical Swap Change panels

GCL NT12R/54GDF-525W vs GCL NT12R/54GDF-520W

Q: Which panel is better: GCL NT12R/54GDF-525W or GCL NT12R/54GDF-520W?

According to our database: GCL NT12R/54GDF-525W has higher module efficiency (23.60% vs 23.37%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of GCL NT12R/54GDF-525W and GCL NT12R/54GDF-520W?

GCL NT12R/54GDF-525W has a module efficiency of 23.60%, while GCL NT12R/54GDF-520W is 23.37%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does GCL NT12R/54GDF-525W use vs GCL NT12R/54GDF-520W?

GCL NT12R/54GDF-525W uses TOPCon cells; GCL NT12R/54GDF-520W 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/54GDF-525W and GCL NT12R/54GDF-520W?

GCL NT12R/54GDF-525W has a 30 years power warranty; GCL NT12R/54GDF-520W 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/54GDF-525W and GCL NT12R/54GDF-520W bifacial panels?

Both GCL NT12R/54GDF-525W and GCL NT12R/54GDF-520W 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/54GDF-525W

525 Wp 23.60 % TOPCon Bifacial

Open panel page Datasheet PDF

NT12R/54GDF-520W

520 Wp 23.37 % TOPCon Bifacial

Open panel page Datasheet PDF

The verdict

525W leads on the differences that matter

The largest is module efficiency: 0.23 pp more efficient. 18 of 19 comparable parameters are identical.

See the one difference

How alike are they

18 of 19 comparable
parameters are identical

identical differs

What actually differs

1 of 19 parameters

Parameter 525W 520W Difference

Module efficiency 23.60 % 23.37 % 0.23 pp more efficient

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, 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.

525W

17,615 kWh

520W

17,447 kWh

Lifetime gap

168 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 525W 520W

Standard test conditions 25 °C 100.0% of rated power 525 W 520 W

Cool, bright day 40 °C 95.7% of rated power 502 W 497 W

Typical summer roof 55 °C 91.3% of rated power 479 W 475 W

Hot roof 70 °C 87.0% of rated power 456 W 452 W

Full specification

Parameter 525W 520W Difference

Power and efficiency

Rated power 525 Wp 520 Wp Effectively the same

Module efficiency 23.60 % 23.37 % +0.23 pp for 525W

Power density 236.0 Wp/m² 233.7 Wp/m² Effectively the same

Open-circuit voltage 40.30 V 40.05 V Effectively the same

Voltage at max power 34.20 V 33.99 V Effectively the same

Short-circuit current 16.16 A 16.11 A Effectively the same

Current at max power 15.35 A 15.30 A Effectively the same

Temperature

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

Mechanical

Dimensions 1962x1134x30 mm 1962x1134x30 mm Same

Module area 2.225 m² 2.225 m² Same

Weight 27.3 kg 27.3 kg Same

Weight per kWp 52.0 kg/kWp 52.5 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 108 108 Same

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#627 vs #930

525W leads by 303 places

Power density

#653 vs #919

525W leads by 266 places

Heat behaviour

#2,165 vs #2,165

Tied - the same position in the database

Weight

#5,417 vs #6,043

525W leads by 626 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#5,035 vs #5,503

525W leads by 468 places

More useful comparisons

Open the full database

Same series, other bin

GCL NT12R/54GDF-525W vs GCL GCL-NT12R/54GDF-530

One difference: module efficiency

Same series, other bin

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

The same specification on paper

Same series, other bin

GCL NT12R/54GDF-525W vs GCL NT12R/54BGDF-520W

4 differences, the largest is module efficiency

Same series, other bin

GCL NT12R/54GDF-525W vs GCL GCL-NT12R/54GDF-520

One difference: module efficiency

Same series, other bin

GCL NT12R/54GDF-525W vs GCL NT12R/54BGDF-515W

5 differences, the largest is module efficiency

Same series, other bin

GCL NT12R/54GDF-525W vs GCL NT12R/54GDF-515W

3 differences, the largest is module efficiency

Written summary

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Questions about this pairing

Which panel is better: GCL NT12R/54GDF-525W or GCL NT12R/54GDF-520W?

According to our database: GCL NT12R/54GDF-525 W has higher module efficiency (23.60% vs 23.37%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of GCL NT12R/54GDF-525W and GCL NT12R/54GDF-520W?

GCL NT12R/54GDF-525 W has a module efficiency of 23.60%, while GCL NT12R/54GDF-520 W is 23.37%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does GCL NT12R/54GDF-525W use vs GCL NT12R/54GDF-520W?

GCL NT12R/54GDF-525 W uses TOPCon cells; GCL NT12R/54GDF-520 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/54GDF-525W and GCL NT12R/54GDF-520W?

GCL NT12R/54GDF-525 W has a 30 years power warranty; GCL NT12R/54GDF-520 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/54GDF-525W and GCL NT12R/54GDF-520W bifacial panels?

Both GCL NT12R/54GDF-525 W and GCL NT12R/54GDF-520 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 5 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.