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NT12R/54GDF-520W vs GCL-NT12R/54GDF-520 19 of 19 identical Swap Change panels

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

NT12R/54GDF-520W
520 Wp 23.37 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
GCL-NT12R/54GDF-520
520 Wp 23.37 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

Identical on every published parameter

All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.

How alike are they
19 of 19 comparable
parameters are identical
identical differs
01

What actually differs

0 of 19 parameters

Every comparable parameter agrees. The full specification is below.

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.
NT12R/54GDF-520W
17,447 kWh
GCL-NT12R/54GDF-520
17,447 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario NT12R/54GDF-520W GCL-NT12R/54GDF-520
Standard test conditions 25 °C 100.0% of rated power 520 W 520 W
Cool, bright day 40 °C 95.7% of rated power 497 W 497 W
Typical summer roof 55 °C 91.3% of rated power 475 W 475 W
Hot roof 70 °C 87.0% of rated power 452 W 452 W
03

Full specification

Parameter NT12R/54GDF-520W GCL-NT12R/54GDF-520 Difference
Power and efficiency
Rated power 520 Wp 520 Wp Same
Module efficiency 23.37 % 23.37 % Same
Power density 233.7 Wp/m² 233.7 Wp/m² Same
Open-circuit voltage 40.05 V 40.05 V Same
Voltage at max power 33.99 V 33.99 V Same
Short-circuit current 16.11 A 16.11 A Same
Current at max power 15.30 A 15.30 A 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 52.5 kg/kWp 52.5 kg/kWp 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
04

Against the whole database

14,005 panels
Efficiency
#930 vs #930
Tied - the same position in the database
Power density
#919 vs #919
Tied - the same position in the database
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#6,043 vs #6,043
Tied - the same position in the database
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#5,503 vs #5,503
Tied - the same position in the database
05

More useful comparisons

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

Written summary

07

Questions about this pairing

Which panel is better: GCL NT12R/54GDF-520W or GCL GCL-NT12R/54GDF-520?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of GCL NT12R/54GDF-520W and GCL GCL-NT12R/54GDF-520?
GCL NT12R/54GDF-520 W has a module efficiency of 23.37%, while GCL GCL-NT12R/54GDF-520 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-520W use vs GCL GCL-NT12R/54GDF-520?
GCL NT12R/54GDF-520 W uses TOPCon cells; GCL GCL-NT12R/54GDF-520 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-520W and GCL GCL-NT12R/54GDF-520?
GCL NT12R/54GDF-520 W has a 30 years power warranty; GCL GCL-NT12R/54GDF-520 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-520W and GCL GCL-NT12R/54GDF-520 bifacial panels?
Both GCL NT12R/54GDF-520 W and GCL GCL-NT12R/54GDF-520 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.