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445W vs 450W 18 of 19 identical Swap Change panels

GCL NT12R/48GDF-445W vs GCL NT12R/48GDF-450W

NT12R/48GDF-445W
445 Wp 22.27 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
NT12R/48GDF-450W
450 Wp 22.52 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

450W leads on the differences that matter

The largest is module efficiency: 0.25 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
01

What actually differs

1 of 19 parameters
Parameter 445W 450W Difference
Module efficiency 22.27 % 22.52 % 0.25 pp more efficient
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.
445W
14,931 kWh
450W
15,098 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 445W 450W
Standard test conditions 25 °C 100.0% of rated power 445 W 450 W
Cool, bright day 40 °C 95.7% of rated power 426 W 430 W
Typical summer roof 55 °C 91.3% of rated power 406 W 411 W
Hot roof 70 °C 87.0% of rated power 387 W 391 W
03

Full specification

Parameter 445W 450W Difference
Power and efficiency
Rated power 445 Wp 450 Wp Effectively the same
Module efficiency 22.27 % 22.52 % +0.25 pp for 450W
Power density 222.7 Wp/m² 225.2 Wp/m² Effectively the same
Open-circuit voltage 34.80 V 35.05 V Effectively the same
Voltage at max power 29.48 V 29.71 V Effectively the same
Short-circuit current 15.90 A 15.95 A Effectively the same
Current at max power 15.10 A 15.15 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1762x1134x30 mm Same
Module area 1.998 m² 1.998 m² Same
Weight 24.5 kg 24.5 kg Same
Weight per kWp 55.1 kg/kWp 54.4 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 96 96 Same
Bifacial Yes Yes Same
04

Against the whole database

14,129 panels
Efficiency
#5,544 vs #4,167
450W leads by 1,377 places
Power density
#5,365 vs #4,284
450W leads by 1,081 places
Heat behaviour
#2,220 vs #2,220
Tied - the same position in the database
Weight
#9,519 vs #8,835
450W leads by 684 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#9,540 vs #9,139
450W leads by 401 places
05

More useful comparisons

Open the full database
Same series, other bin
GCL NT12R/48GDF-445W vs GCL GCL-NT12R/54GDF-530
10 differences, the largest is module efficiency
Same series, other bin
GCL NT12R/48GDF-445W vs GCL NT12R/54GDF-525W
10 differences, the largest is module efficiency
Same series, other bin
GCL NT12R/48GDF-445W vs GCL GCL-NT12R/54GDF-525
10 differences, the largest is module efficiency
Same series, other bin
GCL NT12R/48GDF-445W vs GCL NT12R/54BGDF-520W
10 differences, the largest is module efficiency
Same series, other bin
GCL NT12R/48GDF-445W vs GCL NT12R/54GDF-520W
10 differences, the largest is module efficiency
Same series, other bin
GCL NT12R/48GDF-445W vs GCL GCL-NT12R/54GDF-520
10 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: GCL NT12R/48GDF-445W or GCL NT12R/48GDF-450W?
According to our database: GCL NT12R/48GDF-450 W has higher module efficiency (22.52% 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/48GDF-445W and GCL NT12R/48GDF-450W?
GCL NT12R/48GDF-445 W has a module efficiency of 22.27%, while GCL NT12R/48GDF-450 W is 22.52%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does GCL NT12R/48GDF-445W use vs GCL NT12R/48GDF-450W?
GCL NT12R/48GDF-445 W uses TOPCon cells; GCL NT12R/48GDF-450 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/48GDF-445W and GCL NT12R/48GDF-450W?
GCL NT12R/48GDF-445 W has a 30 years power warranty; GCL NT12R/48GDF-450 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/48GDF-445W and GCL NT12R/48GDF-450W bifacial panels?
Both GCL NT12R/48GDF-445 W and GCL NT12R/48GDF-450 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.

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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.