GCL GCL-NT12/66GDF-720 vs GCL NT12/66GDF-730
VS
The verdict
NT12/66GDF-730 leads on the differences that matter
The largest is module efficiency: 0.32 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
GCL-NT12/66GDF-720
NT12/66GDF-730
Difference
Module efficiency
23.18 %
23.50 %
0.32 pp more efficient
Power density
231.8 Wp/m²
235.0 Wp/m²
3.2 Wp/m² higher
Rated power
720 Wp
730 Wp
10 W more power
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.
GCL-NT12/66GDF-720
24,157 kWh
NT12/66GDF-730
24,493 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
GCL-NT12/66GDF-720
NT12/66GDF-730
Standard test conditions
25 °C
100.0% of rated power
720 W
730 W
Cool, bright day
40 °C
95.7% of rated power
689 W
698 W
Typical summer roof
55 °C
91.3% of rated power
657 W
666 W
Hot roof
70 °C
87.0% of rated power
626 W
635 W
03
Full specification
Parameter
GCL-NT12/66GDF-720
NT12/66GDF-730
Difference
Power and efficiency
Rated power
720 Wp
730 Wp
+10 W for NT12/66GDF-730
Module efficiency
23.18 %
23.50 %
+0.32 pp for NT12/66GDF-730
Power density
231.8 Wp/m²
235.0 Wp/m²
+3.2 Wp/m² for NT12/66GDF-730
Open-circuit voltage
48.58 V
49.02 V
Effectively the same
Voltage at max power
40.84 V
41.22 V
Effectively the same
Short-circuit current
18.55 A
18.64 A
Effectively the same
Current at max power
17.63 A
17.71 A
Effectively the same
Temperature
Temperature coefficient
-0.290 %/°C
-0.290 %/°C
Same
Mechanical
Dimensions
2384x1303x33 mm
2384x1303x33 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
38.2 kg
38.3 kg
Effectively the same
Weight per kWp
53.1 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
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#1,424
vs
#716
NT12/66GDF-730 leads by 708 places
Power density
#1,347
vs
#800
NT12/66GDF-730 leads by 547 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#6,810
vs
#5,993
NT12/66GDF-730 leads by 817 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#540
vs
#312
NT12/66GDF-730 leads by 228 places
05
Open the full database
More useful comparisons
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GCL GCL-NT12/66GDF-720 vs GCL GCL-NT12/66GDF-730
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The same specification on paper
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06
Written summary
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07
Questions about this pairing
Which panel is better: GCL GCL-NT12/66GDF-720 or GCL NT12/66GDF-730?
According to our database: GCL NT12/66GDF-730 has higher module efficiency (23.50% vs 23.18%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of GCL GCL-NT12/66GDF-720 and GCL NT12/66GDF-730?
GCL GCL-NT12/66GDF-720 has a module efficiency of 23.18%, while GCL NT12/66GDF-730 is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does GCL GCL-NT12/66GDF-720 use vs GCL NT12/66GDF-730?
GCL GCL-NT12/66GDF-720 uses TOPCon cells; GCL NT12/66GDF-730 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-NT12/66GDF-720 and GCL NT12/66GDF-730?
GCL GCL-NT12/66GDF-720 has a 30 years power warranty; GCL NT12/66GDF-730 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-NT12/66GDF-720 and GCL NT12/66GDF-730 bifacial panels?
Both GCL GCL-NT12/66GDF-720 and GCL NT12/66GDF-730 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.