Sharp NB-JD580 vs Sharp GSD8K66H-740WT
VS
The verdict
GSD8K66H-740WT leads on the differences that matter
The largest is module efficiency: 1.37 pp more efficient. 6 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 12 differencesHow alike are they
6
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
12 of 18 parameters
What actually differs
Parameter
NB-JD580
GSD8K66H-740WT
Difference
Module efficiency
22.45 %
23.82 %
1.37 pp more efficient
Temperature coefficient
-0.300 %/°C
-0.260 %/°C
0.040 %/°C better in heat
Rated power
580 Wp
740 Wp
160 W more power
Power density
224.5 Wp/m²
238.2 Wp/m²
13.7 Wp/m² higher
Weight
32.5 kg
39.0 kg
6.5 kg lighter
Short-circuit current
14.03 A
17.76 A
3.73 A apart
Module area
2.583 m²
3.106 m²
0.523 m² apart
Cell technology
TOPCon
HJT
TOPCon vs HJT
Weight per kWp
56.0 kg/kWp
52.7 kg/kWp
3.3 kg/kWp lighter
Current at max power
13.43 A
16.91 A
3.48 A apart
Cell count
144
132
12 cells apart
Dimensions
2278x1134x30 mm
2384x1303x35 mm
2278x1134x30 mm vs 2384x1303x35 mm
02
What it means on a roof
Thirty years of production
A 1.0% first-year loss then 0.40% a year, assumed for both panels, at 1,200 kWh/kWp a year
NB-JD580
19,460 kWh
GSD8K66H-740WT
24,828 kWh
Lifetime gap
5,368 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
NB-JD580
GSD8K66H-740WT
Standard test conditions
25 °C
100.0% of rated power
580 W
740 W
Cool, bright day
40 °C
95.5% of rated power
554 W
711 W
Typical summer roof
55 °C
91.0% of rated power
528 W
682 W
Hot roof
70 °C
86.5% of rated power
502 W
653 W
03
Full specification
Parameter
NB-JD580
GSD8K66H-740WT
Difference
Power and efficiency
Rated power
580 Wp
740 Wp
+160 W for GSD8K66H-740WT
Module efficiency
22.45 %
23.82 %
+1.37 pp for GSD8K66H-740WT
Power density
224.5 Wp/m²
238.2 Wp/m²
+13.7 Wp/m² for GSD8K66H-740WT
Open-circuit voltage
52.55 V
51.70 V
Effectively the same
Voltage at max power
43.19 V
43.80 V
Effectively the same
Short-circuit current
14.03 A
17.76 A
3.73 A apart
Current at max power
13.43 A
16.91 A
3.48 A apart
Temperature
Temperature coefficient
-0.300 %/°C
-0.260 %/°C
+0.040 %/°C for GSD8K66H-740WT
Mechanical
Dimensions
2278x1134x30 mm
2384x1303x35 mm
2278x1134x30 mm vs 2384x1303x35 mm
Module area
2.583 m²
3.106 m²
0.523 m² apart
Weight
32.5 kg
39.0 kg
-6.5 kg for NB-JD580
Weight per kWp
56.0 kg/kWp
52.7 kg/kWp
-3.3 kg/kWp for GSD8K66H-740WT
Warranty and degradation
Product warranty
25 yrs
25 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
-
0.35 %/yr
Not published by Sharp
Technology
Cell technology
TOPCon
HJT
TOPCon vs HJT
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
132
12 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#4,620
vs
#418
GSD8K66H-740WT leads by 4,202 places
Power density
#4,547
vs
#431
GSD8K66H-740WT leads by 4,116 places
Heat behaviour
#6,093
vs
#511
GSD8K66H-740WT leads by 5,582 places
Weight
#10,343
vs
#6,344
GSD8K66H-740WT leads by 3,999 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,056
vs
#12
GSD8K66H-740WT leads by 2,044 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Sharp NB-JD580 or Sharp GSD8K66H-740WT?
According to our database: Sharp GSD8K66H-740WT has higher module efficiency (23.82% vs 22.45%); Sharp GSD8K66H-740WT tolerates heat better (temp coeff -0.260%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Sharp NB-JD580 and Sharp GSD8K66H-740WT?
Sharp NB-JD580 has a module efficiency of 22.45%, while Sharp GSD8K66H-740WT is 23.82%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Sharp NB-JD580 use vs Sharp GSD8K66H-740WT?
Sharp NB-JD580 uses TOPCon cells; Sharp GSD8K66H-740WT uses HJT. 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 Sharp NB-JD580 and Sharp GSD8K66H-740WT?
Sharp NB-JD580 has a 30 years power warranty; Sharp GSD8K66H-740WT 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 Sharp NB-JD580 and Sharp GSD8K66H-740WT bifacial panels?
Both Sharp NB-JD580 and Sharp GSD8K66H-740WT 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.