Sharp GSD8K66H-720WT vs Sharp NB-JD570
VS
The verdict
GSD8K66H-720WT leads on the differences that matter
The largest is module efficiency: 1.11 pp more efficient. 4 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 14 differencesHow alike are they
4
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
14 of 18 parameters
What actually differs
Parameter
GSD8K66H-720WT
NB-JD570
Difference
Module efficiency
23.18 %
22.07 %
1.11 pp more efficient
Temperature coefficient
-0.260 %/°C
-0.300 %/°C
0.040 %/°C better in heat
Rated power
720 Wp
570 Wp
150 W more power
Power density
231.8 Wp/m²
220.7 Wp/m²
11.1 Wp/m² higher
Weight
39.0 kg
32.5 kg
6.5 kg lighter
Product warranty
25 yrs
15 yrs
10 yrs longer
Short-circuit current
17.60 A
13.91 A
3.69 A apart
Module area
3.106 m²
2.583 m²
0.523 m² apart
Cell technology
HJT
TOPCon
HJT vs TOPCon
Weight per kWp
54.2 kg/kWp
57.0 kg/kWp
2.9 kg/kWp lighter
Current at max power
16.75 A
13.32 A
3.43 A apart
Cell count
132
144
12 cells apart
Open-circuit voltage
50.90 V
52.13 V
1.23 V apart
Dimensions
2384x1303x35 mm
2278x1134x30 mm
2384x1303x35 mm vs 2278x1134x30 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
GSD8K66H-720WT
24,157 kWh
NB-JD570
19,125 kWh
Lifetime gap
5,032 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
GSD8K66H-720WT
NB-JD570
Standard test conditions
25 °C
100.0% of rated power
720 W
570 W
Cool, bright day
40 °C
95.5% of rated power
692 W
544 W
Typical summer roof
55 °C
91.0% of rated power
664 W
519 W
Hot roof
70 °C
86.5% of rated power
636 W
493 W
03
Full specification
Parameter
GSD8K66H-720WT
NB-JD570
Difference
Power and efficiency
Rated power
720 Wp
570 Wp
+150 W for GSD8K66H-720WT
Module efficiency
23.18 %
22.07 %
+1.11 pp for GSD8K66H-720WT
Power density
231.8 Wp/m²
220.7 Wp/m²
+11.1 Wp/m² for GSD8K66H-720WT
Open-circuit voltage
50.90 V
52.13 V
1.23 V apart
Voltage at max power
43.00 V
42.80 V
Effectively the same
Short-circuit current
17.60 A
13.91 A
3.69 A apart
Current at max power
16.75 A
13.32 A
3.43 A apart
Temperature
Temperature coefficient
-0.260 %/°C
-0.300 %/°C
+0.040 %/°C for GSD8K66H-720WT
Mechanical
Dimensions
2384x1303x35 mm
2278x1134x30 mm
2384x1303x35 mm vs 2278x1134x30 mm
Module area
3.106 m²
2.583 m²
0.523 m² apart
Weight
39.0 kg
32.5 kg
-6.5 kg for NB-JD570
Weight per kWp
54.2 kg/kWp
57.0 kg/kWp
-2.9 kg/kWp for GSD8K66H-720WT
Warranty and degradation
Product warranty
25 yrs
15 yrs
+10 yrs for GSD8K66H-720WT
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.35 %/yr
-
Not published by Sharp
Technology
Cell technology
HJT
TOPCon
HJT vs TOPCon
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
144
12 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#1,424
vs
#6,136
GSD8K66H-720WT leads by 4,712 places
Power density
#1,347
vs
#6,058
GSD8K66H-720WT leads by 4,711 places
Heat behaviour
#511
vs
#6,093
GSD8K66H-720WT leads by 5,582 places
Weight
#8,370
vs
#11,009
GSD8K66H-720WT leads by 2,639 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#82
vs
#4,743
GSD8K66H-720WT leads by 4,661 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 GSD8K66H-720WT or Sharp NB-JD570?
According to our database: Sharp GSD8K66H-720WT has higher module efficiency (23.18% vs 22.07%); Sharp GSD8K66H-720WT 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 GSD8K66H-720WT and Sharp NB-JD570?
Sharp GSD8K66H-720WT has a module efficiency of 23.18%, while Sharp NB-JD570 is 22.07%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Sharp GSD8K66H-720WT use vs Sharp NB-JD570?
Sharp GSD8K66H-720WT uses HJT cells; Sharp NB-JD570 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 Sharp GSD8K66H-720WT and Sharp NB-JD570?
Sharp GSD8K66H-720WT has a 30 years power warranty; Sharp NB-JD570 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 GSD8K66H-720WT and Sharp NB-JD570 bifacial panels?
Both Sharp GSD8K66H-720WT and Sharp NB-JD570 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.