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730WT vs 720WT 16 of 19 identical Swap Change panels

Sharp GSD8K66H-730WT vs Sharp GSD8K66H-720WT

Sharp GSD8K66H-730WT
Sharp
GSD8K66H-730WT
730 Wp 23.50 % HJT Bifacial
Open panel page Datasheet PDF
VS
Sharp GSD8K66H-720WT
Sharp
GSD8K66H-720WT
720 Wp 23.18 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

730WT 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 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 730WT 720WT Difference
Module efficiency 23.50 % 23.18 % 0.32 pp more efficient
Power density 235.0 Wp/m² 231.8 Wp/m² 3.2 Wp/m² higher
Rated power 730 Wp 720 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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
730WT
24,683 kWh
720WT
24,345 kWh
Lifetime gap
338 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 730WT 720WT
Standard test conditions 25 °C 100.0% of rated power 730 W 720 W
Cool, bright day 40 °C 96.1% of rated power 702 W 692 W
Typical summer roof 55 °C 92.2% of rated power 673 W 664 W
Hot roof 70 °C 88.3% of rated power 645 W 636 W
03

Full specification

Parameter 730WT 720WT Difference
Power and efficiency
Rated power 730 Wp 720 Wp +10 W for 730WT
Module efficiency 23.50 % 23.18 % +0.32 pp for 730WT
Power density 235.0 Wp/m² 231.8 Wp/m² +3.2 Wp/m² for 730WT
Open-circuit voltage 51.30 V 50.90 V Effectively the same
Voltage at max power 43.40 V 43.00 V Effectively the same
Short-circuit current 17.68 A 17.60 A Effectively the same
Current at max power 16.83 A 16.75 A Effectively the same
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2384x1303x35 mm 2384x1303x35 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 39.0 kg 39.0 kg Same
Weight per kWp 53.4 kg/kWp 54.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.35 %/yr Same
Technology
Cell technology HJT HJT Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#716 vs #1,424
730WT leads by 708 places
Power density
#800 vs #1,347
730WT leads by 547 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#7,348 vs #8,370
730WT leads by 1,022 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#36 vs #82
730WT leads by 46 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Sharp GSD8K66H-730WT or Sharp GSD8K66H-720WT?
According to our database: Sharp GSD8K66H-730WT 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 Sharp GSD8K66H-730WT and Sharp GSD8K66H-720WT?
Sharp GSD8K66H-730WT has a module efficiency of 23.50%, while Sharp GSD8K66H-720WT is 23.18%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Sharp GSD8K66H-730WT use vs Sharp GSD8K66H-720WT?
Sharp GSD8K66H-730WT uses HJT cells; Sharp GSD8K66H-720WT 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 GSD8K66H-730WT and Sharp GSD8K66H-720WT?
Sharp GSD8K66H-730WT has a 30 years power warranty; Sharp GSD8K66H-720WT 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-730WT and Sharp GSD8K66H-720WT bifacial panels?
Both Sharp GSD8K66H-730WT and Sharp GSD8K66H-720WT 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.