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GSD8K66H-740WT vs MS720N-HJTGB 13 of 19 identical Swap Change panels

Sharp GSD8K66H-740WT vs MY Solar MS720N-HJTGB

Sharp GSD8K66H-740WT
Sharp
GSD8K66H-740WT
740 Wp 23.82 % HJT Bifacial
Open panel page Datasheet PDF
VS
MY Solar
MS720N-HJTGB
720 Wp 23.17 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

GSD8K66H-740WT leads on the differences that matter

The largest is module efficiency: 0.65 pp more efficient. 13 of 19 comparable parameters are identical.

See all 6 differences
How alike are they
13 of 19 comparable
parameters are identical
identical differs
01

What actually differs

6 of 19 parameters
Parameter GSD8K66H-740WT MS720N-HJTGB Difference
Module efficiency 23.82 % 23.17 % 0.65 pp more efficient
Product warranty 25 yrs 30 yrs 5 yrs longer
Power density 238.2 Wp/m² 231.8 Wp/m² 6.4 Wp/m² higher
Rated power 740 Wp 720 Wp 20 W more power
Annual degradation 0.35 %/yr 0.25 %/yr 0.10 %/yr slower
Voltage at max power 43.80 V 42.70 V 1.10 V apart
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.
GSD8K66H-740WT
25,022 kWh
MS720N-HJTGB
24,721 kWh
Lifetime gap
301 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario GSD8K66H-740WT MS720N-HJTGB
Standard test conditions 25 °C 100.0% of rated power 740 W 720 W
Cool, bright day 40 °C 96.1% of rated power 711 W 692 W
Typical summer roof 55 °C 92.2% of rated power 682 W 664 W
Hot roof 70 °C 88.3% of rated power 653 W 636 W
03

Full specification

Parameter GSD8K66H-740WT MS720N-HJTGB Difference
Power and efficiency
Rated power 740 Wp 720 Wp +20 W for GSD8K66H-740WT
Module efficiency 23.82 % 23.17 % +0.65 pp for GSD8K66H-740WT
Power density 238.2 Wp/m² 231.8 Wp/m² +6.4 Wp/m² for GSD8K66H-740WT
Open-circuit voltage 51.70 V 50.75 V Effectively the same
Voltage at max power 43.80 V 42.70 V 1.10 V apart
Short-circuit current 17.76 A 17.67 A Effectively the same
Current at max power 16.91 A 16.87 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 38.8 kg Effectively the same
Weight per kWp 52.7 kg/kWp 53.9 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 30 yrs +5 yrs for MS720N-HJTGB
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.25 %/yr -0.10 %/yr for MS720N-HJTGB
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
#418 vs #1,473
GSD8K66H-740WT leads by 1,055 places
Power density
#431 vs #1,347
GSD8K66H-740WT leads by 916 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#6,344 vs #8,017
GSD8K66H-740WT leads by 1,673 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#12 vs #27
GSD8K66H-740WT leads by 15 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Sharp GSD8K66H-740WT or MY Solar MS720N-HJTGB?
According to our database: Sharp GSD8K66H-740WT has higher module efficiency (23.82% vs 23.17%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Sharp GSD8K66H-740WT and MY Solar MS720N-HJTGB?
Sharp GSD8K66H-740WT has a module efficiency of 23.82%, while MY Solar MS720N-HJTGB is 23.17%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Sharp GSD8K66H-740WT use vs MY Solar MS720N-HJTGB?
Sharp GSD8K66H-740WT uses HJT cells; MY Solar MS720N-HJTGB 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-740WT and MY Solar MS720N-HJTGB?
Sharp GSD8K66H-740WT has a 30 years power warranty; MY Solar MS720N-HJTGB 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-740WT and MY Solar MS720N-HJTGB bifacial panels?
Both Sharp GSD8K66H-740WT and MY Solar MS720N-HJTGB 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.
Compare Sharp and MY Solar as manufacturers Portfolio, efficiency, cell technologies and warranty terms

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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.