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GSD8K66H-735WT vs MS740N-HJTGB 16 of 18 identical Swap Change panels

Sharp GSD8K66H-735WT vs MY Solar MS740N-HJTGB

Sharp GSD8K66H-735WT
Sharp
GSD8K66H-735WT
735 Wp 23.66 % HJT Bifacial
Open panel page Datasheet PDF
VS
MY Solar
MS740N-HJTGB
740 Wp 23.82 % HJT Bifacial Incomplete
Open panel page Datasheet PDF
The verdict

MS740N-HJTGB leads on the differences that matter

The largest is product warranty: 5 yrs longer. 16 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 2 differences
How alike are they
16 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

2 of 18 parameters
Parameter GSD8K66H-735WT MS740N-HJTGB Difference
Product warranty 25 yrs 30 yrs 5 yrs longer
Temperature coefficient -0.260 %/°C -0.240 %/°C 0.020 %/°C better in heat
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-735WT
24,661 kWh
MS740N-HJTGB
24,828 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario GSD8K66H-735WT MS740N-HJTGB
Standard test conditions 25 °C 100.0% of rated power 735 W 740 W
Cool, bright day 40 °C 96.1% of rated power 706 W 713 W
Typical summer roof 55 °C 92.2% of rated power 678 W 687 W
Hot roof 70 °C 88.3% of rated power 649 W 660 W
03

Full specification

Parameter GSD8K66H-735WT MS740N-HJTGB Difference
Power and efficiency
Rated power 735 Wp 740 Wp Effectively the same
Module efficiency 23.66 % 23.82 % Effectively the same
Power density 236.6 Wp/m² 238.2 Wp/m² Effectively the same
Open-circuit voltage 51.50 V 51.35 V Effectively the same
Voltage at max power 43.60 V 43.25 V Effectively the same
Short-circuit current 17.72 A 17.95 A Effectively the same
Current at max power 16.87 A 17.13 A Effectively the same
Temperature
Temperature coefficient -0.260 %/°C -0.240 %/°C +0.020 %/°C for MS740N-HJTGB
Mechanical
Dimensions 2384x1303x35 mm 2384x1303x35 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 39.0 kg 38.3 kg Effectively the same
Weight per kWp 53.1 kg/kWp 51.8 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 30 yrs +5 yrs for MS740N-HJTGB
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr - Not published by MY Solar
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
#602 vs #418
MS740N-HJTGB leads by 184 places
Power density
#582 vs #431
MS740N-HJTGB leads by 151 places
Heat behaviour
#511 vs #13
MS740N-HJTGB leads by 498 places
Weight
#6,818 vs #5,125
MS740N-HJTGB leads by 1,693 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#21 vs #3
MS740N-HJTGB leads by 18 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Sharp GSD8K66H-735WT or MY Solar MS740N-HJTGB?
According to our database: MY Solar MS740N-HJTGB has higher module efficiency (23.82% vs 23.66%); MY Solar MS740N-HJTGB tolerates heat better (temp coeff -0.240%/°C vs -0.260%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Sharp GSD8K66H-735WT and MY Solar MS740N-HJTGB?
Sharp GSD8K66H-735WT has a module efficiency of 23.66%, while MY Solar MS740N-HJTGB is 23.82%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Sharp GSD8K66H-735WT use vs MY Solar MS740N-HJTGB?
Sharp GSD8K66H-735WT uses HJT cells; MY Solar MS740N-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-735WT and MY Solar MS740N-HJTGB?
Sharp GSD8K66H-735WT has a 30 years power warranty; MY Solar MS740N-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-735WT and MY Solar MS740N-HJTGB bifacial panels?
Both Sharp GSD8K66H-735WT and MY Solar MS740N-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.