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GK-4-78HGBD-780M vs MS720N-HJTGB 5 of 19 identical Swap Change panels

Gokin GK-4-78HGBD-780M vs Mysolar USA MS720N-HJTGB

Gokin GK-4-78HGBD-780M
Gokin
GK-4-78HGBD-780M
780 Wp 24.30 % Back Contact Bifacial
Open panel page Datasheet PDF
VS
Mysolar USA
MS720N-HJTGB
720 Wp 23.17 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

GK-4-78HGBD-780M leads on the differences that matter

The largest is module efficiency: 1.13 pp more efficient. 5 of 19 comparable parameters are identical.

See all 14 differences
How alike are they
5 of 19 comparable
parameters are identical
identical differs
01

What actually differs

14 of 19 parameters
Parameter GK-4-78HGBD-780M MS720N-HJTGB Difference
Module efficiency 24.30 % 23.17 % 1.13 pp more efficient
Rated power 780 Wp 720 Wp 60 W more power
Power density 242.8 Wp/m² 231.8 Wp/m² 11.1 Wp/m² higher
Product warranty 15 yrs 30 yrs 15 yrs longer
Open-circuit voltage 58.92 V 50.75 V 8.17 V apart
Module area 3.212 m² 3.106 m² 0.106 m² apart
Annual degradation 0.35 %/yr 0.25 %/yr 0.10 %/yr slower
Weight per kWp 49.6 kg/kWp 53.9 kg/kWp 4.3 kg/kWp lighter
Cell technology Back Contact HJT Back Contact vs HJT
Voltage at max power 48.97 V 42.70 V 6.27 V apart
Cell count 156 132 24 cells apart
Short-circuit current 16.78 A 17.67 A 0.89 A apart
Dimensions 2465x1303x33 mm 2384x1303x35 mm 2465x1303x33 mm vs 2384x1303x35 mm
Current at max power 15.93 A 16.87 A 0.94 A apart
02

What it means on a roof

Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, 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.
GK-4-78HGBD-780M
26,374 kWh
MS720N-HJTGB
24,721 kWh
Lifetime gap
1,653 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario GK-4-78HGBD-780M MS720N-HJTGB
Standard test conditions 25 °C 100.0% of rated power 780 W 720 W
Cool, bright day 40 °C 96.1% of rated power 750 W 692 W
Typical summer roof 55 °C 92.2% of rated power 719 W 664 W
Hot roof 70 °C 88.3% of rated power 689 W 636 W
03

Full specification

Parameter GK-4-78HGBD-780M MS720N-HJTGB Difference
Power and efficiency
Rated power 780 Wp 720 Wp +60 W for GK-4-78HGBD-780M
Module efficiency 24.30 % 23.17 % +1.13 pp for GK-4-78HGBD-780M
Power density 242.8 Wp/m² 231.8 Wp/m² +11.1 Wp/m² for GK-4-78HGBD-780M
Open-circuit voltage 58.92 V 50.75 V 8.17 V apart
Voltage at max power 48.97 V 42.70 V 6.27 V apart
Short-circuit current 16.78 A 17.67 A 0.89 A apart
Current at max power 15.93 A 16.87 A 0.94 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2465x1303x33 mm 2384x1303x35 mm 2465x1303x33 mm vs 2384x1303x35 mm
Module area 3.212 m² 3.106 m² 0.106 m² apart
Weight 38.7 kg 38.8 kg Effectively the same
Weight per kWp 49.6 kg/kWp 53.9 kg/kWp -4.3 kg/kWp for GK-4-78HGBD-780M
Warranty and degradation
Product warranty 15 yrs 30 yrs +15 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 Back Contact HJT Back Contact vs HJT
Cell type Monocrystalline Monocrystalline Same
Cell count 156 132 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#131 vs #1,473
GK-4-78HGBD-780M leads by 1,342 places
Power density
#138 vs #1,347
GK-4-78HGBD-780M leads by 1,209 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#3,161 vs #8,017
GK-4-78HGBD-780M leads by 4,856 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#15 vs #27
GK-4-78HGBD-780M leads by 12 places
05

More useful comparisons

Open the full database
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Gokin GK-4-78HGBD-780M vs Gokin GK-4-78HGBD-775M
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Gokin GK-4-78HGBD-780M vs Gokin GK-4-78HGBD-770M
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Gokin GK-4-78HGBD-780M vs Gokin GK-4-78HGBD-765M
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Gokin GK-4-78HGBD-780M vs Gokin GK-4-78HGBD-760M
3 differences, the largest is module efficiency
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Mysolar USA
Mysolar USA MS720N-HJTGB vs Mysolar USA MS715N-HJTGB
The same specification on paper
Same series, other bin
Mysolar USA
Mysolar USA MS720N-HJTGB vs Mysolar USA MS710N-HJTGB
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Gokin GK-4-78HGBD-780M or Mysolar USA MS720N-HJTGB?
According to our database: Gokin GK-4-78HGBD-780M has higher module efficiency (24.30% vs 23.17%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Gokin GK-4-78HGBD-780M and Mysolar USA MS720N-HJTGB?
Gokin GK-4-78HGBD-780M has a module efficiency of 24.30%, while Mysolar USA MS720N-HJTGB is 23.17%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Gokin GK-4-78HGBD-780M use vs Mysolar USA MS720N-HJTGB?
Gokin GK-4-78HGBD-780M uses Back Contact cells; Mysolar USA 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 Gokin GK-4-78HGBD-780M and Mysolar USA MS720N-HJTGB?
Gokin GK-4-78HGBD-780M has a 30 years power warranty; Mysolar USA 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 Gokin GK-4-78HGBD-780M and Mysolar USA MS720N-HJTGB bifacial panels?
Both Gokin GK-4-78HGBD-780M and Mysolar USA 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 Gokin and Mysolar USA 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.