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S720M66HT4BF vs GK-4-78HGBD-780M 6 of 19 identical Swap Change panels

Shinson Technology S720M66HT4BF vs Gokin GK-4-78HGBD-780M

Shinson Technology S720M66HT4BF
Shinson Technology
S720M66HT4BF
720 Wp 23.18 % HJT Bifacial
Open panel page Datasheet PDF
VS
Gokin GK-4-78HGBD-780M
Gokin
GK-4-78HGBD-780M
780 Wp 24.30 % Back Contact Bifacial
Open panel page Datasheet PDF
The verdict

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

The largest is module efficiency: 1.12 pp more efficient. 6 of 19 comparable parameters are identical.

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

What actually differs

13 of 19 parameters
Parameter S720M66HT4BF GK-4-78HGBD-780M Difference
Module efficiency 23.18 % 24.30 % 1.12 pp more efficient
Rated power 720 Wp 780 Wp 60 W more power
Power density 231.8 Wp/m² 242.8 Wp/m² 11.1 Wp/m² higher
Product warranty 30 yrs 15 yrs 15 yrs longer
Open-circuit voltage 50.74 V 58.92 V 8.18 V apart
Module area 3.106 m² 3.212 m² 0.106 m² apart
Weight per kWp 53.8 kg/kWp 49.6 kg/kWp 4.1 kg/kWp lighter
Cell technology HJT Back Contact HJT vs Back Contact
Voltage at max power 42.68 V 48.97 V 6.29 V apart
Cell count 132 156 24 cells apart
Short-circuit current 17.67 A 16.78 A 0.89 A apart
Dimensions 2384x1303x35 mm 2465x1303x33 mm 2384x1303x35 mm vs 2465x1303x33 mm
Current at max power 16.87 A 15.93 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.
S720M66HT4BF
24,345 kWh
GK-4-78HGBD-780M
26,374 kWh
Lifetime gap
2,029 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario S720M66HT4BF GK-4-78HGBD-780M
Standard test conditions 25 °C 100.0% of rated power 720 W 780 W
Cool, bright day 40 °C 96.1% of rated power 692 W 750 W
Typical summer roof 55 °C 92.2% of rated power 664 W 719 W
Hot roof 70 °C 88.3% of rated power 636 W 689 W
03

Full specification

Parameter S720M66HT4BF GK-4-78HGBD-780M Difference
Power and efficiency
Rated power 720 Wp 780 Wp +60 W for GK-4-78HGBD-780M
Module efficiency 23.18 % 24.30 % +1.12 pp for GK-4-78HGBD-780M
Power density 231.8 Wp/m² 242.8 Wp/m² +11.1 Wp/m² for GK-4-78HGBD-780M
Open-circuit voltage 50.74 V 58.92 V 8.18 V apart
Voltage at max power 42.68 V 48.97 V 6.29 V apart
Short-circuit current 17.67 A 16.78 A 0.89 A apart
Current at max power 16.87 A 15.93 A 0.94 A apart
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2384x1303x35 mm 2465x1303x33 mm 2384x1303x35 mm vs 2465x1303x33 mm
Module area 3.106 m² 3.212 m² 0.106 m² apart
Weight 38.7 kg 38.7 kg Same
Weight per kWp 53.8 kg/kWp 49.6 kg/kWp -4.1 kg/kWp for GK-4-78HGBD-780M
Warranty and degradation
Product warranty 30 yrs 15 yrs +15 yrs for S720M66HT4BF
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.35 %/yr Same
Technology
Cell technology HJT Back Contact HJT vs Back Contact
Cell type Monocrystalline Monocrystalline Same
Cell count 132 156 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,424 vs #131
GK-4-78HGBD-780M leads by 1,293 places
Power density
#1,347 vs #138
GK-4-78HGBD-780M leads by 1,209 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#7,805 vs #3,161
GK-4-78HGBD-780M leads by 4,644 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#25 vs #15
GK-4-78HGBD-780M leads by 10 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Shinson Technology S720M66HT4BF or Gokin GK-4-78HGBD-780M?
According to our database: Gokin GK-4-78HGBD-780M has higher module efficiency (24.30% vs 23.18%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Shinson Technology S720M66HT4BF and Gokin GK-4-78HGBD-780M?
Shinson Technology S720M66HT4BF has a module efficiency of 23.18%, while Gokin GK-4-78HGBD-780M is 24.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Shinson Technology S720M66HT4BF use vs Gokin GK-4-78HGBD-780M?
Shinson Technology S720M66HT4BF uses HJT cells; Gokin GK-4-78HGBD-780M uses Back Contact. 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 Shinson Technology S720M66HT4BF and Gokin GK-4-78HGBD-780M?
Shinson Technology S720M66HT4BF has a 30 years power warranty; Gokin GK-4-78HGBD-780M 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 Shinson Technology S720M66HT4BF and Gokin GK-4-78HGBD-780M bifacial panels?
Both Shinson Technology S720M66HT4BF and Gokin GK-4-78HGBD-780M 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 Shinson Technology and Gokin 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.