AIKO AIKO-A780-GRH78Dw vs Gokin GK-4-78HGBD-780M
VS
The verdict
GK-4-78HGBD-780M leads on the differences that matter
The largest is weight: 1.1 kg lighter. 17 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See the one differenceHow alike are they
17
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
1 of 18 parameters
What actually differs
Parameter
AIKO-A780-GRH78Dw
GK-4-78HGBD-780M
Difference
Weight
39.8 kg
38.7 kg
1.1 kg lighter
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
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.
AIKO-A780-GRH78Dw
26,171 kWh
GK-4-78HGBD-780M
26,171 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
AIKO-A780-GRH78Dw
GK-4-78HGBD-780M
Standard test conditions
25 °C
100.0% of rated power
780 W
780 W
Cool, bright day
40 °C
96.1% of rated power
750 W
750 W
Typical summer roof
55 °C
92.2% of rated power
719 W
719 W
Hot roof
70 °C
88.3% of rated power
689 W
689 W
03
Full specification
Parameter
AIKO-A780-GRH78Dw
GK-4-78HGBD-780M
Difference
Power and efficiency
Rated power
780 Wp
780 Wp
Same
Module efficiency
24.30 %
24.30 %
Same
Power density
242.8 Wp/m²
242.8 Wp/m²
Same
Open-circuit voltage
58.92 V
58.92 V
Same
Voltage at max power
48.97 V
48.97 V
Same
Short-circuit current
16.78 A
16.78 A
Same
Current at max power
15.93 A
15.93 A
Same
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
2465x1303x33 mm
2465x1303x33 mm
Same
Module area
3.212 m²
3.212 m²
Same
Weight
39.8 kg
38.7 kg
-1.1 kg for GK-4-78HGBD-780M
Weight per kWp
51.0 kg/kWp
49.6 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
-
0.35 %/yr
Not published by AIKO
Technology
Cell technology
Back Contact
Back Contact
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
156
156
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#131
vs
#131
Tied - the same position in the database
Power density
#138
vs
#138
Tied - the same position in the database
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#4,377
vs
#3,161
GK-4-78HGBD-780M leads by 1,216 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#16
vs
#15
GK-4-78HGBD-780M leads by 1 place
05
Open the full database
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The same specification on paper
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AIKO AIKO-A780-GRH78Dw vs AIKO AIKO-A775-GRH78Dw
One difference: module efficiency
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: AIKO AIKO-A780-GRH78Dw or Gokin GK-4-78HGBD-780M?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of AIKO AIKO-A780-GRH78Dw and Gokin GK-4-78HGBD-780M?
AIKO AIKO-A780-GRH78Dw has a module efficiency of 24.30%, 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 AIKO AIKO-A780-GRH78Dw use vs Gokin GK-4-78HGBD-780M?
AIKO AIKO-A780-GRH78Dw uses Back Contact 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 AIKO AIKO-A780-GRH78Dw and Gokin GK-4-78HGBD-780M?
AIKO AIKO-A780-GRH78Dw 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 AIKO AIKO-A780-GRH78Dw and Gokin GK-4-78HGBD-780M bifacial panels?
Both AIKO AIKO-A780-GRH78Dw 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.
Shop prices: See 170 AIKO offers · See 7 Gokin offers
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.