AIKO AIKO-A790-GRH78Dw vs AIKO AIKO-A775-GRH78Dw
VS
The verdict
A790-GRH78Dw leads on the differences that matter
The largest is module efficiency: 0.50 pp more efficient. 15 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 3 differencesHow alike are they
15
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
3 of 18 parameters
What actually differs
Parameter
A790-GRH78Dw
A775-GRH78Dw
Difference
Module efficiency
24.60 %
24.10 %
0.50 pp more efficient
Power density
246.0 Wp/m²
241.3 Wp/m²
4.7 Wp/m² higher
Rated power
790 Wp
775 Wp
15 W more power
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.
A790-GRH78Dw
26,506 kWh
A775-GRH78Dw
26,003 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
A790-GRH78Dw
A775-GRH78Dw
Standard test conditions
25 °C
100.0% of rated power
790 W
775 W
Cool, bright day
40 °C
96.1% of rated power
759 W
745 W
Typical summer roof
55 °C
92.2% of rated power
728 W
715 W
Hot roof
70 °C
88.3% of rated power
698 W
684 W
03
Full specification
Parameter
A790-GRH78Dw
A775-GRH78Dw
Difference
Power and efficiency
Rated power
790 Wp
775 Wp
+15 W for A790-GRH78Dw
Module efficiency
24.60 %
24.10 %
+0.50 pp for A790-GRH78Dw
Power density
246.0 Wp/m²
241.3 Wp/m²
+4.7 Wp/m² for A790-GRH78Dw
Open-circuit voltage
59.12 V
58.82 V
Effectively the same
Voltage at max power
49.17 V
48.87 V
Effectively the same
Short-circuit current
16.92 A
16.71 A
Effectively the same
Current at max power
16.07 A
15.86 A
Effectively the 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
39.8 kg
Same
Weight per kWp
50.4 kg/kWp
51.4 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
-
-
Neither datasheet publishes this
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
#51
vs
#219
A790-GRH78Dw leads by 168 places
Power density
#69
vs
#227
A790-GRH78Dw leads by 158 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#3,756
vs
#4,724
A790-GRH78Dw leads by 968 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#6
vs
#30
A790-GRH78Dw leads by 24 places
05
Open the full database
More useful comparisons
Same series, other bin
AIKO AIKO-A790-GRH78Dw vs AIKO AIKO-A805-GRH78Dw
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-A790-GRH78Dw vs AIKO AIKO-A800-GRH78Dw
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-A790-GRH78Dw vs AIKO AIKO-A795-GRH78Dw
One difference: module efficiency
Same series, other bin
AIKO AIKO-A790-GRH78Dw vs AIKO AIKO-A785-GRH78Dw
One difference: module efficiency
Same series, other bin
AIKO AIKO-A790-GRH78Dw vs AIKO AIKO-A780-GRH78Dw
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-A790-GRH78Dw vs AIKO AIKO-A770-GRH78Dw
3 differences, the largest is module efficiency
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: AIKO AIKO-A790-GRH78Dw or AIKO AIKO-A775-GRH78Dw?
According to our database: AIKO AIKO-A790-GRH78Dw has higher module efficiency (24.60% vs 24.10%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of AIKO AIKO-A790-GRH78Dw and AIKO AIKO-A775-GRH78Dw?
AIKO AIKO-A790-GRH78Dw has a module efficiency of 24.60%, while AIKO AIKO-A775-GRH78Dw is 24.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-A790-GRH78Dw use vs AIKO AIKO-A775-GRH78Dw?
AIKO AIKO-A790-GRH78Dw uses Back Contact cells; AIKO AIKO-A775-GRH78Dw 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-A790-GRH78Dw and AIKO AIKO-A775-GRH78Dw?
AIKO AIKO-A790-GRH78Dw has a 30 years power warranty; AIKO AIKO-A775-GRH78Dw 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-A790-GRH78Dw and AIKO AIKO-A775-GRH78Dw bifacial panels?
Both AIKO AIKO-A790-GRH78Dw and AIKO AIKO-A775-GRH78Dw 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 180 AIKO 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.