AIKO AIKO-A665-MDE72Mw vs AIKO AIKO-A805-GRH78Dw
VS
The verdict
A805-GRH78Dw leads on the differences that matter
The largest is rated power: 140 W more power. 5 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 13 differencesHow alike are they
5
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
13 of 18 parameters
What actually differs
Parameter
A665-MDE72Mw
A805-GRH78Dw
Difference
Rated power
665 Wp
805 Wp
140 W more power
Module efficiency
24.60 %
25.10 %
0.50 pp more efficient
Weight
29.0 kg
39.8 kg
10.8 kg lighter
Weight per kWp
43.6 kg/kWp
49.4 kg/kWp
5.8 kg/kWp lighter
Open-circuit voltage
54.70 V
59.42 V
4.72 V apart
Module area
2.701 m²
3.212 m²
0.511 m² apart
Short-circuit current
15.30 A
17.13 A
1.83 A apart
Power density
246.2 Wp/m²
250.6 Wp/m²
4.4 Wp/m² higher
Voltage at max power
45.40 V
49.46 V
4.06 V apart
Cell count
144
156
12 cells apart
Current at max power
14.65 A
16.28 A
1.63 A apart
Bifacial
No
Yes
No vs Yes
Dimensions
2382x1134x30 mm
2465x1303x33 mm
2382x1134x30 mm vs 2465x1303x33 mm
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.
A665-MDE72Mw
22,312 kWh
A805-GRH78Dw
27,009 kWh
Lifetime gap
4,697 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
A665-MDE72Mw
A805-GRH78Dw
Standard test conditions
25 °C
100.0% of rated power
665 W
805 W
Cool, bright day
40 °C
96.1% of rated power
639 W
774 W
Typical summer roof
55 °C
92.2% of rated power
613 W
742 W
Hot roof
70 °C
88.3% of rated power
587 W
711 W
03
Full specification
Parameter
A665-MDE72Mw
A805-GRH78Dw
Difference
Power and efficiency
Rated power
665 Wp
805 Wp
+140 W for A805-GRH78Dw
Module efficiency
24.60 %
25.10 %
+0.50 pp for A805-GRH78Dw
Power density
246.2 Wp/m²
250.6 Wp/m²
+4.4 Wp/m² for A805-GRH78Dw
Open-circuit voltage
54.70 V
59.42 V
4.72 V apart
Voltage at max power
45.40 V
49.46 V
4.06 V apart
Short-circuit current
15.30 A
17.13 A
1.83 A apart
Current at max power
14.65 A
16.28 A
1.63 A apart
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2465x1303x33 mm
2382x1134x30 mm vs 2465x1303x33 mm
Module area
2.701 m²
3.212 m²
0.511 m² apart
Weight
29.0 kg
39.8 kg
-10.8 kg for A665-MDE72Mw
Weight per kWp
43.6 kg/kWp
49.4 kg/kWp
-5.8 kg/kWp for A665-MDE72Mw
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
144
156
12 cells apart
Bifacial
No
Yes
No vs Yes
04
14,005 panels
Against the whole database
Efficiency
#51
vs
#3
A805-GRH78Dw leads by 48 places
Power density
#42
vs
#3
A805-GRH78Dw leads by 39 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#315
vs
#2,977
A665-MDE72Mw leads by 2,662 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#390
vs
#1
A805-GRH78Dw leads by 389 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: AIKO AIKO-A665-MDE72Mw or AIKO AIKO-A805-GRH78Dw?
According to our database: AIKO AIKO-A805-GRH78Dw has higher module efficiency (25.10% vs 24.60%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of AIKO AIKO-A665-MDE72Mw and AIKO AIKO-A805-GRH78Dw?
AIKO AIKO-A665-MDE72Mw has a module efficiency of 24.60%, while AIKO AIKO-A805-GRH78Dw is 25.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-A665-MDE72Mw use vs AIKO AIKO-A805-GRH78Dw?
AIKO AIKO-A665-MDE72Mw uses Back Contact cells; AIKO AIKO-A805-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-A665-MDE72Mw and AIKO AIKO-A805-GRH78Dw?
AIKO AIKO-A665-MDE72Mw has a 30 years power warranty; AIKO AIKO-A805-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-A665-MDE72Mw and AIKO AIKO-A805-GRH78Dw bifacial panels?
AIKO AIKO-A805-GRH78Dw is bifacial (captures light from both faces); AIKO AIKO-A665-MDE72Mw is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
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.