Longi Solar LR8-66HYD-665M vs AIKO AIKO-A665-MDE72Dw
VS
The verdict
AIKO-A665-MDE72Dw leads on the differences that matter
The largest is product warranty: 3 yrs longer. 11 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.
See all 7 differencesHow alike are they
11
of 18 comparable
parameters are identical
parameters are identical
identical
differs
not published
01
7 of 18 parameters
What actually differs
Parameter
LR8-66HYD-665M
AIKO-A665-MDE72Dw
Difference
Product warranty
12 yrs
15 yrs
3 yrs longer
Open-circuit voltage
50.02 V
54.40 V
4.38 V apart
Short-circuit current
16.78 A
15.24 A
1.54 A apart
Voltage at max power
41.28 V
45.60 V
4.32 V apart
Cell count
132
144
12 cells apart
Current at max power
16.11 A
14.59 A
1.52 A apart
Bifacial
Yes
No
Yes vs No
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.
LR8-66HYD-665M
22,312 kWh
AIKO-A665-MDE72Dw
22,312 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
LR8-66HYD-665M
AIKO-A665-MDE72Dw
Standard test conditions
25 °C
100.0% of rated power
665 W
665 W
Cool, bright day
40 °C
96.1% of rated power
639 W
639 W
Typical summer roof
55 °C
92.2% of rated power
613 W
613 W
Hot roof
70 °C
88.3% of rated power
587 W
587 W
03
Full specification
Parameter
LR8-66HYD-665M
AIKO-A665-MDE72Dw
Difference
Power and efficiency
Rated power
665 Wp
665 Wp
Same
Module efficiency
24.60 %
24.60 %
Same
Power density
246.2 Wp/m²
246.2 Wp/m²
Same
Open-circuit voltage
50.02 V
54.40 V
4.38 V apart
Voltage at max power
41.28 V
45.60 V
4.32 V apart
Short-circuit current
16.78 A
15.24 A
1.54 A apart
Current at max power
16.11 A
14.59 A
1.52 A apart
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2382x1134x30 mm
Same
Module area
2.701 m²
2.701 m²
Same
Weight
33.5 kg
33.0 kg
Effectively the same
Weight per kWp
50.4 kg/kWp
49.6 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for AIKO-A665-MDE72Dw
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
-
0.35 %/yr
Not published by Longi Solar
Technology
Cell technology
Back Contact
Back Contact
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
144
12 cells apart
Bifacial
Yes
No
Yes vs No
04
14,005 panels
Against the whole database
Efficiency
#51
vs
#51
Tied - the same position in the database
Power density
#42
vs
#42
Tied - the same position in the database
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#3,742
vs
#3,172
AIKO-A665-MDE72Dw leads by 570 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#643
vs
#414
AIKO-A665-MDE72Dw leads by 229 places
05
Open the full database
More useful comparisons
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Longi Solar LR8-66HYD-665M vs Longi Solar LR8-66HYD-670M
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Longi Solar LR8-66HYD-665M vs Longi Solar LR8-66HYD-660M
One difference: module efficiency
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Longi Solar LR8-66HYD-665M vs Longi Solar LR7-72HYD-660M
7 differences, the largest is open-circuit voltage
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Longi Solar LR8-66HYD-665M vs Longi Solar LR8-66HYD-655M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR8-66HYD-665M vs Longi Solar LR7-72HYD-655M
9 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR8-66HYD-665M vs Longi Solar LR8-66HYD-650M
3 differences, the largest is module efficiency
06
Written summary
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07
Questions about this pairing
Which panel is better: Longi Solar LR8-66HYD-665M or AIKO AIKO-A665-MDE72Dw?
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 Longi Solar LR8-66HYD-665M and AIKO AIKO-A665-MDE72Dw?
Longi Solar LR8-66HYD-665M has a module efficiency of 24.60%, while AIKO AIKO-A665-MDE72Dw is 24.60%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR8-66HYD-665M use vs AIKO AIKO-A665-MDE72Dw?
Longi Solar LR8-66HYD-665M uses Back Contact cells; AIKO AIKO-A665-MDE72Dw 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 Longi Solar LR8-66HYD-665M and AIKO AIKO-A665-MDE72Dw?
Longi Solar LR8-66HYD-665M has a 30 years power warranty; AIKO AIKO-A665-MDE72Dw 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 Longi Solar LR8-66HYD-665M and AIKO AIKO-A665-MDE72Dw bifacial panels?
Longi Solar LR8-66HYD-665M is bifacial (captures light from both faces); AIKO AIKO-A665-MDE72Dw is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: See 174 Longi Solar offers · See 171 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.