Longi Solar LR8-66HVD-650M vs AIKO AIKO-A675-MAE78Dw
VS
The verdict
AIKO-A675-MAE78Dw leads on the differences that matter
The largest is rated power: 25 W more power. 9 of 19 comparable parameters are identical.
See all 10 differencesHow alike are they
9
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
10 of 19 parameters
What actually differs
Parameter
LR8-66HVD-650M
AIKO-A675-MAE78Dw
Difference
Rated power
650 Wp
675 Wp
25 W more power
Open-circuit voltage
49.72 V
58.98 V
9.26 V apart
Short-circuit current
16.54 A
14.49 A
2.05 A apart
Module area
2.701 m²
2.795 m²
0.094 m² apart
Voltage at max power
40.98 V
48.85 V
7.87 V apart
Current at max power
15.86 A
13.82 A
2.04 A apart
Cell count
132
156
24 cells apart
Weight
33.5 kg
34.5 kg
1.0 kg lighter
Bifacial
Yes
No
Yes vs No
Dimensions
2382x1134x30 mm
2465x1134x30 mm
2382x1134x30 mm vs 2465x1134x30 mm
02
What it means on a roof
Thirty years of production
Each panel's own declared degradation curve, 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.
LR8-66HVD-650M
21,978 kWh
AIKO-A675-MAE78Dw
22,824 kWh
Lifetime gap
846 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
LR8-66HVD-650M
AIKO-A675-MAE78Dw
Standard test conditions
25 °C
100.0% of rated power
650 W
675 W
Cool, bright day
40 °C
96.1% of rated power
625 W
649 W
Typical summer roof
55 °C
92.2% of rated power
599 W
622 W
Hot roof
70 °C
88.3% of rated power
574 W
596 W
03
Full specification
Parameter
LR8-66HVD-650M
AIKO-A675-MAE78Dw
Difference
Power and efficiency
Rated power
650 Wp
675 Wp
+25 W for AIKO-A675-MAE78Dw
Module efficiency
24.06 %
24.10 %
Effectively the same
Power density
240.6 Wp/m²
241.5 Wp/m²
Effectively the same
Open-circuit voltage
49.72 V
58.98 V
9.26 V apart
Voltage at max power
40.98 V
48.85 V
7.87 V apart
Short-circuit current
16.54 A
14.49 A
2.05 A apart
Current at max power
15.86 A
13.82 A
2.04 A apart
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
2465x1134x30 mm
2382x1134x30 mm vs 2465x1134x30 mm
Module area
2.701 m²
2.795 m²
0.094 m² apart
Weight
33.5 kg
34.5 kg
-1.0 kg for LR8-66HVD-650M
Weight per kWp
51.5 kg/kWp
51.1 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
0.35 %/yr
Same
Technology
Cell technology
Back Contact
Back Contact
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
156
24 cells apart
Bifacial
Yes
No
Yes vs No
04
14,005 panels
Against the whole database
Efficiency
#268
vs
#219
AIKO-A675-MAE78Dw leads by 49 places
Power density
#233
vs
#216
AIKO-A675-MAE78Dw leads by 17 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#4,914
vs
#4,436
AIKO-A675-MAE78Dw leads by 478 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#907
vs
#494
AIKO-A675-MAE78Dw leads by 413 places
05
Open the full database
More useful comparisons
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Longi Solar LR8-66HVD-650M vs Longi Solar LR8-66HVD-665M
3 differences, the largest is module efficiency
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Longi Solar LR8-66HVD-650M vs Longi Solar LR8-66HVD-660M
3 differences, the largest is module efficiency
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Longi Solar LR8-66HVD-650M vs Longi Solar LR8-66HVD-655M
The same specification on paper
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Longi Solar LR8-66HVD-650M vs Longi Solar LR8-66HVD-645M
The same specification on paper
Same series, other bin
Longi Solar LR8-66HVD-650M vs Longi Solar LR8-66HVD-640M
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-A675-MAE78Dw vs AIKO AIKO-A700-MAE78Dw
3 differences, the largest is module efficiency
06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Longi Solar LR8-66HVD-650M or AIKO AIKO-A675-MAE78Dw?
According to our database: AIKO AIKO-A675-MAE78Dw has higher module efficiency (24.10% vs 24.06%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR8-66HVD-650M and AIKO AIKO-A675-MAE78Dw?
Longi Solar LR8-66HVD-650M has a module efficiency of 24.06%, while AIKO AIKO-A675-MAE78Dw is 24.10%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR8-66HVD-650M use vs AIKO AIKO-A675-MAE78Dw?
Longi Solar LR8-66HVD-650M uses Back Contact cells; AIKO AIKO-A675-MAE78Dw 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 LR8-66HVD-650M and AIKO AIKO-A675-MAE78Dw?
Longi Solar LR8-66HVD-650M has a 30 years power warranty; AIKO AIKO-A675-MAE78Dw 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 LR8-66HVD-650M and AIKO AIKO-A675-MAE78Dw bifacial panels?
Longi Solar LR8-66HVD-650M is bifacial (captures light from both faces); AIKO AIKO-A675-MAE78Dw is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: See 172 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.