AIKO AIKO-A675-MAE78Dw vs Longi Solar LR8-66HVD-650M
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
AIKO-A675-MAE78Dw
LR8-66HVD-650M
Difference
Rated power
675 Wp
650 Wp
25 W more power
Open-circuit voltage
58.98 V
49.72 V
9.26 V apart
Short-circuit current
14.49 A
16.54 A
2.05 A apart
Module area
2.795 m²
2.701 m²
0.094 m² apart
Voltage at max power
48.85 V
40.98 V
7.87 V apart
Current at max power
13.82 A
15.86 A
2.04 A apart
Cell count
156
132
24 cells apart
Weight
34.5 kg
33.5 kg
1.0 kg lighter
Bifacial
No
Yes
No vs Yes
Dimensions
2465x1134x30 mm
2382x1134x30 mm
2465x1134x30 mm vs 2382x1134x30 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.
AIKO-A675-MAE78Dw
22,824 kWh
LR8-66HVD-650M
21,978 kWh
Lifetime gap
846 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
AIKO-A675-MAE78Dw
LR8-66HVD-650M
Standard test conditions
25 °C
100.0% of rated power
675 W
650 W
Cool, bright day
40 °C
96.1% of rated power
649 W
625 W
Typical summer roof
55 °C
92.2% of rated power
622 W
599 W
Hot roof
70 °C
88.3% of rated power
596 W
574 W
03
Full specification
Parameter
AIKO-A675-MAE78Dw
LR8-66HVD-650M
Difference
Power and efficiency
Rated power
675 Wp
650 Wp
+25 W for AIKO-A675-MAE78Dw
Module efficiency
24.10 %
24.06 %
Effectively the same
Power density
241.5 Wp/m²
240.6 Wp/m²
Effectively the same
Open-circuit voltage
58.98 V
49.72 V
9.26 V apart
Voltage at max power
48.85 V
40.98 V
7.87 V apart
Short-circuit current
14.49 A
16.54 A
2.05 A apart
Current at max power
13.82 A
15.86 A
2.04 A apart
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
2465x1134x30 mm
2382x1134x30 mm
2465x1134x30 mm vs 2382x1134x30 mm
Module area
2.795 m²
2.701 m²
0.094 m² apart
Weight
34.5 kg
33.5 kg
-1.0 kg for LR8-66HVD-650M
Weight per kWp
51.1 kg/kWp
51.5 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
156
132
24 cells apart
Bifacial
No
Yes
No vs Yes
04
14,005 panels
Against the whole database
Efficiency
#219
vs
#268
AIKO-A675-MAE78Dw leads by 49 places
Power density
#216
vs
#233
AIKO-A675-MAE78Dw leads by 17 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#4,436
vs
#4,914
AIKO-A675-MAE78Dw leads by 478 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#494
vs
#907
AIKO-A675-MAE78Dw leads by 413 places
05
Open the full database
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Same series, other bin
Longi Solar LR8-66HVD-650M vs Longi Solar LR8-66HVD-665M
3 differences, the largest is module efficiency
06
Written summary
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07
Questions about this pairing
Which panel is better: AIKO AIKO-A675-MAE78Dw or Longi Solar LR8-66HVD-650M?
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 AIKO AIKO-A675-MAE78Dw and Longi Solar LR8-66HVD-650M?
AIKO AIKO-A675-MAE78Dw has a module efficiency of 24.10%, while Longi Solar LR8-66HVD-650M is 24.06%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-A675-MAE78Dw use vs Longi Solar LR8-66HVD-650M?
AIKO AIKO-A675-MAE78Dw uses Back Contact cells; Longi Solar LR8-66HVD-650M 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-A675-MAE78Dw and Longi Solar LR8-66HVD-650M?
AIKO AIKO-A675-MAE78Dw has a 30 years power warranty; Longi Solar LR8-66HVD-650M 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-A675-MAE78Dw and Longi Solar LR8-66HVD-650M 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 171 AIKO offers · See 172 Longi Solar 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.