AIKO AIKO-A645-MAE72Mw vs AIKO AIKO-A640-MAE72Mw
VS
The verdict
A645-MAE72Mw leads on the differences that matter
The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.
See the one differenceHow alike are they
18
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
1 of 19 parameters
What actually differs
Parameter
A645-MAE72Mw
A640-MAE72Mw
Difference
Module efficiency
25.00 %
24.80 %
0.20 pp more efficient
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.
A645-MAE72Mw
21,809 kWh
A640-MAE72Mw
21,640 kWh
Lifetime gap
169 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
A645-MAE72Mw
A640-MAE72Mw
Standard test conditions
25 °C
100.0% of rated power
645 W
640 W
Cool, bright day
40 °C
96.1% of rated power
620 W
615 W
Typical summer roof
55 °C
92.2% of rated power
595 W
590 W
Hot roof
70 °C
88.3% of rated power
570 W
565 W
03
Full specification
Parameter
A645-MAE72Mw
A640-MAE72Mw
Difference
Power and efficiency
Rated power
645 Wp
640 Wp
Effectively the same
Module efficiency
25.00 %
24.80 %
+0.20 pp for A645-MAE72Mw
Power density
249.7 Wp/m²
247.7 Wp/m²
Effectively the same
Open-circuit voltage
54.89 V
54.79 V
Effectively the same
Voltage at max power
45.58 V
45.48 V
Effectively the same
Short-circuit current
14.92 A
14.84 A
Effectively the same
Current at max power
14.16 A
14.08 A
Effectively the same
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
2278x1134x30 mm
2278x1134x30 mm
Same
Module area
2.583 m²
2.583 m²
Same
Weight
27.0 kg
27.0 kg
Same
Weight per kWp
41.9 kg/kWp
42.2 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
144
144
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#4
vs
#12
A645-MAE72Mw leads by 8 places
Power density
#8
vs
#35
A645-MAE72Mw leads by 27 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#194
vs
#209
A645-MAE72Mw leads by 15 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#442
vs
#628
A645-MAE72Mw leads by 186 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: AIKO AIKO-A645-MAE72Mw or AIKO AIKO-A640-MAE72Mw?
According to our database: AIKO AIKO-A645-MAE72Mw has higher module efficiency (25.00% vs 24.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of AIKO AIKO-A645-MAE72Mw and AIKO AIKO-A640-MAE72Mw?
AIKO AIKO-A645-MAE72Mw has a module efficiency of 25.00%, while AIKO AIKO-A640-MAE72Mw is 24.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-A645-MAE72Mw use vs AIKO AIKO-A640-MAE72Mw?
AIKO AIKO-A645-MAE72Mw uses Back Contact cells; AIKO AIKO-A640-MAE72Mw 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-A645-MAE72Mw and AIKO AIKO-A640-MAE72Mw?
AIKO AIKO-A645-MAE72Mw has a 30 years power warranty; AIKO AIKO-A640-MAE72Mw 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.
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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.