AIKO AIKO-G635-MCH72Mw vs AIKO AIKO-G640-MCH72Mw
VS
The verdict
G640-MCH72Mw 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
G635-MCH72Mw
G640-MCH72Mw
Difference
Module efficiency
23.50 %
23.70 %
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.
G635-MCH72Mw
21,471 kWh
G640-MCH72Mw
21,640 kWh
Lifetime gap
169 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
G635-MCH72Mw
G640-MCH72Mw
Standard test conditions
25 °C
100.0% of rated power
635 W
640 W
Cool, bright day
40 °C
96.1% of rated power
610 W
615 W
Typical summer roof
55 °C
92.2% of rated power
585 W
590 W
Hot roof
70 °C
88.3% of rated power
561 W
565 W
03
Full specification
Parameter
G635-MCH72Mw
G640-MCH72Mw
Difference
Power and efficiency
Rated power
635 Wp
640 Wp
Effectively the same
Module efficiency
23.50 %
23.70 %
+0.20 pp for G640-MCH72Mw
Power density
235.1 Wp/m²
236.9 Wp/m²
Effectively the same
Open-circuit voltage
54.10 V
54.20 V
Effectively the same
Voltage at max power
44.80 V
44.90 V
Effectively the same
Short-circuit current
14.94 A
15.00 A
Effectively the same
Current at max power
14.18 A
14.26 A
Effectively the same
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
31.5 kg
31.5 kg
Same
Weight per kWp
49.6 kg/kWp
49.2 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
#716
vs
#517
G640-MCH72Mw leads by 199 places
Power density
#741
vs
#521
G640-MCH72Mw leads by 220 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#3,152
vs
#2,805
G640-MCH72Mw leads by 347 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,432
vs
#1,252
G640-MCH72Mw leads by 180 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-G635-MCH72Mw or AIKO AIKO-G640-MCH72Mw?
According to our database: AIKO AIKO-G640-MCH72Mw has higher module efficiency (23.70% vs 23.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of AIKO AIKO-G635-MCH72Mw and AIKO AIKO-G640-MCH72Mw?
AIKO AIKO-G635-MCH72Mw has a module efficiency of 23.50%, while AIKO AIKO-G640-MCH72Mw is 23.70%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-G635-MCH72Mw use vs AIKO AIKO-G640-MCH72Mw?
AIKO AIKO-G635-MCH72Mw uses Back Contact cells; AIKO AIKO-G640-MCH72Mw 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-G635-MCH72Mw and AIKO AIKO-G640-MCH72Mw?
AIKO AIKO-G635-MCH72Mw has a 30 years power warranty; AIKO AIKO-G640-MCH72Mw 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.
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.