AIKO AIKO-G645-MCH72Dw vs AIKO AIKO-G660-MCH72Dw
VS
The verdict
G660-MCH72Dw leads on the differences that matter
The largest is module efficiency: 0.50 pp more efficient. 16 of 19 comparable parameters are identical.
See all 3 differencesHow alike are they
16
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
3 of 19 parameters
What actually differs
Parameter
G645-MCH72Dw
G660-MCH72Dw
Difference
Module efficiency
23.90 %
24.40 %
0.50 pp more efficient
Power density
238.8 Wp/m²
244.3 Wp/m²
5.6 Wp/m² higher
Rated power
645 Wp
660 Wp
15 W more power
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.
G645-MCH72Dw
21,809 kWh
G660-MCH72Dw
22,317 kWh
Lifetime gap
508 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
G645-MCH72Dw
G660-MCH72Dw
Standard test conditions
25 °C
100.0% of rated power
645 W
660 W
Cool, bright day
40 °C
96.1% of rated power
620 W
634 W
Typical summer roof
55 °C
92.2% of rated power
595 W
609 W
Hot roof
70 °C
88.3% of rated power
570 W
583 W
03
Full specification
Parameter
G645-MCH72Dw
G660-MCH72Dw
Difference
Power and efficiency
Rated power
645 Wp
660 Wp
+15 W for G660-MCH72Dw
Module efficiency
23.90 %
24.40 %
+0.50 pp for G660-MCH72Dw
Power density
238.8 Wp/m²
244.3 Wp/m²
+5.6 Wp/m² for G660-MCH72Dw
Open-circuit voltage
53.90 V
54.20 V
Effectively the same
Voltage at max power
45.20 V
45.50 V
Effectively the same
Short-circuit current
15.00 A
15.18 A
Effectively the same
Current at max power
14.27 A
14.51 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
33.5 kg
33.5 kg
Same
Weight per kWp
51.9 kg/kWp
50.8 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
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#351
vs
#99
G660-MCH72Dw leads by 252 places
Power density
#356
vs
#88
G660-MCH72Dw leads by 268 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#5,361
vs
#4,172
G660-MCH72Dw leads by 1,189 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,084
vs
#576
G660-MCH72Dw leads by 508 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-G645-MCH72Dw or AIKO AIKO-G660-MCH72Dw?
According to our database: AIKO AIKO-G660-MCH72Dw has higher module efficiency (24.40% vs 23.90%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of AIKO AIKO-G645-MCH72Dw and AIKO AIKO-G660-MCH72Dw?
AIKO AIKO-G645-MCH72Dw has a module efficiency of 23.90%, while AIKO AIKO-G660-MCH72Dw is 24.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-G645-MCH72Dw use vs AIKO AIKO-G660-MCH72Dw?
AIKO AIKO-G645-MCH72Dw uses Back Contact cells; AIKO AIKO-G660-MCH72Dw 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-G645-MCH72Dw and AIKO AIKO-G660-MCH72Dw?
AIKO AIKO-G645-MCH72Dw has a 30 years power warranty; AIKO AIKO-G660-MCH72Dw 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-G645-MCH72Dw and AIKO AIKO-G660-MCH72Dw bifacial panels?
Both AIKO AIKO-G645-MCH72Dw and AIKO AIKO-G660-MCH72Dw are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.
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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.