AIKO AIKO-G640-MCH72Mw vs AIKO AIKO-G645-MCH72Mw
VS
The verdict
G645-MCH72Mw leads on the differences that matter
The largest is cell technology: Back Contact vs N-type. 17 of 19 comparable parameters are identical.
See all 2 differencesHow alike are they
17
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
2 of 19 parameters
What actually differs
Parameter
G640-MCH72Mw
G645-MCH72Mw
Difference
Cell technology
Back Contact
N-type
Back Contact vs N-type
Module efficiency
23.70 %
23.90 %
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.
G640-MCH72Mw
21,640 kWh
G645-MCH72Mw
21,809 kWh
Lifetime gap
169 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
G640-MCH72Mw
G645-MCH72Mw
Standard test conditions
25 °C
100.0% of rated power
640 W
645 W
Cool, bright day
40 °C
96.1% of rated power
615 W
620 W
Typical summer roof
55 °C
92.2% of rated power
590 W
595 W
Hot roof
70 °C
88.3% of rated power
565 W
570 W
03
Full specification
Parameter
G640-MCH72Mw
G645-MCH72Mw
Difference
Power and efficiency
Rated power
640 Wp
645 Wp
Effectively the same
Module efficiency
23.70 %
23.90 %
+0.20 pp for G645-MCH72Mw
Power density
236.9 Wp/m²
238.8 Wp/m²
Effectively the same
Open-circuit voltage
54.20 V
54.30 V
Effectively the same
Voltage at max power
44.90 V
45.00 V
Effectively the same
Short-circuit current
15.00 A
15.06 A
Effectively the same
Current at max power
14.26 A
14.34 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
49.2 kg/kWp
48.8 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
N-type
Back Contact vs N-type
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
144
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#517
vs
#351
G645-MCH72Mw leads by 166 places
Power density
#521
vs
#356
G645-MCH72Mw leads by 165 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#2,805
vs
#2,492
G645-MCH72Mw leads by 313 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,252
vs
#1,065
G645-MCH72Mw leads by 187 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-G640-MCH72Mw or AIKO AIKO-G645-MCH72Mw?
According to our database: AIKO AIKO-G645-MCH72Mw has higher module efficiency (23.90% vs 23.70%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of AIKO AIKO-G640-MCH72Mw and AIKO AIKO-G645-MCH72Mw?
AIKO AIKO-G640-MCH72Mw has a module efficiency of 23.70%, while AIKO AIKO-G645-MCH72Mw is 23.90%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-G640-MCH72Mw use vs AIKO AIKO-G645-MCH72Mw?
AIKO AIKO-G640-MCH72Mw uses Back Contact cells; AIKO AIKO-G645-MCH72Mw uses N-type. 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-G640-MCH72Mw and AIKO AIKO-G645-MCH72Mw?
AIKO AIKO-G640-MCH72Mw has a 30 years power warranty; AIKO AIKO-G645-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.