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G660-MCH72Mw vs G635-MCH72Mw 15 of 19 identical Swap Change panels

AIKO AIKO-G660-MCH72Mw vs AIKO AIKO-G635-MCH72Mw

AIKO AIKO-G660-MCH72Mw
AIKO-G660-MCH72Mw
660 Wp 24.40 % N-type
Open panel page Datasheet PDF
VS
AIKO AIKO-G635-MCH72Mw
AIKO-G635-MCH72Mw
635 Wp 23.50 % Back Contact
Open panel page Datasheet PDF
The verdict

G660-MCH72Mw leads on the differences that matter

The largest is module efficiency: 0.90 pp more efficient. 15 of 19 comparable parameters are identical.

See all 4 differences
How alike are they
15 of 19 comparable
parameters are identical
identical differs
01

What actually differs

4 of 19 parameters
Parameter G660-MCH72Mw G635-MCH72Mw Difference
Module efficiency 24.40 % 23.50 % 0.90 pp more efficient
Power density 244.3 Wp/m² 235.1 Wp/m² 9.3 Wp/m² higher
Rated power 660 Wp 635 Wp 25 W more power
Cell technology N-type Back Contact N-type vs Back Contact
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.
G660-MCH72Mw
22,317 kWh
G635-MCH72Mw
21,471 kWh
Lifetime gap
846 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario G660-MCH72Mw G635-MCH72Mw
Standard test conditions 25 °C 100.0% of rated power 660 W 635 W
Cool, bright day 40 °C 96.1% of rated power 634 W 610 W
Typical summer roof 55 °C 92.2% of rated power 609 W 585 W
Hot roof 70 °C 88.3% of rated power 583 W 561 W
03

Full specification

Parameter G660-MCH72Mw G635-MCH72Mw Difference
Power and efficiency
Rated power 660 Wp 635 Wp +25 W for G660-MCH72Mw
Module efficiency 24.40 % 23.50 % +0.90 pp for G660-MCH72Mw
Power density 244.3 Wp/m² 235.1 Wp/m² +9.3 Wp/m² for G660-MCH72Mw
Open-circuit voltage 54.60 V 54.10 V Effectively the same
Voltage at max power 45.30 V 44.80 V Effectively the same
Short-circuit current 15.24 A 14.94 A Effectively the same
Current at max power 14.57 A 14.18 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 47.7 kg/kWp 49.6 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 N-type Back Contact N-type vs Back Contact
Cell type Monocrystalline Monocrystalline Same
Cell count 144 144 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#99 vs #716
G660-MCH72Mw leads by 617 places
Power density
#88 vs #741
G660-MCH72Mw leads by 653 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#1,829 vs #3,152
G660-MCH72Mw leads by 1,323 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#556 vs #1,432
G660-MCH72Mw leads by 876 places
05

More useful comparisons

Open the full database
Same series, other bin
AIKO AIKO-G660-MCH72Mw vs AIKO AIKO-G655-MCH72Mw
One difference: module efficiency
Same series, other bin
AIKO AIKO-G660-MCH72Mw vs AIKO AIKO-G650-MCH72Mw
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-G660-MCH72Mw vs AIKO AIKO-G645-MCH72Mw
3 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-G660-MCH72Mw vs AIKO AIKO-G640-MCH72Mw
4 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-G660-MCH72Mw vs AIKO AIKO-G630-MCH72Mw
5 differences, the largest is module efficiency
Same series, other bin
AIKO AIKO-G660-MCH72Mw vs AIKO AIKO-G625-MCH72Mw
6 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: AIKO AIKO-G660-MCH72Mw or AIKO AIKO-G635-MCH72Mw?
According to our database: AIKO AIKO-G660-MCH72Mw has higher module efficiency (24.40% 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-G660-MCH72Mw and AIKO AIKO-G635-MCH72Mw?
AIKO AIKO-G660-MCH72Mw has a module efficiency of 24.40%, while AIKO AIKO-G635-MCH72Mw is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does AIKO AIKO-G660-MCH72Mw use vs AIKO AIKO-G635-MCH72Mw?
AIKO AIKO-G660-MCH72Mw uses N-type cells; AIKO AIKO-G635-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-G660-MCH72Mw and AIKO AIKO-G635-MCH72Mw?
AIKO AIKO-G660-MCH72Mw has a 30 years power warranty; AIKO AIKO-G635-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.

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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.