Amerisolar AS-8M132-HC-640W vs Amerisolar AS-8M132-HC-645W
VS
The verdict
Identical on every published parameter
All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.
How alike are they
19
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
0 of 19 parameters
What actually differs
Every comparable parameter agrees. The full specification is below.
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 (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
640W
20,460 kWh
645W
20,619 kWh
Lifetime gap
159 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
640W
645W
Standard test conditions
25 °C
100.0% of rated power
640 W
645 W
Cool, bright day
40 °C
94.9% of rated power
607 W
612 W
Typical summer roof
55 °C
89.8% of rated power
575 W
579 W
Hot roof
70 °C
84.7% of rated power
542 W
546 W
03
Full specification
Parameter
640W
645W
Difference
Power and efficiency
Rated power
640 Wp
645 Wp
Effectively the same
Module efficiency
20.60 %
20.76 %
Effectively the same
Power density
206.0 Wp/m²
207.6 Wp/m²
Effectively the same
Open-circuit voltage
45.10 V
45.30 V
Effectively the same
Voltage at max power
37.30 V
37.50 V
Effectively the same
Short-circuit current
18.26 A
18.31 A
Effectively the same
Current at max power
17.16 A
17.20 A
Effectively the same
Temperature
Temperature coefficient
-0.340 %/°C
-0.340 %/°C
Same
Mechanical
Dimensions
2384x1303x35 mm
2384x1303x35 mm
Same
Module area
3.106 m²
3.106 m²
Same
Weight
34.0 kg
34.0 kg
Same
Weight per kWp
53.1 kg/kWp
52.7 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
20 yrs
20 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.60 %/yr
0.60 %/yr
Same
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
No
No
Same
04
14,129 panels
Against the whole database
Efficiency
#11,172
vs
#10,690
645W leads by 482 places
Power density
#11,181
vs
#10,638
645W leads by 543 places
Heat behaviour
#8,846
vs
#8,846
Tied - the same position in the database
Weight
#6,974
vs
#6,416
645W leads by 558 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#2,945
vs
#2,596
645W leads by 349 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: Amerisolar AS-8M132-HC-640W or Amerisolar AS-8M132-HC-645W?
According to our database: Amerisolar AS-8M132-HC-645 W has higher module efficiency (20.76% vs 20.60%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Amerisolar AS-8M132-HC-640W and Amerisolar AS-8M132-HC-645W?
Amerisolar AS-8M132-HC-640 W has a module efficiency of 20.60%, while Amerisolar AS-8M132-HC-645 W is 20.76%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Amerisolar AS-8M132-HC-640W use vs Amerisolar AS-8M132-HC-645W?
Amerisolar AS-8M132-HC-640 W uses PERC cells; Amerisolar AS-8M132-HC-645 W uses PERC. 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 Amerisolar AS-8M132-HC-640W and Amerisolar AS-8M132-HC-645W?
Amerisolar AS-8M132-HC-640 W has a 30 years power warranty; Amerisolar AS-8M132-HC-645 W 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 3 Amerisolar 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.