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660W vs 650W 16 of 19 identical Swap Change panels

Amerisolar AS-8M132-HC-660W vs Amerisolar AS-8M132-HC-650W

Amerisolar
AS-8M132-HC-660W
660 Wp 21.25 % PERC
Open panel page Datasheet PDF
VS
Amerisolar
AS-8M132-HC-650W
650 Wp 20.92 % PERC
Open panel page Datasheet PDF
The verdict

660W leads on the differences that matter

The largest is module efficiency: 0.33 pp more efficient. 16 of 19 comparable parameters are identical.

See all 3 differences
How alike are they
16 of 19 comparable
parameters are identical
identical differs
01

What actually differs

3 of 19 parameters
Parameter 660W 650W Difference
Module efficiency 21.25 % 20.92 % 0.33 pp more efficient
Power density 212.5 Wp/m² 209.2 Wp/m² 3.2 Wp/m² higher
Rated power 660 Wp 650 Wp 10 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 (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
660W
21,099 kWh
650W
20,779 kWh
Lifetime gap
320 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 660W 650W
Standard test conditions 25 °C 100.0% of rated power 660 W 650 W
Cool, bright day 40 °C 94.9% of rated power 626 W 617 W
Typical summer roof 55 °C 89.8% of rated power 593 W 584 W
Hot roof 70 °C 84.7% of rated power 559 W 551 W
03

Full specification

Parameter 660W 650W Difference
Power and efficiency
Rated power 660 Wp 650 Wp +10 W for 660W
Module efficiency 21.25 % 20.92 % +0.33 pp for 660W
Power density 212.5 Wp/m² 209.2 Wp/m² +3.2 Wp/m² for 660W
Open-circuit voltage 45.90 V 45.50 V Effectively the same
Voltage at max power 38.10 V 37.70 V Effectively the same
Short-circuit current 18.46 A 18.36 A Effectively the same
Current at max power 17.33 A 17.25 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 51.5 kg/kWp 52.3 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

Against the whole database

14,129 panels
Efficiency
#8,973 vs #10,090
660W leads by 1,117 places
Power density
#9,028 vs #10,087
660W leads by 1,059 places
Heat behaviour
#8,846 vs #8,846
Tied - the same position in the database
Weight
#4,910 vs #5,814
660W leads by 904 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,796 vs #2,286
660W leads by 490 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Amerisolar AS-8M132-HC-660W or Amerisolar AS-8M132-HC-650W?
According to our database: Amerisolar AS-8M132-HC-660 W has higher module efficiency (21.25% vs 20.92%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Amerisolar AS-8M132-HC-660W and Amerisolar AS-8M132-HC-650W?
Amerisolar AS-8M132-HC-660 W has a module efficiency of 21.25%, while Amerisolar AS-8M132-HC-650 W is 20.92%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Amerisolar AS-8M132-HC-660W use vs Amerisolar AS-8M132-HC-650W?
Amerisolar AS-8M132-HC-660 W uses PERC cells; Amerisolar AS-8M132-HC-650 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-660W and Amerisolar AS-8M132-HC-650W?
Amerisolar AS-8M132-HC-660 W has a 30 years power warranty; Amerisolar AS-8M132-HC-650 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.