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640 vs 650 16 of 19 identical Swap Change panels

Adani Solar ASB-M12-132-640 vs Adani Solar ASB-M12-132-650

Adani Solar
ASB-M12-132-640
640 Wp 20.55 % PERC Bifacial
Open panel page Datasheet PDF
VS
Adani Solar
ASB-M12-132-650
650 Wp 20.87 % PERC Bifacial
Open panel page Datasheet PDF
The verdict

650 leads on the differences that matter

The largest is module efficiency: 0.32 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 640 650 Difference
Module efficiency 20.55 % 20.87 % 0.32 pp more efficient
Power density 205.5 Wp/m² 208.7 Wp/m² 3.2 Wp/m² higher
Rated power 640 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 (-0.350 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
640
20,742 kWh
650
21,066 kWh
Lifetime gap
324 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 640 650
Standard test conditions 25 °C 100.0% of rated power 640 W 650 W
Cool, bright day 40 °C 94.8% of rated power 606 W 616 W
Typical summer roof 55 °C 89.5% of rated power 573 W 582 W
Hot roof 70 °C 84.2% of rated power 539 W 548 W
03

Full specification

Parameter 640 650 Difference
Power and efficiency
Rated power 640 Wp 650 Wp +10 W for 650
Module efficiency 20.55 % 20.87 % +0.32 pp for 650
Power density 205.5 Wp/m² 208.7 Wp/m² +3.2 Wp/m² for 650
Open-circuit voltage 43.28 V 43.66 V Effectively the same
Voltage at max power 37.01 V 37.32 V Effectively the same
Short-circuit current 18.69 A 18.85 A Effectively the same
Current at max power 17.31 A 17.44 A Effectively the same
Temperature
Temperature coefficient -0.350 %/°C -0.350 %/°C Same
Mechanical
Dimensions 2390x1303x35 mm 2390x1303x35 mm Same
Module area 3.114 m² 3.114 m² Same
Weight 33.6 kg 33.6 kg Same
Weight per kWp 52.5 kg/kWp 51.7 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.55 %/yr 0.55 %/yr Same
Technology
Cell technology PERC PERC Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#11,208 vs #10,332
650 leads by 876 places
Power density
#11,191 vs #10,297
650 leads by 894 places
Heat behaviour
#10,419 vs #10,419
Tied - the same position in the database
Weight
#6,043 vs #5,075
650 leads by 968 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,636 vs #3,920
650 leads by 716 places
05

More useful comparisons

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2 differences, the largest is temperature coefficient
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Adani Solar ASB-M12-132-640 vs Adani Solar ASM-M12-132-640
2 differences, the largest is temperature coefficient
06

Written summary

07

Questions about this pairing

Which panel is better: Adani Solar ASB-M12-132-640 or Adani Solar ASB-M12-132-650?
According to our database: Adani Solar ASB-M12-132-650 has higher module efficiency (20.87% vs 20.55%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Adani Solar ASB-M12-132-640 and Adani Solar ASB-M12-132-650?
Adani Solar ASB-M12-132-640 has a module efficiency of 20.55%, while Adani Solar ASB-M12-132-650 is 20.87%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Adani Solar ASB-M12-132-640 use vs Adani Solar ASB-M12-132-650?
Adani Solar ASB-M12-132-640 uses PERC cells; Adani Solar ASB-M12-132-650 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 Adani Solar ASB-M12-132-640 and Adani Solar ASB-M12-132-650?
Adani Solar ASB-M12-132-640 has a 30 years power warranty; Adani Solar ASB-M12-132-650 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 Adani Solar ASB-M12-132-640 and Adani Solar ASB-M12-132-650 bifacial panels?
Both Adani Solar ASB-M12-132-640 and Adani Solar ASB-M12-132-650 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.