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E490HCM132-B vs E450HCM120-B 9 of 19 identical Swap Change panels

Emmvee E490HCM132-B vs Emmvee E450HCM120-B

Emmvee
E490HCM132-B
490 Wp 20.61 % PERC
Open panel page Datasheet PDF
VS
Emmvee
E450HCM120-B
450 Wp 20.74 % PERC
Open panel page Datasheet PDF
The verdict

E490HCM132-B leads on the differences that matter

The largest is rated power: 40 W more power. 9 of 19 comparable parameters are identical.

See all 10 differences
How alike are they
9 of 19 comparable
parameters are identical
identical differs
01

What actually differs

10 of 19 parameters
Parameter E490HCM132-B E450HCM120-B Difference
Rated power 490 Wp 450 Wp 40 W more power
Module area 2.378 m² 2.169 m² 0.209 m² apart
Open-circuit voltage 44.65 V 41.56 V 3.09 V apart
Voltage at max power 38.94 V 34.31 V 4.63 V apart
Cell count 132 120 12 cells apart
Weight per kWp 51.0 kg/kWp 53.3 kg/kWp 2.3 kg/kWp lighter
Weight 25.0 kg 24.0 kg 1.0 kg lighter
Short-circuit current 13.09 A 13.81 A 0.72 A apart
Dimensions 2097x1134x35 mm 1913x1134x35 mm 2097x1134x35 mm vs 1913x1134x35 mm
Current at max power 12.59 A 13.12 A 0.53 A apart
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.
E490HCM132-B
15,880 kWh
E450HCM120-B
14,584 kWh
Lifetime gap
1,296 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario E490HCM132-B E450HCM120-B
Standard test conditions 25 °C 100.0% of rated power 490 W 450 W
Cool, bright day 40 °C 94.8% of rated power 464 W 426 W
Typical summer roof 55 °C 89.5% of rated power 439 W 403 W
Hot roof 70 °C 84.2% of rated power 413 W 379 W
03

Full specification

Parameter E490HCM132-B E450HCM120-B Difference
Power and efficiency
Rated power 490 Wp 450 Wp +40 W for E490HCM132-B
Module efficiency 20.61 % 20.74 % Effectively the same
Power density 206.1 Wp/m² 207.4 Wp/m² Effectively the same
Open-circuit voltage 44.65 V 41.56 V 3.09 V apart
Voltage at max power 38.94 V 34.31 V 4.63 V apart
Short-circuit current 13.09 A 13.81 A 0.72 A apart
Current at max power 12.59 A 13.12 A 0.53 A apart
Temperature
Temperature coefficient -0.350 %/°C -0.350 %/°C Same
Mechanical
Dimensions 2097x1134x35 mm 1913x1134x35 mm 2097x1134x35 mm vs 1913x1134x35 mm
Module area 2.378 m² 2.169 m² 0.209 m² apart
Weight 25.0 kg 24.0 kg -1.0 kg for E450HCM120-B
Weight per kWp 51.0 kg/kWp 53.3 kg/kWp -2.3 kg/kWp for E490HCM132-B
Warranty and degradation
Product warranty 12 yrs 12 yrs Same
Performance warranty 25 yrs 25 yrs Same
Annual degradation 0.55 %/yr 0.55 %/yr Same
Technology
Cell technology PERC PERC Same
Cell type Monocrystalline Monocrystalline Same
Cell count 132 120 12 cells apart
Bifacial No No Same
04

Against the whole database

14,129 panels
Efficiency
#11,161 vs #10,723
E450HCM120-B leads by 438 places
Power density
#11,177 vs #10,697
E450HCM120-B leads by 480 places
Heat behaviour
#10,489 vs #10,489
Tied - the same position in the database
Weight
#4,383 vs #7,243
E490HCM132-B leads by 2,860 places
Warranty
#9,912 vs #9,912
Tied - the same position in the database
Overall
#10,460 vs #11,184
E490HCM132-B leads by 724 places
05

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06

Written summary

07

Questions about this pairing

Which panel is better: Emmvee E490HCM132-B or Emmvee E450HCM120-B?
According to our database: Emmvee E450HCM120-B has higher module efficiency (20.74% vs 20.61%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Emmvee E490HCM132-B and Emmvee E450HCM120-B?
Emmvee E490HCM132-B has a module efficiency of 20.61%, while Emmvee E450HCM120-B is 20.74%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Emmvee E490HCM132-B use vs Emmvee E450HCM120-B?
Emmvee E490HCM132-B uses PERC cells; Emmvee E450HCM120-B 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 Emmvee E490HCM132-B and Emmvee E450HCM120-B?
Emmvee E490HCM132-B has a 25 years power warranty; Emmvee E450HCM120-B has a 25 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.

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.