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

Emmvee E450HCM120-B vs Emmvee E490HCM132-B

Emmvee
E450HCM120-B
450 Wp 20.74 % PERC
Open panel page Datasheet PDF
VS
Emmvee
E490HCM132-B
490 Wp 20.61 % 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 E450HCM120-B E490HCM132-B Difference
Rated power 450 Wp 490 Wp 40 W more power
Module area 2.169 m² 2.378 m² 0.209 m² apart
Open-circuit voltage 41.56 V 44.65 V 3.09 V apart
Voltage at max power 34.31 V 38.94 V 4.63 V apart
Cell count 120 132 12 cells apart
Weight per kWp 53.3 kg/kWp 51.0 kg/kWp 2.3 kg/kWp lighter
Weight 24.0 kg 25.0 kg 1.0 kg lighter
Short-circuit current 13.81 A 13.09 A 0.72 A apart
Dimensions 1913x1134x35 mm 2097x1134x35 mm 1913x1134x35 mm vs 2097x1134x35 mm
Current at max power 13.12 A 12.59 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.
E450HCM120-B
14,584 kWh
E490HCM132-B
15,880 kWh
Lifetime gap
1,296 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario E450HCM120-B E490HCM132-B
Standard test conditions 25 °C 100.0% of rated power 450 W 490 W
Cool, bright day 40 °C 94.8% of rated power 426 W 464 W
Typical summer roof 55 °C 89.5% of rated power 403 W 439 W
Hot roof 70 °C 84.2% of rated power 379 W 413 W
03

Full specification

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

Against the whole database

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

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06

Written summary

07

Questions about this pairing

Which panel is better: Emmvee E450HCM120-B or Emmvee E490HCM132-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 E450HCM120-B and Emmvee E490HCM132-B?
Emmvee E450HCM120-B has a module efficiency of 20.74%, while Emmvee E490HCM132-B is 20.61%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Emmvee E450HCM120-B use vs Emmvee E490HCM132-B?
Emmvee E450HCM120-B uses PERC cells; Emmvee E490HCM132-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 E450HCM120-B and Emmvee E490HCM132-B?
Emmvee E450HCM120-B has a 25 years power warranty; Emmvee E490HCM132-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.