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450/LR vs 445/LR 17 of 19 identical Swap Change panels

JA Solar JAM54D41-450/LR vs JA Solar JAM54D41-445/LR

JA Solar JAM54D41-450/LR
JAM54D41-450/LR
450 Wp 22.50 % TOPCon
Open panel page Datasheet PDF
VS
JA Solar JAM54D41-445/LR
JAM54D41-445/LR
445 Wp 22.30 % TOPCon
Open panel page Datasheet PDF
The verdict

450/LR leads on the differences that matter

The largest is module efficiency: 0.20 pp more efficient. 17 of 19 comparable parameters are identical.

See all 2 differences
How alike are they
17 of 19 comparable
parameters are identical
identical differs
01

What actually differs

2 of 19 parameters
Parameter 450/LR 445/LR Difference
Module efficiency 22.50 % 22.30 % 0.20 pp more efficient
Open-circuit voltage 40.30 V 39.10 V 1.20 V 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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
450/LR
15,098 kWh
445/LR
14,931 kWh
Lifetime gap
167 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 450/LR 445/LR
Standard test conditions 25 °C 100.0% of rated power 450 W 445 W
Cool, bright day 40 °C 95.7% of rated power 430 W 426 W
Typical summer roof 55 °C 91.3% of rated power 411 W 406 W
Hot roof 70 °C 87.0% of rated power 391 W 387 W
03

Full specification

Parameter 450/LR 445/LR Difference
Power and efficiency
Rated power 450 Wp 445 Wp Effectively the same
Module efficiency 22.50 % 22.30 % +0.20 pp for 450/LR
Power density 225.2 Wp/m² 222.7 Wp/m² Effectively the same
Open-circuit voltage 40.30 V 39.10 V 1.20 V apart
Voltage at max power 32.99 V 32.65 V Effectively the same
Short-circuit current 14.41 A 14.40 A Effectively the same
Current at max power 13.64 A 13.63 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1762x1134x30 mm Same
Module area 1.998 m² 1.998 m² Same
Weight 22.0 kg 22.0 kg Same
Weight per kWp 48.9 kg/kWp 49.4 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 108 108 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#4,222 vs #5,100
450/LR leads by 878 places
Power density
#4,225 vs #5,302
450/LR leads by 1,077 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,563 vs #2,959
450/LR leads by 396 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,397 vs #8,801
450/LR leads by 404 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM54D41-450/LR vs JA Solar JAM54D41-455/LR
One difference: module efficiency
Same series, other bin
JA Solar JAM54D41-450/LR vs JA Solar JAM54D41-440/LR
4 differences, the largest is module efficiency
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JA Solar JAM54D41-450/LR vs JA Solar JAM66D46-740/LB
14 differences, the largest is module efficiency
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JA Solar JAM54D41-450/LR vs JA Solar JAM66D46-735/LB
14 differences, the largest is module efficiency
Same manufacturer
JA Solar JAM54D41-450/LR vs JA Solar JAM66D46-730/LB
14 differences, the largest is module efficiency
Same manufacturer
JA Solar JAM54D41-450/LR vs JA Solar JAM66D46-725/LB
14 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM54D41-450/LR or JA Solar JAM54D41-445/LR?
According to our database: JA Solar JAM54D41-450/LR has higher module efficiency (22.50% vs 22.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM54D41-450/LR and JA Solar JAM54D41-445/LR?
JA Solar JAM54D41-450/LR has a module efficiency of 22.50%, while JA Solar JAM54D41-445/LR is 22.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54D41-450/LR use vs JA Solar JAM54D41-445/LR?
JA Solar JAM54D41-450/LR uses TOPCon cells; JA Solar JAM54D41-445/LR uses TOPCon. 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 JA Solar JAM54D41-450/LR and JA Solar JAM54D41-445/LR?
JA Solar JAM54D41-450/LR has a 30 years power warranty; JA Solar JAM54D41-445/LR 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 351 JA Solar 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.