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455/LR vs 450/LB 16 of 19 identical Swap Change panels

JA Solar JAM54D41-455/LR vs JA Solar JAM54D41-450/LB

JA Solar JAM54D41-455/LR
JAM54D41-455/LR
455 Wp 22.80 % TOPCon
Open panel page Datasheet PDF
VS
JA Solar JAM54D41-450/LB
JAM54D41-450/LB
450 Wp 22.50 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

455/LR leads on the differences that matter

The largest is module efficiency: 0.30 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 455/LR 450/LB Difference
Module efficiency 22.80 % 22.50 % 0.30 pp more efficient
Bifacial No Yes No vs Yes
Open-circuit voltage 40.50 V 39.30 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.
455/LR
15,266 kWh
450/LB
15,098 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 455/LR 450/LB
Standard test conditions 25 °C 100.0% of rated power 455 W 450 W
Cool, bright day 40 °C 95.7% of rated power 435 W 430 W
Typical summer roof 55 °C 91.3% of rated power 415 W 411 W
Hot roof 70 °C 87.0% of rated power 396 W 391 W
03

Full specification

Parameter 455/LR 450/LB Difference
Power and efficiency
Rated power 455 Wp 450 Wp Effectively the same
Module efficiency 22.80 % 22.50 % +0.30 pp for 455/LR
Power density 227.7 Wp/m² 225.2 Wp/m² Effectively the same
Open-circuit voltage 40.50 V 39.30 V 1.20 V apart
Voltage at max power 33.33 V 32.65 V Effectively the same
Short-circuit current 14.42 A 14.58 A Effectively the same
Current at max power 13.65 A 13.87 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 48.4 kg/kWp 48.9 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 Yes No vs Yes
04

Against the whole database

14,005 panels
Efficiency
#2,714 vs #4,222
455/LR leads by 1,508 places
Power density
#2,888 vs #4,225
455/LR leads by 1,337 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,220 vs #2,563
455/LR leads by 343 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,813 vs #8,397
455/LR leads by 584 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM54D41-455/LR vs JA Solar JAM54D41-450/LR
One difference: module efficiency
Same series, other bin
JA Solar JAM54D41-455/LR vs JA Solar JAM54D41-445/LR
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D41-455/LR vs JA Solar JAM54D41-440/LR
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D41-450/LB vs JA Solar JAM54D40-475/LB
7 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D41-450/LB vs JA Solar JAM54D40-470/LB
5 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D41-450/LB vs JA Solar JAM54D40-465/LB
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM54D41-455/LR or JA Solar JAM54D41-450/LB?
According to our database: JA Solar JAM54D41-455/LR has higher module efficiency (22.80% vs 22.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM54D41-455/LR and JA Solar JAM54D41-450/LB?
JA Solar JAM54D41-455/LR has a module efficiency of 22.80%, while JA Solar JAM54D41-450/LB is 22.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54D41-455/LR use vs JA Solar JAM54D41-450/LB?
JA Solar JAM54D41-455/LR uses TOPCon cells; JA Solar JAM54D41-450/LB 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 JAM54D41-455/LR and JA Solar JAM54D41-450/LB?
JA Solar JAM54D41-455/LR has a 30 years power warranty; JA Solar JAM54D41-450/LB 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 JA Solar JAM54D41-455/LR and JA Solar JAM54D41-450/LB bifacial panels?
JA Solar JAM54D41-450/LB is bifacial (captures light from both faces); JA Solar JAM54D41-455/LR is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.

Shop prices: See 384 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.