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JAM54D40-455/LB vs JAM54D41-455/LB 18 of 19 identical Swap Change panels

JA Solar JAM54D40-455/LB vs JA Solar JAM54D41-455/LB

JA Solar JAM54D40-455/LB
JAM54D40-455/LB
455 Wp 22.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM54D41-455/LB
JAM54D41-455/LB
455 Wp 22.80 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

JAM54D41-455/LB leads on the differences that matter

The largest is product warranty: 3 yrs longer. 18 of 19 comparable parameters are identical.

See the one difference
How alike are they
18 of 19 comparable
parameters are identical
identical differs
01

What actually differs

1 of 19 parameters
Parameter JAM54D40-455/LB JAM54D41-455/LB Difference
Product warranty 12 yrs 15 yrs 3 yrs longer
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.
JAM54D40-455/LB
15,266 kWh
JAM54D41-455/LB
15,266 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM54D40-455/LB JAM54D41-455/LB
Standard test conditions 25 °C 100.0% of rated power 455 W 455 W
Cool, bright day 40 °C 95.7% of rated power 435 W 435 W
Typical summer roof 55 °C 91.3% of rated power 415 W 415 W
Hot roof 70 °C 87.0% of rated power 396 W 396 W
03

Full specification

Parameter JAM54D40-455/LB JAM54D41-455/LB Difference
Power and efficiency
Rated power 455 Wp 455 Wp Same
Module efficiency 22.80 % 22.80 % Same
Power density 227.7 Wp/m² 227.7 Wp/m² Same
Open-circuit voltage 39.50 V 39.50 V Same
Voltage at max power 33.00 V 32.83 V Effectively the same
Short-circuit current 14.56 A 14.95 A Effectively the same
Current at max power 13.79 A 13.99 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 48.4 kg/kWp Same
Warranty and degradation
Product warranty 12 yrs 15 yrs +3 yrs for JAM54D41-455/LB
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 Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#2,714 vs #2,714
Tied - the same position in the database
Power density
#2,888 vs #2,888
Tied - the same position in the database
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,220 vs #2,220
Tied - the same position in the database
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,516 vs #7,813
JAM54D41-455/LB leads by 703 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM54D40-455/LB vs JA Solar JAM54D40-475/LB
7 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-455/LB vs JA Solar JAM54D40-470/LB
5 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-455/LB vs JA Solar JAM54D40-465/LB
5 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-455/LB vs JA Solar JAM54D40-460/LB
One difference: module efficiency
Same series, other bin
JA Solar JAM54D40-455/LB vs JA Solar JAM54D41 455/LB
One difference: cell technology
Same series, other bin
JA Solar JAM54D40-455/LB vs JA Solar JAM54D40-450/LB
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM54D40-455/LB or JA Solar JAM54D41-455/LB?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM54D40-455/LB and JA Solar JAM54D41-455/LB?
JA Solar JAM54D40-455/LB has a module efficiency of 22.80%, while JA Solar JAM54D41-455/LB is 22.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54D40-455/LB use vs JA Solar JAM54D41-455/LB?
JA Solar JAM54D40-455/LB uses TOPCon cells; JA Solar JAM54D41-455/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 JAM54D40-455/LB and JA Solar JAM54D41-455/LB?
JA Solar JAM54D40-455/LB has a 30 years power warranty; JA Solar JAM54D41-455/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 JAM54D40-455/LB and JA Solar JAM54D41-455/LB bifacial panels?
Both JA Solar JAM54D40-455/LB and JA Solar JAM54D41-455/LB 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.

Shop prices: See 393 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.