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

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

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

One difference, none of them an advantage

The largest is cell technology: N-type vs TOPCon. 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 JAM54D41 455/LB JAM54D40-455/LB Difference
Cell technology N-type TOPCon N-type vs TOPCon
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.
JAM54D41 455/LB
15,266 kWh
JAM54D40-455/LB
15,266 kWh
Lifetime gap
No difference
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM54D41 455/LB JAM54D40-455/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 JAM54D41 455/LB JAM54D40-455/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 33.00 V Same
Short-circuit current 14.56 A 14.56 A Same
Current at max power 13.79 A 13.79 A 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 12 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology N-type TOPCon N-type vs TOPCon
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 #8,516
Tied - the same position in the database
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM54D41 455/LB vs JA Solar JAM54D40-475/LB
8 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D41 455/LB vs JA Solar JAM54D40-470/LB
6 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D41 455/LB vs JA Solar JAM54D40-465/LB
6 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D41 455/LB vs JA Solar JAM54D40-460/LB
2 differences, the largest is cell technology
Same series, other bin
JA Solar JAM54D41 455/LB vs JA Solar JAM54D41-455/LB
2 differences, the largest is product warranty
Same series, other bin
JA Solar JAM54D41 455/LB vs JA Solar JAM54D40-450/LB
2 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM54D41 455/LB or JA Solar JAM54D40-455/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 JAM54D41 455/LB and JA Solar JAM54D40-455/LB?
JA Solar JAM54D41 455/LB has a module efficiency of 22.80%, while JA Solar JAM54D40-455/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 JAM54D41 455/LB use vs JA Solar JAM54D40-455/LB?
JA Solar JAM54D41 455/LB uses N-type cells; JA Solar JAM54D40-455/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 JAM54D41 455/LB and JA Solar JAM54D40-455/LB?
JA Solar JAM54D41 455/LB has a 30 years power warranty; JA Solar JAM54D40-455/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 JAM54D41 455/LB and JA Solar JAM54D40-455/LB bifacial panels?
Both JA Solar JAM54D41 455/LB and JA Solar JAM54D40-455/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 340 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.