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JAM54D41-455/LR vs JAM54D40-455/LR 17 of 19 identical Swap Change panels

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

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

2 differences, none of them an advantage

The largest is cell technology: TOPCon vs N-type. 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 JAM54D41-455/LR JAM54D40-455/LR Difference
Cell technology TOPCon N-type TOPCon vs N-type
Open-circuit voltage 40.50 V 39.50 V 1.00 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.
JAM54D41-455/LR
15,266 kWh
JAM54D40-455/LR
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/LR JAM54D40-455/LR
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/LR JAM54D40-455/LR 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 40.50 V 39.50 V 1.00 V apart
Voltage at max power 33.33 V 33.00 V Effectively the same
Short-circuit current 14.42 A 14.56 A Effectively the same
Current at max power 13.65 A 13.79 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 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 N-type TOPCon vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 108 108 Same
Bifacial No No 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
#7,813 vs #7,813
Tied - the same position in the database
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 JAM54D40-455/LR vs JA Solar JAM54D40-475/LR
6 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-455/LR vs JA Solar JAM54D40-470/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-455/LR vs JA Solar JAM54D40-465/LR
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 JAM54D40-455/LR?
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/LR and JA Solar JAM54D40-455/LR?
JA Solar JAM54D41-455/LR has a module efficiency of 22.80%, while JA Solar JAM54D40-455/LR 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/LR use vs JA Solar JAM54D40-455/LR?
JA Solar JAM54D41-455/LR uses TOPCon cells; JA Solar JAM54D40-455/LR uses N-type. 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 JAM54D40-455/LR?
JA Solar JAM54D41-455/LR has a 30 years power warranty; JA Solar JAM54D40-455/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 389 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.