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JAM54D40-450/LR vs JAM54D41-455/LR 16 of 19 identical Swap Change panels

JA Solar JAM54D40-450/LR vs JA Solar JAM54D41-455/LR

JA Solar JAM54D40-450/LR
JAM54D40-450/LR
450 Wp 22.50 % N-type
Open panel page Datasheet PDF
VS
JA Solar JAM54D41-455/LR
JAM54D41-455/LR
455 Wp 22.80 % TOPCon
Open panel page Datasheet PDF
The verdict

JAM54D41-455/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 JAM54D40-450/LR JAM54D41-455/LR Difference
Module efficiency 22.50 % 22.80 % 0.30 pp more efficient
Cell technology N-type TOPCon N-type vs TOPCon
Open-circuit voltage 39.30 V 40.50 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.
JAM54D40-450/LR
15,098 kWh
JAM54D41-455/LR
15,266 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM54D40-450/LR JAM54D41-455/LR
Standard test conditions 25 °C 100.0% of rated power 450 W 455 W
Cool, bright day 40 °C 95.7% of rated power 430 W 435 W
Typical summer roof 55 °C 91.3% of rated power 411 W 415 W
Hot roof 70 °C 87.0% of rated power 391 W 396 W
03

Full specification

Parameter JAM54D40-450/LR JAM54D41-455/LR Difference
Power and efficiency
Rated power 450 Wp 455 Wp Effectively the same
Module efficiency 22.50 % 22.80 % +0.30 pp for JAM54D41-455/LR
Power density 225.2 Wp/m² 227.7 Wp/m² Effectively the same
Open-circuit voltage 39.30 V 40.50 V 1.20 V apart
Voltage at max power 32.82 V 33.33 V Effectively the same
Short-circuit current 14.48 A 14.42 A Effectively the same
Current at max power 13.71 A 13.65 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 48.4 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 N-type TOPCon N-type vs TOPCon
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 #2,714
JAM54D41-455/LR leads by 1,508 places
Power density
#4,225 vs #2,888
JAM54D41-455/LR leads by 1,337 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,563 vs #2,220
JAM54D41-455/LR leads by 343 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,397 vs #7,813
JAM54D41-455/LR leads by 584 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM54D40-450/LR vs JA Solar JAM54D40-475/LR
6 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-450/LR vs JA Solar JAM54D40-470/LR
6 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-450/LR vs JA Solar JAM54D40-465/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-450/LR vs JA Solar JAM54S40-460/LR
6 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-450/LR vs JA Solar JAM54D40-460/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-450/LR vs JA Solar JAM54S40-455/LR
4 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM54D40-450/LR or JA Solar JAM54D41-455/LR?
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 JAM54D40-450/LR and JA Solar JAM54D41-455/LR?
JA Solar JAM54D40-450/LR has a module efficiency of 22.50%, while JA Solar JAM54D41-455/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 JAM54D40-450/LR use vs JA Solar JAM54D41-455/LR?
JA Solar JAM54D40-450/LR uses N-type cells; JA Solar JAM54D41-455/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 JAM54D40-450/LR and JA Solar JAM54D41-455/LR?
JA Solar JAM54D40-450/LR has a 30 years power warranty; JA Solar JAM54D41-455/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.