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JAM54D41-455/LR vs JAM54D40-475/LR 14 of 19 identical Swap Change panels

JA Solar JAM54D41-455/LR vs JA Solar JAM54D40-475/LR

JA Solar JAM54D41-455/LR
JAM54D41-455/LR
455 Wp 22.80 % TOPCon
Open panel page Datasheet PDF
VS
JA Solar JAM54D40-475/LR
JAM54D40-475/LR
475 Wp 23.80 % N-type
Open panel page Datasheet PDF
The verdict

JAM54D40-475/LR leads on the differences that matter

The largest is module efficiency: 1.00 pp more efficient. 14 of 19 comparable parameters are identical.

See all 5 differences
How alike are they
14 of 19 comparable
parameters are identical
identical differs
01

What actually differs

5 of 19 parameters
Parameter JAM54D41-455/LR JAM54D40-475/LR Difference
Module efficiency 22.80 % 23.80 % 1.00 pp more efficient
Power density 227.7 Wp/m² 237.7 Wp/m² 10.0 Wp/m² higher
Rated power 455 Wp 475 Wp 20 W more power
Cell technology TOPCon N-type TOPCon vs N-type
Weight per kWp 48.4 kg/kWp 46.3 kg/kWp 2.0 kg/kWp lighter
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
JAM54D40-475/LR
15,937 kWh
Lifetime gap
671 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM54D41-455/LR JAM54D40-475/LR
Standard test conditions 25 °C 100.0% of rated power 455 W 475 W
Cool, bright day 40 °C 95.7% of rated power 435 W 454 W
Typical summer roof 55 °C 91.3% of rated power 415 W 434 W
Hot roof 70 °C 87.0% of rated power 396 W 413 W
03

Full specification

Parameter JAM54D41-455/LR JAM54D40-475/LR Difference
Power and efficiency
Rated power 455 Wp 475 Wp +20 W for JAM54D40-475/LR
Module efficiency 22.80 % 23.80 % +1.00 pp for JAM54D40-475/LR
Power density 227.7 Wp/m² 237.7 Wp/m² +10.0 Wp/m² for JAM54D40-475/LR
Open-circuit voltage 40.50 V 40.55 V Effectively the same
Voltage at max power 33.33 V 34.18 V Effectively the same
Short-circuit current 14.42 A 14.67 A Effectively the same
Current at max power 13.65 A 13.90 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 46.3 kg/kWp -2.0 kg/kWp for JAM54D40-475/LR
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 #433
JAM54D40-475/LR leads by 2,281 places
Power density
#2,888 vs #467
JAM54D40-475/LR leads by 2,421 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#2,220 vs #1,117
JAM54D40-475/LR leads by 1,103 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#7,813 vs #5,786
JAM54D40-475/LR leads by 2,027 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 JAM54D40-475/LR vs JA Solar JAM54D40-470/LR
One difference: module efficiency
Same series, other bin
JA Solar JAM54D40-475/LR vs JA Solar JAM54D40-465/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-475/LR vs JA Solar JAM54S40-460/LR
7 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 JAM54D40-475/LR?
According to our database: JA Solar JAM54D40-475/LR has higher module efficiency (23.80% vs 22.80%). 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 JAM54D40-475/LR?
JA Solar JAM54D41-455/LR has a module efficiency of 22.80%, while JA Solar JAM54D40-475/LR is 23.80%. 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 JAM54D40-475/LR?
JA Solar JAM54D41-455/LR uses TOPCon cells; JA Solar JAM54D40-475/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 JAM54D40-475/LR?
JA Solar JAM54D41-455/LR has a 30 years power warranty; JA Solar JAM54D40-475/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.