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JAM54D40-465/LR vs JAM54S40-455/LR 13 of 19 identical Swap Change panels

JA Solar JAM54D40-465/LR vs JA Solar JAM54S40-455/LR

JA Solar JAM54D40-465/LR
JAM54D40-465/LR
465 Wp 23.30 % N-type
Open panel page Datasheet PDF
VS
JA Solar JAM54S40-455/LR
JAM54S40-455/LR
455 Wp 22.80 % TOPCon
Open panel page Datasheet PDF
The verdict

JAM54D40-465/LR leads on the differences that matter

The largest is module efficiency: 0.50 pp more efficient. 13 of 19 comparable parameters are identical.

See all 6 differences
How alike are they
13 of 19 comparable
parameters are identical
identical differs
01

What actually differs

6 of 19 parameters
Parameter JAM54D40-465/LR JAM54S40-455/LR Difference
Module efficiency 23.30 % 22.80 % 0.50 pp more efficient
Power density 232.7 Wp/m² 227.7 Wp/m² 5.0 Wp/m² higher
Weight 22.0 kg 20.0 kg 2.0 kg lighter
Weight per kWp 47.3 kg/kWp 44.0 kg/kWp 3.4 kg/kWp lighter
Cell technology N-type TOPCon N-type vs TOPCon
Rated power 465 Wp 455 Wp 10 W more power
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.
JAM54D40-465/LR
15,602 kWh
JAM54S40-455/LR
15,266 kWh
Lifetime gap
336 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM54D40-465/LR JAM54S40-455/LR
Standard test conditions 25 °C 100.0% of rated power 465 W 455 W
Cool, bright day 40 °C 95.7% of rated power 445 W 435 W
Typical summer roof 55 °C 91.3% of rated power 425 W 415 W
Hot roof 70 °C 87.0% of rated power 404 W 396 W
03

Full specification

Parameter JAM54D40-465/LR JAM54S40-455/LR Difference
Power and efficiency
Rated power 465 Wp 455 Wp +10 W for JAM54D40-465/LR
Module efficiency 23.30 % 22.80 % +0.50 pp for JAM54D40-465/LR
Power density 232.7 Wp/m² 227.7 Wp/m² +5.0 Wp/m² for JAM54D40-465/LR
Open-circuit voltage 40.20 V 39.50 V Effectively the same
Voltage at max power 33.50 V 33.00 V Effectively the same
Short-circuit current 14.65 A 14.56 A Effectively the same
Current at max power 13.88 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 20.0 kg -2.0 kg for JAM54S40-455/LR
Weight per kWp 47.3 kg/kWp 44.0 kg/kWp -3.4 kg/kWp for JAM54S40-455/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 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
#1,017 vs #2,714
JAM54D40-465/LR leads by 1,697 places
Power density
#1,115 vs #2,888
JAM54D40-465/LR leads by 1,773 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#1,632 vs #365
JAM54S40-455/LR leads by 1,267 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,780 vs #7,691
JAM54D40-465/LR leads by 911 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM54D40-465/LR vs JA Solar JAM54D40-475/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-465/LR vs JA Solar JAM54D40-470/LR
One difference: module efficiency
Same series, other bin
JA Solar JAM54D40-465/LR vs JA Solar JAM54S40-460/LR
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-465/LR vs JA Solar JAM54D40-460/LR
One difference: module efficiency
Same series, other bin
JA Solar JAM54D40-465/LR vs JA Solar JAM54D41-455/LR
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-465/LR vs JA Solar JAM54D40-455/LR
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM54D40-465/LR or JA Solar JAM54S40-455/LR?
According to our database: JA Solar JAM54D40-465/LR has higher module efficiency (23.30% 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 JAM54D40-465/LR and JA Solar JAM54S40-455/LR?
JA Solar JAM54D40-465/LR has a module efficiency of 23.30%, while JA Solar JAM54S40-455/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 JAM54D40-465/LR use vs JA Solar JAM54S40-455/LR?
JA Solar JAM54D40-465/LR uses N-type cells; JA Solar JAM54S40-455/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 JAM54D40-465/LR and JA Solar JAM54S40-455/LR?
JA Solar JAM54D40-465/LR has a 30 years power warranty; JA Solar JAM54S40-455/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 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.