JA Solar JAM54S40-460/LR vs JA Solar JAM54D40-455/LR
VS
The verdict
JAM54S40-460/LR leads on the differences that matter
The largest is weight per kwp: 4.9 kg/kWp lighter. 15 of 19 comparable parameters are identical.
See all 4 differencesHow alike are they
15
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
4 of 19 parameters
What actually differs
Parameter
JAM54S40-460/LR
JAM54D40-455/LR
Difference
Weight per kWp
43.5 kg/kWp
48.4 kg/kWp
4.9 kg/kWp lighter
Weight
20.0 kg
22.0 kg
2.0 kg lighter
Cell technology
TOPCon
N-type
TOPCon vs N-type
Module efficiency
23.00 %
22.80 %
0.20 pp more efficient
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.
JAM54S40-460/LR
15,434 kWh
JAM54D40-455/LR
15,266 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
JAM54S40-460/LR
JAM54D40-455/LR
Standard test conditions
25 °C
100.0% of rated power
460 W
455 W
Cool, bright day
40 °C
95.7% of rated power
440 W
435 W
Typical summer roof
55 °C
91.3% of rated power
420 W
415 W
Hot roof
70 °C
87.0% of rated power
400 W
396 W
03
Full specification
Parameter
JAM54S40-460/LR
JAM54D40-455/LR
Difference
Power and efficiency
Rated power
460 Wp
455 Wp
Effectively the same
Module efficiency
23.00 %
22.80 %
+0.20 pp for JAM54S40-460/LR
Power density
230.2 Wp/m²
227.7 Wp/m²
Effectively the same
Open-circuit voltage
39.70 V
39.50 V
Effectively the same
Voltage at max power
33.17 V
33.00 V
Effectively the same
Short-circuit current
14.64 A
14.56 A
Effectively the same
Current at max power
13.87 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
20.0 kg
22.0 kg
-2.0 kg for JAM54S40-460/LR
Weight per kWp
43.5 kg/kWp
48.4 kg/kWp
-4.9 kg/kWp for JAM54S40-460/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
14,005 panels
Against the whole database
Efficiency
#1,919
vs
#2,714
JAM54S40-460/LR leads by 795 places
Power density
#1,876
vs
#2,888
JAM54S40-460/LR leads by 1,012 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#300
vs
#2,220
JAM54S40-460/LR leads by 1,920 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#7,250
vs
#7,813
JAM54S40-460/LR leads by 563 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: JA Solar JAM54S40-460/LR or JA Solar JAM54D40-455/LR?
According to our database: JA Solar JAM54S40-460/LR has higher module efficiency (23.00% 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 JAM54S40-460/LR and JA Solar JAM54D40-455/LR?
JA Solar JAM54S40-460/LR has a module efficiency of 23.00%, 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 JAM54S40-460/LR use vs JA Solar JAM54D40-455/LR?
JA Solar JAM54S40-460/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 JAM54S40-460/LR and JA Solar JAM54D40-455/LR?
JA Solar JAM54S40-460/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.