JA Solar JAM54D41-445/LR vs JA Solar JAM54D41-455/LR
VS
The verdict
455/LR leads on the differences that matter
The largest is module efficiency: 0.50 pp more efficient. 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
445/LR
455/LR
Difference
Module efficiency
22.30 %
22.80 %
0.50 pp more efficient
Power density
222.7 Wp/m²
227.7 Wp/m²
5.0 Wp/m² higher
Rated power
445 Wp
455 Wp
10 W more power
Open-circuit voltage
39.10 V
40.50 V
1.40 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.
445/LR
14,931 kWh
455/LR
15,266 kWh
Lifetime gap
335 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
445/LR
455/LR
Standard test conditions
25 °C
100.0% of rated power
445 W
455 W
Cool, bright day
40 °C
95.7% of rated power
426 W
435 W
Typical summer roof
55 °C
91.3% of rated power
406 W
415 W
Hot roof
70 °C
87.0% of rated power
387 W
396 W
03
Full specification
Parameter
445/LR
455/LR
Difference
Power and efficiency
Rated power
445 Wp
455 Wp
+10 W for 455/LR
Module efficiency
22.30 %
22.80 %
+0.50 pp for 455/LR
Power density
222.7 Wp/m²
227.7 Wp/m²
+5.0 Wp/m² for 455/LR
Open-circuit voltage
39.10 V
40.50 V
1.40 V apart
Voltage at max power
32.65 V
33.33 V
Effectively the same
Short-circuit current
14.40 A
14.42 A
Effectively the same
Current at max power
13.63 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
49.4 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
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
108
108
Same
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#5,100
vs
#2,714
455/LR leads by 2,386 places
Power density
#5,302
vs
#2,888
455/LR leads by 2,414 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#2,959
vs
#2,220
455/LR leads by 739 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#8,801
vs
#7,813
455/LR leads by 988 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 JAM54D41-445/LR or JA Solar JAM54D41-455/LR?
According to our database: JA Solar JAM54D41-455/LR has higher module efficiency (22.80% vs 22.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM54D41-445/LR and JA Solar JAM54D41-455/LR?
JA Solar JAM54D41-445/LR has a module efficiency of 22.30%, 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 JAM54D41-445/LR use vs JA Solar JAM54D41-455/LR?
JA Solar JAM54D41-445/LR uses TOPCon 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 JAM54D41-445/LR and JA Solar JAM54D41-455/LR?
JA Solar JAM54D41-445/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 351 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.