JA Solar JAM54D41-445/LB vs JA Solar JAM54D40-460/LB
VS
The verdict
JAM54D40-460/LB leads on the differences that matter
The largest is module efficiency: 0.70 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
JAM54D41-445/LB
JAM54D40-460/LB
Difference
Module efficiency
22.30 %
23.00 %
0.70 pp more efficient
Power density
222.7 Wp/m²
230.2 Wp/m²
7.5 Wp/m² higher
Product warranty
15 yrs
12 yrs
3 yrs longer
Rated power
445 Wp
460 Wp
15 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.
JAM54D41-445/LB
14,931 kWh
JAM54D40-460/LB
15,434 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
JAM54D41-445/LB
JAM54D40-460/LB
Standard test conditions
25 °C
100.0% of rated power
445 W
460 W
Cool, bright day
40 °C
95.7% of rated power
426 W
440 W
Typical summer roof
55 °C
91.3% of rated power
406 W
420 W
Hot roof
70 °C
87.0% of rated power
387 W
400 W
03
Full specification
Parameter
JAM54D41-445/LB
JAM54D40-460/LB
Difference
Power and efficiency
Rated power
445 Wp
460 Wp
+15 W for JAM54D40-460/LB
Module efficiency
22.30 %
23.00 %
+0.70 pp for JAM54D40-460/LB
Power density
222.7 Wp/m²
230.2 Wp/m²
+7.5 Wp/m² for JAM54D40-460/LB
Open-circuit voltage
39.10 V
39.70 V
Effectively the same
Voltage at max power
32.47 V
33.17 V
Effectively the same
Short-circuit current
14.50 A
14.64 A
Effectively the same
Current at max power
13.75 A
13.87 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
47.8 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
12 yrs
+3 yrs for JAM54D41-445/LB
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
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#5,100
vs
#1,919
JAM54D40-460/LB leads by 3,181 places
Power density
#5,302
vs
#1,876
JAM54D40-460/LB leads by 3,426 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#2,959
vs
#1,924
JAM54D40-460/LB leads by 1,035 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#8,801
vs
#8,053
JAM54D40-460/LB leads by 748 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/LB or JA Solar JAM54D40-460/LB?
According to our database: JA Solar JAM54D40-460/LB has higher module efficiency (23.00% 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/LB and JA Solar JAM54D40-460/LB?
JA Solar JAM54D41-445/LB has a module efficiency of 22.30%, while JA Solar JAM54D40-460/LB is 23.00%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54D41-445/LB use vs JA Solar JAM54D40-460/LB?
JA Solar JAM54D41-445/LB uses TOPCon cells; JA Solar JAM54D40-460/LB 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/LB and JA Solar JAM54D40-460/LB?
JA Solar JAM54D41-445/LB has a 30 years power warranty; JA Solar JAM54D40-460/LB 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.
Are JA Solar JAM54D41-445/LB and JA Solar JAM54D40-460/LB bifacial panels?
Both JA Solar JAM54D41-445/LB and JA Solar JAM54D40-460/LB are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.
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.