JA Solar JAM54D40-460/LB vs JA Solar JAM54D40-475/LB
VS
The verdict
475/LB leads on the differences that matter
The largest is module efficiency: 0.80 pp more efficient. 14 of 19 comparable parameters are identical.
See all 5 differencesHow alike are they
14
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
5 of 19 parameters
What actually differs
Parameter
460/LB
475/LB
Difference
Module efficiency
23.00 %
23.80 %
0.80 pp more efficient
Power density
230.2 Wp/m²
237.7 Wp/m²
7.5 Wp/m² higher
Product warranty
12 yrs
15 yrs
3 yrs longer
Short-circuit current
14.64 A
16.19 A
1.55 A apart
Rated power
460 Wp
475 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.
460/LB
15,434 kWh
475/LB
15,937 kWh
Lifetime gap
503 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
460/LB
475/LB
Standard test conditions
25 °C
100.0% of rated power
460 W
475 W
Cool, bright day
40 °C
95.7% of rated power
440 W
454 W
Typical summer roof
55 °C
91.3% of rated power
420 W
434 W
Hot roof
70 °C
87.0% of rated power
400 W
413 W
03
Full specification
Parameter
460/LB
475/LB
Difference
Power and efficiency
Rated power
460 Wp
475 Wp
+15 W for 475/LB
Module efficiency
23.00 %
23.80 %
+0.80 pp for 475/LB
Power density
230.2 Wp/m²
237.7 Wp/m²
+7.5 Wp/m² for 475/LB
Open-circuit voltage
39.70 V
40.55 V
Effectively the same
Voltage at max power
33.17 V
33.68 V
Effectively the same
Short-circuit current
14.64 A
16.19 A
1.55 A apart
Current at max power
13.87 A
14.11 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
47.8 kg/kWp
46.3 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
15 yrs
+3 yrs for 475/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
#1,919
vs
#433
475/LB leads by 1,486 places
Power density
#1,876
vs
#467
475/LB leads by 1,409 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#1,924
vs
#1,117
475/LB leads by 807 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#8,053
vs
#5,786
475/LB leads by 2,267 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 JAM54D40-460/LB or JA Solar JAM54D40-475/LB?
According to our database: JA Solar JAM54D40-475/LB has higher module efficiency (23.80% vs 23.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM54D40-460/LB and JA Solar JAM54D40-475/LB?
JA Solar JAM54D40-460/LB has a module efficiency of 23.00%, while JA Solar JAM54D40-475/LB is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54D40-460/LB use vs JA Solar JAM54D40-475/LB?
JA Solar JAM54D40-460/LB uses TOPCon cells; JA Solar JAM54D40-475/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 JAM54D40-460/LB and JA Solar JAM54D40-475/LB?
JA Solar JAM54D40-460/LB has a 30 years power warranty; JA Solar JAM54D40-475/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 JAM54D40-460/LB and JA Solar JAM54D40-475/LB bifacial panels?
Both JA Solar JAM54D40-460/LB and JA Solar JAM54D40-475/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 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.