JA Solar JAT54S40-480/LR vs JA Solar JAT54S40-475/LR
VS
The verdict
480/LR leads on the differences that matter
The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.
See the one differenceHow alike are they
18
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
1 of 19 parameters
What actually differs
Parameter
480/LR
475/LR
Difference
Module efficiency
24.00 %
23.80 %
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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
480/LR
15,729 kWh
475/LR
15,565 kWh
Lifetime gap
164 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
480/LR
475/LR
Standard test conditions
25 °C
100.0% of rated power
480 W
475 W
Cool, bright day
40 °C
96.1% of rated power
461 W
456 W
Typical summer roof
55 °C
92.2% of rated power
443 W
438 W
Hot roof
70 °C
88.3% of rated power
424 W
419 W
03
Full specification
Parameter
480/LR
475/LR
Difference
Power and efficiency
Rated power
480 Wp
475 Wp
Effectively the same
Module efficiency
24.00 %
23.80 %
+0.20 pp for 480/LR
Power density
240.2 Wp/m²
237.7 Wp/m²
Effectively the same
Open-circuit voltage
41.10 V
41.03 V
Effectively the same
Voltage at max power
35.00 V
34.87 V
Effectively the same
Short-circuit current
14.96 A
14.90 A
Effectively the same
Current at max power
13.72 A
13.63 A
Effectively the same
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
1762x1134x30 mm
1762x1134x30 mm
Same
Module area
1.998 m²
1.998 m²
Same
Weight
19.3 kg
19.3 kg
Same
Weight per kWp
40.2 kg/kWp
40.6 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.55 %/yr
0.55 %/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
#303
vs
#433
480/LR leads by 130 places
Power density
#294
vs
#467
480/LR leads by 173 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#161
vs
#165
480/LR leads by 4 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#5,245
vs
#5,636
480/LR leads by 391 places
05
Open the full database
More useful comparisons
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06
Written summary
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07
Questions about this pairing
Which panel is better: JA Solar JAT54S40-480/LR or JA Solar JAT54S40-475/LR?
According to our database: JA Solar JAT54S40-480/LR has higher module efficiency (24.00% vs 23.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAT54S40-480/LR and JA Solar JAT54S40-475/LR?
JA Solar JAT54S40-480/LR has a module efficiency of 24.00%, while JA Solar JAT54S40-475/LR is 23.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAT54S40-480/LR use vs JA Solar JAT54S40-475/LR?
JA Solar JAT54S40-480/LR uses TOPCon cells; JA Solar JAT54S40-475/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 JAT54S40-480/LR and JA Solar JAT54S40-475/LR?
JA Solar JAT54S40-480/LR has a 30 years power warranty; JA Solar JAT54S40-475/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.