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480/LR vs 455/LR 15 of 19 identical Swap Change panels

JA Solar JAT54S41-480/LR vs JA Solar JAT54S41-455/LR

JA Solar JAT54S41-480/LR
JAT54S41-480/LR
480 Wp 24.00 % TOPCon
Open panel page Datasheet PDF
VS
JA Solar JAT54S41-455/LR
JAT54S41-455/LR
455 Wp 22.80 % TOPCon
Open panel page Datasheet PDF
The verdict

480/LR leads on the differences that matter

The largest is module efficiency: 1.20 pp more efficient. 15 of 19 comparable parameters are identical.

See all 4 differences
How alike are they
15 of 19 comparable
parameters are identical
identical differs
01

What actually differs

4 of 19 parameters
Parameter 480/LR 455/LR Difference
Module efficiency 24.00 % 22.80 % 1.20 pp more efficient
Power density 240.2 Wp/m² 227.7 Wp/m² 12.5 Wp/m² higher
Rated power 480 Wp 455 Wp 25 W more power
Weight per kWp 40.2 kg/kWp 42.4 kg/kWp 2.2 kg/kWp lighter
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
16,105 kWh
455/LR
15,266 kWh
Lifetime gap
839 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 480/LR 455/LR
Standard test conditions 25 °C 100.0% of rated power 480 W 455 W
Cool, bright day 40 °C 96.1% of rated power 461 W 437 W
Typical summer roof 55 °C 92.2% of rated power 443 W 420 W
Hot roof 70 °C 88.3% of rated power 424 W 402 W
03

Full specification

Parameter 480/LR 455/LR Difference
Power and efficiency
Rated power 480 Wp 455 Wp +25 W for 480/LR
Module efficiency 24.00 % 22.80 % +1.20 pp for 480/LR
Power density 240.2 Wp/m² 227.7 Wp/m² +12.5 Wp/m² for 480/LR
Open-circuit voltage 41.10 V 40.75 V Effectively the same
Voltage at max power 35.00 V 34.32 V Effectively the same
Short-circuit current 14.96 A 14.66 A Effectively the same
Current at max power 13.72 A 13.27 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 42.4 kg/kWp -2.2 kg/kWp for 480/LR
Warranty and degradation
Product warranty 25 yrs 25 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

Against the whole database

14,005 panels
Efficiency
#303 vs #2,714
480/LR leads by 2,411 places
Power density
#294 vs #2,888
480/LR leads by 2,594 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#161 vs #218
480/LR leads by 57 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#3,237 vs #5,448
480/LR leads by 2,211 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAT54S41-480/LR vs JA Solar JAT54S41-475/LR
One difference: module efficiency
Same series, other bin
JA Solar JAT54S41-480/LR vs JA Solar JAT54S41-470/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT54S41-480/LR vs JA Solar JAT54S41-465/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT54S41-480/LR vs JA Solar JAT54S41-460/LR
3 differences, the largest is module efficiency
Same manufacturer
JA Solar JAT54S41-480/LR vs JA Solar JAM66D46-740/LB
14 differences, the largest is rated power
Same manufacturer
JA Solar JAT54S41-480/LR vs JA Solar JAM66D46-735/LB
15 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAT54S41-480/LR or JA Solar JAT54S41-455/LR?
According to our database: JA Solar JAT54S41-480/LR has higher module efficiency (24.00% 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 JAT54S41-480/LR and JA Solar JAT54S41-455/LR?
JA Solar JAT54S41-480/LR has a module efficiency of 24.00%, while JA Solar JAT54S41-455/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 JAT54S41-480/LR use vs JA Solar JAT54S41-455/LR?
JA Solar JAT54S41-480/LR uses TOPCon cells; JA Solar JAT54S41-455/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 JAT54S41-480/LR and JA Solar JAT54S41-455/LR?
JA Solar JAT54S41-480/LR has a 30 years power warranty; JA Solar JAT54S41-455/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 340 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.