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JAT54S40-475/LR vs JAT54S41-475/LR 17 of 19 identical Swap Change panels

JA Solar JAT54S40-475/LR vs JA Solar JAT54S41-475/LR

JA Solar JAT54S40-475/LR
JAT54S40-475/LR
475 Wp 23.80 % TOPCon
Open panel page Datasheet PDF
VS
JA Solar JAT54S41-475/LR
JAT54S41-475/LR
475 Wp 23.80 % TOPCon
Open panel page Datasheet PDF
The verdict

JAT54S41-475/LR leads on the differences that matter

The largest is annual degradation: 0.15 %/yr slower. 17 of 19 comparable parameters are identical.

See all 2 differences
How alike are they
17 of 19 comparable
parameters are identical
identical differs
01

What actually differs

2 of 19 parameters
Parameter JAT54S40-475/LR JAT54S41-475/LR Difference
Annual degradation 0.55 %/yr 0.40 %/yr 0.15 %/yr slower
Product warranty 15 yrs 25 yrs 10 yrs longer
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.
JAT54S40-475/LR
15,565 kWh
JAT54S41-475/LR
15,937 kWh
Lifetime gap
372 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAT54S40-475/LR JAT54S41-475/LR
Standard test conditions 25 °C 100.0% of rated power 475 W 475 W
Cool, bright day 40 °C 96.1% of rated power 456 W 456 W
Typical summer roof 55 °C 92.2% of rated power 438 W 438 W
Hot roof 70 °C 88.3% of rated power 419 W 419 W
03

Full specification

Parameter JAT54S40-475/LR JAT54S41-475/LR Difference
Power and efficiency
Rated power 475 Wp 475 Wp Same
Module efficiency 23.80 % 23.80 % Same
Power density 237.7 Wp/m² 237.7 Wp/m² Same
Open-circuit voltage 41.03 V 41.03 V Same
Voltage at max power 34.87 V 34.87 V Same
Short-circuit current 14.90 A 14.90 A Same
Current at max power 13.63 A 13.63 A 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 40.6 kg/kWp 40.6 kg/kWp Same
Warranty and degradation
Product warranty 15 yrs 25 yrs +10 yrs for JAT54S41-475/LR
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.55 %/yr 0.40 %/yr -0.15 %/yr for JAT54S41-475/LR
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
#433 vs #433
Tied - the same position in the database
Power density
#467 vs #467
Tied - the same position in the database
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#165 vs #165
Tied - the same position in the database
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#5,636 vs #3,637
JAT54S41-475/LR leads by 1,999 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAT54S40-475/LR vs JA Solar JAT54S40-485/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT54S40-475/LR vs JA Solar JAT54S40-480/LR
One difference: module efficiency
Same series, other bin
JA Solar JAT54S40-475/LR vs JA Solar JAT54S41-480/LR
3 differences, the largest is annual degradation
Same series, other bin
JA Solar JAT54S40-475/LR vs JA Solar JAT54S40-470/LR
One difference: module efficiency
Same series, other bin
JA Solar JAT54S40-475/LR vs JA Solar JAT54S41-470/LR
3 differences, the largest is annual degradation
Same series, other bin
JA Solar JAT54S40-475/LR vs JA Solar JAT54S40-465/LR
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAT54S40-475/LR or JA Solar JAT54S41-475/LR?
According to our database: both panels are closely matched on key specs - the decision often comes down to price and local availability. See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAT54S40-475/LR and JA Solar JAT54S41-475/LR?
JA Solar JAT54S40-475/LR has a module efficiency of 23.80%, while JA Solar JAT54S41-475/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 JAT54S40-475/LR use vs JA Solar JAT54S41-475/LR?
JA Solar JAT54S40-475/LR uses TOPCon cells; JA Solar JAT54S41-475/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 JAT54S40-475/LR and JA Solar JAT54S41-475/LR?
JA Solar JAT54S40-475/LR has a 30 years power warranty; JA Solar JAT54S41-475/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.