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JAT60S41-515/LR vs JAT60S40-540/LR 14 of 19 identical Swap Change panels

JA Solar JAT60S41-515/LR vs JA Solar JAT60S40-540/LR

JA Solar JAT60S41-515/LR
JAT60S41-515/LR
515 Wp 23.30 % N-type
Open panel page Datasheet PDF
VS
JA Solar JAT60S40-540/LR
JAT60S40-540/LR
540 Wp 24.40 % N-type
Open panel page Datasheet PDF
The verdict

JAT60S40-540/LR leads on the differences that matter

The largest is module efficiency: 1.10 pp more efficient. 14 of 19 comparable parameters are identical.

See all 5 differences
How alike are they
14 of 19 comparable
parameters are identical
identical differs
01

What actually differs

5 of 19 parameters
Parameter JAT60S41-515/LR JAT60S40-540/LR Difference
Module efficiency 23.30 % 24.40 % 1.10 pp more efficient
Power density 232.5 Wp/m² 243.8 Wp/m² 11.3 Wp/m² higher
Product warranty 25 yrs 15 yrs 10 yrs longer
Rated power 515 Wp 540 Wp 25 W more power
Weight per kWp 45.6 kg/kWp 43.5 kg/kWp 2.1 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.
JAT60S41-515/LR
17,414 kWh
JAT60S40-540/LR
18,259 kWh
Lifetime gap
845 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAT60S41-515/LR JAT60S40-540/LR
Standard test conditions 25 °C 100.0% of rated power 515 W 540 W
Cool, bright day 40 °C 96.1% of rated power 495 W 519 W
Typical summer roof 55 °C 92.2% of rated power 475 W 498 W
Hot roof 70 °C 88.3% of rated power 455 W 477 W
03

Full specification

Parameter JAT60S41-515/LR JAT60S40-540/LR Difference
Power and efficiency
Rated power 515 Wp 540 Wp +25 W for JAT60S40-540/LR
Module efficiency 23.30 % 24.40 % +1.10 pp for JAT60S40-540/LR
Power density 232.5 Wp/m² 243.8 Wp/m² +11.3 Wp/m² for JAT60S40-540/LR
Open-circuit voltage 45.48 V 45.78 V Effectively the same
Voltage at max power 38.56 V 39.11 V Effectively the same
Short-circuit current 14.72 A 15.02 A Effectively the same
Current at max power 13.36 A 13.81 A Effectively the same
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 1953x1134x30 mm 1953x1134x30 mm Same
Module area 2.215 m² 2.215 m² Same
Weight 23.5 kg 23.5 kg Same
Weight per kWp 45.6 kg/kWp 43.5 kg/kWp -2.1 kg/kWp for JAT60S40-540/LR
Warranty and degradation
Product warranty 25 yrs 15 yrs +10 yrs for JAT60S41-515/LR
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.35 %/yr 0.35 %/yr Same
Technology
Cell technology N-type N-type Same
Cell type Monocrystalline Monocrystalline Same
Cell count 120 120 Same
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#1,017 vs #99
JAT60S40-540/LR leads by 918 places
Power density
#1,220 vs #127
JAT60S40-540/LR leads by 1,093 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#789 vs #306
JAT60S40-540/LR leads by 483 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,940 vs #2,868
JAT60S40-540/LR leads by 72 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAT60S41-515/LR vs JA Solar JAT60S40-535/LR
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT60S41-515/LR vs JA Solar JAT60S41-530/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT60S41-515/LR vs JA Solar JAT60S40-530/LR
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT60S41-515/LR vs JA Solar JAT60S41-525/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT60S41-515/LR vs JA Solar JAT60S40-525/LR
4 differences, the largest is product warranty
Same series, other bin
JA Solar JAT60S41-515/LR vs JA Solar JAT60S41-520/LR
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAT60S41-515/LR or JA Solar JAT60S40-540/LR?
According to our database: JA Solar JAT60S40-540/LR has higher module efficiency (24.40% vs 23.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAT60S41-515/LR and JA Solar JAT60S40-540/LR?
JA Solar JAT60S41-515/LR has a module efficiency of 23.30%, while JA Solar JAT60S40-540/LR is 24.40%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAT60S41-515/LR use vs JA Solar JAT60S40-540/LR?
JA Solar JAT60S41-515/LR uses N-type cells; JA Solar JAT60S40-540/LR uses N-type. 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 JAT60S41-515/LR and JA Solar JAT60S40-540/LR?
JA Solar JAT60S41-515/LR has a 30 years power warranty; JA Solar JAT60S40-540/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 348 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.