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JAT54S41-470/LR vs JAT54S40-485/LR 14 of 19 identical Swap Change panels

JA Solar JAT54S41-470/LR vs JA Solar JAT54S40-485/LR

JA Solar JAT54S41-470/LR
JAT54S41-470/LR
470 Wp 23.50 % TOPCon
Open panel page Datasheet PDF
VS
JA Solar JAT54S40-485/LR
JAT54S40-485/LR
485 Wp 24.30 % TOPCon
Open panel page Datasheet PDF
The verdict

JAT54S40-485/LR 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 differences
How alike are they
14 of 19 comparable
parameters are identical
identical differs
01

What actually differs

5 of 19 parameters
Parameter JAT54S41-470/LR JAT54S40-485/LR Difference
Module efficiency 23.50 % 24.30 % 0.80 pp more efficient
Annual degradation 0.40 %/yr 0.55 %/yr 0.15 %/yr slower
Product warranty 25 yrs 15 yrs 10 yrs longer
Power density 235.2 Wp/m² 242.7 Wp/m² 7.5 Wp/m² higher
Rated power 470 Wp 485 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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
JAT54S41-470/LR
15,769 kWh
JAT54S40-485/LR
15,893 kWh
Lifetime gap
124 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAT54S41-470/LR JAT54S40-485/LR
Standard test conditions 25 °C 100.0% of rated power 470 W 485 W
Cool, bright day 40 °C 96.1% of rated power 452 W 466 W
Typical summer roof 55 °C 92.2% of rated power 433 W 447 W
Hot roof 70 °C 88.3% of rated power 415 W 428 W
03

Full specification

Parameter JAT54S41-470/LR JAT54S40-485/LR Difference
Power and efficiency
Rated power 470 Wp 485 Wp +15 W for JAT54S40-485/LR
Module efficiency 23.50 % 24.30 % +0.80 pp for JAT54S40-485/LR
Power density 235.2 Wp/m² 242.7 Wp/m² +7.5 Wp/m² for JAT54S40-485/LR
Open-circuit voltage 40.96 V 41.17 V Effectively the same
Voltage at max power 34.74 V 35.13 V Effectively the same
Short-circuit current 14.84 A 15.02 A Effectively the same
Current at max power 13.54 A 13.81 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 41.1 kg/kWp 39.8 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 15 yrs +10 yrs for JAT54S41-470/LR
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.55 %/yr -0.15 %/yr for JAT54S41-470/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
#716 vs #131
JAT54S40-485/LR leads by 585 places
Power density
#674 vs #140
JAT54S40-485/LR leads by 534 places
Heat behaviour
#511 vs #511
Tied - the same position in the database
Weight
#170 vs #158
JAT54S40-485/LR leads by 12 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,126 vs #4,770
JAT54S41-470/LR leads by 644 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAT54S41-470/LR vs JA Solar JAT54S41-480/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT54S41-470/LR vs JA Solar JAT54S41-475/LR
One difference: module efficiency
Same series, other bin
JA Solar JAT54S41-470/LR vs JA Solar JAT54S41-465/LR
One difference: module efficiency
Same series, other bin
JA Solar JAT54S41-470/LR vs JA Solar JAT54S41-460/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT54S41-470/LR vs JA Solar JAT54S41-455/LR
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAT54S40-485/LR vs JA Solar JAT54S40-480/LR
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAT54S41-470/LR or JA Solar JAT54S40-485/LR?
According to our database: JA Solar JAT54S40-485/LR has higher module efficiency (24.30% vs 23.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAT54S41-470/LR and JA Solar JAT54S40-485/LR?
JA Solar JAT54S41-470/LR has a module efficiency of 23.50%, while JA Solar JAT54S40-485/LR is 24.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAT54S41-470/LR use vs JA Solar JAT54S40-485/LR?
JA Solar JAT54S41-470/LR uses TOPCon cells; JA Solar JAT54S40-485/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 JAT54S41-470/LR and JA Solar JAT54S40-485/LR?
JA Solar JAT54S41-470/LR has a 30 years power warranty; JA Solar JAT54S40-485/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.