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JAM54D40-465/LB vs JAM54D41-445/LB 14 of 19 identical Swap Change panels

JA Solar JAM54D40-465/LB vs JA Solar JAM54D41-445/LB

JA Solar JAM54D40-465/LB
JAM54D40-465/LB
465 Wp 23.30 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM54D41-445/LB
JAM54D41-445/LB
445 Wp 22.30 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

JAM54D40-465/LB leads on the differences that matter

The largest is module efficiency: 1.00 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 JAM54D40-465/LB JAM54D41-445/LB Difference
Module efficiency 23.30 % 22.30 % 1.00 pp more efficient
Power density 232.7 Wp/m² 222.7 Wp/m² 10.0 Wp/m² higher
Rated power 465 Wp 445 Wp 20 W more power
Weight per kWp 47.3 kg/kWp 49.4 kg/kWp 2.1 kg/kWp lighter
Short-circuit current 15.07 A 14.50 A 0.57 A apart
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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
JAM54D40-465/LB
15,602 kWh
JAM54D41-445/LB
14,931 kWh
Lifetime gap
671 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM54D40-465/LB JAM54D41-445/LB
Standard test conditions 25 °C 100.0% of rated power 465 W 445 W
Cool, bright day 40 °C 95.7% of rated power 445 W 426 W
Typical summer roof 55 °C 91.3% of rated power 425 W 406 W
Hot roof 70 °C 87.0% of rated power 404 W 387 W
03

Full specification

Parameter JAM54D40-465/LB JAM54D41-445/LB Difference
Power and efficiency
Rated power 465 Wp 445 Wp +20 W for JAM54D40-465/LB
Module efficiency 23.30 % 22.30 % +1.00 pp for JAM54D40-465/LB
Power density 232.7 Wp/m² 222.7 Wp/m² +10.0 Wp/m² for JAM54D40-465/LB
Open-circuit voltage 39.70 V 39.10 V Effectively the same
Voltage at max power 33.33 V 32.47 V Effectively the same
Short-circuit current 15.07 A 14.50 A 0.57 A apart
Current at max power 13.95 A 13.75 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1762x1134x30 mm Same
Module area 1.998 m² 1.998 m² Same
Weight 22.0 kg 22.0 kg Same
Weight per kWp 47.3 kg/kWp 49.4 kg/kWp -2.1 kg/kWp for JAM54D40-465/LB
Warranty and degradation
Product warranty 15 yrs 15 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 Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#1,017 vs #5,100
JAM54D40-465/LB leads by 4,083 places
Power density
#1,115 vs #5,302
JAM54D40-465/LB leads by 4,187 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#1,632 vs #2,959
JAM54D40-465/LB leads by 1,327 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,780 vs #8,801
JAM54D40-465/LB leads by 2,021 places
05

More useful comparisons

Open the full database
Same series, other bin
JA Solar JAM54D40-465/LB vs JA Solar JAM54D40-475/LB
4 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-465/LB vs JA Solar JAM54D40-470/LB
One difference: module efficiency
Same series, other bin
JA Solar JAM54D40-465/LB vs JA Solar JAM54D40-460/LB
2 differences, the largest is product warranty
Same series, other bin
JA Solar JAM54D40-465/LB vs JA Solar JAM54D40-455/LB
5 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-465/LB vs JA Solar JAM54D41-455/LB
3 differences, the largest is module efficiency
Same series, other bin
JA Solar JAM54D40-465/LB vs JA Solar JAM54D41 455/LB
6 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM54D40-465/LB or JA Solar JAM54D41-445/LB?
According to our database: JA Solar JAM54D40-465/LB has higher module efficiency (23.30% vs 22.30%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM54D40-465/LB and JA Solar JAM54D41-445/LB?
JA Solar JAM54D40-465/LB has a module efficiency of 23.30%, while JA Solar JAM54D41-445/LB is 22.30%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54D40-465/LB use vs JA Solar JAM54D41-445/LB?
JA Solar JAM54D40-465/LB uses TOPCon cells; JA Solar JAM54D41-445/LB 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 JAM54D40-465/LB and JA Solar JAM54D41-445/LB?
JA Solar JAM54D40-465/LB has a 30 years power warranty; JA Solar JAM54D41-445/LB 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.
Are JA Solar JAM54D40-465/LB and JA Solar JAM54D41-445/LB bifacial panels?
Both JA Solar JAM54D40-465/LB and JA Solar JAM54D41-445/LB are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.

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.