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JAM54D40-455/LB vs JAM54D41 LB 450W 15 of 19 identical Swap Change panels

JA Solar JAM54D40-455/LB vs JA Solar JAM54D41 LB 450W

JA Solar JAM54D40-455/LB
JAM54D40-455/LB
455 Wp 22.80 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
JA Solar JAM54D41 LB 450W
JAM54D41 LB 450W
450 Wp 22.50 % N-type Bifacial
Open panel page Datasheet PDF
The verdict

4 differences, and they point both ways

The largest is product warranty: 13 yrs longer. 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 JAM54D40-455/LB JAM54D41 LB 450W Difference
Product warranty 12 yrs 25 yrs 13 yrs longer
Module efficiency 22.80 % 22.50 % 0.30 pp more efficient
Temperature coefficient -0.290 %/°C -0.300 %/°C 0.010 %/°C better in heat
Cell technology TOPCon N-type TOPCon vs N-type
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
JAM54D40-455/LB
15,266 kWh
JAM54D41 LB 450W
15,098 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM54D40-455/LB JAM54D41 LB 450W
Standard test conditions 25 °C 100.0% of rated power 455 W 450 W
Cool, bright day 40 °C 95.5% of rated power 435 W 430 W
Typical summer roof 55 °C 91.0% of rated power 415 W 410 W
Hot roof 70 °C 86.5% of rated power 396 W 389 W
03

Full specification

Parameter JAM54D40-455/LB JAM54D41 LB 450W Difference
Power and efficiency
Rated power 455 Wp 450 Wp Effectively the same
Module efficiency 22.80 % 22.50 % +0.30 pp for JAM54D40-455/LB
Power density 227.7 Wp/m² 225.2 Wp/m² Effectively the same
Open-circuit voltage 39.50 V 39.30 V Effectively the same
Voltage at max power 33.00 V 32.82 V Effectively the same
Short-circuit current 14.56 A 14.48 A Effectively the same
Current at max power 13.79 A 13.71 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.300 %/°C +0.010 %/°C for JAM54D40-455/LB
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 48.4 kg/kWp 48.9 kg/kWp Effectively the same
Warranty and degradation
Product warranty 12 yrs 25 yrs +13 yrs for JAM54D41 LB 450W
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/yr Same
Technology
Cell technology TOPCon N-type TOPCon vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 108 108 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#2,714 vs #4,222
JAM54D40-455/LB leads by 1,508 places
Power density
#2,888 vs #4,225
JAM54D40-455/LB leads by 1,337 places
Heat behaviour
#2,165 vs #6,093
JAM54D40-455/LB leads by 3,928 places
Weight
#2,220 vs #2,563
JAM54D40-455/LB leads by 343 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,516 vs #6,097
JAM54D41 LB 450W leads by 2,419 places
05

More useful comparisons

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

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM54D40-455/LB or JA Solar JAM54D41 LB 450W?
According to our database: JA Solar JAM54D40-455/LB has higher module efficiency (22.80% vs 22.50%); JA Solar JAM54D40-455/LB tolerates heat better (temp coeff -0.290%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM54D40-455/LB and JA Solar JAM54D41 LB 450W?
JA Solar JAM54D40-455/LB has a module efficiency of 22.80%, while JA Solar JAM54D41 LB 450 W is 22.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM54D40-455/LB use vs JA Solar JAM54D41 LB 450W?
JA Solar JAM54D40-455/LB uses TOPCon cells; JA Solar JAM54D41 LB 450 W 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 JAM54D40-455/LB and JA Solar JAM54D41 LB 450W?
JA Solar JAM54D40-455/LB has a 30 years power warranty; JA Solar JAM54D41 LB 450 W 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 JAM54D40-455/LB and JA Solar JAM54D41 LB 450W bifacial panels?
Both JA Solar JAM54D40-455/LB and JA Solar JAM54D41 LB 450 W 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 386 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.