LB 450W vs 455/LB 16 of 19 identical Swap Change panels

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

Q: Which panel is better: JA Solar JAM54D41 LB 450W or JA Solar JAM54D41 455/LB?

According to our database: JA Solar JAM54D41 455/LB has higher module efficiency (22.80% vs 22.50%); JA Solar JAM54D41 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.

Q: What is the efficiency of JA Solar JAM54D41 LB 450W and JA Solar JAM54D41 455/LB?

JA Solar JAM54D41 LB 450W has a module efficiency of 22.50%, while JA Solar JAM54D41 455/LB is 22.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does JA Solar JAM54D41 LB 450W use vs JA Solar JAM54D41 455/LB?

JA Solar JAM54D41 LB 450W uses N-type cells; JA Solar JAM54D41 455/LB uses N-type. Modern n-type technologies (TOPCon, HJT, BC) typically deliver higher efficiency and lower degradation compared to older PERC (p-type) cells.

Q: What is the warranty on JA Solar JAM54D41 LB 450W and JA Solar JAM54D41 455/LB?

JA Solar JAM54D41 LB 450W has a 30 years power warranty; JA Solar JAM54D41 455/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.

Q: Are JA Solar JAM54D41 LB 450W and JA Solar JAM54D41 455/LB bifacial panels?

Both JA Solar JAM54D41 LB 450W and JA Solar JAM54D41 455/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.

JAM54D41 LB 450W

450 Wp 22.50 % N-type Bifacial

Open panel page Datasheet PDF

JAM54D41 455/LB

455 Wp 22.80 % N-type Bifacial

Open panel page Datasheet PDF

The verdict

3 differences, and they point both ways

The largest is product warranty: 13 yrs longer. 16 of 19 comparable parameters are identical.

See all 3 differences

How alike are they

16 of 19 comparable
parameters are identical

identical differs

What actually differs

3 of 19 parameters

Parameter LB 450W 455/LB Difference

Product warranty 25 yrs 12 yrs 13 yrs longer

Module efficiency 22.50 % 22.80 % 0.30 pp more efficient

Temperature coefficient -0.300 %/°C -0.290 %/°C 0.010 %/°C better in heat

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

LB 450W

15,098 kWh

455/LB

15,266 kWh

Lifetime gap

168 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario LB 450W 455/LB

Standard test conditions 25 °C 100.0% of rated power 450 W 455 W

Cool, bright day 40 °C 95.5% of rated power 430 W 435 W

Typical summer roof 55 °C 91.0% of rated power 410 W 415 W

Hot roof 70 °C 86.5% of rated power 389 W 396 W

Full specification

Parameter LB 450W 455/LB Difference

Power and efficiency

Rated power 450 Wp 455 Wp Effectively the same

Module efficiency 22.50 % 22.80 % +0.30 pp for 455/LB

Power density 225.2 Wp/m² 227.7 Wp/m² Effectively the same

Open-circuit voltage 39.30 V 39.50 V Effectively the same

Voltage at max power 32.82 V 33.00 V Effectively the same

Short-circuit current 14.48 A 14.56 A Effectively the same

Current at max power 13.71 A 13.79 A Effectively the same

Temperature

Temperature coefficient -0.300 %/°C -0.290 %/°C +0.010 %/°C for 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 48.9 kg/kWp 48.4 kg/kWp Effectively the same

Warranty and degradation

Product warranty 25 yrs 12 yrs +13 yrs for LB 450W

Performance warranty 30 yrs 30 yrs Same

Annual degradation 0.40 %/yr 0.40 %/yr Same

Technology

Cell technology N-type N-type Same

Cell type Monocrystalline Monocrystalline Same

Cell count 108 108 Same

Bifacial Yes Yes Same

Against the whole database

14,005 panels

Efficiency

#4,222 vs #2,714

455/LB leads by 1,508 places

Power density

#4,225 vs #2,888

455/LB leads by 1,337 places

Heat behaviour

#6,093 vs #2,165

455/LB leads by 3,928 places

Weight

#2,563 vs #2,220

455/LB leads by 343 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#6,097 vs #8,516

LB 450W leads by 2,419 places

More useful comparisons

Open the full database

Same series, other bin

JA Solar JAM54D41 LB 450W vs JA Solar JAM54D40-475/LB

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JA Solar JAM54D41 LB 450W vs JA Solar JAM54D40-470/LB

8 differences, the largest is module efficiency

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JA Solar JAM54D41 LB 450W vs JA Solar JAM54D40-465/LB

7 differences, the largest is module efficiency

Same series, other bin

JA Solar JAM54D41 LB 450W vs JA Solar JAM54D40-460/LB

6 differences, the largest is module efficiency

Same series, other bin

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

4 differences, the largest is product warranty

Same series, other bin

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

4 differences, the largest is product warranty

Written summary

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Questions about this pairing

Which panel is better: JA Solar JAM54D41 LB 450W or JA Solar JAM54D41 455/LB?

According to our database: JA Solar JAM54D41 455/LB has higher module efficiency (22.80% vs 22.50%); JA Solar JAM54D41 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 JAM54D41 LB 450W and JA Solar JAM54D41 455/LB?

JA Solar JAM54D41 LB 450 W has a module efficiency of 22.50%, while JA Solar JAM54D41 455/LB is 22.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

What cell technology does JA Solar JAM54D41 LB 450W use vs JA Solar JAM54D41 455/LB?

JA Solar JAM54D41 LB 450 W uses N-type cells; JA Solar JAM54D41 455/LB 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 JAM54D41 LB 450W and JA Solar JAM54D41 455/LB?

JA Solar JAM54D41 LB 450 W has a 30 years power warranty; JA Solar JAM54D41 455/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 JAM54D41 LB 450W and JA Solar JAM54D41 455/LB bifacial panels?

Both JA Solar JAM54D41 LB 450 W and JA Solar JAM54D41 455/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 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.