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JAM60D41-510/LB vs LR7-54HVB-480M 2 of 18 identical Swap Change panels

JA Solar JAM60D41-510/LB vs Longi Solar LR7-54HVB-480M

JAM60D41-510/LB
510 Wp 23.00 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Longi Solar LR7-54HVB-480M
LR7-54HVB-480M
480 Wp 23.50 % N-type
Open panel page Datasheet PDF
The verdict

LR7-54HVB-480M leads on the differences that matter

The largest is temperature coefficient: 0.030 %/°C better in heat. 2 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 16 differences
How alike are they
2 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

16 of 18 parameters
Parameter JAM60D41-510/LB LR7-54HVB-480M Difference
Temperature coefficient -0.290 %/°C -0.260 %/°C 0.030 %/°C better in heat
Module efficiency 23.00 % 23.50 % 0.50 pp more efficient
Rated power 510 Wp 480 Wp 30 W more power
Weight 27.3 kg 21.6 kg 5.7 kg lighter
Weight per kWp 53.5 kg/kWp 45.0 kg/kWp 8.5 kg/kWp lighter
Module area 2.215 m² 2.041 m² 0.174 m² apart
Open-circuit voltage 44.25 V 40.29 V 3.96 V apart
Power density 230.3 Wp/m² 235.2 Wp/m² 4.9 Wp/m² higher
Cell technology TOPCon N-type TOPCon vs N-type
Annual degradation 0.40 %/yr 0.35 %/yr 0.05 %/yr slower
Voltage at max power 37.31 V 33.28 V 4.03 V apart
Cell count 120 108 12 cells apart
Bifacial Yes No Yes vs No
Short-circuit current 14.54 A 15.13 A 0.59 A apart
Dimensions 1953x1134x30 mm 1800x1134x30 mm 1953x1134x30 mm vs 1800x1134x30 mm
Current at max power 13.67 A 14.43 A 0.76 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
JAM60D41-510/LB
17,112 kWh
LR7-54HVB-480M
16,230 kWh
Lifetime gap
882 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario JAM60D41-510/LB LR7-54HVB-480M
Standard test conditions 25 °C 100.0% of rated power 510 W 480 W
Cool, bright day 40 °C 95.7% of rated power 488 W 461 W
Typical summer roof 55 °C 91.3% of rated power 466 W 443 W
Hot roof 70 °C 87.0% of rated power 443 W 424 W
03

Full specification

Parameter JAM60D41-510/LB LR7-54HVB-480M Difference
Power and efficiency
Rated power 510 Wp 480 Wp +30 W for JAM60D41-510/LB
Module efficiency 23.00 % 23.50 % +0.50 pp for LR7-54HVB-480M
Power density 230.3 Wp/m² 235.2 Wp/m² +4.9 Wp/m² for LR7-54HVB-480M
Open-circuit voltage 44.25 V 40.29 V 3.96 V apart
Voltage at max power 37.31 V 33.28 V 4.03 V apart
Short-circuit current 14.54 A 15.13 A 0.59 A apart
Current at max power 13.67 A 14.43 A 0.76 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.260 %/°C +0.030 %/°C for LR7-54HVB-480M
Mechanical
Dimensions 1953x1134x30 mm 1800x1134x30 mm 1953x1134x30 mm vs 1800x1134x30 mm
Module area 2.215 m² 2.041 m² 0.174 m² apart
Weight 27.3 kg 21.6 kg -5.7 kg for LR7-54HVB-480M
Weight per kWp 53.5 kg/kWp 45.0 kg/kWp -8.5 kg/kWp for LR7-54HVB-480M
Warranty and degradation
Product warranty 12 yrs - Not published by Longi Solar
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.35 %/yr -0.05 %/yr for LR7-54HVB-480M
Technology
Cell technology TOPCon N-type TOPCon vs N-type
Cell type Monocrystalline Monocrystalline Same
Cell count 120 108 12 cells apart
Bifacial Yes No Yes vs No
04

Against the whole database

14,005 panels
Efficiency
#1,919 vs #716
LR7-54HVB-480M leads by 1,203 places
Power density
#1,849 vs #718
LR7-54HVB-480M leads by 1,131 places
Heat behaviour
#2,165 vs #511
LR7-54HVB-480M leads by 1,654 places
Weight
#7,509 vs #598
LR7-54HVB-480M leads by 6,911 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,280 vs #9,198
JAM60D41-510/LB leads by 2,918 places
05

More useful comparisons

Open the full database
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JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-625/LB
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JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-620/LB
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JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-615/LB
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JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-610/LB
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Same series, other bin
JA Solar JAM60D41-510/LB vs JA Solar JAM66D45-605/LB
11 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: JA Solar JAM60D41-510/LB or Longi Solar LR7-54HVB-480M?
According to our database: Longi Solar LR7-54HVB-480M has higher module efficiency (23.50% vs 23.00%); Longi Solar LR7-54HVB-480M tolerates heat better (temp coeff -0.260%/°C vs -0.290%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of JA Solar JAM60D41-510/LB and Longi Solar LR7-54HVB-480M?
JA Solar JAM60D41-510/LB has a module efficiency of 23.00%, while Longi Solar LR7-54HVB-480M is 23.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does JA Solar JAM60D41-510/LB use vs Longi Solar LR7-54HVB-480M?
JA Solar JAM60D41-510/LB uses TOPCon cells; Longi Solar LR7-54HVB-480M 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 JAM60D41-510/LB and Longi Solar LR7-54HVB-480M?
JA Solar JAM60D41-510/LB has a 30 years power warranty; Longi Solar LR7-54HVB-480M 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 JAM60D41-510/LB and Longi Solar LR7-54HVB-480M bifacial panels?
JA Solar JAM60D41-510/LB is bifacial (captures light from both faces); Longi Solar LR7-54HVB-480M is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Compare JA Solar and Longi Solar as manufacturers Portfolio, efficiency, cell technologies and warranty terms

Shop prices: See 391 JA Solar offers · See 174 Longi 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.