Longi Solar LR7-72HVDF-665M vs Longi Solar LR7-54HJBB-500M
VS
The verdict
54HJBB-500M leads on the differences that matter
The largest is rated power: 165 W more power. 9 of 19 comparable parameters are identical.
See all 10 differencesHow alike are they
9
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
10 of 19 parameters
What actually differs
Parameter
72HVDF-665M
54HJBB-500M
Difference
Rated power
665 Wp
500 Wp
165 W more power
Weight
33.5 kg
23.5 kg
10.0 kg lighter
Product warranty
15 yrs
30 yrs
15 yrs longer
Temperature coefficient
-0.260 %/°C
-0.240 %/°C
0.020 %/°C better in heat
Open-circuit voltage
54.52 V
41.45 V
13.07 V apart
Module area
2.701 m²
2.041 m²
0.660 m² apart
Weight per kWp
50.4 kg/kWp
47.0 kg/kWp
3.4 kg/kWp lighter
Voltage at max power
45.17 V
34.27 V
10.90 V apart
Cell count
144
108
36 cells apart
Dimensions
2382x1134x30 mm
1800x1134x30 mm
2382x1134x30 mm vs 1800x1134x30 mm
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
72HVDF-665M
22,486 kWh
54HJBB-500M
16,907 kWh
Lifetime gap
5,579 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
72HVDF-665M
54HJBB-500M
Standard test conditions
25 °C
100.0% of rated power
665 W
500 W
Cool, bright day
40 °C
96.1% of rated power
639 W
482 W
Typical summer roof
55 °C
92.2% of rated power
613 W
464 W
Hot roof
70 °C
88.3% of rated power
587 W
446 W
03
Full specification
Parameter
72HVDF-665M
54HJBB-500M
Difference
Power and efficiency
Rated power
665 Wp
500 Wp
+165 W for 72HVDF-665M
Module efficiency
24.60 %
24.50 %
Effectively the same
Power density
246.2 Wp/m²
245.0 Wp/m²
Effectively the same
Open-circuit voltage
54.52 V
41.45 V
13.07 V apart
Voltage at max power
45.17 V
34.27 V
10.90 V apart
Short-circuit current
15.35 A
15.26 A
Effectively the same
Current at max power
14.72 A
14.59 A
Effectively the same
Temperature
Temperature coefficient
-0.260 %/°C
-0.240 %/°C
+0.020 %/°C for 54HJBB-500M
Mechanical
Dimensions
2382x1134x30 mm
1800x1134x30 mm
2382x1134x30 mm vs 1800x1134x30 mm
Module area
2.701 m²
2.041 m²
0.660 m² apart
Weight
33.5 kg
23.5 kg
-10.0 kg for 54HJBB-500M
Weight per kWp
50.4 kg/kWp
47.0 kg/kWp
-3.4 kg/kWp for 54HJBB-500M
Warranty and degradation
Product warranty
15 yrs
30 yrs
+15 yrs for 54HJBB-500M
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.35 %/yr
0.35 %/yr
Same
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
108
36 cells apart
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#51
vs
#74
72HVDF-665M leads by 23 places
Power density
#42
vs
#77
72HVDF-665M leads by 35 places
Heat behaviour
#511
vs
#13
54HJBB-500M leads by 498 places
Weight
#3,742
vs
#1,450
54HJBB-500M leads by 2,292 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#414
vs
#1,611
72HVDF-665M leads by 1,197 places
05
Open the full database
More useful comparisons
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Longi Solar LR7-54HJBB-500M vs Longi Solar LR7-54HJBB-505M
One difference: module efficiency
06
Written summary
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07
Questions about this pairing
Which panel is better: Longi Solar LR7-72HVDF-665M or Longi Solar LR7-54HJBB-500M?
According to our database: Longi Solar LR7-72HVDF-665M has higher module efficiency (24.60% vs 24.50%); Longi Solar LR7-54HJBB-500M tolerates heat better (temp coeff -0.240%/°C vs -0.260%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR7-72HVDF-665M and Longi Solar LR7-54HJBB-500M?
Longi Solar LR7-72HVDF-665M has a module efficiency of 24.60%, while Longi Solar LR7-54HJBB-500M is 24.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR7-72HVDF-665M use vs Longi Solar LR7-54HJBB-500M?
Longi Solar LR7-72HVDF-665M uses N-type cells; Longi Solar LR7-54HJBB-500M 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 Longi Solar LR7-72HVDF-665M and Longi Solar LR7-54HJBB-500M?
Longi Solar LR7-72HVDF-665M has a 30 years power warranty; Longi Solar LR7-54HJBB-500M 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 Longi Solar LR7-72HVDF-665M and Longi Solar LR7-54HJBB-500M bifacial panels?
Both Longi Solar LR7-72HVDF-665M and Longi Solar LR7-54HJBB-500M 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 172 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.