Longi Solar LR7-54HTH-455M vs Longi Solar LR7-72HVDF-665M
VS
The verdict
72HVDF-665M leads on the differences that matter
The largest is module efficiency: 2.30 pp more efficient. 3 of 19 comparable parameters are identical.
See all 16 differencesHow alike are they
3
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
16 of 19 parameters
What actually differs
Parameter
54HTH-455M
72HVDF-665M
Difference
Module efficiency
22.30 %
24.60 %
2.30 pp more efficient
Rated power
455 Wp
665 Wp
210 W more power
Power density
222.9 Wp/m²
246.2 Wp/m²
23.3 Wp/m² higher
Performance warranty
25 yrs
30 yrs
5 yrs longer
Weight
21.6 kg
33.5 kg
11.9 kg lighter
Temperature coefficient
-0.280 %/°C
-0.260 %/°C
0.020 %/°C better in heat
Open-circuit voltage
39.15 V
54.52 V
15.37 V apart
Module area
2.041 m²
2.701 m²
0.660 m² apart
Weight per kWp
47.5 kg/kWp
50.4 kg/kWp
2.9 kg/kWp lighter
Annual degradation
0.40 %/yr
0.35 %/yr
0.05 %/yr slower
Voltage at max power
32.98 V
45.17 V
12.19 V apart
Cell count
108
144
36 cells apart
Bifacial
No
Yes
No vs Yes
Short-circuit current
14.79 A
15.35 A
0.56 A apart
Dimensions
1800x1134x30 mm
2382x1134x30 mm
1800x1134x30 mm vs 2382x1134x30 mm
Current at max power
13.80 A
14.72 A
0.92 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
54HTH-455M
15,266 kWh
72HVDF-665M
22,486 kWh
Lifetime gap
7,220 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
54HTH-455M
72HVDF-665M
Standard test conditions
25 °C
100.0% of rated power
455 W
665 W
Cool, bright day
40 °C
95.8% of rated power
436 W
639 W
Typical summer roof
55 °C
91.6% of rated power
417 W
613 W
Hot roof
70 °C
87.4% of rated power
398 W
587 W
03
Full specification
Parameter
54HTH-455M
72HVDF-665M
Difference
Power and efficiency
Rated power
455 Wp
665 Wp
+210 W for 72HVDF-665M
Module efficiency
22.30 %
24.60 %
+2.30 pp for 72HVDF-665M
Power density
222.9 Wp/m²
246.2 Wp/m²
+23.3 Wp/m² for 72HVDF-665M
Open-circuit voltage
39.15 V
54.52 V
15.37 V apart
Voltage at max power
32.98 V
45.17 V
12.19 V apart
Short-circuit current
14.79 A
15.35 A
0.56 A apart
Current at max power
13.80 A
14.72 A
0.92 A apart
Temperature
Temperature coefficient
-0.280 %/°C
-0.260 %/°C
+0.020 %/°C for 72HVDF-665M
Mechanical
Dimensions
1800x1134x30 mm
2382x1134x30 mm
1800x1134x30 mm vs 2382x1134x30 mm
Module area
2.041 m²
2.701 m²
0.660 m² apart
Weight
21.6 kg
33.5 kg
-11.9 kg for 54HTH-455M
Weight per kWp
47.5 kg/kWp
50.4 kg/kWp
-2.9 kg/kWp for 54HTH-455M
Warranty and degradation
Product warranty
15 yrs
15 yrs
Same
Performance warranty
25 yrs
30 yrs
+5 yrs for 72HVDF-665M
Annual degradation
0.40 %/yr
0.35 %/yr
-0.05 %/yr for 72HVDF-665M
Technology
Cell technology
N-type
N-type
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
108
144
36 cells apart
Bifacial
No
Yes
No vs Yes
04
14,005 panels
Against the whole database
Efficiency
#5,100
vs
#51
72HVDF-665M leads by 5,049 places
Power density
#5,100
vs
#42
72HVDF-665M leads by 5,058 places
Heat behaviour
#1,309
vs
#511
72HVDF-665M leads by 798 places
Weight
#1,700
vs
#3,742
54HTH-455M leads by 2,042 places
Warranty
#9,798
vs
#21
72HVDF-665M leads by 9,777 places
Overall
#9,419
vs
#414
72HVDF-665M leads by 9,005 places
05
Open the full database
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Longi Solar LR7-72HVDF-665M vs Longi Solar LR7-72HVDF-660M
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06
Written summary
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07
Questions about this pairing
Which panel is better: Longi Solar LR7-54HTH-455M or Longi Solar LR7-72HVDF-665M?
According to our database: Longi Solar LR7-72HVDF-665M has higher module efficiency (24.60% vs 22.30%); Longi Solar LR7-72HVDF-665M tolerates heat better (temp coeff -0.260%/°C vs -0.280%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR7-54HTH-455M and Longi Solar LR7-72HVDF-665M?
Longi Solar LR7-54HTH-455M has a module efficiency of 22.30%, while Longi Solar LR7-72HVDF-665M is 24.60%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR7-54HTH-455M use vs Longi Solar LR7-72HVDF-665M?
Longi Solar LR7-54HTH-455M uses N-type cells; Longi Solar LR7-72HVDF-665M 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 LR7-54HTH-455M and Longi Solar LR7-72HVDF-665M?
Longi Solar LR7-54HTH-455M has a 25 years power warranty; Longi Solar LR7-72HVDF-665M 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 LR7-54HTH-455M and Longi Solar LR7-72HVDF-665M bifacial panels?
Longi Solar LR7-72HVDF-665M is bifacial (captures light from both faces); Longi Solar LR7-54HTH-455M is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath.
Shop prices: 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.