Longi Solar LR5-72HPH-555M vs Longi Solar LR5-54HPH-425M
VS
The verdict
8 differences, and they point both ways
The largest is rated power: 130 W more power. 11 of 19 comparable parameters are identical.
See all 8 differencesHow alike are they
11
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
8 of 19 parameters
What actually differs
Parameter
72HPH-555M
54HPH-425M
Difference
Rated power
555 Wp
425 Wp
130 W more power
Weight
27.5 kg
20.8 kg
6.7 kg lighter
Open-circuit voltage
49.95 V
37.96 V
11.99 V apart
Module area
2.583 m²
1.953 m²
0.631 m² apart
Module efficiency
21.50 %
21.80 %
0.30 pp more efficient
Voltage at max power
42.10 V
31.94 V
10.16 V apart
Cell count
144
108
36 cells apart
Dimensions
2278x1134x35 mm
1722x1134x30 mm
2278x1134x35 mm vs 1722x1134x30 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
Same temp coeff. for both panels (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
72HPH-555M
17,987 kWh
54HPH-425M
13,774 kWh
Lifetime gap
4,213 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
72HPH-555M
54HPH-425M
Standard test conditions
25 °C
100.0% of rated power
555 W
425 W
Cool, bright day
40 °C
94.9% of rated power
527 W
403 W
Typical summer roof
55 °C
89.8% of rated power
498 W
382 W
Hot roof
70 °C
84.7% of rated power
470 W
360 W
03
Full specification
Parameter
72HPH-555M
54HPH-425M
Difference
Power and efficiency
Rated power
555 Wp
425 Wp
+130 W for 72HPH-555M
Module efficiency
21.50 %
21.80 %
+0.30 pp for 54HPH-425M
Power density
214.8 Wp/m²
217.6 Wp/m²
Effectively the same
Open-circuit voltage
49.95 V
37.96 V
11.99 V apart
Voltage at max power
42.10 V
31.94 V
10.16 V apart
Short-circuit current
14.04 A
14.08 A
Effectively the same
Current at max power
13.19 A
13.31 A
Effectively the same
Temperature
Temperature coefficient
-0.340 %/°C
-0.340 %/°C
Same
Mechanical
Dimensions
2278x1134x35 mm
1722x1134x30 mm
2278x1134x35 mm vs 1722x1134x30 mm
Module area
2.583 m²
1.953 m²
0.631 m² apart
Weight
27.5 kg
20.8 kg
-6.7 kg for 54HPH-425M
Weight per kWp
49.5 kg/kWp
48.9 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 yrs
Same
Performance warranty
25 yrs
25 yrs
Same
Annual degradation
0.55 %/yr
0.55 %/yr
Same
Technology
Cell technology
PERC
PERC
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
144
108
36 cells apart
Bifacial
No
No
Same
04
14,005 panels
Against the whole database
Efficiency
#7,958
vs
#7,022
54HPH-425M leads by 936 places
Power density
#8,034
vs
#7,172
54HPH-425M leads by 862 places
Heat behaviour
#8,778
vs
#8,778
Tied - the same position in the database
Weight
#3,116
vs
#2,624
54HPH-425M leads by 492 places
Warranty
#9,798
vs
#9,798
Tied - the same position in the database
Overall
#7,542
vs
#10,867
72HPH-555M leads by 3,325 places
05
Open the full database
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Longi Solar LR5-72HPH-555M vs Longi Solar LR5-72HPH-550M
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06
Written summary
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07
Questions about this pairing
Which panel is better: Longi Solar LR5-72HPH-555M or Longi Solar LR5-54HPH-425M?
According to our database: Longi Solar LR5-54HPH-425M has higher module efficiency (21.80% vs 21.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR5-72HPH-555M and Longi Solar LR5-54HPH-425M?
Longi Solar LR5-72HPH-555M has a module efficiency of 21.50%, while Longi Solar LR5-54HPH-425M is 21.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR5-72HPH-555M use vs Longi Solar LR5-54HPH-425M?
Longi Solar LR5-72HPH-555M uses PERC cells; Longi Solar LR5-54HPH-425M uses PERC. 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 LR5-72HPH-555M and Longi Solar LR5-54HPH-425M?
Longi Solar LR5-72HPH-555M has a 25 years power warranty; Longi Solar LR5-54HPH-425M has a 25 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.
Shop prices: See 147 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.