Skip to main content
54HPB-410M vs 66HPH-510M 9 of 18 identical Swap Change panels

Longi Solar LR5-54HPB-410M vs Longi Solar LR5-66HPH-510M

Longi Solar LR5-54HPB-410M
LR5-54HPB-410M
410 Wp 21.00 % PERC
Open panel page Datasheet PDF
VS
Longi Solar LR5-66HPH-510M
LR5-66HPH-510M
510 Wp 21.50 %
Open panel page Datasheet PDF
The verdict

66HPH-510M leads on the differences that matter

The largest is rated power: 100 W more power. 9 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it.

See all 9 differences
How alike are they
9 of 18 comparable
parameters are identical
identical differs not published
01

What actually differs

9 of 18 parameters
Parameter 54HPB-410M 66HPH-510M Difference
Rated power 410 Wp 510 Wp 100 W more power
Module efficiency 21.00 % 21.50 % 0.50 pp more efficient
Weight 20.8 kg 25.3 kg 4.5 kg lighter
Open-circuit voltage 37.40 V 45.85 V 8.45 V apart
Module area 1.953 m² 2.373 m² 0.421 m² apart
Power density 210.0 Wp/m² 214.9 Wp/m² 4.9 Wp/m² higher
Voltage at max power 31.42 V 38.68 V 7.26 V apart
Cell count 108 132 24 cells apart
Dimensions 1722x1134x30 mm 2093x1134x35 mm 1722x1134x30 mm vs 2093x1134x35 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.
54HPB-410M
13,288 kWh
66HPH-510M
16,529 kWh
Lifetime gap
3,241 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 54HPB-410M 66HPH-510M
Standard test conditions 25 °C 100.0% of rated power 410 W 510 W
Cool, bright day 40 °C 94.9% of rated power 389 W 484 W
Typical summer roof 55 °C 89.8% of rated power 368 W 458 W
Hot roof 70 °C 84.7% of rated power 347 W 432 W
03

Full specification

Parameter 54HPB-410M 66HPH-510M Difference
Power and efficiency
Rated power 410 Wp 510 Wp +100 W for 66HPH-510M
Module efficiency 21.00 % 21.50 % +0.50 pp for 66HPH-510M
Power density 210.0 Wp/m² 214.9 Wp/m² +4.9 Wp/m² for 66HPH-510M
Open-circuit voltage 37.40 V 45.85 V 8.45 V apart
Voltage at max power 31.42 V 38.68 V 7.26 V apart
Short-circuit current 13.84 A 14.05 A Effectively the same
Current at max power 13.05 A 13.19 A Effectively the same
Temperature
Temperature coefficient -0.340 %/°C -0.340 %/°C Same
Mechanical
Dimensions 1722x1134x30 mm 2093x1134x35 mm 1722x1134x30 mm vs 2093x1134x35 mm
Module area 1.953 m² 2.373 m² 0.421 m² apart
Weight 20.8 kg 25.3 kg -4.5 kg for 54HPB-410M
Weight per kWp 50.7 kg/kWp 49.6 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 - Not published by Longi Solar
Cell type Monocrystalline Monocrystalline Same
Cell count 108 132 24 cells apart
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#9,758 vs #7,958
66HPH-510M leads by 1,800 places
Power density
#9,772 vs #8,033
66HPH-510M leads by 1,739 places
Heat behaviour
#8,778 vs #8,778
Tied - the same position in the database
Weight
#4,132 vs #3,154
66HPH-510M leads by 978 places
Warranty
#9,798 vs #9,798
Tied - the same position in the database
Overall
#11,673 vs #9,133
66HPH-510M leads by 2,540 places
05

More useful comparisons

Open the full database
Same series, other bin
Longi Solar LR5-54HPB-410M vs Longi Solar LR5-72HPH-565M
10 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR5-54HPB-410M vs Longi Solar LR5-72HPH-560M
9 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR5-54HPB-410M vs Longi Solar LR5-72HPH-555M
9 differences, the largest is rated power
Same series, other bin
Longi Solar LR5-54HPB-410M vs Longi Solar LR5-72HPH-550M
8 differences, the largest is rated power
Same series, other bin
Longi Solar LR5-54HPB-410M vs Longi Solar LR5-72HPH-545M
7 differences, the largest is rated power
Same series, other bin
Longi Solar LR5-54HPB-410M vs Longi Solar LR5-66HPH-515M
9 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Longi Solar LR5-54HPB-410M or Longi Solar LR5-66HPH-510M?
According to our database: Longi Solar LR5-66HPH-510M has higher module efficiency (21.50% vs 21.00%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR5-54HPB-410M and Longi Solar LR5-66HPH-510M?
Longi Solar LR5-54HPB-410M has a module efficiency of 21.00%, while Longi Solar LR5-66HPH-510M is 21.50%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR5-54HPB-410M use vs Longi Solar LR5-66HPH-510M?
Longi Solar LR5-54HPB-410M uses PERC cells; Longi Solar LR5-66HPH-510M uses Monocrystalline. 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 LR5-54HPB-410M and Longi Solar LR5-66HPH-510M?
Longi Solar LR5-54HPB-410M has a 25 years power warranty; Longi Solar LR5-66HPH-510M 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 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.