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72HVH-635M vs 72HVHF-665M 15 of 19 identical Swap Change panels

Longi Solar LR7-72HVH-635M vs Longi Solar LR7-72HVHF-665M

LR7-72HVH-635M
635 Wp 23.50 % N-type
Open panel page Datasheet PDF
VS
Longi Solar LR7-72HVHF-665M
LR7-72HVHF-665M
665 Wp 24.60 % N-type
Open panel page Datasheet PDF
The verdict

72HVHF-665M leads on the differences that matter

The largest is module efficiency: 1.10 pp more efficient. 15 of 19 comparable parameters are identical.

See all 4 differences
How alike are they
15 of 19 comparable
parameters are identical
identical differs
01

What actually differs

4 of 19 parameters
Parameter 72HVH-635M 72HVHF-665M Difference
Module efficiency 23.50 % 24.60 % 1.10 pp more efficient
Power density 235.1 Wp/m² 246.2 Wp/m² 11.1 Wp/m² higher
Rated power 635 Wp 665 Wp 30 W more power
Weight per kWp 44.9 kg/kWp 42.9 kg/kWp 2.0 kg/kWp lighter
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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
72HVH-635M
21,471 kWh
72HVHF-665M
22,486 kWh
Lifetime gap
1,015 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 72HVH-635M 72HVHF-665M
Standard test conditions 25 °C 100.0% of rated power 635 W 665 W
Cool, bright day 40 °C 96.1% of rated power 610 W 639 W
Typical summer roof 55 °C 92.2% of rated power 585 W 613 W
Hot roof 70 °C 88.3% of rated power 561 W 587 W
03

Full specification

Parameter 72HVH-635M 72HVHF-665M Difference
Power and efficiency
Rated power 635 Wp 665 Wp +30 W for 72HVHF-665M
Module efficiency 23.50 % 24.60 % +1.10 pp for 72HVHF-665M
Power density 235.1 Wp/m² 246.2 Wp/m² +11.1 Wp/m² for 72HVHF-665M
Open-circuit voltage 53.60 V 54.20 V Effectively the same
Voltage at max power 44.26 V 44.86 V Effectively the same
Short-circuit current 15.05 A 15.52 A Effectively the same
Current at max power 14.35 A 14.83 A Effectively the same
Temperature
Temperature coefficient -0.260 %/°C -0.260 %/°C Same
Mechanical
Dimensions 2382x1134x30 mm 2382x1134x30 mm Same
Module area 2.701 m² 2.701 m² Same
Weight 28.5 kg 28.5 kg Same
Weight per kWp 44.9 kg/kWp 42.9 kg/kWp -2.0 kg/kWp for 72HVHF-665M
Warranty and degradation
Product warranty 15 yrs 15 yrs Same
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 144 144 Same
Bifacial No No Same
04

Against the whole database

14,129 panels
Efficiency
#749 vs #58
72HVHF-665M leads by 691 places
Power density
#777 vs #47
72HVHF-665M leads by 730 places
Heat behaviour
#515 vs #515
Tied - the same position in the database
Weight
#560 vs #244
72HVHF-665M leads by 316 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,413 vs #391
72HVHF-665M leads by 1,022 places
05

More useful comparisons

Open the full database
Same series, other bin
Longi Solar LR7-72HVH-635M vs Longi Solar LR7-72HVH-630M
One difference: module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-665M vs Longi Solar LR7-72HVHF-670M
One difference: module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-665M vs Longi Solar LR7-72HVHF-660M
One difference: module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-665M vs Longi Solar LR7-72HVHF-655M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-665M vs Longi Solar LR7-72HVHF-650M
3 differences, the largest is module efficiency
Same series, other bin
Longi Solar LR7-72HVHF-665M vs Longi Solar LR7-72HVHF-645M
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Longi Solar LR7-72HVH-635M or Longi Solar LR7-72HVHF-665M?
According to our database: Longi Solar LR7-72HVHF-665M has higher module efficiency (24.60% vs 23.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR7-72HVH-635M and Longi Solar LR7-72HVHF-665M?
Longi Solar LR7-72HVH-635M has a module efficiency of 23.50%, while Longi Solar LR7-72HVHF-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 LR7-72HVH-635M use vs Longi Solar LR7-72HVHF-665M?
Longi Solar LR7-72HVH-635M uses N-type cells; Longi Solar LR7-72HVHF-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 LR7-72HVH-635M and Longi Solar LR7-72HVHF-665M?
Longi Solar LR7-72HVH-635M has a 30 years power warranty; Longi Solar LR7-72HVHF-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.

Shop prices: See 151 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.