Longi Solar LR8-66HVD-665M vs Longi Solar LR7-60HVHL-560M
VS
The verdict
LR7-60HVHL-560M leads on the differences that matter
The largest is rated power: 105 W more power. 8 of 19 comparable parameters are identical.
See all 11 differencesHow alike are they
8
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
11 of 19 parameters
What actually differs
Parameter
LR8-66HVD-665M
LR7-60HVHL-560M
Difference
Rated power
665 Wp
560 Wp
105 W more power
Weight
33.5 kg
16.3 kg
17.2 kg lighter
Weight per kWp
50.4 kg/kWp
29.1 kg/kWp
21.3 kg/kWp lighter
Open-circuit voltage
50.02 V
45.28 V
4.74 V apart
Module area
2.701 m²
2.257 m²
0.445 m² apart
Short-circuit current
16.78 A
15.65 A
1.13 A apart
Cell count
132
120
12 cells apart
Voltage at max power
41.28 V
37.51 V
3.77 V apart
Bifacial
Yes
No
Yes vs No
Current at max power
16.11 A
14.93 A
1.18 A apart
Dimensions
2382x1134x30 mm
1990x1134x30 mm
2382x1134x30 mm vs 1990x1134x30 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 (-0.260 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
LR8-66HVD-665M
22,486 kWh
LR7-60HVHL-560M
18,935 kWh
Lifetime gap
3,551 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
LR8-66HVD-665M
LR7-60HVHL-560M
Standard test conditions
25 °C
100.0% of rated power
665 W
560 W
Cool, bright day
40 °C
96.1% of rated power
639 W
538 W
Typical summer roof
55 °C
92.2% of rated power
613 W
516 W
Hot roof
70 °C
88.3% of rated power
587 W
494 W
03
Full specification
Parameter
LR8-66HVD-665M
LR7-60HVHL-560M
Difference
Power and efficiency
Rated power
665 Wp
560 Wp
+105 W for LR8-66HVD-665M
Module efficiency
24.62 %
24.80 %
Effectively the same
Power density
246.2 Wp/m²
248.2 Wp/m²
Effectively the same
Open-circuit voltage
50.02 V
45.28 V
4.74 V apart
Voltage at max power
41.28 V
37.51 V
3.77 V apart
Short-circuit current
16.78 A
15.65 A
1.13 A apart
Current at max power
16.11 A
14.93 A
1.18 A apart
Temperature
Temperature coefficient
-0.260 %/°C
-0.260 %/°C
Same
Mechanical
Dimensions
2382x1134x30 mm
1990x1134x30 mm
2382x1134x30 mm vs 1990x1134x30 mm
Module area
2.701 m²
2.257 m²
0.445 m² apart
Weight
33.5 kg
16.3 kg
-17.2 kg for LR7-60HVHL-560M
Weight per kWp
50.4 kg/kWp
29.1 kg/kWp
-21.3 kg/kWp for LR7-60HVHL-560M
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
Back Contact
Back Contact
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
120
12 cells apart
Bifacial
Yes
No
Yes vs No
04
14,005 panels
Against the whole database
Efficiency
#42
vs
#12
LR7-60HVHL-560M leads by 30 places
Power density
#42
vs
#12
LR7-60HVHL-560M leads by 30 places
Heat behaviour
#511
vs
#511
Tied - the same position in the database
Weight
#3,742
vs
#130
LR7-60HVHL-560M leads by 3,612 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#397
vs
#1,683
LR8-66HVD-665M leads by 1,286 places
05
Open the full database
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9 differences, the largest is rated power
06
Written summary
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07
Questions about this pairing
Which panel is better: Longi Solar LR8-66HVD-665M or Longi Solar LR7-60HVHL-560M?
According to our database: Longi Solar LR7-60HVHL-560M has higher module efficiency (24.80% vs 24.62%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Longi Solar LR8-66HVD-665M and Longi Solar LR7-60HVHL-560M?
Longi Solar LR8-66HVD-665M has a module efficiency of 24.62%, while Longi Solar LR7-60HVHL-560M is 24.80%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Longi Solar LR8-66HVD-665M use vs Longi Solar LR7-60HVHL-560M?
Longi Solar LR8-66HVD-665M uses Back Contact cells; Longi Solar LR7-60HVHL-560M uses Back Contact. 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 LR8-66HVD-665M and Longi Solar LR7-60HVHL-560M?
Longi Solar LR8-66HVD-665M has a 30 years power warranty; Longi Solar LR7-60HVHL-560M 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 LR8-66HVD-665M and Longi Solar LR7-60HVHL-560M bifacial panels?
Longi Solar LR8-66HVD-665M is bifacial (captures light from both faces); Longi Solar LR7-60HVHL-560M 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.