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LNCU-640N vs LNVU-580N 10 of 19 identical Swap Change panels

Luxen Solar Energy LNCU-640N vs Luxen Solar Energy LNVU-580N

Luxen Solar Energy LNCU-640N
Luxen Solar Energy
LNCU-640N
640 Wp 22.90 % N-type
Open panel page Datasheet PDF
VS
Luxen Solar Energy
LNVU-580N
580 Wp 22.44 % N-type
Open panel page Datasheet PDF
The verdict

LNCU-640N leads on the differences that matter

The largest is rated power: 60 W more power. 10 of 19 comparable parameters are identical.

See all 9 differences
How alike are they
10 of 19 comparable
parameters are identical
identical differs
01

What actually differs

9 of 19 parameters
Parameter LNCU-640N LNVU-580N Difference
Rated power 640 Wp 580 Wp 60 W more power
Module efficiency 22.90 % 22.44 % 0.46 pp more efficient
Module area 2.795 m² 2.583 m² 0.212 m² apart
Weight 29.8 kg 27.3 kg 2.5 kg lighter
Power density 229.0 Wp/m² 224.5 Wp/m² 4.4 Wp/m² higher
Short-circuit current 15.40 A 14.33 A 1.07 A apart
Open-circuit voltage 52.73 V 51.57 V 1.16 V apart
Current at max power 14.53 A 13.46 A 1.07 A apart
Dimensions 2465x1134x33 mm 2278x1134x33 mm 2465x1134x33 mm vs 2278x1134x33 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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
LNCU-640N
21,473 kWh
LNVU-580N
19,460 kWh
Lifetime gap
2,013 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario LNCU-640N LNVU-580N
Standard test conditions 25 °C 100.0% of rated power 640 W 580 W
Cool, bright day 40 °C 95.7% of rated power 612 W 555 W
Typical summer roof 55 °C 91.3% of rated power 584 W 530 W
Hot roof 70 °C 87.0% of rated power 556 W 504 W
03

Full specification

Parameter LNCU-640N LNVU-580N Difference
Power and efficiency
Rated power 640 Wp 580 Wp +60 W for LNCU-640N
Module efficiency 22.90 % 22.44 % +0.46 pp for LNCU-640N
Power density 229.0 Wp/m² 224.5 Wp/m² +4.4 Wp/m² for LNCU-640N
Open-circuit voltage 52.73 V 51.57 V 1.16 V apart
Voltage at max power 44.05 V 43.09 V Effectively the same
Short-circuit current 15.40 A 14.33 A 1.07 A apart
Current at max power 14.53 A 13.46 A 1.07 A apart
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2465x1134x33 mm 2278x1134x33 mm 2465x1134x33 mm vs 2278x1134x33 mm
Module area 2.795 m² 2.583 m² 0.212 m² apart
Weight 29.8 kg 27.3 kg -2.5 kg for LNVU-580N
Weight per kWp 46.6 kg/kWp 47.1 kg/kWp Effectively the same
Warranty and degradation
Product warranty 20 yrs 20 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.40 %/yr 0.40 %/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
#2,412 vs #4,776
LNCU-640N leads by 2,364 places
Power density
#2,443 vs #4,607
LNCU-640N leads by 2,164 places
Heat behaviour
#2,220 vs #2,220
Tied - the same position in the database
Weight
#1,230 vs #1,491
LNCU-640N leads by 261 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,163 vs #2,856
LNCU-640N leads by 1,693 places
05

More useful comparisons

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8 differences, the largest is rated power
06

Written summary

07

Questions about this pairing

Which panel is better: Luxen Solar Energy LNCU-640N or Luxen Solar Energy LNVU-580N?
According to our database: Luxen Solar Energy LNCU-640N has higher module efficiency (22.90% vs 22.44%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Luxen Solar Energy LNCU-640N and Luxen Solar Energy LNVU-580N?
Luxen Solar Energy LNCU-640N has a module efficiency of 22.90%, while Luxen Solar Energy LNVU-580N is 22.44%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Luxen Solar Energy LNCU-640N use vs Luxen Solar Energy LNVU-580N?
Luxen Solar Energy LNCU-640N uses N-type cells; Luxen Solar Energy LNVU-580N 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 Luxen Solar Energy LNCU-640N and Luxen Solar Energy LNVU-580N?
Luxen Solar Energy LNCU-640N has a 30 years power warranty; Luxen Solar Energy LNVU-580N 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 3 Luxen Solar Energy 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.