Leapton LP182*199-M-66-NB 585W vs Leapton LP182*199-M-66-NB 580W
VS
The verdict
585W leads on the differences that matter
The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical.
See the one differenceHow alike are they
18
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
1 of 19 parameters
What actually differs
Parameter
585W
580W
Difference
Module efficiency
22.64 %
22.44 %
0.20 pp more efficient
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 (-0.300 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
585W
19,628 kWh
580W
19,460 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
585W
580W
Standard test conditions
25 °C
100.0% of rated power
585 W
580 W
Cool, bright day
40 °C
95.5% of rated power
559 W
554 W
Typical summer roof
55 °C
91.0% of rated power
532 W
528 W
Hot roof
70 °C
86.5% of rated power
506 W
502 W
03
Full specification
Parameter
585W
580W
Difference
Power and efficiency
Rated power
585 Wp
580 Wp
Effectively the same
Module efficiency
22.64 %
22.44 %
+0.20 pp for 585W
Power density
226.4 Wp/m²
224.4 Wp/m²
Effectively the same
Open-circuit voltage
48.42 V
48.22 V
Effectively the same
Voltage at max power
40.51 V
40.31 V
Effectively the same
Short-circuit current
15.27 A
15.22 A
Effectively the same
Current at max power
14.44 A
14.39 A
Effectively the same
Temperature
Temperature coefficient
-0.300 %/°C
-0.300 %/°C
Same
Mechanical
Dimensions
2279x1134x30 mm
2279x1134x30 mm
Same
Module area
2.584 m²
2.584 m²
Same
Weight
32.0 kg
32.0 kg
Same
Weight per kWp
54.7 kg/kWp
55.2 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
25 yrs
25 yrs
Same
Performance warranty
30 yrs
30 yrs
Same
Annual degradation
0.40 %/yr
0.40 %/yr
Same
Technology
Cell technology
TOPCon
TOPCon
Same
Cell type
Monocrystalline
Monocrystalline
Same
Cell count
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#3,600
vs
#4,716
585W leads by 1,116 places
Power density
#3,631
vs
#4,692
585W leads by 1,061 places
Heat behaviour
#6,093
vs
#6,093
Tied - the same position in the database
Weight
#9,081
vs
#9,588
585W leads by 507 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,796
vs
#2,065
585W leads by 269 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Leapton LP182*199-M-66-NB 585W or Leapton LP182*199-M-66-NB 580W?
According to our database: Leapton LP182*199-M-66-NB 585 W has higher module efficiency (22.64% vs 22.44%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Leapton LP182*199-M-66-NB 585W and Leapton LP182*199-M-66-NB 580W?
Leapton LP182*199-M-66-NB 585 W has a module efficiency of 22.64%, while Leapton LP182*199-M-66-NB 580 W is 22.44%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Leapton LP182*199-M-66-NB 585W use vs Leapton LP182*199-M-66-NB 580W?
Leapton LP182*199-M-66-NB 585 W uses TOPCon cells; Leapton LP182*199-M-66-NB 580 W uses TOPCon. 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 Leapton LP182*199-M-66-NB 585W and Leapton LP182*199-M-66-NB 580W?
Leapton LP182*199-M-66-NB 585 W has a 30 years power warranty; Leapton LP182*199-M-66-NB 580 W 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 Leapton LP182*199-M-66-NB 585W and Leapton LP182*199-M-66-NB 580W bifacial panels?
Both Leapton LP182*199-M-66-NB 585 W and Leapton LP182*199-M-66-NB 580 W are bifacial - they capture reflected light from the ground, which can add 5-15% more annual energy on ground-mount or elevated rooftop installations with a light surface beneath.
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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.