BYD NLBK-36 590 vs BYD NLBK-36 585
VS
The verdict
Identical on every published parameter
All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from.
How alike are they
19
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
0 of 19 parameters
What actually differs
Every comparable parameter agrees. The full specification is below.
02
What it means on a roof
Thirty years of production
Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year
Same temp coeff. for both panels (-0.278 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
590
19,796 kWh
585
19,628 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
590
585
Standard test conditions
25 °C
100.0% of rated power
590 W
585 W
Cool, bright day
40 °C
95.8% of rated power
565 W
561 W
Typical summer roof
55 °C
91.7% of rated power
541 W
536 W
Hot roof
70 °C
87.5% of rated power
516 W
512 W
03
Full specification
Parameter
590
585
Difference
Power and efficiency
Rated power
590 Wp
585 Wp
Effectively the same
Module efficiency
22.84 %
22.65 %
Effectively the same
Power density
228.4 Wp/m²
226.5 Wp/m²
Effectively the same
Open-circuit voltage
53.92 V
53.82 V
Effectively the same
Voltage at max power
45.04 V
44.90 V
Effectively the same
Short-circuit current
13.56 A
13.49 A
Effectively the same
Current at max power
13.10 A
13.03 A
Effectively the same
Temperature
Temperature coefficient
-0.278 %/°C
-0.278 %/°C
Same
Mechanical
Dimensions
2278x1134x30 mm
2278x1134x30 mm
Same
Module area
2.583 m²
2.583 m²
Same
Weight
32.0 kg
32.0 kg
Same
Weight per kWp
54.2 kg/kWp
54.7 kg/kWp
Effectively the same
Warranty and degradation
Product warranty
12 yrs
12 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
144
144
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#2,617
vs
#3,522
590 leads by 905 places
Power density
#2,598
vs
#3,500
590 leads by 902 places
Heat behaviour
#1,295
vs
#1,295
Tied - the same position in the database
Weight
#8,477
vs
#9,081
590 leads by 604 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#3,762
vs
#4,127
590 leads by 365 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: BYD NLBK-36 590 or BYD NLBK-36 585?
According to our database: BYD NLBK-36 590 has higher module efficiency (22.84% vs 22.65%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of BYD NLBK-36 590 and BYD NLBK-36 585?
BYD NLBK-36 590 has a module efficiency of 22.84%, while BYD NLBK-36 585 is 22.65%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does BYD NLBK-36 590 use vs BYD NLBK-36 585?
BYD NLBK-36 590 uses TOPCon cells; BYD NLBK-36 585 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 BYD NLBK-36 590 and BYD NLBK-36 585?
BYD NLBK-36 590 has a 30 years power warranty; BYD NLBK-36 585 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 BYD NLBK-36 590 and BYD NLBK-36 585 bifacial panels?
Both BYD NLBK-36 590 and BYD NLBK-36 585 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.
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.