BYD NLBK-36-585 vs BYD NLBK-36 590
VS
The verdict
36 590 leads on the differences that matter
The largest is temperature coefficient: 0.022 %/°C better in heat. 14 of 19 comparable parameters are identical.
See all 5 differencesHow alike are they
14
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
5 of 19 parameters
What actually differs
Parameter
36-585
36 590
Difference
Temperature coefficient
-0.300 %/°C
-0.278 %/°C
0.022 %/°C better in heat
Open-circuit voltage
51.14 V
53.92 V
2.78 V apart
Short-circuit current
14.55 A
13.56 A
0.99 A apart
Voltage at max power
42.51 V
45.04 V
2.53 V apart
Current at max power
13.77 A
13.10 A
0.67 A apart
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
36-585
19,628 kWh
36 590
19,796 kWh
Lifetime gap
168 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
36-585
36 590
Standard test conditions
25 °C
100.0% of rated power
585 W
590 W
Cool, bright day
40 °C
95.5% of rated power
559 W
565 W
Typical summer roof
55 °C
91.0% of rated power
532 W
541 W
Hot roof
70 °C
86.5% of rated power
506 W
516 W
03
Full specification
Parameter
36-585
36 590
Difference
Power and efficiency
Rated power
585 Wp
590 Wp
Effectively the same
Module efficiency
22.65 %
22.84 %
Effectively the same
Power density
226.5 Wp/m²
228.4 Wp/m²
Effectively the same
Open-circuit voltage
51.14 V
53.92 V
2.78 V apart
Voltage at max power
42.51 V
45.04 V
2.53 V apart
Short-circuit current
14.55 A
13.56 A
0.99 A apart
Current at max power
13.77 A
13.10 A
0.67 A apart
Temperature
Temperature coefficient
-0.300 %/°C
-0.278 %/°C
+0.022 %/°C for 36 590
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
54.7 kg/kWp
54.2 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
#3,522
vs
#2,617
36 590 leads by 905 places
Power density
#3,500
vs
#2,598
36 590 leads by 902 places
Heat behaviour
#6,093
vs
#1,295
36 590 leads by 4,798 places
Weight
#9,081
vs
#8,477
36 590 leads by 604 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#4,127
vs
#3,762
36 590 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-36-585 or BYD NLBK-36 590?
According to our database: BYD NLBK-36 590 has higher module efficiency (22.84% vs 22.65%); BYD NLBK-36 590 tolerates heat better (temp coeff -0.278%/°C vs -0.300%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of BYD NLBK-36-585 and BYD NLBK-36 590?
BYD NLBK-36-585 has a module efficiency of 22.65%, while BYD NLBK-36 590 is 22.84%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does BYD NLBK-36-585 use vs BYD NLBK-36 590?
BYD NLBK-36-585 uses TOPCon cells; BYD NLBK-36 590 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-36-585 and BYD NLBK-36 590?
BYD NLBK-36-585 has a 30 years power warranty; BYD NLBK-36 590 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-36-585 and BYD NLBK-36 590 bifacial panels?
Both BYD NLBK-36-585 and BYD NLBK-36 590 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.