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NLBK-36 580 vs HSBK-33-735 6 of 19 identical Swap Change panels

BYD NLBK-36 580 vs BYD HSBK-33-735

BYD NLBK-36 580
BYD
NLBK-36 580
580 Wp 22.45 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
BYD HSBK-33-735
BYD
HSBK-33-735
735 Wp 23.66 % HJT Bifacial
Open panel page Datasheet PDF
The verdict

HSBK-33-735 leads on the differences that matter

The largest is module efficiency: 1.21 pp more efficient. 6 of 19 comparable parameters are identical.

See all 13 differences
How alike are they
6 of 19 comparable
parameters are identical
identical differs
01

What actually differs

13 of 19 parameters
Parameter NLBK-36 580 HSBK-33-735 Difference
Module efficiency 22.45 % 23.66 % 1.21 pp more efficient
Temperature coefficient -0.278 %/°C -0.240 %/°C 0.038 %/°C better in heat
Rated power 580 Wp 735 Wp 155 W more power
Power density 224.5 Wp/m² 236.6 Wp/m² 12.1 Wp/m² higher
Weight 32.0 kg 38.3 kg 6.3 kg lighter
Short-circuit current 13.86 A 18.44 A 4.58 A apart
Module area 2.583 m² 3.106 m² 0.523 m² apart
Cell technology TOPCon HJT TOPCon vs HJT
Weight per kWp 55.2 kg/kWp 52.1 kg/kWp 3.1 kg/kWp lighter
Open-circuit voltage 52.69 V 50.47 V 2.22 V apart
Current at max power 13.43 A 17.34 A 3.91 A apart
Cell count 144 132 12 cells apart
Dimensions 2278x1134x30 mm 2384x1303x33 mm 2278x1134x30 mm vs 2384x1303x33 mm
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
NLBK-36 580
19,460 kWh
HSBK-33-735
24,661 kWh
Lifetime gap
5,201 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario NLBK-36 580 HSBK-33-735
Standard test conditions 25 °C 100.0% of rated power 580 W 735 W
Cool, bright day 40 °C 95.8% of rated power 556 W 709 W
Typical summer roof 55 °C 91.7% of rated power 532 W 682 W
Hot roof 70 °C 87.5% of rated power 507 W 656 W
03

Full specification

Parameter NLBK-36 580 HSBK-33-735 Difference
Power and efficiency
Rated power 580 Wp 735 Wp +155 W for HSBK-33-735
Module efficiency 22.45 % 23.66 % +1.21 pp for HSBK-33-735
Power density 224.5 Wp/m² 236.6 Wp/m² +12.1 Wp/m² for HSBK-33-735
Open-circuit voltage 52.69 V 50.47 V 2.22 V apart
Voltage at max power 43.18 V 42.41 V Effectively the same
Short-circuit current 13.86 A 18.44 A 4.58 A apart
Current at max power 13.43 A 17.34 A 3.91 A apart
Temperature
Temperature coefficient -0.278 %/°C -0.240 %/°C +0.038 %/°C for HSBK-33-735
Mechanical
Dimensions 2278x1134x30 mm 2384x1303x33 mm 2278x1134x30 mm vs 2384x1303x33 mm
Module area 2.583 m² 3.106 m² 0.523 m² apart
Weight 32.0 kg 38.3 kg -6.3 kg for NLBK-36 580
Weight per kWp 55.2 kg/kWp 52.1 kg/kWp -3.1 kg/kWp for HSBK-33-735
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 HJT TOPCon vs HJT
Cell type Monocrystalline Monocrystalline Same
Cell count 144 132 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#4,620 vs #602
HSBK-33-735 leads by 4,018 places
Power density
#4,547 vs #582
HSBK-33-735 leads by 3,965 places
Heat behaviour
#1,295 vs #13
HSBK-33-735 leads by 1,282 places
Weight
#9,588 vs #5,576
HSBK-33-735 leads by 4,012 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#4,564 vs #244
HSBK-33-735 leads by 4,320 places
05

More useful comparisons

Open the full database
Same series, other bin
BYD
BYD NLBK-36 580 vs BYD NLBK-36 600
5 differences, the largest is module efficiency
Same series, other bin
BYD
BYD NLBK-36 580 vs BYD NLBK-36 595
5 differences, the largest is module efficiency
Same series, other bin
BYD
BYD NLBK-36 580 vs BYD NLBK-36 590
5 differences, the largest is module efficiency
Same series, other bin
BYD
BYD NLBK-36 580 vs BYD NLBK-36 585
3 differences, the largest is module efficiency
Same series, other bin
BYD
BYD NLBK-36 580 vs BYD NLBK-36 575
The same specification on paper
Same series, other bin
BYD
BYD NLBK-36 580 vs BYD NLBK-36 570
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: BYD NLBK-36 580 or BYD HSBK-33-735?
According to our database: BYD HSBK-33-735 has higher module efficiency (23.66% vs 22.45%); BYD HSBK-33-735 tolerates heat better (temp coeff -0.240%/°C vs -0.278%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of BYD NLBK-36 580 and BYD HSBK-33-735?
BYD NLBK-36 580 has a module efficiency of 22.45%, while BYD HSBK-33-735 is 23.66%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does BYD NLBK-36 580 use vs BYD HSBK-33-735?
BYD NLBK-36 580 uses TOPCon cells; BYD HSBK-33-735 uses HJT. 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-36 580 and BYD HSBK-33-735?
BYD NLBK-36 580 has a 30 years power warranty; BYD HSBK-33-735 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-36 580 and BYD HSBK-33-735 bifacial panels?
Both BYD NLBK-36 580 and BYD HSBK-33-735 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.