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NSBK-33-690 vs HSBK-33-735 11 of 19 identical Swap Change panels

BYD NSBK-33-690 vs BYD HSBK-33-735

BYD NSBK-33-690
BYD
NSBK-33-690
690 Wp 22.22 % 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: 1.44 pp more efficient. 11 of 19 comparable parameters are identical.

See all 8 differences
How alike are they
11 of 19 comparable
parameters are identical
identical differs
01

What actually differs

8 of 19 parameters
Parameter NSBK-33-690 HSBK-33-735 Difference
Module efficiency 22.22 % 23.66 % 1.44 pp more efficient
Temperature coefficient -0.278 %/°C -0.240 %/°C 0.038 %/°C better in heat
Rated power 690 Wp 735 Wp 45 W more power
Power density 222.1 Wp/m² 236.6 Wp/m² 14.5 Wp/m² higher
Weight per kWp 55.5 kg/kWp 52.1 kg/kWp 3.4 kg/kWp lighter
Cell technology TOPCon HJT TOPCon vs HJT
Open-circuit voltage 48.12 V 50.47 V 2.35 V apart
Voltage at max power 40.28 V 42.41 V 2.13 V apart
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
NSBK-33-690
23,151 kWh
HSBK-33-735
24,661 kWh
Lifetime gap
1,510 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario NSBK-33-690 HSBK-33-735
Standard test conditions 25 °C 100.0% of rated power 690 W 735 W
Cool, bright day 40 °C 95.8% of rated power 661 W 709 W
Typical summer roof 55 °C 91.7% of rated power 632 W 682 W
Hot roof 70 °C 87.5% of rated power 604 W 656 W
03

Full specification

Parameter NSBK-33-690 HSBK-33-735 Difference
Power and efficiency
Rated power 690 Wp 735 Wp +45 W for HSBK-33-735
Module efficiency 22.22 % 23.66 % +1.44 pp for HSBK-33-735
Power density 222.1 Wp/m² 236.6 Wp/m² +14.5 Wp/m² for HSBK-33-735
Open-circuit voltage 48.12 V 50.47 V 2.35 V apart
Voltage at max power 40.28 V 42.41 V 2.13 V apart
Short-circuit current 18.08 A 18.44 A Effectively the same
Current at max power 17.13 A 17.34 A Effectively the same
Temperature
Temperature coefficient -0.278 %/°C -0.240 %/°C +0.038 %/°C for HSBK-33-735
Mechanical
Dimensions 2384x1303x33 mm 2384x1303x33 mm Same
Module area 3.106 m² 3.106 m² Same
Weight 38.3 kg 38.3 kg Same
Weight per kWp 55.5 kg/kWp 52.1 kg/kWp -3.4 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 132 132 Same
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#5,753 vs #602
HSBK-33-735 leads by 5,151 places
Power density
#5,734 vs #582
HSBK-33-735 leads by 5,152 places
Heat behaviour
#1,295 vs #13
HSBK-33-735 leads by 1,282 places
Weight
#9,882 vs #5,576
HSBK-33-735 leads by 4,306 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,523 vs #244
HSBK-33-735 leads by 1,279 places
05

More useful comparisons

Open the full database
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BYD NSBK-33-690 vs BYD NSBK-33-720
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BYD NSBK-33-690 vs BYD NSBK-33-715
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BYD NSBK-33-690 vs BYD NSBK-33-710
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BYD NSBK-33-690 vs BYD NSBK-33-705
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BYD NSBK-33-690 vs BYD NSBK-33-700
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BYD NSBK-33-690 vs BYD NSBK-33-695
The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: BYD NSBK-33-690 or BYD HSBK-33-735?
According to our database: BYD HSBK-33-735 has higher module efficiency (23.66% vs 22.22%); 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 NSBK-33-690 and BYD HSBK-33-735?
BYD NSBK-33-690 has a module efficiency of 22.22%, 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 NSBK-33-690 use vs BYD HSBK-33-735?
BYD NSBK-33-690 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 NSBK-33-690 and BYD HSBK-33-735?
BYD NSBK-33-690 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 NSBK-33-690 and BYD HSBK-33-735 bifacial panels?
Both BYD NSBK-33-690 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.