BYD NSBK-33-715 vs BYD NSBK-33-690
VS
The verdict
715 leads on the differences that matter
The largest is module efficiency: 0.81 pp more efficient. 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
715
690
Difference
Module efficiency
23.03 %
22.22 %
0.81 pp more efficient
Power density
230.2 Wp/m²
222.1 Wp/m²
8.0 Wp/m² higher
Rated power
715 Wp
690 Wp
25 W more power
Open-circuit voltage
49.22 V
48.12 V
1.10 V apart
Voltage at max power
41.38 V
40.28 V
1.10 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
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.
715
23,990 kWh
690
23,151 kWh
Lifetime gap
839 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
715
690
Standard test conditions
25 °C
100.0% of rated power
715 W
690 W
Cool, bright day
40 °C
95.8% of rated power
685 W
661 W
Typical summer roof
55 °C
91.7% of rated power
655 W
632 W
Hot roof
70 °C
87.5% of rated power
626 W
604 W
03
Full specification
Parameter
715
690
Difference
Power and efficiency
Rated power
715 Wp
690 Wp
+25 W for 715
Module efficiency
23.03 %
22.22 %
+0.81 pp for 715
Power density
230.2 Wp/m²
222.1 Wp/m²
+8.0 Wp/m² for 715
Open-circuit voltage
49.22 V
48.12 V
1.10 V apart
Voltage at max power
41.38 V
40.28 V
1.10 V apart
Short-circuit current
18.23 A
18.08 A
Effectively the same
Current at max power
17.28 A
17.13 A
Effectively the same
Temperature
Temperature coefficient
-0.278 %/°C
-0.278 %/°C
Same
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
53.6 kg/kWp
55.5 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
132
132
Same
Bifacial
Yes
Yes
Same
04
14,005 panels
Against the whole database
Efficiency
#1,744
vs
#5,753
715 leads by 4,009 places
Power density
#2,018
vs
#5,734
715 leads by 3,716 places
Heat behaviour
#1,295
vs
#1,295
Tied - the same position in the database
Weight
#7,566
vs
#9,882
715 leads by 2,316 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#664
vs
#1,523
715 leads by 859 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 NSBK-33-715 or BYD NSBK-33-690?
According to our database: BYD NSBK-33-715 has higher module efficiency (23.03% vs 22.22%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of BYD NSBK-33-715 and BYD NSBK-33-690?
BYD NSBK-33-715 has a module efficiency of 23.03%, while BYD NSBK-33-690 is 22.22%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does BYD NSBK-33-715 use vs BYD NSBK-33-690?
BYD NSBK-33-715 uses TOPCon cells; BYD NSBK-33-690 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 NSBK-33-715 and BYD NSBK-33-690?
BYD NSBK-33-715 has a 30 years power warranty; BYD NSBK-33-690 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-33-715 and BYD NSBK-33-690 bifacial panels?
Both BYD NSBK-33-715 and BYD NSBK-33-690 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.