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BDO 450 vs BBO 520 9 of 19 identical Swap Change panels

Bisol BDO 450 vs Bisol BBO 520

Bisol BDO 450
Bisol
BDO 450
450 Wp 22.50 % PERC
Open panel page Datasheet PDF
VS
Bisol BBO 520
Bisol
BBO 520
520 Wp 23.20 % TOPCon
Open panel page Datasheet PDF
The verdict

BBO 520 leads on the differences that matter

The largest is module efficiency: 0.70 pp more efficient. 9 of 19 comparable parameters are identical.

See all 10 differences
How alike are they
9 of 19 comparable
parameters are identical
identical differs
01

What actually differs

10 of 19 parameters
Parameter BDO 450 BBO 520 Difference
Module efficiency 22.50 % 23.20 % 0.70 pp more efficient
Rated power 450 Wp 520 Wp 70 W more power
Power density 225.2 Wp/m² 232.2 Wp/m² 7.0 Wp/m² higher
Open-circuit voltage 35.30 V 40.60 V 5.30 V apart
Module area 1.998 m² 2.240 m² 0.242 m² apart
Weight 21.0 kg 23.5 kg 2.5 kg lighter
Cell technology PERC TOPCon PERC vs TOPCon
Voltage at max power 29.60 V 33.80 V 4.20 V apart
Cell count 96 108 12 cells apart
Dimensions 1762x1134x30 mm 1975x1134x35 mm 1762x1134x30 mm vs 1975x1134x35 mm
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 (-0.290 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other.
BDO 450
15,310 kWh
BBO 520
17,691 kWh
Lifetime gap
2,381 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario BDO 450 BBO 520
Standard test conditions 25 °C 100.0% of rated power 450 W 520 W
Cool, bright day 40 °C 95.7% of rated power 430 W 497 W
Typical summer roof 55 °C 91.3% of rated power 411 W 475 W
Hot roof 70 °C 87.0% of rated power 391 W 452 W
03

Full specification

Parameter BDO 450 BBO 520 Difference
Power and efficiency
Rated power 450 Wp 520 Wp +70 W for BBO 520
Module efficiency 22.50 % 23.20 % +0.70 pp for BBO 520
Power density 225.2 Wp/m² 232.2 Wp/m² +7.0 Wp/m² for BBO 520
Open-circuit voltage 35.30 V 40.60 V 5.30 V apart
Voltage at max power 29.60 V 33.80 V 4.20 V apart
Short-circuit current 16.10 A 16.20 A Effectively the same
Current at max power 15.20 A 15.40 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1975x1134x35 mm 1762x1134x30 mm vs 1975x1134x35 mm
Module area 1.998 m² 2.240 m² 0.242 m² apart
Weight 21.0 kg 23.5 kg -2.5 kg for BDO 450
Weight per kWp 46.7 kg/kWp 45.2 kg/kWp Effectively the same
Warranty and degradation
Product warranty 25 yrs 25 yrs Same
Performance warranty 30 yrs 30 yrs Same
Annual degradation 0.31 %/yr 0.31 %/yr Same
Technology
Cell technology PERC TOPCon PERC vs TOPCon
Cell type Monocrystalline Monocrystalline Same
Cell count 96 108 12 cells apart
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#4,222 vs #1,306
BBO 520 leads by 2,916 places
Power density
#4,225 vs #1,328
BBO 520 leads by 2,897 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#1,258 vs #635
BBO 520 leads by 623 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,031 vs #2,878
BBO 520 leads by 3,153 places
05

More useful comparisons

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Bisol BDO 450 vs Bisol BGO 560
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Bisol BDO 450 vs Bisol BBO 500
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Bisol BDO 450 vs Bisol BDO 460
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06

Written summary

07

Questions about this pairing

Which panel is better: Bisol BDO 450 or Bisol BBO 520?
According to our database: Bisol BBO 520 has higher module efficiency (23.20% vs 22.50%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Bisol BDO 450 and Bisol BBO 520?
Bisol BDO 450 has a module efficiency of 22.50%, while Bisol BBO 520 is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Bisol BDO 450 use vs Bisol BBO 520?
Bisol BDO 450 uses PERC cells; Bisol BBO 520 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 Bisol BDO 450 and Bisol BBO 520?
Bisol BDO 450 has a 30 years power warranty; Bisol BBO 520 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.

Shop prices: See 12 Bisol offers

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.