510 vs 520 15 of 19 identical Swap Change panels

Bisol BBO 510 vs Bisol BBO 520

Q: Which panel is better: Bisol BBO 510 or Bisol BBO 520?

According to our database: Bisol BBO 520 has higher module efficiency (23.20% vs 22.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.

Q: What is the efficiency of Bisol BBO 510 and Bisol BBO 520?

Bisol BBO 510 has a module efficiency of 22.80%, while Bisol BBO 520 is 23.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.

Q: What cell technology does Bisol BBO 510 use vs Bisol BBO 520?

Bisol BBO 510 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.

Q: What is the warranty on Bisol BBO 510 and Bisol BBO 520?

Bisol BBO 510 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.

Bisol

BBO 510

510 Wp 22.80 % PERC

Open panel page Datasheet PDF

Bisol

BBO 520

520 Wp 23.20 % TOPCon

Open panel page Datasheet PDF

The verdict

520 leads on the differences that matter

The largest is module efficiency: 0.40 pp more efficient. 15 of 19 comparable parameters are identical.

See all 4 differences

How alike are they

15 of 19 comparable
parameters are identical

identical differs

What actually differs

4 of 19 parameters

Parameter 510 520 Difference

Module efficiency 22.80 % 23.20 % 0.40 pp more efficient

Power density 227.7 Wp/m² 232.2 Wp/m² 4.5 Wp/m² higher

Cell technology PERC TOPCon PERC vs TOPCon

Rated power 510 Wp 520 Wp 10 W more power

What it means on a roof

Thirty years of production

Each panel's own declared degradation curve, at 1,200 kWh/kWp a year

Cell temperature

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.

510

17,351 kWh

520

17,691 kWh

Lifetime gap

340 kWh

Output when it is hot

Rated power carried across the range a module actually sees

Scenario 510 520

Standard test conditions 25 °C 100.0% of rated power 510 W 520 W

Cool, bright day 40 °C 95.7% of rated power 488 W 497 W

Typical summer roof 55 °C 91.3% of rated power 466 W 475 W

Hot roof 70 °C 87.0% of rated power 443 W 452 W

Full specification

Parameter 510 520 Difference

Power and efficiency

Rated power 510 Wp 520 Wp +10 W for 520

Module efficiency 22.80 % 23.20 % +0.40 pp for 520

Power density 227.7 Wp/m² 232.2 Wp/m² +4.5 Wp/m² for 520

Open-circuit voltage 40.00 V 40.60 V Effectively the same

Voltage at max power 33.60 V 33.80 V Effectively the same

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 1975x1134x35 mm 1975x1134x35 mm Same

Module area 2.240 m² 2.240 m² Same

Weight 23.5 kg 23.5 kg Same

Weight per kWp 46.1 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 108 108 Same

Bifacial No No Same

Against the whole database

14,005 panels

Efficiency

#2,714 vs #1,306

520 leads by 1,408 places

Power density

#3,074 vs #1,328

520 leads by 1,746 places

Heat behaviour

#2,165 vs #2,165

Tied - the same position in the database

Weight

#979 vs #635

520 leads by 344 places

Warranty

#21 vs #21

Tied - the same position in the database

Overall

#3,687 vs #2,878

520 leads by 809 places

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Written summary

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Questions about this pairing

Which panel is better: Bisol BBO 510 or Bisol BBO 520?

According to our database: Bisol BBO 520 has higher module efficiency (23.20% vs 22.80%). See the full spec comparison and 30-year energy simulation above for a complete picture.

What is the efficiency of Bisol BBO 510 and Bisol BBO 520?

Bisol BBO 510 has a module efficiency of 22.80%, 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 BBO 510 use vs Bisol BBO 520?

Bisol BBO 510 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 BBO 510 and Bisol BBO 520?

Bisol BBO 510 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.