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BGO 580 vs BBO 520 11 of 19 identical Swap Change panels

Bisol BGO 580 vs Bisol BBO 520

Bisol
BGO 580
580 Wp 23.50 % TOPCon
Open panel page Datasheet PDF
VS
Bisol BBO 520
Bisol
BBO 520
520 Wp 23.20 % TOPCon
Open panel page Datasheet PDF
The verdict

BGO 580 leads on the differences that matter

The largest is rated power: 60 W more power. 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 BGO 580 BBO 520 Difference
Rated power 580 Wp 520 Wp 60 W more power
Open-circuit voltage 45.20 V 40.60 V 4.60 V apart
Module area 2.469 m² 2.240 m² 0.229 m² apart
Module efficiency 23.50 % 23.20 % 0.30 pp more efficient
Weight 26.0 kg 23.5 kg 2.5 kg lighter
Cell count 120 108 12 cells apart
Voltage at max power 37.70 V 33.80 V 3.90 V apart
Dimensions 2177x1134x35 mm 1975x1134x35 mm 2177x1134x35 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.
BGO 580
19,733 kWh
BBO 520
17,691 kWh
Lifetime gap
2,042 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario BGO 580 BBO 520
Standard test conditions 25 °C 100.0% of rated power 580 W 520 W
Cool, bright day 40 °C 95.7% of rated power 555 W 497 W
Typical summer roof 55 °C 91.3% of rated power 530 W 475 W
Hot roof 70 °C 87.0% of rated power 504 W 452 W
03

Full specification

Parameter BGO 580 BBO 520 Difference
Power and efficiency
Rated power 580 Wp 520 Wp +60 W for BGO 580
Module efficiency 23.50 % 23.20 % +0.30 pp for BGO 580
Power density 234.9 Wp/m² 232.2 Wp/m² Effectively the same
Open-circuit voltage 45.20 V 40.60 V 4.60 V apart
Voltage at max power 37.70 V 33.80 V 3.90 V apart
Short-circuit current 16.20 A 16.20 A Same
Current at max power 15.40 A 15.40 A Same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 2177x1134x35 mm 1975x1134x35 mm 2177x1134x35 mm vs 1975x1134x35 mm
Module area 2.469 m² 2.240 m² 0.229 m² apart
Weight 26.0 kg 23.5 kg -2.5 kg for BBO 520
Weight per kWp 44.8 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 TOPCon TOPCon Same
Cell type Monocrystalline Monocrystalline Same
Cell count 120 108 12 cells apart
Bifacial No No Same
04

Against the whole database

14,005 panels
Efficiency
#716 vs #1,306
BGO 580 leads by 590 places
Power density
#848 vs #1,328
BGO 580 leads by 480 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#542 vs #635
BGO 580 leads by 93 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#1,317 vs #2,878
BGO 580 leads by 1,561 places
05

More useful comparisons

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06

Written summary

07

Questions about this pairing

Which panel is better: Bisol BGO 580 or Bisol BBO 520?
According to our database: Bisol BGO 580 has higher module efficiency (23.50% vs 23.20%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Bisol BGO 580 and Bisol BBO 520?
Bisol BGO 580 has a module efficiency of 23.50%, 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 BGO 580 use vs Bisol BBO 520?
Bisol BGO 580 uses TOPCon 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 BGO 580 and Bisol BBO 520?
Bisol BGO 580 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.