Bisol BGO 570 vs Bisol BBO 520
VS
The verdict
BGO 570 leads on the differences that matter
The largest is rated power: 50 W more power. 12 of 19 comparable parameters are identical.
See all 7 differencesHow alike are they
12
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
7 of 19 parameters
What actually differs
Parameter
BGO 570
BBO 520
Difference
Rated power
570 Wp
520 Wp
50 W more power
Open-circuit voltage
44.70 V
40.60 V
4.10 V apart
Module area
2.469 m²
2.240 m²
0.229 m² apart
Weight
26.0 kg
23.5 kg
2.5 kg lighter
Cell count
120
108
12 cells apart
Voltage at max power
37.50 V
33.80 V
3.70 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 570
19,392 kWh
BBO 520
17,691 kWh
Lifetime gap
1,701 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
BGO 570
BBO 520
Standard test conditions
25 °C
100.0% of rated power
570 W
520 W
Cool, bright day
40 °C
95.7% of rated power
545 W
497 W
Typical summer roof
55 °C
91.3% of rated power
520 W
475 W
Hot roof
70 °C
87.0% of rated power
496 W
452 W
03
Full specification
Parameter
BGO 570
BBO 520
Difference
Power and efficiency
Rated power
570 Wp
520 Wp
+50 W for BGO 570
Module efficiency
23.10 %
23.20 %
Effectively the same
Power density
230.9 Wp/m²
232.2 Wp/m²
Effectively the same
Open-circuit voltage
44.70 V
40.60 V
4.10 V apart
Voltage at max power
37.50 V
33.80 V
3.70 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
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
45.6 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
14,005 panels
Against the whole database
Efficiency
#1,570
vs
#1,306
BBO 520 leads by 264 places
Power density
#1,637
vs
#1,328
BBO 520 leads by 309 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#777
vs
#635
BBO 520 leads by 142 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#1,703
vs
#2,878
BGO 570 leads by 1,175 places
05
Open the full database
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06
Written summary
Checking cache...
07
Questions about this pairing
Which panel is better: Bisol BGO 570 or Bisol BBO 520?
According to our database: Bisol BBO 520 has higher module efficiency (23.20% vs 23.10%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Bisol BGO 570 and Bisol BBO 520?
Bisol BGO 570 has a module efficiency of 23.10%, 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 570 use vs Bisol BBO 520?
Bisol BGO 570 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 570 and Bisol BBO 520?
Bisol BGO 570 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.