Skip to main content
505M-120BDGN vs 455M-108BDGN 12 of 19 identical Swap Change panels

Ulica Solar UL-505M-120BDGN vs Ulica Solar UL-455M-108BDGN

Ulica Solar
UL-505M-120BDGN
505 Wp 22.81 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Ulica Solar UL-455M-108BDGN
Ulica Solar
UL-455M-108BDGN
455 Wp 22.77 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

505M-120BDGN 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 differences
How alike are they
12 of 19 comparable
parameters are identical
identical differs
01

What actually differs

7 of 19 parameters
Parameter 505M-120BDGN 455M-108BDGN Difference
Rated power 505 Wp 455 Wp 50 W more power
Module area 2.214 m² 1.998 m² 0.215 m² apart
Open-circuit voltage 43.94 V 39.98 V 3.96 V apart
Weight 26.5 kg 24.0 kg 2.5 kg lighter
Cell count 120 108 12 cells apart
Voltage at max power 37.18 V 33.42 V 3.76 V apart
Dimensions 1952x1134x30 mm 1762x1134x30 mm 1952x1134x30 mm vs 1762x1134x30 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.
505M-120BDGN
16,944 kWh
455M-108BDGN
15,266 kWh
Lifetime gap
1,678 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 505M-120BDGN 455M-108BDGN
Standard test conditions 25 °C 100.0% of rated power 505 W 455 W
Cool, bright day 40 °C 95.7% of rated power 483 W 435 W
Typical summer roof 55 °C 91.3% of rated power 461 W 415 W
Hot roof 70 °C 87.0% of rated power 439 W 396 W
03

Full specification

Parameter 505M-120BDGN 455M-108BDGN Difference
Power and efficiency
Rated power 505 Wp 455 Wp +50 W for 505M-120BDGN
Module efficiency 22.81 % 22.77 % Effectively the same
Power density 228.1 Wp/m² 227.7 Wp/m² Effectively the same
Open-circuit voltage 43.94 V 39.98 V 3.96 V apart
Voltage at max power 37.18 V 33.42 V 3.76 V apart
Short-circuit current 14.54 A 14.45 A Effectively the same
Current at max power 13.58 A 13.61 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1952x1134x30 mm 1762x1134x30 mm 1952x1134x30 mm vs 1762x1134x30 mm
Module area 2.214 m² 1.998 m² 0.215 m² apart
Weight 26.5 kg 24.0 kg -2.5 kg for 455M-108BDGN
Weight per kWp 52.5 kg/kWp 52.7 kg/kWp Effectively the same
Warranty and degradation
Product warranty 15 yrs 15 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 120 108 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#2,711 vs #3,073
505M-120BDGN leads by 362 places
Power density
#2,755 vs #2,888
505M-120BDGN leads by 133 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#6,016 vs #6,401
505M-120BDGN leads by 385 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#6,015 vs #7,936
505M-120BDGN leads by 1,921 places
05

More useful comparisons

Open the full database
Same series, other bin
Ulica Solar
Ulica Solar UL-505M-120BDGN vs Ulica Solar UL-500M-120BDGN
One difference: module efficiency
Same series, other bin
Ulica Solar
Ulica Solar UL-505M-120BDGN vs Ulica Solar UL-495M-120BDGN
3 differences, the largest is module efficiency
Same series, other bin
Ulica Solar
Ulica Solar UL-505M-120BDGN vs Ulica Solar UL-490M-120BDGN
3 differences, the largest is module efficiency
Same series, other bin
Ulica Solar
Ulica Solar UL-455M-108BDGN vs Ulica Solar UL-460M-108BDGN
One difference: module efficiency
Same series, other bin
Ulica Solar
Ulica Solar UL-455M-108BDGN vs Ulica Solar UL-450M-108BDGN
One difference: module efficiency
Same series, other bin
Ulica Solar
Ulica Solar UL-455M-108BDGN vs Ulica Solar UL-445M-108BDGN
3 differences, the largest is module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Ulica Solar UL-505M-120BDGN or Ulica Solar UL-455M-108BDGN?
According to our database: Ulica Solar UL-505M-120BDGN has higher module efficiency (22.81% vs 22.77%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Ulica Solar UL-505M-120BDGN and Ulica Solar UL-455M-108BDGN?
Ulica Solar UL-505M-120BDGN has a module efficiency of 22.81%, while Ulica Solar UL-455M-108BDGN is 22.77%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Ulica Solar UL-505M-120BDGN use vs Ulica Solar UL-455M-108BDGN?
Ulica Solar UL-505M-120BDGN uses TOPCon cells; Ulica Solar UL-455M-108BDGN 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 Ulica Solar UL-505M-120BDGN and Ulica Solar UL-455M-108BDGN?
Ulica Solar UL-505M-120BDGN has a 30 years power warranty; Ulica Solar UL-455M-108BDGN 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 Ulica Solar UL-505M-120BDGN and Ulica Solar UL-455M-108BDGN bifacial panels?
Both Ulica Solar UL-505M-120BDGN and Ulica Solar UL-455M-108BDGN 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.

Shop prices: See 8 Ulica Solar 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.