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450M-108BDGN vs 505M-120BDGN 11 of 19 identical Swap Change panels

Ulica Solar UL-450M-108BDGN vs Ulica Solar UL-505M-120BDGN

Ulica Solar UL-450M-108BDGN
Ulica Solar
UL-450M-108BDGN
450 Wp 22.52 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Ulica Solar
UL-505M-120BDGN
505 Wp 22.81 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

505M-120BDGN leads on the differences that matter

The largest is rated power: 55 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 450M-108BDGN 505M-120BDGN Difference
Rated power 450 Wp 505 Wp 55 W more power
Open-circuit voltage 39.78 V 43.94 V 4.16 V apart
Module area 1.998 m² 2.214 m² 0.215 m² apart
Weight 24.0 kg 26.5 kg 2.5 kg lighter
Module efficiency 22.52 % 22.81 % 0.29 pp more efficient
Cell count 108 120 12 cells apart
Voltage at max power 33.22 V 37.18 V 3.96 V apart
Dimensions 1762x1134x30 mm 1952x1134x30 mm 1762x1134x30 mm vs 1952x1134x30 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.
450M-108BDGN
15,098 kWh
505M-120BDGN
16,944 kWh
Lifetime gap
1,846 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario 450M-108BDGN 505M-120BDGN
Standard test conditions 25 °C 100.0% of rated power 450 W 505 W
Cool, bright day 40 °C 95.7% of rated power 430 W 483 W
Typical summer roof 55 °C 91.3% of rated power 411 W 461 W
Hot roof 70 °C 87.0% of rated power 391 W 439 W
03

Full specification

Parameter 450M-108BDGN 505M-120BDGN Difference
Power and efficiency
Rated power 450 Wp 505 Wp +55 W for 505M-120BDGN
Module efficiency 22.52 % 22.81 % +0.29 pp for 505M-120BDGN
Power density 225.2 Wp/m² 228.1 Wp/m² Effectively the same
Open-circuit voltage 39.78 V 43.94 V 4.16 V apart
Voltage at max power 33.22 V 37.18 V 3.96 V apart
Short-circuit current 14.38 A 14.54 A Effectively the same
Current at max power 13.55 A 13.58 A Effectively the same
Temperature
Temperature coefficient -0.290 %/°C -0.290 %/°C Same
Mechanical
Dimensions 1762x1134x30 mm 1952x1134x30 mm 1762x1134x30 mm vs 1952x1134x30 mm
Module area 1.998 m² 2.214 m² 0.215 m² apart
Weight 24.0 kg 26.5 kg -2.5 kg for 450M-108BDGN
Weight per kWp 53.3 kg/kWp 52.5 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 108 120 12 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#4,108 vs #2,711
505M-120BDGN leads by 1,397 places
Power density
#4,225 vs #2,755
505M-120BDGN leads by 1,470 places
Heat behaviour
#2,165 vs #2,165
Tied - the same position in the database
Weight
#7,178 vs #6,016
505M-120BDGN leads by 1,162 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#8,449 vs #6,015
505M-120BDGN leads by 2,434 places
05

More useful comparisons

Open the full database
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Ulica Solar UL-450M-108BDGN vs Ulica Solar UL-495M-120BDGN
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Ulica Solar UL-450M-108BDGN vs Ulica Solar UL-490M-120BDGN
9 differences, the largest is rated power
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Ulica Solar UL-450M-108BDGN vs Ulica Solar UL-460M-108BDGN
3 differences, the largest is module efficiency
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Ulica Solar UL-450M-108BDGN vs Ulica Solar UL-455M-108BDGN
One difference: module efficiency
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Ulica Solar UL-450M-108BDGN vs Ulica Solar UL-445M-108BDGN
One difference: module efficiency
06

Written summary

07

Questions about this pairing

Which panel is better: Ulica Solar UL-450M-108BDGN or Ulica Solar UL-505M-120BDGN?
According to our database: Ulica Solar UL-505M-120BDGN has higher module efficiency (22.81% vs 22.52%). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Ulica Solar UL-450M-108BDGN and Ulica Solar UL-505M-120BDGN?
Ulica Solar UL-450M-108BDGN has a module efficiency of 22.52%, while Ulica Solar UL-505M-120BDGN is 22.81%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Ulica Solar UL-450M-108BDGN use vs Ulica Solar UL-505M-120BDGN?
Ulica Solar UL-450M-108BDGN uses TOPCon cells; Ulica Solar UL-505M-120BDGN 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-450M-108BDGN and Ulica Solar UL-505M-120BDGN?
Ulica Solar UL-450M-108BDGN has a 30 years power warranty; Ulica Solar UL-505M-120BDGN 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-450M-108BDGN and Ulica Solar UL-505M-120BDGN bifacial panels?
Both Ulica Solar UL-450M-108BDGN and Ulica Solar UL-505M-120BDGN 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.

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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.