Ulica Solar UL-505M-120BDGN vs Ulica Solar UL-445M-108BDGN
VS
The verdict
505M-120BDGN leads on the differences that matter
The largest is rated power: 60 W more power. 10 of 19 comparable parameters are identical.
See all 9 differencesHow alike are they
10
of 19 comparable
parameters are identical
parameters are identical
identical
differs
01
9 of 19 parameters
What actually differs
Parameter
505M-120BDGN
445M-108BDGN
Difference
Rated power
505 Wp
445 Wp
60 W more power
Module efficiency
22.81 %
22.27 %
0.54 pp more efficient
Open-circuit voltage
43.94 V
39.58 V
4.36 V apart
Module area
2.214 m²
1.998 m²
0.215 m² apart
Weight
26.5 kg
24.0 kg
2.5 kg lighter
Power density
228.1 Wp/m²
222.7 Wp/m²
5.4 Wp/m² higher
Voltage at max power
37.18 V
33.02 V
4.16 V apart
Cell count
120
108
12 cells 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
445M-108BDGN
14,931 kWh
Lifetime gap
2,013 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario
505M-120BDGN
445M-108BDGN
Standard test conditions
25 °C
100.0% of rated power
505 W
445 W
Cool, bright day
40 °C
95.7% of rated power
483 W
426 W
Typical summer roof
55 °C
91.3% of rated power
461 W
406 W
Hot roof
70 °C
87.0% of rated power
439 W
387 W
03
Full specification
Parameter
505M-120BDGN
445M-108BDGN
Difference
Power and efficiency
Rated power
505 Wp
445 Wp
+60 W for 505M-120BDGN
Module efficiency
22.81 %
22.27 %
+0.54 pp for 505M-120BDGN
Power density
228.1 Wp/m²
222.7 Wp/m²
+5.4 Wp/m² for 505M-120BDGN
Open-circuit voltage
43.94 V
39.58 V
4.36 V apart
Voltage at max power
37.18 V
33.02 V
4.16 V apart
Short-circuit current
14.54 A
14.30 A
Effectively the same
Current at max power
13.58 A
13.48 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 445M-108BDGN
Weight per kWp
52.5 kg/kWp
53.9 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
14,005 panels
Against the whole database
Efficiency
#2,711
vs
#5,481
505M-120BDGN leads by 2,770 places
Power density
#2,755
vs
#5,302
505M-120BDGN leads by 2,547 places
Heat behaviour
#2,165
vs
#2,165
Tied - the same position in the database
Weight
#6,016
vs
#8,086
505M-120BDGN leads by 2,070 places
Warranty
#21
vs
#21
Tied - the same position in the database
Overall
#6,015
vs
#8,949
505M-120BDGN leads by 2,934 places
05
Open the full database
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06
Written summary
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07
Questions about this pairing
Which panel is better: Ulica Solar UL-505M-120BDGN or Ulica Solar UL-445M-108BDGN?
According to our database: Ulica Solar UL-505M-120BDGN has higher module efficiency (22.81% vs 22.27%). 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-445M-108BDGN?
Ulica Solar UL-505M-120BDGN has a module efficiency of 22.81%, while Ulica Solar UL-445M-108BDGN is 22.27%. 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-445M-108BDGN?
Ulica Solar UL-505M-120BDGN uses TOPCon cells; Ulica Solar UL-445M-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-445M-108BDGN?
Ulica Solar UL-505M-120BDGN has a 30 years power warranty; Ulica Solar UL-445M-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-445M-108BDGN bifacial panels?
Both Ulica Solar UL-505M-120BDGN and Ulica Solar UL-445M-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.
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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.