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UL-665M-132DG vs TSM156-9-620BNDG 5 of 19 identical Swap Change panels

Ulica Solar UL-665M-132DG vs Ulica Solar TSM156-9-620BNDG

Ulica Solar
UL-665M-132DG
665 Wp 21.41 % TOPCon Bifacial
Open panel page Datasheet PDF
VS
Ulica Solar
TSM156-9-620BNDG
620 Wp 22.20 % TOPCon Bifacial
Open panel page Datasheet PDF
The verdict

TSM156-9-620BNDG leads on the differences that matter

The largest is temperature coefficient: 0.050 %/°C better in heat. 5 of 19 comparable parameters are identical.

See all 14 differences
How alike are they
5 of 19 comparable
parameters are identical
identical differs
01

What actually differs

14 of 19 parameters
Parameter UL-665M-132DG TSM156-9-620BNDG Difference
Temperature coefficient -0.340 %/°C -0.290 %/°C 0.050 %/°C better in heat
Module efficiency 21.41 % 22.20 % 0.79 pp more efficient
Rated power 665 Wp 620 Wp 45 W more power
Product warranty 12 yrs 5 yrs 7 yrs longer
Weight 37.3 kg 33.5 kg 3.8 kg lighter
Power density 214.1 Wp/m² 221.8 Wp/m² 7.7 Wp/m² higher
Open-circuit voltage 45.80 V 55.82 V 10.02 V apart
Short-circuit current 18.53 A 14.16 A 4.37 A apart
Module area 3.106 m² 2.795 m² 0.311 m² apart
Voltage at max power 38.30 V 46.67 V 8.37 V apart
Current at max power 17.36 A 13.30 A 4.06 A apart
Cell count 132 156 24 cells apart
Weight per kWp 56.1 kg/kWp 54.0 kg/kWp 2.1 kg/kWp lighter
Dimensions 2384x1303x35 mm 2465x1134x30 mm 2384x1303x35 mm vs 2465x1134x30 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
UL-665M-132DG
22,312 kWh
TSM156-9-620BNDG
20,802 kWh
Lifetime gap
1,510 kWh
Output when it is hot
Rated power carried across the range a module actually sees
Scenario UL-665M-132DG TSM156-9-620BNDG
Standard test conditions 25 °C 100.0% of rated power 665 W 620 W
Cool, bright day 40 °C 94.9% of rated power 631 W 593 W
Typical summer roof 55 °C 89.8% of rated power 597 W 566 W
Hot roof 70 °C 84.7% of rated power 563 W 539 W
03

Full specification

Parameter UL-665M-132DG TSM156-9-620BNDG Difference
Power and efficiency
Rated power 665 Wp 620 Wp +45 W for UL-665M-132DG
Module efficiency 21.41 % 22.20 % +0.79 pp for TSM156-9-620BNDG
Power density 214.1 Wp/m² 221.8 Wp/m² +7.7 Wp/m² for TSM156-9-620BNDG
Open-circuit voltage 45.80 V 55.82 V 10.02 V apart
Voltage at max power 38.30 V 46.67 V 8.37 V apart
Short-circuit current 18.53 A 14.16 A 4.37 A apart
Current at max power 17.36 A 13.30 A 4.06 A apart
Temperature
Temperature coefficient -0.340 %/°C -0.290 %/°C +0.050 %/°C for TSM156-9-620BNDG
Mechanical
Dimensions 2384x1303x35 mm 2465x1134x30 mm 2384x1303x35 mm vs 2465x1134x30 mm
Module area 3.106 m² 2.795 m² 0.311 m² apart
Weight 37.3 kg 33.5 kg -3.8 kg for TSM156-9-620BNDG
Weight per kWp 56.1 kg/kWp 54.0 kg/kWp -2.1 kg/kWp for TSM156-9-620BNDG
Warranty and degradation
Product warranty 12 yrs 5 yrs +7 yrs for UL-665M-132DG
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 132 156 24 cells apart
Bifacial Yes Yes Same
04

Against the whole database

14,005 panels
Efficiency
#8,280 vs #5,817
TSM156-9-620BNDG leads by 2,463 places
Power density
#8,250 vs #5,869
TSM156-9-620BNDG leads by 2,381 places
Heat behaviour
#8,778 vs #2,165
TSM156-9-620BNDG leads by 6,613 places
Weight
#10,380 vs #8,248
TSM156-9-620BNDG leads by 2,132 places
Warranty
#21 vs #21
Tied - the same position in the database
Overall
#2,787 vs #4,849
UL-665M-132DG leads by 2,062 places
05

More useful comparisons

Open the full database
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06

Written summary

07

Questions about this pairing

Which panel is better: Ulica Solar UL-665M-132DG or Ulica Solar TSM156-9-620BNDG?
According to our database: Ulica Solar TSM156-9-620BNDG has higher module efficiency (22.20% vs 21.41%); Ulica Solar TSM156-9-620BNDG tolerates heat better (temp coeff -0.290%/°C vs -0.340%/°C). See the full spec comparison and 30-year energy simulation above for a complete picture.
What is the efficiency of Ulica Solar UL-665M-132DG and Ulica Solar TSM156-9-620BNDG?
Ulica Solar UL-665M-132DG has a module efficiency of 21.41%, while Ulica Solar TSM156-9-620BNDG is 22.20%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Ulica Solar UL-665M-132DG use vs Ulica Solar TSM156-9-620BNDG?
Ulica Solar UL-665M-132DG uses TOPCon cells; Ulica Solar TSM156-9-620BNDG 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-665M-132DG and Ulica Solar TSM156-9-620BNDG?
Ulica Solar UL-665M-132DG has a 30 years power warranty; Ulica Solar TSM156-9-620BNDG 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-665M-132DG and Ulica Solar TSM156-9-620BNDG bifacial panels?
Both Ulica Solar UL-665M-132DG and Ulica Solar TSM156-9-620BNDG 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.