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

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

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

Full specification

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

Against the whole database

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

More useful comparisons

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The same specification on paper
06

Written summary

07

Questions about this pairing

Which panel is better: Ulica Solar TSM156-9-620BNDG or Ulica Solar UL-665M-132DG?
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 TSM156-9-620BNDG and Ulica Solar UL-665M-132DG?
Ulica Solar TSM156-9-620BNDG has a module efficiency of 22.20%, while Ulica Solar UL-665M-132DG is 21.41%. Higher efficiency means more electricity from the same roof area - useful when space is limited.
What cell technology does Ulica Solar TSM156-9-620BNDG use vs Ulica Solar UL-665M-132DG?
Ulica Solar TSM156-9-620BNDG uses TOPCon cells; Ulica Solar UL-665M-132DG 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 TSM156-9-620BNDG and Ulica Solar UL-665M-132DG?
Ulica Solar TSM156-9-620BNDG has a 30 years power warranty; Ulica Solar UL-665M-132DG 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 TSM156-9-620BNDG and Ulica Solar UL-665M-132DG bifacial panels?
Both Ulica Solar TSM156-9-620BNDG and Ulica Solar UL-665M-132DG 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.