--- title: "Ulica Solar TSM156-9-620BNDG vs Ulica Solar UL-665M-132DG - Solar Panel Comparison | ComparePV" description: "Compare Ulica Solar TSM156-9-620BNDG vs Ulica Solar UL-665M-132DG side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/ulica-solar-tsm156-9-620bndg/ulica-solar-ul-665m-132dg" updated: 2026-09-11 --- # Ulica Solar TSM156-9-620BNDG vs Ulica Solar UL-665M-132DG 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. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Ulica Solar TSM156-9-620BNDG](https://comparepv.com/panel/ulica-solar-tsm156-9-620bndg) | [Ulica Solar UL-665M-132DG](https://comparepv.com/panel/ulica-solar-ul-665m-132dg) | | Manufacturer | Ulica Solar | Ulica Solar | | Power | 620 Wp | 665 Wp | | Efficiency | 22.20 % | 21.41 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | TSM156-9-620BNDG | UL-665M-132DG | Difference | | --- | --- | --- | --- | | Temperature coefficient | -0.290 %/°C | -0.340 %/°C | +0.050 %/°C for TSM156-9-620BNDG | | Module efficiency | 22.20 % | 21.41 % | +0.79 pp for TSM156-9-620BNDG | | Rated power | 620 Wp | 665 Wp | +45 W for UL-665M-132DG | | Product warranty | 5 yrs | 12 yrs | +7 yrs for UL-665M-132DG | | Weight | 33.5 kg | 37.3 kg | -3.8 kg 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 | | 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 for TSM156-9-620BNDG | | Dimensions | 2465x1134x30 mm | 2384x1303x35 mm | 2465x1134x30 mm vs 2384x1303x35 mm | ## Every compared parameter | Parameter | TSM156-9-620BNDG | UL-665M-132DG | | --- | --- | --- | | Rated power | 620 Wp | 665 Wp | | Module efficiency | 22.20 % | 21.41 % | | Power density | 221.8 Wp/m² | 214.1 Wp/m² | | Open-circuit voltage | 55.82 V | 45.80 V | | Voltage at max power | 46.67 V | 38.30 V | | Short-circuit current | 14.16 A | 18.53 A | | Current at max power | 13.30 A | 17.36 A | | Temperature coefficient | -0.290 %/°C | -0.340 %/°C | | Dimensions | 2465x1134x30 mm | 2384x1303x35 mm | | Module area | 2.795 m² | 3.106 m² | | Weight | 33.5 kg | 37.3 kg | | Weight per kWp | 54.0 kg/kWp | 56.1 kg/kWp | | Product warranty | 5 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, TSM156-9-620BNDG:** 20,802 kWh - **Cumulative output, UL-665M-132DG:** 22,312 kWh - **Gap:** 1,510 kWh ## Output when hot | Condition | Cell temperature | TSM156-9-620BNDG | UL-665M-132DG | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 620 W | 665 W | 100.0% of rated power | | Cool, bright day | 40 °C | 593 W | 631 W | 94.9% of rated power | | Typical summer roof | 55 °C | 566 W | 597 W | 89.8% of rated power | | Hot roof | 70 °C | 539 W | 563 W | 84.7% of rated power | ## Against the whole database | Measure | TSM156-9-620BNDG | UL-665M-132DG | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,817 | #8,280 | 14,005 | TSM156-9-620BNDG leads by 2,463 places | | Power density | #5,869 | #8,250 | 14,005 | TSM156-9-620BNDG leads by 2,381 places | | Heat behaviour | #2,165 | #8,778 | 14,005 | TSM156-9-620BNDG leads by 6,613 places | | Weight | #8,248 | #10,380 | 14,005 | TSM156-9-620BNDG leads by 2,132 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #4,849 | #2,787 | 14,005 | UL-665M-132DG leads by 2,062 places | ## Questions ### 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. ## Related comparisons - [Ulica Solar TSM156-9-620BNDG vs Ulica Solar TSM156-9-645BNDG](https://comparepv.com/compare/ulica-solar-tsm156-9-620bndg/ulica-solar-tsm156-9-645bndg) - 4 differences, the largest is module efficiency - [Ulica Solar TSM156-9-620BNDG vs Ulica Solar TSM156-9-640BNDG](https://comparepv.com/compare/ulica-solar-tsm156-9-620bndg/ulica-solar-tsm156-9-640bndg) - 3 differences, the largest is module efficiency - [Ulica Solar TSM156-9-620BNDG vs Ulica Solar TSM156-9-635BNDG](https://comparepv.com/compare/ulica-solar-tsm156-9-620bndg/ulica-solar-tsm156-9-635bndg) - 3 differences, the largest is module efficiency - [Ulica Solar TSM156-9-620BNDG vs Ulica Solar TSM156-9-630BNDG](https://comparepv.com/compare/ulica-solar-tsm156-9-620bndg/ulica-solar-tsm156-9-630bndg) - 3 differences, the largest is module efficiency - [Ulica Solar TSM156-9-620BNDG vs Ulica Solar TSM156-9-625BNDG](https://comparepv.com/compare/ulica-solar-tsm156-9-620bndg/ulica-solar-tsm156-9-625bndg) - One difference: module efficiency - [Ulica Solar UL-665M-132DG vs Ulica Solar UL-670M-132DG](https://comparepv.com/compare/ulica-solar-ul-665m-132dg/ulica-solar-ul-670m-132dg) - The same specification on paper --- Source: https://comparepv.com/compare/ulica-solar-tsm156-9-620bndg/ulica-solar-ul-665m-132dg Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.