--- title: "Ulica Solar UL-665M-132DG vs Ulica Solar UL-670M-132DG - Solar Panel Comparison | ComparePV" description: "Compare Ulica Solar UL-665M-132DG vs Ulica Solar UL-670M-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-ul-665m-132dg/ulica-solar-ul-670m-132dg" updated: 2026-09-11 --- # Ulica Solar UL-665M-132DG vs Ulica Solar UL-670M-132DG Identical on every published parameter All 19 comparable parameters agree. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Ulica Solar UL-665M-132DG](https://comparepv.com/panel/ulica-solar-ul-665m-132dg) | [Ulica Solar UL-670M-132DG](https://comparepv.com/panel/ulica-solar-ul-670m-132dg) | | Manufacturer | Ulica Solar | Ulica Solar | | Power | 665 Wp | 670 Wp | | Efficiency | 21.41 % | 21.57 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | 665M-132DG | 670M-132DG | | --- | --- | --- | | Rated power | 665 Wp | 670 Wp | | Module efficiency | 21.41 % | 21.57 % | | Power density | 214.1 Wp/m² | 215.7 Wp/m² | | Open-circuit voltage | 45.80 V | 45.80 V | | Voltage at max power | 38.30 V | 38.40 V | | Short-circuit current | 18.53 A | 18.62 A | | Current at max power | 17.36 A | 17.45 A | | Temperature coefficient | -0.340 %/°C | -0.340 %/°C | | Dimensions | 2384x1303x35 mm | 2384x1303x35 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 37.3 kg | 37.3 kg | | Weight per kWp | 56.1 kg/kWp | 55.7 kg/kWp | | Product warranty | 12 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 | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, 665M-132DG:** 22,312 kWh - **Cumulative output, 670M-132DG:** 22,480 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | 665M-132DG | 670M-132DG | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 665 W | 670 W | 100.0% of rated power | | Cool, bright day | 40 °C | 631 W | 636 W | 94.9% of rated power | | Typical summer roof | 55 °C | 597 W | 602 W | 89.8% of rated power | | Hot roof | 70 °C | 563 W | 567 W | 84.7% of rated power | ## Against the whole database | Measure | 665M-132DG | 670M-132DG | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #8,280 | #7,734 | 14,005 | 670M-132DG leads by 546 places | | Power density | #8,250 | #7,644 | 14,005 | 670M-132DG leads by 606 places | | Heat behaviour | #8,778 | #8,778 | 14,005 | Tied - the same position in the database | | Weight | #10,380 | #10,048 | 14,005 | 670M-132DG leads by 332 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,787 | #2,486 | 14,005 | 670M-132DG leads by 301 places | ## Questions ### Which panel is better: Ulica Solar UL-665M-132DG or Ulica Solar UL-670M-132DG? According to our database: **Ulica Solar UL-670M-132DG** has higher module efficiency (**21.57%** vs **21.41%**). 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 UL-670M-132DG? **Ulica Solar UL-665M-132DG** has a module efficiency of **21.41%**, while **Ulica Solar UL-670M-132DG** is **21.57%**. 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 UL-670M-132DG? **Ulica Solar UL-665M-132DG** uses **TOPCon** cells; **Ulica Solar UL-670M-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 UL-665M-132DG and Ulica Solar UL-670M-132DG? **Ulica Solar UL-665M-132DG** has a **30 years** power warranty; **Ulica Solar UL-670M-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 UL-665M-132DG and Ulica Solar UL-670M-132DG bifacial panels? Both **Ulica Solar UL-665M-132DG** and **Ulica Solar UL-670M-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 UL-665M-132DG vs Ulica Solar UL-660M-132DG](https://comparepv.com/compare/ulica-solar-ul-665m-132dg/ulica-solar-ul-660m-132dg) - The same specification on paper - [Ulica Solar UL-665M-132DG vs Ulica Solar UL-655M-132DG](https://comparepv.com/compare/ulica-solar-ul-665m-132dg/ulica-solar-ul-655m-132dg) - 3 differences, the largest is module efficiency - [Ulica Solar UL-665M-132DG vs Ulica Solar UL-715M-132DGN](https://comparepv.com/compare/ulica-solar-ul-665m-132dg/ulica-solar-ul-715m-132dgn) - 9 differences, the largest is module efficiency - [Ulica Solar UL-665M-132DG vs Ulica Solar UL-710M-132DGN](https://comparepv.com/compare/ulica-solar-ul-665m-132dg/ulica-solar-ul-710m-132dgn) - 9 differences, the largest is module efficiency - [Ulica Solar UL-665M-132DG vs Ulica Solar UL-705M-132DGN](https://comparepv.com/compare/ulica-solar-ul-665m-132dg/ulica-solar-ul-705m-132dgn) - 9 differences, the largest is module efficiency - [Ulica Solar UL-665M-132DG vs Ulica Solar UL-700M-132DGN](https://comparepv.com/compare/ulica-solar-ul-665m-132dg/ulica-solar-ul-700m-132dgn) - 9 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/ulica-solar-ul-665m-132dg/ulica-solar-ul-670m-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.