--- title: "Ulica Solar UL-590M-144ADGN 590W Solar Panel - Specs & Review | ComparePV" description: "Ulica Solar UL-590M-144ADGN 590W solar panel. Specs: 22.84% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ulica-solar-ul-590m-144adgn" updated: 2026-09-11 --- # Ulica Solar UL-590M-144ADGN Efficiency leader, no clear weak spot 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Ulica Solar - **Model:** UL-590M-144ADGN - **Series:** TOPCon (N TYPE) 580~595Watt - **Rated power:** 590 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 590 W | 580 W | Strong - top 18% | | | Module efficiency | 22.84% | 22.44% | Strong - top 15% | 2,617 | | Power density | 228.4 | 224.4 | Strong - top 17% | 2,598 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 30.6 kg | 31.2 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.84% | 22.44% | Strong - top 15% | 2,617 | | Power density | 228.4 | 224.4 | Strong - top 17% | 2,598 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 51.9 | 53.8 | Typical | 5,287 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **22.84% module efficiency** - Top 15% of the TOPCon 550-600 W segment, against a median of 22.44%. - **228.4 watts per square metre** - Top 17% of the TOPCon 550-600 W segment, against a median of 224.4. - **Best for:** Commercial, utility-scale and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 590 W - **Efficiency:** 22.84 % - **Voltage at Pmax (Vmp):** 44.35 V - **Current at Pmax (Imp):** 13.30 A - **Open-circuit voltage (Voc):** 52.82 V - **Short-circuit current (Isc):** 14.02 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 144 - **Bifacial:** yes - **Bifacial gain:** 30.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 30.6 kg - **Area:** 2.58 m2 - **Power density:** 228.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 516 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2617 of 14005 | | Power density | 2598 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 5287 of 14005 | | Warranty | 21 of 14005 | ## About this series Ulica Solar TOPCon (N-TYPE) panels with a power output of 580-595W are the answer to growing efficiency requirements, utilizing **advanced N-type cell technology** that effectively eliminates light-induced degradation. Thanks to the use of TOPCon architecture, these modules offer significantly higher energy conversion efficiency than traditional older generation solutions, allowing for the maximization of yields from every square meter of the roof. This series stands out with an **excellent temperature coefficient**, which guarantees stable energy production and lower power losses even during extreme summer heat. For system owners, **increased performance under low light conditions** is also key, ensuring real yields early in the morning, at dusk, and on heavily cloudy days. The high unit power of up to 595W makes this solution primarily dedicated to large commercial projects and solar farms, where the priority is the **optimization of BOS system costs** and cabling. They are distinguished from the competition by their exceptional resistance to degradation over time, which translates into the longevity of the entire investment and the lowest levelized cost of energy. This is a proposal for investors who focus on innovations that realistically increase the profitability of a photovoltaic system in Polish climatic conditions. ## Notable figures - At 22.8% efficiency, this panel is on par with typical \*\*TOPCon 550-600W\*\* modules - 228.4 W/m² power density - 4.0 W/m² more than \*\*TOPCon 550-600W\*\* median (224.4 W/m²), more power per roof area - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 550-600W\*\* median - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - In the top 19% for efficiency among all TOPCon panels ## Questions ### How much extra energy can you actually gain from the bifacial design of Ulica Solar TOPCon 580-595W panels? Thanks to the dual-glass construction and N-type cells, these panels capture light reflected off the ground from both the front and rear side of the module. Depending on the albedo of the surface beneath the array (light gravel, white roofing, snow), the extra rear-side yield can range from 5% up to 25-30%. The biggest gains come from ground-mounted racking or flat roofs with reflective coating, where the panel's underside has unobstructed access to reflected light. ### Do Ulica Solar TOPCon 595W panels perform well in high summer temperatures? Yes. TOPCon N-type technology has a lower power temperature coefficient (around -0.29%/°C) compared to conventional PERC P-type panels (around -0.35% to -0.40%/°C). This means that as cell temperature rises above 25°C, the module loses less power, resulting in higher energy yield during hot, sunny days typical of Polish summers. ### What warranty exactly comes with the Ulica Solar TOPCon 580-595W series? The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty guaranteeing a minimum retained output over the years of operation. This exceeds the market standard for older-generation panels (typically 12/25 years), lowering the levelized cost of energy (LCOE) and improving the long-term security of the investment. ### Is Ulica Solar a Tier 1 manufacturer, and will banks finance an installation using these panels? Ulica Solar is not currently listed as a Tier 1 manufacturer under the BloombergNEF classification, despite operating its own production lines and having years of experience (the company was founded in 2006 and is headquartered in China). In practice, this may prompt additional questions from some banks or leasing companies when financing large commercial projects — it's worth confirming directly with the financing institution before signing a contract. ### What kind of installations are the 595W TOPCon Ulica Solar panels best suited for? Given the high unit power and larger dimensions typical of 144-cell modules, this series is designed mainly for large industrial roofs, commercial buildings, and solar farms, where fewer, higher-power panels reduce wiring, mounting structure, and labor (BoS) costs. For typical single-family homes with smaller sloped roof areas, more compact, lower-power modules are usually a better fit. ### How do TOPCon N-type panels differ from older PERC P-type panels in terms of degradation? The N-type cells used in this series are far less prone to light-induced degradation (LID) and light- and elevated-temperature-induced degradation (LeTID), which in older PERC P-type panels can reduce power by as much as 2-3% in the first year of operation. As a result, Ulica Solar TOPCon panels retain higher efficiency throughout their service life, delivering genuinely higher energy yields over a 25-30 year horizon. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ulica-solar-n-type-topcon-2278mm-580-595w-bifacial-silver-fr-a4c224b10939.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | -30 W, lighter, +2.0 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, lighter, +2.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -35 W, lighter, +1.8 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +45 W, lighter, +1.8 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, cooler, +1.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | -40 W, lighter, +1.6 pp | | [Ulica Solar UL-540M-144HV](https://comparepv.com/panel/ulica-solar-ul-540m-144hv) | 540 W | -50 W, hotter, -2.0 pp | | [Ulica Solar UL-545M-144HV](https://comparepv.com/panel/ulica-solar-ul-545m-144hv) | 545 W | Hotter, -1.8 pp, -5 yr warranty | | [Ulica Solar UL-550M-144HV](https://comparepv.com/panel/ulica-solar-ul-550m-144hv) | 550 W | Hotter, -1.6 pp, -5 yr warranty | | [Ulica Solar UL-555M-144HV](https://comparepv.com/panel/ulica-solar-ul-555m-144hv) | 555 W | Hotter, -1.4 pp, -5 yr warranty | | [Ulica Solar TSM144-9-570-595BNDG (570W)](https://comparepv.com/panel/ulica-solar-tsm144-9-570-595bndg-570w) | 570 W | -20 W, -0.7 pp | | [Ulica Solar TSM144-9-570-595BNDG (575W)](https://comparepv.com/panel/ulica-solar-tsm144-9-570-595bndg-575w) | 575 W | -15 W, -0.5 pp | | [Ulica Solar UL-580M-144ADGN](https://comparepv.com/panel/ulica-solar-ul-580m-144adgn) | 580 W | -10 W, -0.4 pp | | [Ulica Solar UL-585M-144ADGN](https://comparepv.com/panel/ulica-solar-ul-585m-144adgn) | 585 W | Very close match | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +60 W, lighter, +2.4 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +55 W, lighter, +2.2 pp | --- Source: https://comparepv.com/panel/ulica-solar-ul-590m-144adgn Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.