--- title: "Ulica Solar UL-550M-144HV 550W Solar Panel - Specs & Review | ComparePV" description: "Ulica Solar UL-550M-144HV 550W solar panel. Specs: 21.28% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ulica-solar-ul-550m-144hv" updated: 2026-09-11 --- # Ulica Solar UL-550M-144HV Middle of its segment, weak in heat 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Ulica Solar - **Model:** UL-550M-144HV - **Series:** MONO HALF-CUT - **Rated power:** 550 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 550 W | 580 W | Weak - bottom 2% | | | Module efficiency | 21.28% | 22.44% | Weak - bottom 3% | 8,795 | | Power density | 212.8 | 224.4 | Weak - bottom 3% | 8,643 | | Temperature coefficient | -0.360 | -0.290 | Weak - bottom 1% | 12,345 | | Weight (kg) | 28.3 kg | 31.2 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 5% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.28% | 22.44% | Weak - bottom 3% | 8,795 | | Power density | 212.8 | 224.4 | Weak - bottom 3% | 8,643 | | Temperature coefficient | -0.360 | -0.290 | Weak - bottom 1% | 12,345 | | Weight per kWp | 51.5 | 53.8 | Typical | 4,829 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 5% | 9,798 | ### Watch out for - **-0.360 %/°C temperature coefficient** - Bottom 1% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 12,345th in the whole database. - **21.28% module efficiency** - Bottom 3% of the TOPCon 550-600 W segment, against a median of 22.44%. Ranked 8,795th in the whole database. - **212.8 watts per square metre** - Bottom 3% of the TOPCon 550-600 W segment, against a median of 224.4. Ranked 8,643rd in the whole database. - **Best for:** Residential, commercial, shaded-installations and hot-climate. - **Not ideal for:** Hot climates, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 550 W - **Efficiency:** 21.28 % - **Voltage at Pmax (Vmp):** 41.90 V - **Current at Pmax (Imp):** 13.13 A - **Open-circuit voltage (Voc):** 50.00 V - **Short-circuit current (Isc):** 13.75 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.290 %/degC - **Temperature coefficient of Isc:** 0.049 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 144 ### Physical - **Length:** 2279 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 28.3 kg - **Area:** 2.58 m2 - **Power density:** 212.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 451 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8795 of 14005 | | Power density | 8643 of 14005 | | Temperature coefficient | 12345 of 14005 | | Weight | 4829 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Ulica Solar MONO HALF-CUT series utilizes advanced half-cut cell technology, which significantly reduces internal losses and improves the overall efficiency of the modules in real-world operating conditions. Thanks to the use of **Half-Cut technology**, these panels generate lower resistive losses and show significantly higher resistance to the disadvantageous phenomenon of partial shading, which is crucial for residential building roofs with complex geometry. This solution directly translates into more stable power production and **higher efficiency at high temperatures** due to a low temperature coefficient, which distinguishes this series from standard components. These products have been designed for investors seeking reliability and durability, which is confirmed by numerous certificates of resistance to extreme weather conditions, including ammonia corrosion and salt mist. The panels are characterized by **exceptional mechanical strength** against high snow and wind loads, ensuring the safety of the entire installation for decades. The use of modern monocrystalline cell architecture makes it an ideal choice for both home prosumers and large commercial systems. By investing in this series, the user receives an **optimal price-to-power ratio** while maintaining the quality standards of a global manufacturer from the prestigious Tier 1 list. This is a proven technology that effectively minimizes the risk of hot-spots and guarantees **maximum energy yield** from the available mounting surface. ## Notable figures - At 21.3% efficiency, this panel is 1.2pp below the \*\*TOPCon 550-600W\*\* median of 22.4% - Power density of 212.8 W/m² is 11.6 W/m² below \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - needs more roof space - -0.36%/°C temperature coefficient - 0.07pp worse than \*\*TOPCon 550-600W\*\* median (-0.29%/°C), expect higher hot weather losses - 28.3 kg weight - 2.9 kg lighter than \*\*TOPCon 550-600W\*\* median (31.2 kg), reducing installation effort - In the top 63% for efficiency among all TOPCon panels ## Questions ### What is Half-Cut technology in the Ulica Solar MONO HALF-CUT series and what real benefits does it offer? Half-Cut technology splits standard cells in half so current travels a shorter path, reducing resistive losses. In practice this means higher module efficiency, lower risk of hot-spots, and better performance under partial shading, for example from a chimney or antenna. For the customer this translates into more stable energy production throughout the year. ### What is the maximum power of a panel in the MONO HALF-CUT series, and how many panels are needed for a typical 10 kWp installation? The maximum power in this series is 550 Wp. Building a 10 kWp installation requires roughly 18 such panels, though the exact number depends on the specific model within the series and available roof space. Panels based on TOPCon technology maintain high efficiency even with fewer modules than older PERC-based solutions. ### How does TOPCon cell technology used in this series differ from older PERC technology? TOPCon is a newer N-type cell technology that reduces carrier recombination on the rear side of the cell through an additional passivation layer. Compared to PERC, it delivers higher efficiency, a lower annual degradation rate, and better performance at high temperatures. For the user, this means more energy generated from the same roof area, especially during summer. ### What warranty comes with Ulica Solar MONO HALF-CUT panels and what exactly does it cover? The manufacturer provides a 12-year product warranty covering material and workmanship defects, along with a 25-year power output warranty guaranteeing a minimum level of energy production over time. This is a standard warranty period for reputable Asian manufacturers and is sufficient to cover the typical payback period of a solar installation. ### Are Ulica Solar MONO HALF-CUT panels bifacial, generating power from both sides? No, this specific MONO HALF-CUT series uses standard monofacial modules. This means energy production occurs only from the front side of the panel, which is a simpler and cheaper solution to install than bifacial panels, but without the additional energy gain from reflected light off the ground. ### Is Ulica Solar a Tier 1 manufacturer, and is it worth investing in panels outside that list? Ulica Solar does not currently appear on the Tier 1 list compiled by Bloomberg NEF, which mainly reflects bank financing scale rather than product quality. The company is headquartered in China and holds certifications for resistance to harsh conditions, including ammonia corrosion and salt mist, confirming solid build quality despite the lack of Tier 1 status. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Ulica_540-550W_UL-540-545-550M-144HV-a4000f1cb5c3.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +3.7 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, +3.4 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +3.3 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | -50 W, cooler, +3.2 pp | | [Ulica Solar UL-540M-144HV](https://comparepv.com/panel/ulica-solar-ul-540m-144hv) | 540 W | -10 W, -0.4 pp | | [Ulica Solar UL-545M-144HV](https://comparepv.com/panel/ulica-solar-ul-545m-144hv) | 545 W | Very close match | | [Ulica Solar UL-555M-144HV](https://comparepv.com/panel/ulica-solar-ul-555m-144hv) | 555 W | Cooler | | [Ulica Solar TSM144-9-570-595BNDG (570W)](https://comparepv.com/panel/ulica-solar-tsm144-9-570-595bndg-570w) | 570 W | Cooler, +0.8 pp, +5 yr warranty | | [Ulica Solar TSM144-9-570-595BNDG (575W)](https://comparepv.com/panel/ulica-solar-tsm144-9-570-595bndg-575w) | 575 W | Cooler, +1.0 pp, +5 yr warranty | | [Ulica Solar UL-580M-144ADGN](https://comparepv.com/panel/ulica-solar-ul-580m-144adgn) | 580 W | Cooler, +1.2 pp, +5 yr warranty | | [Ulica Solar UL-585M-144ADGN](https://comparepv.com/panel/ulica-solar-ul-585m-144adgn) | 585 W | Cooler, +1.4 pp, +5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +100 W, cooler, +3.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +85 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/ulica-solar-ul-550m-144hv Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.