--- title: "Ulica Solar UL-555M-144HV 555W Solar Panel - Specs & Review | ComparePV" description: "Ulica Solar UL-555M-144HV 555W solar panel. Specs: 21.48% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ulica-solar-ul-555m-144hv" updated: 2026-09-11 --- # Ulica Solar UL-555M-144HV Light for its output, weak in heat 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Ulica Solar - **Model:** UL-555M-144HV - **Series:** UL-545 \| 550 \| 555M-144HV - **Rated power:** 555 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) | 555 W | 580 W | Weak - bottom 5% | | | Module efficiency | 21.48% | 22.44% | Weak - bottom 6% | 8,152 | | Power density | 214.8 | 224.4 | Weak - bottom 6% | 8,148 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 5% | 8,778 | | Weight (kg) | 27.5 kg | 31.2 kg | Strong - top 25% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 5% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.48% | 22.44% | Weak - bottom 6% | 8,152 | | Power density | 214.8 | 224.4 | Weak - bottom 6% | 8,148 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 5% | 8,778 | | Weight per kWp | 49.5 | 53.8 | Strong - top 25% | 3,116 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 5% | 9,798 | ### Strengths - **49.5 kg per kWp** - Top 25% of the TOPCon 550-600 W segment, against a median of 53.8. ### Watch out for - **-0.340 %/°C temperature coefficient** - Bottom 5% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 8,778th in the whole database. - **25 year performance warranty** - Bottom 5% of the TOPCon 550-600 W segment, against a median of 30 yrs. Ranked 9,798th in the whole database. - **21.48% module efficiency** - Bottom 6% of the TOPCon 550-600 W segment, against a median of 22.44%. Ranked 8,152nd in the whole database. - **Best for:** Utility-scale, commercial, shaded-installations and hot-climate. - **Not ideal for:** Hot climates, owners who want a long output guarantee and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 555 W - **Efficiency:** 21.48 % - **Voltage at Pmax (Vmp):** 42.00 V - **Current at Pmax (Imp):** 13.21 A - **Open-circuit voltage (Voc):** 50.10 V - **Short-circuit current (Isc):** 13.83 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.265 %/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:** 27.5 kg - **Area:** 2.58 m2 - **Power density:** 214.8 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:** 455 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8152 of 14005 | | Power density | 8148 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 3116 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Ulica Solar UL-545 \| 550 \| 555M-144HV module series redefines performance standards in the large-format monocrystalline panel segment. The use of **Half-cut cell technology** combined with a Multi-busbar system significantly reduces resistive losses and minimizes the risk of micro-cracks during long-term operation. The uniqueness of this line is based on **high shading tolerance**, which allows for generating stable energy yields even in difficult installation conditions or with partial shading of the module. For investors, the key benefit is the **reduction of BOS system costs**, as the high power of a single panel translates into a smaller number of required mounting structures and cabling. These panels are primarily dedicated to photovoltaic farms and large commercial installations, where maximizing power per square meter is crucial. Compared to the competition, this series stands out with an **excellent temperature coefficient**, guaranteeing above-average efficiency on hot days. This is a solution for professionals focusing on proven mechanical durability and fire safety in the HV standard, making them the foundation of modern, profitable solar power plants. ## Notable figures - At 21.5% efficiency, this panel is 1.0pp below the \*\*TOPCon 550-600W\*\* median of 22.4% - At 214.8 W/m², this panel generates 9.7 W/m² less per unit area than \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - -0.34%/°C temperature coefficient - 0.05pp worse than \*\*TOPCon 550-600W\*\* median (-0.29%/°C), expect higher hot weather losses - Weight of 27.5 kg (3.7 kg below \*\*TOPCon 550-600W\*\* median of 31.2 kg) allows easier transport and roof mounting - #8152 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### What is the maximum power output of the Ulica Solar UL-545 \| 550 \| 555M-144HV series, and how do the variants differ? The series comes in three power classes - 545 Wp, 550 Wp, and 555 Wp - sharing the same physical construction and cell technology. The difference is purely a matter of production binning: higher-power modules have tighter positive tolerance and better individual electrical parameters. Which variant to choose depends on your budget and which bin your distributor has in stock at the time of purchase. ### What do half-cut cells and multi-busbar technology actually deliver in the UL-545\|550\|555M-144HV panels? Cutting cells in half lowers resistive current losses and spreads heat more evenly, making the module more efficient and less prone to microcrack damage from transport stress or snow load. The multi-busbar grid further reduces series resistance and keeps current collection stable even if a cell is partially compromised, resulting in higher and more consistent energy yield over the module's lifetime. ### What installations are the Ulica Solar UL-555M-144HV panels best suited for? This series is designed for solar farms and large commercial installations, where a high per-panel output (up to 555 Wp) reduces the number of mounting structures, cabling, and installation labor needed, lowering overall BoS costs. However, its large footprint and roughly 28 kg weight make manual handling on small pitched roofs impractical, so smaller, lighter modules from other series are a better fit for residential rooftops. ### What warranty applies to the Ulica Solar UL-545\|550\|555M-144HV series? The manufacturer offers a 12-year product warranty covering material and workmanship defects, plus a 25-year linear power warranty guaranteeing a defined percentage of rated output over that period. Note that actual warranty terms depend on the local distributor and country of purchase, so it's worth confirming the exact warranty service available in your market before investing. ### Are the UL-545\|550\|555M-144HV panels bifacial, generating extra power from the rear side? No, the UL-545 \| 550 \| 555M-144HV series consists of monofacial modules with a solid, opaque backsheet rather than bifacial panels. All energy generation happens on the front side only. If you want additional yield from reflected light, for example when mounting over light-colored ground or on ground-mount racking, consider the manufacturer's bifacial double-glass series instead. ### Is Ulica Solar a Tier 1 manufacturer, and does that matter for a large-scale installation? Ulica Solar, a China-based manufacturer, is not currently on the Bloomberg NEF Tier 1 list, which reflects lower bank financing scale rather than lower product quality per se. This doesn't automatically mean inferior panels, but for large commercial and utility-scale projects financed through bank loans, it's worth checking, since some lenders and investors require Tier 1-listed modules as a financing condition. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ulica-mono-perc-2279mm-mm-545-555w-silver-frame-240115-86eb09dfb8ce.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +3.3 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -50 W, cooler, +3.2 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +3.1 pp, +5 yr warranty | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, lighter, +2.9 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | Cooler, +2.9 pp, +5 yr warranty | | [Ulica Solar UL-540M-144HV](https://comparepv.com/panel/ulica-solar-ul-540m-144hv) | 540 W | -15 W, hotter, -0.6 pp | | [Ulica Solar UL-545M-144HV](https://comparepv.com/panel/ulica-solar-ul-545m-144hv) | 545 W | -10 W, hotter, -0.4 pp | | [Ulica Solar UL-550M-144HV](https://comparepv.com/panel/ulica-solar-ul-550m-144hv) | 550 W | Hotter | | [Ulica Solar TSM144-9-570-595BNDG (570W)](https://comparepv.com/panel/ulica-solar-tsm144-9-570-595bndg-570w) | 570 W | Cooler, heavier, +5 yr warranty | | [Ulica Solar TSM144-9-570-595BNDG (575W)](https://comparepv.com/panel/ulica-solar-tsm144-9-570-595bndg-575w) | 575 W | Cooler, +0.8 pp, +5 yr warranty | | [Ulica Solar UL-580M-144ADGN](https://comparepv.com/panel/ulica-solar-ul-580m-144adgn) | 580 W | Cooler, +1.0 pp, +5 yr warranty | | [Ulica Solar UL-585M-144ADGN](https://comparepv.com/panel/ulica-solar-ul-585m-144adgn) | 585 W | Cooler, +1.2 pp, +5 yr warranty | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +85 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/ulica-solar-ul-555m-144hv Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.