--- title: "Ulica Solar AU590-39V-MH 590W Solar Panel - Specs & Review | ComparePV" description: "Ulica Solar AU590-39V-MH 590W solar panel. Specs: 21.11% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/ulica-solar-au590-39v-mh" updated: 2026-09-11 --- # Ulica Solar AU590-39V-MH Middle of its segment, needs the roof space 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Ulica Solar - **Model:** AU590-39V-MH - **Series:** AU-156MH - **Rated power:** 590 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) | 590 W | 580 W | Strong - top 18% | | | Module efficiency | 21.11% | 22.44% | Weak - bottom 3% | 9,271 | | Power density | 211.1 | 224.4 | Weak - bottom 3% | 9,292 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight (kg) | 30.7 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 | 21.11% | 22.44% | Weak - bottom 3% | 9,271 | | Power density | 211.1 | 224.4 | Weak - bottom 3% | 9,292 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight per kWp | 52.0 | 53.8 | Typical | 5,478 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **211.1 watts per square metre** - Bottom 3% of the TOPCon 550-600 W segment, against a median of 224.4. Ranked 9,292nd in the whole database. - **21.11% module efficiency** - Bottom 3% of the TOPCon 550-600 W segment, against a median of 22.44%. Ranked 9,271st in the whole database. - **Best for:** Commercial, utility-scale, shaded-installations and hot-climate. - **Not ideal for:** Roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 590 W - **Efficiency:** 21.11 % - **Voltage at Pmax (Vmp):** 45.19 V - **Current at Pmax (Imp):** 13.06 A - **Open-circuit voltage (Voc):** 54.65 V - **Short-circuit current (Isc):** 13.82 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 156 ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 30.7 kg - **Area:** 2.80 m2 - **Power density:** 211.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **Output after 30 years:** 516 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9271 of 14005 | | Power density | 9292 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 5478 of 14005 | | Warranty | 21 of 14005 | ## About this series The AU-156MH series of photovoltaic panels are modules designed for high energy yields in installations where both power and stable performance in varying conditions are crucial. The use of **monocrystalline cells in a half-cut configuration** minimizes losses at connections and improves performance under partial shading - making the installation less sensitive to chimneys, skylights, or snow drifts. The module's design is suitable for **large roof and ground-mounted projects**, where repeatability of parameters and easy installation in standard mounting systems are important. In practice, the AU-156MH helps reduce energy costs by maintaining efficiency for longer and providing predictable performance in hot weather - which contributes to **favorable temperature characteristics**. An additional advantage is the **watertight connection box with a high level of protection**, which improves the safety of operation in harsh environments. This is a good choice for investors who want to maximize production without "over-sizing" the roof or land. ## Notable figures - Efficiency of 21.1% is 1.3pp below the \*\*TOPCon 550-600W\*\* median (22.4%) - 211.1 W/m² power density is 13.3 W/m² below \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - requires larger installation area - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 550-600W\*\* panels - Ranked #9271 out of 14005 panels for efficiency in the database ## Questions ### What cell technology does the Ulica Solar AU-156MH use, and how does it differ from PERC? The AU-156MH series uses monocrystalline TOPCon (Tunnel Oxide Passivated Contact) cells, which offer higher conversion efficiency and lower power loss at high temperatures compared to older PERC technology. This helps the module maintain more stable energy output on hot days, resulting in higher annual energy yield, particularly in installations operating in warmer climates. ### Does the half-cut cell design in the AU-156MH actually improve performance under partial shading? Yes. Splitting cells in half reduces resistive losses at interconnections and means that shading part of the panel, for example from a chimney or dormer, no longer disables the whole module but only the affected section. In practice this results in smaller output drops in installations with shading obstacles, which is important for complex roof layouts. ### Is the Ulica Solar AU-156MH bifacial, generating power from the rear side as well? No, the AU-156MH series consists of mono-facial modules - power is generated only from the front side of the panel. If additional yield from reflected light is important to you, consider a bifacial model from another Ulica Solar series instead. The AU-156MH is a solid choice for standard rooftop installations where double-sided generation isn't applicable. ### What warranty applies to the Ulica Solar AU-156MH solar panels? The manufacturer provides a 12-year product warranty covering material and workmanship defects, along with a 30-year linear power output warranty guaranteeing a minimum efficiency level throughout the panel's service life. This is comparable to offerings from many leading manufacturers, though it's worth comparing terms against Tier 1 brands. ### Is the AU-156MH suitable for large rooftop and ground-mount PV installations? Yes, the module was designed with commercial and industrial projects in mind - both large industrial rooftops and ground-mount installations. Consistent electrical parameters and standard dimensions make it easier to integrate with typical mounting systems, which lowers installation costs on larger-scale projects. ### Is the Ulica Solar AU-156MH series still available for purchase? No, production of the AU-156MH series has ended and the model has been discontinued from the manufacturer's current lineup. Availability is now limited to remaining distributor stock. Buyers looking for a replacement should check Ulica Solar's current TOPCon series with comparable power output, which have superseded this model in the product portfolio. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/img-id9qd12n4n-0cc0f569a128.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.7 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, cooler, +3.7 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.5 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +45 W, cooler, +3.5 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, cooler, +3.3 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | -40 W, lighter, +3.3 pp | | [Ulica Solar AU595-39V-MH](https://comparepv.com/panel/ulica-solar-au595-39v-mh) | 595 W | Very close match | | [Ulica Solar AU600-39V-MH](https://comparepv.com/panel/ulica-solar-au600-39v-mh) | 600 W | +10 W, +0.4 pp | | [Ulica Solar AU605-39V-MH](https://comparepv.com/panel/ulica-solar-au605-39v-mh) | 605 W | +15 W, +0.5 pp | | [Ulica Solar AU610-39V-MH](https://comparepv.com/panel/ulica-solar-au610-39v-mh) | 610 W | +20 W, +0.7 pp | | [Ulica Solar AU615-39V-MH](https://comparepv.com/panel/ulica-solar-au615-39v-mh) | 615 W | +25 W, +0.9 pp | | [Ulica Solar TSM156-9-620BNDG](https://comparepv.com/panel/ulica-solar-tsm156-9-620bndg) | 620 W | +30 W, heavier, +1.1 pp | | [Ulica Solar TSM156-9-625BNDG](https://comparepv.com/panel/ulica-solar-tsm156-9-625bndg) | 625 W | +35 W, heavier, +1.3 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +90 W, cooler, +4.1 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +85 W, cooler, +3.9 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +110 W, cooler, +3.9 pp | --- Source: https://comparepv.com/panel/ulica-solar-au590-39v-mh Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.