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Ulica Solar Brand review

AU620-39V-MH

620 Wp TOPCon
ComparePV verdict

Light for its output, needs the roof space

Rank 3,399 of 14,005
Compare panels Datasheet PDF
Power (Wp)
620
Typical for its class
Efficiency (%)
22.18
Weak · bottom 9%
Density (Wp/m²)
221.8
Weak · bottom 9%
Temp (%/°C)
-0.300
Weak · bottom 19%
Weight (kg)
30.7
Strong · 2.0 kg below median
Warranty (yrs)
30
Typical · median 30 yrs

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.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.18% 22.80% Weak · bottom 9% 5,930
Power density 221.8 227.7 Weak · bottom 9% 5,869
Temperature coefficient -0.300 -0.290 Weak · bottom 19% 6,093
Weight per kWp 49.5 53.1 Strong · top 19% 3,052
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 3 caution
Best for

Commercial, utility-scale, shaded-installations and hot-climate.

Not ideal for

Roofs where every square metre has to count, tight roof space and hot climates.

Strengths
49.5 kg per kWp

Top 19% of the TOPCon 600-650 W segment, against a median of 53.1.

Watch-outs
221.8 watts per square metre

Bottom 9% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 5,869th in the whole database.

22.18% module efficiency

Bottom 9% of the TOPCon 600-650 W segment, against a median of 22.80%. Ranked 5,930th in the whole database.

-0.300 %/°C temperature coefficient

Bottom 19% of the TOPCon 600-650 W segment, against a median of -0.290.

Notes from the database
  • Efficiency of 22.2% is 0.6pp below the TOPCon 600-650W median (22.8%)
  • 221.8 W/m² power density is 5.9 W/m² below TOPCon 600-650W median (227.7 W/m²) - requires larger installation area
  • At -0.30%/°C, hot weather performance is typical for TOPCon 600-650W panels
  • Weight of 30.7 kg (2.0 kg below TOPCon 600-650W median of 32.7 kg) allows easier transport and roof mounting
  • Ranked #5930 out of 14005 panels for efficiency in the database

Specifications

Open datasheet PDF
Nominal power (Pmax) 620 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.18 % Weak Segment median 22.80%
Vmpp · Impp 45.79 V · 13.54 A Operating point at max power
Voc · Isc 55.55 V · 14.25 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2465×1134×30 mm · 2.80 m² of roof
Weight 30.7 kg Strong Strong · 2.0 kg below median
Cells 156 · TOPCon Monocrystalline
Coefficient Pmax -0.300 %/°C Weak bottom 19% of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 542 W guaranteed

Datasheet charts

Open datasheet PDF

Measured curves published by Ulica Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 620 Wp appear here. The rest cover the whole series.

Linear Power Output Warranty (Years 0–30, 100%→87.4%) Linear Power Output Warranty (Years 0–30, 100%→87.4%) Whole series IV Curve – Current vs Voltage at Varying Irradiance (Cells temp. = 25°C) IV Curve – Current vs Voltage at Varying Irradiance (Cells temp. = 25°C) Whole series IV Curve – Current vs Voltage at Varying Cell Temperature (1000 W/m² Irradiance) IV Curve – Current vs Voltage at Varying Cell Temperature (1000 W/m² Irradiance) Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.300 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Ulica Solar AU620-39V-MH 620 W 22.18% -0.300 30.7 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg Cooler, lighter, +3.0 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg Cooler, lighter, +2.8 pp
AIKO-G670-MCH72Mw 670 W 24.80% -0.260 28.2 kg +50 W, cooler, +2.6 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +50 W, cooler, +2.6 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg Cooler, lighter, +2.6 pp
JKM650-670N-66QL6-BDV (670W class) 670 W 24.80% -0.260 32.5 kg +50 W, cooler, +2.6 pp
AU590-39V-MH 590 W 21.11% -0.300 30.7 kg -30 W, -1.1 pp
AU595-39V-MH 595 W 21.29% -0.300 30.7 kg -25 W, -0.9 pp
AU600-39V-MH 600 W 21.46% -0.300 30.7 kg -20 W, -0.7 pp
AU605-39V-MH 605 W 21.64% -0.300 30.7 kg -15 W, -0.5 pp
AU610-39V-MH 610 W 21.82% -0.300 30.7 kg -10 W, -0.4 pp
AU615-39V-MH 615 W 22.00% -0.300 30.7 kg Very close match
TSM156-9-625BNDG 625 W 22.40% -0.290 33.5 kg Cooler, heavier, +0.2 pp
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +60 W, cooler, +3.0 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +55 W, cooler, +2.8 pp
AIKO-A700-MAE78Dw 700 W 25.00% -0.260 34.5 kg +80 W, cooler, +2.8 pp

Found 616 panels of the same or similar size to this one, within ±10 mm. See them here Found 616 panels of the same or similar size to this one, within ±25 mm. See them here Found 616 panels of the same or similar size to this one, within ±50 mm. See them here Found 1813 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
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.
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