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Ulica Solar Brand review

TSM156-9-620BNDG

620 Wp TOPCon Bifacial 80%
ComparePV verdict

Middle of its segment, needs the roof space

Rank 4,849 of 14,005
Compare panels Datasheet PDF
Power (Wp)
620
Typical for its class
Efficiency (%)
22.20
Weak · bottom 12%
Density (Wp/m²)
221.8
Weak · bottom 9%
Temp (%/°C)
-0.290
Typical · median -0.290
Weight (kg)
33.5
Typical · median 32.7 kg
Warranty (yrs)
30
Typical · median 30 yrs

The Ulica Solar TSM156-9-620-645BNDG series is designed for installations where maximizing energy yield per square meter and stable performance in challenging conditions are paramount. These are bifacial modules that can actively utilize reflected light from the ground, allowing for increased energy production without expanding the structure. The use of N-type silicon cells with TOPCon technology results in lower losses over time and better performance at high temperatures, which is particularly beneficial on roofs and solar farms during the summer months.

The double glass variant enhances resistance to moisture, microcracks, and accelerated aging, making the series suitable for long-term projects and areas with strong winds and heavy snow loads. An additional advantage is the long, multi-year power warranty, which is important for the bankability of the investment.

This is a sensible choice for PV farms, warehouses, and industrial buildings, as well as for installations on roofs with good sunlight or reflective surfaces, where single-sided modules may not provide the desired energy yield.

Ranking

1,086 panels in the segment TOPCon 600-650 W
Metric This panel Median Position in segment Overall rank
Module efficiency 22.20% 22.80% Weak · bottom 12% 5,817
Power density 221.8 227.7 Weak · bottom 9% 5,869
Temperature coefficient -0.290 -0.290 Typical 2,165
Weight per kWp 54.0 53.1 Typical 8,248
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

0 positive · 2 caution
Best for

Commercial, utility-scale, hot-climate and cold-climate.

Not ideal for

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

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.

22.20% module efficiency

Bottom 12% of the TOPCon 600-650 W segment, against a median of 22.80%.

Notes from the database
  • At 22.2% efficiency, this panel is 0.6pp below the TOPCon 600-650W median of 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 -0.29%/°C, hot weather performance is typical for TOPCon 600-650W panels
  • Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
  • #5817 for efficiency, #2165 for temperature performance out of 14005 panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 620 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 22.20 % Weak Segment median 22.80%
Vmpp · Impp 46.67 V · 13.30 A Operating point at max power
Voc · Isc 55.82 V · 14.16 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 33.5 kg Typical Typical · median 32.7 kg
Cells 156 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.290 %/°C Typical median -0.290 of its segment
Coefficient Voc · Isc -0.250 · 0.046 %/°C
NOCT 44 °C At 800 W/m², 20 °C ambient
Product warranty 5 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
Degradation 1.00 → 0.40 % First year, then annual

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 Performance Warranty Linear Performance Warranty Whole series I-V characteristics at different temperatures I-V characteristics at different temperatures 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
-
With bifacial gain
-

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

Heat losses
-0.290 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Filter these
Size
Panel Power Eff. Temp. Weight Difference
Ulica Solar TSM156-9-620BNDG 620 W 22.20% -0.290 33.5 kg You are here
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +30 W, 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, lighter, +2.6 pp
LR7-72HVHF-670M 670 W 24.80% -0.260 28.5 kg +50 W, lighter, +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, lighter, -1.1 pp
AU595-39V-MH 595 W 21.29% -0.300 30.7 kg -25 W, lighter, -0.9 pp
AU600-39V-MH 600 W 21.46% -0.300 30.7 kg -20 W, lighter, -0.7 pp
AU605-39V-MH 605 W 21.64% -0.300 30.7 kg -15 W, lighter, -0.6 pp
AU610-39V-MH 610 W 21.82% -0.300 30.7 kg Hotter, lighter, -0.4 pp
AU615-39V-MH 615 W 22.00% -0.300 30.7 kg Hotter, lighter
TSM156-9-625BNDG 625 W 22.40% -0.290 33.5 kg Very close match
AIKO-A680-MDE72Mw 680 W 25.20% -0.260 29.0 kg +60 W, lighter, +3.0 pp
AIKO-A675-MDE72Mw 675 W 25.00% -0.260 29.0 kg +55 W, lighter, +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 is the maximum power output of the Ulica Solar TSM156-9-620-645BNDG series?
The series ranges from 620 to 645 Wp, depending on the binning class of the N-type TOPCon cells used in a given unit. This high per-module power output means fewer panels are needed to reach a target system size, reducing costs for mounting structures, cabling, and installation labor, especially in large-scale farm and industrial projects.
What is N-type TOPCon technology and why is it used in this series?
TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that reduces recombination losses, giving the module lower first-year and long-term degradation compared to conventional P-type PERC cells. N-type cells also perform better at high temperatures, which translates into real energy gains during summer on rooftops and PV farms exposed to intense sunlight.
How do the bifacial TSM156-9-620-645BNDG panels differ from standard one-sided modules?
Bifacial modules have active cells on both sides and can generate additional energy from diffuse and reflected light reaching the rear side of the panel. In practice, this means higher energy yield without enlarging the array footprint, especially on light-colored roofs, gravel, concrete, or snow. The double glass construction also protects the rear side from moisture and mechanical damage.
What warranty applies to the Ulica Solar TSM156-9-620-645BNDG panels?
The manufacturer provides a 5-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty. This power warranty period is now standard for N-type TOPCon modules and matters when assessing project bankability, since it allows long-term revenue from the installation to be forecast with confidence.
Are the TSM156-9-620-645BNDG panels suitable for large warehouse roofs and PV farms?
Yes, that is one of the main use cases for this series. The high per-module power output of up to 645 Wp, a double glass build resistant to snow and wind loads, and bifacial technology make it well suited for large warehouse and industrial roofs as well as ground-mount PV farms, where maximizing energy yield per square meter is a priority.
Is Ulica Solar a Tier 1 manufacturer, and does that matter when choosing panels?
Ulica Solar, based in China, is not currently on the Bloomberg NEF Tier 1 list, which does not necessarily equate to lower product quality. The Tier classification mainly reflects the scale of bank financing available to a manufacturer, not technical module performance. When choosing panels, it's better to focus on actual specifications, such as cell technology and warranty length, rather than the Tier category alone.
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