Skip to main content
Ulica Solar Brand review

UL-555M-144HV

555 Wp TOPCon
ComparePV verdict

Light for its output, weak in heat

Rank 7,598 of 14,005
Compare panels Datasheet PDF
Power (Wp)
555
Weak · bottom 5%
Efficiency (%)
21.48
Weak · bottom 6%
Density (Wp/m²)
214.8
Weak · bottom 6%
Temp (%/°C)
-0.340
Weak · bottom 5%
Weight (kg)
27.5
Strong · 3.7 kg below median
Warranty (yrs)
25
Weak · bottom 5%

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.

Ranking

1,018 panels in the segment TOPCon 550-600 W
Metric This panel Median Position in segment Overall 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
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

1 positive · 3 caution
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.

Strengths
49.5 kg per kWp

Top 25% of the TOPCon 550-600 W segment, against a median of 53.8.

Watch-outs
-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.

Notes from the database
  • 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

Specifications

Open datasheet PDF
Nominal power (Pmax) 555 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.48 % Weak Segment median 22.44%
Vmpp · Impp 42.00 V · 13.21 A Operating point at max power
Voc · Isc 50.10 V · 13.83 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 2279×1134×35 mm · 2.58 m² of roof
Weight 27.5 kg Strong Strong · 3.7 kg below median
Cells 144 · TOPCon Monocrystalline
Coefficient Pmax -0.340 %/°C Weak bottom 5% of its segment
Coefficient Voc · Isc -0.265 · 0.049 %/°C
NOCT 43 °C At 800 W/m², 20 °C ambient
Product warranty 12 years Hardware defects only
Performance warranty 25 years Weak bottom 5% · median 30 yrs
End-of-warranty output 84.8 % Equals 455 W guaranteed
Degradation 2.00 → 0.55 % First year, then annual

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
-0.340 %/°C against a segment median of -0.290
-
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Ulica Solar UL-555M-144HV 555 W 21.48% -0.340 27.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg Cooler, +3.5 pp, +5 yr warranty
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, +3.3 pp, +5 yr warranty
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg -50 W, cooler, +3.2 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, +3.1 pp, +5 yr warranty
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, lighter, +2.9 pp
JAT60S40-540/LR 540 W 24.40% -0.260 23.5 kg Cooler, +2.9 pp, +5 yr warranty
UL-540M-144HV 540 W 20.84% -0.360 28.3 kg -15 W, hotter, -0.6 pp
UL-545M-144HV 545 W 21.09% -0.360 28.3 kg -10 W, hotter, -0.4 pp
UL-550M-144HV 550 W 21.28% -0.360 28.3 kg Hotter
TSM144-9-570-595BNDG (570W) 570 W 22.10% -0.290 31.0 kg Cooler, heavier, +5 yr warranty
TSM144-9-570-595BNDG (575W) 575 W 22.30% -0.290 31.0 kg Cooler, +0.8 pp, +5 yr warranty
UL-580M-144ADGN 580 W 22.45% -0.290 30.6 kg Cooler, +1.0 pp, +5 yr warranty
UL-585M-144ADGN 585 W 22.65% -0.290 30.6 kg Cooler, +1.2 pp, +5 yr warranty
AIKO-A650-MAE72Mw 650 W 25.20% -0.260 27.0 kg +95 W, cooler, +3.7 pp
AIKO-A645-MAE72Mw 645 W 25.00% -0.260 27.0 kg +90 W, cooler, +3.5 pp
AIKO-A640-MAE72Mw 640 W 24.80% -0.260 27.0 kg +85 W, cooler, +3.3 pp

Found 2326 panels of the same or similar size to this one, within ±10 mm. See them here Found 2368 panels of the same or similar size to this one, within ±25 mm. See them here Found 2382 panels of the same or similar size to this one, within ±50 mm. See them here Found 2542 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 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.
Add to compare