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LS Solar Brand review

STC 01

400 Wp Monocrystalline
ComparePV verdict

Middle of its segment, weak in heat

Rank 13,490 of 14,005
Compare panels Datasheet PDF
Power (Wp)
400
Weak · bottom 24%
Efficiency (%)
20.46
Typical · median 21.30%
Density (Wp/m²)
204.7
Typical · median 212.6
Temp (%/°C)
-0.370
Weak · bottom 6%
Weight (kg)
21.5
Typical · median 22.5 kg
Warranty (yrs)
-
Not published

The LS Solar STC solar panel series introduces a new quality to residential and commercial micro-installations, focusing on advanced shingled technology. This solution relies on dense cell arrangement, which eliminates traditional ribbon connections and significantly reduces the risk of hot spots and micro-cracks. As a result, users gain an installation with higher reliability and a longer lifespan, which directly translates into a stable return on investment. These modules are characterized by an exceptional Full Black aesthetic, making the panels an integral part of modern architecture without sacrificing technical parameters. The innovative design ensures better use of the module surface, allowing for the generation of more power per square meter compared to standard products available on the market. The LS Solar STC series solves the problem of limited roof space, offering maximum energy density while maintaining excellent efficiency even in low sunlight conditions. It is an ideal choice for investors looking for a compromise between attractive design and industrial durability. Importantly, these panels exhibit increased resistance to mechanical loads, which in the Polish climate is a key advantage that sets them apart from budget competition.

Ranking

6,519 panels in the 300-500 W band, all technologies
Metric This panel Median Position in segment Overall rank
Module efficiency 20.46% 21.30% Typical 11,540
Power density 204.7 212.6 Typical 11,514
Temperature coefficient -0.370 -0.300 Weak · bottom 6% 13,081
Weight per kWp 53.6 53.2 Typical 7,653
Performance warranty - 30 yrs Not published 13,880
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 3 caution
Not ideal for

Hot climates.

Watch-outs
-0.370 %/°C temperature coefficient

Bottom 6% of the 300-500 W band, against a median of -0.300. Ranked 13,081st in the whole database.

What owners get
Shingled cell technology

Densely packed cells without traditional busbar tab connections eliminate hot-spot risk at soldered joints and reduce susceptibility to microcracks, translating into lower field failure rates compared to conventional half-cut modules with tabbed busbars.

20.46% efficiency, top of segment

20.46% efficiency compares favorably against peer comparables of the same 400 Wp power class: it clearly outperforms MWG Mono (19.32%) and DMEGC GH400M10T-B48HST (15.48%), and sits nearly on par with Heliene 108HC M10 SL All Black (20.5%).

Full Black aesthetic without efficiency loss

The all-black design (cells, frame, backsheet) preserves architectural appeal for rooftop installations while maintaining 20.46% efficiency, unlike many budget Full Black panels that sacrifice several efficiency points for aesthetics.

Higher power density per square meter

The tight shingled cell layout minimizes dead space between cells, yielding more Wp per unit roof area than standard modules with conventional cell spacing and tab connections - valuable where residential roof space is limited.

Enhanced mechanical load resistance

The shingled construction distributes mechanical stress more evenly across the module surface, an advantage under the heavy snow and wind loads typical of the Polish climate compared to budget modules lacking reinforced laminate structures.

Trade-offs
Manufacturer not on Tier-1 BNEF list

LS Solar is not on BNEF's Tier-1 bankable manufacturer list, unlike some competitors in the 400 Wp segment. This can complicate bank financing for commercial projects and may lower installation resale value, even though it does not directly reflect module quality.

Limited market track record for the technology

Shingled technology has a shorter field history than conventional half-cut PERC/TOPCon modules, and the manufacturer is not yet widely established in the European market, meaning less independent long-term degradation data and less certainty around warranty service availability in Poland.

Notes from the database
  • Efficiency of 20.5% is 1.4pp below the database median (21.8%)
  • At 204.6 W/m², this panel generates 13.5 W/m² less per unit area than database median (218.1 W/m²)
  • -0.37%/°C temperature coefficient - 0.07pp worse than database median (-0.30%/°C), expect higher hot weather losses
  • At 21.5 kg, this panel is 5.0 kg lighter than database median (26.5 kg) - easier handling during installation
  • In the top 82% for efficiency among all N-type panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 400 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 20.46 % Typical Segment median 21.30%
Vmpp · Impp 31.05 V · 12.89 A Operating point at max power
Voc · Isc 37.00 V · 13.78 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1135×30 mm · 1.95 m² of roof
Weight 21.5 kg Typical Typical · median 22.5 kg
Coefficient Pmax -0.370 %/°C Weak bottom 6% of its segment
Coefficient Voc · Isc -0.280 · 0.048 %/°C

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
-0.370 %/°C against a segment median of -0.300
-

Alternatives

All LS Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
LS Solar STC 01 400 W 20.46% -0.370 21.5 kg You are here
LX-440M/182-108+GG 440 W 23.07% -0.240 23.6 kg +40 W, cooler, +2.6 pp
JST-EDMH-(445-465)W-TD (450W class) 450 W 23.05% -0.300 20.5 kg +50 W, cooler, +2.6 pp
QNN182-HG450-54 450 W 23.04% -0.290 24.0 kg +50 W, cooler, +2.6 pp
HY440-N108BDD 450 W 23.04% -0.300 23.5 kg +50 W, cooler, +2.6 pp
NLBK-27-450 450 W 23.04% -0.300 22.9 kg +50 W, cooler, +2.6 pp
RS41-450NBG-E3 450 W 23.04% -0.290 24.5 kg +50 W, cooler, +2.6 pp
400 W 400 W - -0.370 21.4 kg Very close match
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +110 W, cooler, +4.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +95 W, cooler, +4.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +105 W, cooler, +4.2 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +90 W, cooler, +4.0 pp
LR7-54HJD-500M 500 W 24.50% -0.240 23.5 kg +100 W, cooler, +4.0 pp
CIPRO-TN9C54M-500W 500 W 24.50% -0.260 21.4 kg +100 W, cooler, +4.0 pp

Found 1783 panels of the same or similar size to this one, within ±10 mm. See them here Found 1914 panels of the same or similar size to this one, within ±25 mm. See them here Found 3392 panels of the same or similar size to this one, within ±50 mm. See them here Found 3970 panels of the same or similar size to this one, within ±100 mm. See them here

Common questions

6 answered
How does shingled cell technology in the LS Solar STC series work, and why is it better than conventional tabbed cells?
In shingled technology, cells are sliced into narrow strips and overlapped like roof shingles, bonded with a conductive adhesive instead of soldered busbars. This eliminates the tab wires that are the primary cause of microcracks and hot spots. In the LS Solar STC modules, the result is higher surface utilization, a peak output up to 400 Wp, and a longer service life compared to standard PERC modules of a similar size.
Does the Full Black finish of the LS Solar STC panels reduce their power output?
Not in any meaningful way for end users. The all-black backsheet and frame give the modules a uniform appearance that integrates well with modern rooflines. Any marginal temperature increase typical of Full Black designs in direct sunlight is offset by the denser cell packing inherent to shingled technology, which itself delivers higher power density per square meter than conventional modules.
What warranty does the LS Solar STC series carry, and what should buyers watch for?
The manufacturer provides a standard product warranty and a linear power output warranty, consistent with this market segment. Since LS Solar is not classified as a Tier 1 manufacturer, it is important to confirm with the distributor who handles warranty claims locally and whether an insurance-backed warranty or reputable importer guarantee is included, as these factors directly affect long-term investment security.
Do the LS Solar STC 400 Wp panels perform well during Polish winters and overcast conditions?
Yes. Shingled technology offers better low-irradiance performance than conventional tabbed modules because eliminating tab resistance reduces losses when current is weak. In Poland's climate, with many diffuse-light days, this translates to a measurably higher real-world energy yield relative to the rated 400 Wp compared to budget PERC alternatives, making the series well-suited to Northern European conditions.
Is the LS Solar STC 400 Wp a good choice for a small roof where maximizing system power matters?
Yes, the STC series is particularly cost-effective when roof space is limited. The denser shingled cell packing delivers more watts per square meter than a conventional PERC module of the same footprint. On a roof accommodating 12 modules, the 20 Wp per-panel advantage over a 380 Wp alternative adds up to 240 Wp of extra system capacity with no additional mounting hardware required.
How do the LS Solar STC panels compare to bifacial modules, and when should I choose this model instead?
The LS Solar STC is a monofacial module, generating power only from the front surface. Bifacial modules additionally harvest albedo light reflected from the ground, offering a 5–20% gain, but only when mounted with sufficient ground clearance above a reflective surface. The STC is the better choice for a typical dark pitched roof, where bifacial gains are negligible, and the Full Black aesthetics combined with shingled technology are sufficient to achieve high efficiency.
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