Light for its output, no clear weak spot
Horay Solar HS 186R-108 TC Alpine is a series of modules utilizing advanced N-type TOPCon technology, which redefines efficiency standards in prosumer and commercial installations. Thanks to the use of innovative 186R rectangular cells, these panels offer significantly higher power density while maintaining compact dimensions, which directly translates into optimal utilization of the available roof surface. Exceptional resistance to light-induced degradation ensures that the system maintains its performance for decades, addressing the problem of premature component aging. High module efficiency exceeding standard market thresholds allows for generating more electricity from the same unit of area. The Alpine series is distinguished by a reinforced frame design, making it an ideal solution for regions with heavy snow loads, ensuring the safety and stability of the structure. The use of half-cut cell technology reduces losses resulting from partial shading, clearly setting this product apart from older competitor solutions. It is the optimal choice for investors who prioritize an excellent temperature coefficient and modern finishing aesthetics, guaranteeing a harmonious integration with the roof surface.
Ranking
Signals from the data
Weight-limited structures and hot roofs and southern climates.
Top 11% of the N-type 450-500 W segment, against a median of 49.5.
Top 21% of the N-type 450-500 W segment, against a median of -0.290.
N-type TOPCon cells using 186R rectangular wafers deliver module efficiency of 21.8–22.8%, matching top peer comparables (Sunlike Solar SKT420~455M10-108D6: 22.8%, IBC Solar LS-TA2: 22.8%) and outperforming Waaree ARKA by nearly 1.9 pp (20.93%). N-type architecture also eliminates LID (Light Induced Degradation) common in PERC cells.
The Alpine frame is engineered for elevated snow and wind loads, directly addressing Central European and Scandinavian installation conditions. For prosumer rooftop systems in Poland, where snow loads per EN 1991-1-3 reach 0.7–1.6 kN/m² across most zones, this is a critical structural advantage.
The manufacturer guarantees maximum annual degradation of ≤0.45% post year 1, implying >86.5% of nameplate power after 30 years. Standard Chinese Tier-1 warranties (LONGi, JA Solar) cover 25 years with degradation to 84.8%; the Alpine series extends linear protection by 5 additional years.
Horay Solar attained BNEF Tier-1 status in Q1 2025, confirming the bankability required by European project finance institutions. Annual nameplate capacity of 2.5 GW/year and a European after-sales service hub in Valencia reduce supply-chain and O&M risk for institutional investors and IPP developers.
The 108 half-cut cell configuration splits the module into two independently operating sub-circuits, reducing resistive losses and limiting partial-shading impact on the full string. In a typical rooftop installation with chimney or antenna shading, half-cut technology preserves up to 50% of the lower sub-circuit's output without degrading the upper one.
The HS 186R-108 TC Alpine series has no bifacial variant (is_bifacial: false), while the comparable 455 Wp segment increasingly offers bifacial modules with 5–15% rear-side gain depending on ground albedo. Horay provides bifacial only in the 144-cell format (Alpine TC-D series), ruling out this series for flat-roof white-membrane applications or ground-mount utility projects.
Horay Solar joined the BNEF Tier-1 list only in Q1 2025, while LONGi, JA Solar, and Jinko have held continuous Tier-1 status since 2013–2015. The shorter European deployment history may result in higher insurance premiums or more conservative product assessments by lenders financing projects above 1 MWp.
- Efficiency of 22.8% matches the N-type 450-500W median
- At 227.7 W/m² power density, roof space requirements are typical for N-type 450-500W panels
- Temperature coefficient of -0.28%/°C matches the N-type 450-500W median
- 20.5 kg weight - 3.2 kg lighter than N-type 450-500W median (23.7 kg), reducing installation effort
- Ranked #2714 out of 14005 panels for efficiency in the database
Specifications
Datasheet charts
Measured curves published by Horay Solar in this model's datasheet. A chart carrying a wattage was measured on that variant alone - only the ones that describe 455 Wp appear here. The rest cover the whole series.
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Alternatives
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