Strong in heat, no clear weak spot
The Horay Solar HS 191R-132 TC Basin panel series is an advanced solution based on N-type TOPCon cell technology, which guarantees significantly higher efficiency compared to standard P-type modules. The use of innovative, rectangular silicon cells allows for maximum power density per unit area, effectively solving the problem of limited installation space on commercial roofs. A key differentiator of this series is its high resistance to LID and LeTID degradation, which translates into stable energy production over decades and a significantly faster return on investment. Thanks to high bifacial efficiency, Basin series panels effectively utilize light reflected from the ground, making them an ideal choice for professional ground-mounted installations and large-scale solar farms. This product stands out from the competition with an exceptionally low temperature coefficient, ensuring optimal performance and minimal power drops even on hot days. By choosing these modules, investors gain the certainty of lower transmission losses and better compatibility with modern inverters. It is a proposal for demanding designers looking for a balance between the latest technology and above-average mechanical durability in difficult weather conditions.
Ranking
Signals from the data
Hot roofs and southern climates and weight-limited structures.
Top 5% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 1,347th in the whole database.
Top 11% of the TOPCon 550-600 W segment, against a median of 53.8.
The top-power variant (570 Wp) reaches 23.0% module efficiency, while direct peer comparables - KDM Kingdom Solar MONO-FACIAL (22.07%), Silfab Commercial NTC (22.1%), and Suntech Ultra V (22.1%) - trail by 0.9 to nearly 1.0 percentage point. This translates to approximately 4% higher energy yield per unit of roof or ground area.
N-type TOPCon cells deliver annual degradation below 0.40%/year with near-zero LID/LeTID susceptibility, compared to P-type PERC modules where first-year LID can reach 1-2% and annual degradation averages 0.50-0.55%. Over a 30-year horizon, that difference compounds to several additional MWh per kWp of installed capacity.
Horay Solar has maintained BloombergNEF Tier 1 Module Manufacturer status since Q1 2025. Tier 1 bankability is a prerequisite for project debt financing and insurance underwriting, reducing project risk premiums and contributing to lower LCOE on commercial and utility-scale installations.
The manufacturer provides a 30-year linear power output warranty - at the top end of the market for the TOPCon premium segment. This puts the Basin series on par with peer Tier 1 offerings (Silfab Commercial NTC, Suntech Ultra V), not behind them, making it a non-compromise choice for long-term asset financing.
The 132-cell M10 half-cut configuration achieves high power density per m² while reducing resistive losses and improving partial-shading tolerance. At 550-570 Wp per module, the format minimizes panel count, racking components, and cabling runs versus older wafer formats, directly reducing BoS costs per installed kWp.
The standard product workmanship warranty is 12 years, whereas leading TOPCon Tier 1 suppliers - LONGi (Hi-MO X6), JA Solar (DeepBlue 4.0), and Jinko Solar (Tiger Neo) - offer 15-year product warranties. The 3-year shortfall is material in institutional procurement and O&M service agreements, and may be a differentiating factor in competitive tenders.
Horay Solar's annual manufacturing capacity is approximately 2.5 GW, far below Tier 1 market leaders (LONGi ~70 GW, JA Solar and Jinko Solar ~50 GW each). Lower scale implies reduced global supply-chain depth, potentially longer lead times, and lower brand recognition - factors that can affect long-term asset residual value and availability of technical support beyond 2035.
- Efficiency of 22.2% matches the TOPCon 550-600W median
- At 221.7 W/m² power density, roof space requirements are typical for TOPCon 550-600W panels
- At -0.28%/°C, hot weather performance is typical for TOPCon 550-600W panels
- At 25.5 kg, this panel is 5.7 kg lighter than TOPCon 550-600W median (31.2 kg) - easier handling during installation
- #5881 for efficiency, #1347 for temperature performance out of 14129 panels
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 550 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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About the HS 191R-132 TC Basin series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.