Light for its output, no clear weak spot
The Horay Solar HS 191R-144 TC Basin panel series is an advanced solution based on N-type TOPCon cell technology, which redefines efficiency standards in demanding commercial installations. These panels effectively eliminate the problem of light-induced degradation, offering significantly better long-term power stability compared to older generation modules. Thanks to the use of a bifacial glass-glass construction, the Basin series exhibits extreme resistance to aggressive external factors such as ammonia or high humidity, making it an ideal choice for modern agriculture and photovoltaic farms. The use of high-density rectangular cells allows for maximizing yields from the available mounting surface, which directly translates to a lower LCOE and faster return on investment. What sets these modules apart from the competition is an excellent temperature coefficient, allowing for high efficiency even in extreme heat. By choosing this series, investors receive a product that combines innovation with exceptional mechanical durability, guaranteeing energy security for decades. This is equipment designed for professionals for whom reliability and maximizing energy production in all lighting conditions are key.
Ranking
Signals from the data
Utility-scale, commercial, agrivoltaic and hot-climate.
Top 8% of the N-type 600-650 W segment, against a median of 52.8. Ranked 911th in the whole database.
Top 15% of the N-type 600-650 W segment, against a median of -0.290.
N-type TOPCon cells eliminate light-induced degradation (LID) that typically affects PERC modules (~1-3% initial drop), resulting in a lower annual power degradation rate. The rectangular cell format (144 cells, 182 mm) maximizes packing density, delivering 600-620 Wp output within a smaller module footprint compared to older modules in this power class.
The peak efficiency of 23% for the 620 Wp variant matches best-in-class peer comparables - HT-SAAE HT66-18X(ND)-F (23%, 620 Wp) and Weran Solar LR7-72HTH (23%, 620 Wp) - confirming that the Basin series competes in the top decile of its efficiency segment rather than at or below market median.
Horay Solar guarantees at least 87.4% of nominal output after 30 years (linear degradation ~0.4%/year after year one). This is the current N-type TOPCon industry benchmark for 2025-2026 and is materially better than legacy 25-year PERC warranties that typically allowed a decline to 80-84.8% by year 25.
Horay Solar has been listed on the BloombergNEF Tier-1 PV Module Manufacturer list since Q1 2025, with continued inclusion confirmed in Q1 2026. Tier-1 status is a prerequisite for debt financing and manufacturer warranty insurance on commercial and utility-scale PV projects, making this series fully bankable for institutional investors.
The Basin series is monofacial (is_bifacial: false), while a direct peer - MY Solar G&A N-Type TOPCon Bifacial - offers the same 620 Wp peak power and near-identical efficiency (22.95%) in a bifacial configuration. With typical bifaciality factors of 0.65-0.80, bifacial modules generate 8-20% additional energy yield in ground-mount and agrivoltaic installations on reflective surfaces (sand, concrete, snow), directly lowering project LCOE. For utility-scale PV farms where bifacial gain is a standard design assumption, this is a notable competitive limitation.
- Efficiency of 22.6% matches the N-type 600-650W median
- Power density of 225.8 W/m² matches the N-type 600-650W median
- Temperature coefficient of -0.28%/°C matches the N-type 600-650W median
- 28.0 kg weight - 4.8 kg lighter than N-type 600-650W median (32.8 kg), reducing installation effort
- #3716 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 610 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-144 TC Basin series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.