Strong in heat, no clear weak spot
The Horay Solar HS 199R-132 TC-D Delta photovoltaic module series represents a breakthrough in energy efficiency thanks to the use of N-Type TOPCon cells, which minimize energy losses and offer a significantly better temperature coefficient than standard solutions. What particularly sets this line apart is its bifacial technology with double glass, allowing for energy generation from reflected radiation as well, which clearly increases annual electricity production in Polish climatic conditions. The use of innovative R-type rectangular cells allows for better utilization of the module surface, effectively solving the problem of limited space on the roofs of single-family houses and commercial buildings. Unlike older generation products, the Delta series features minimal light-induced degradation, which provides investors with financial stability and predictability of yields for decades. Exceptional resistance to extreme mechanical loads and excellent structural tightness make these panels dedicated to the most demanding users who expect premium technology. Thanks to the combination of high bifaciality and modern silicon architecture, this series outperforms the competition in terms of yield per square meter, forming the foundation for modern and highly profitable photovoltaic systems.
Ranking
Signals from the data
Residential, commercial, utility-scale and hot-climate.
Top 9% of the N-type 550-600 W segment, against a median of -0.290. Ranked 1,347th in the whole database.
The top variant reaches 23.0% module efficiency, outperforming all peer comparables: Talesun TM7G72M (22.8%), AE Solar CMD-144BDS (22.86%), and SunEvo EVO 5N (22.83%). The 132-cell rectangular R-type cell layout (182 mm format) maximizes active area utilization, delivering up to 590 Wp in a standard-footprint frame.
N-type cells exhibit near-zero light-induced degradation (LID ≈ 0%) and a lower temperature coefficient than PERC (~-0.30%/°C vs ~-0.35%/°C for PERC), translating into a measurably higher annual energy yield - estimated 3-5% gain on hot summer days (NOCT >45°C).
A bifaciality factor typical of TOPCon (≥80%) enables additional rear-side generation from reflected irradiance - in Polish conditions (snow, light gravel, bright facades) this adds an estimated 5-15% annual energy bonus. Dual glass eliminates backsheet delamination risk and improves moisture resistance (PID, busbar corrosion).
Horay Solar has maintained BloombergNEF Tier 1 status from at least Q1 2025 through Q1 2026, confirming manufacturer bankability - a prerequisite for project financing, favorable insurance terms, and qualification in most commercial tender specifications.
The module carries a 30-year linear power warranty, consistent with the top-tier segment standard. This eliminates the 'cliff degradation' effect seen in older stepped warranties and simplifies LCOE calculations. For comparison, legacy PERC modules typically offered 25-year warranties.
The HS 199R-132 TC-D Delta series has discontinued status. This means no guaranteed supply continuity for replacement modules, increased risk of power mismatch in strings after partial damage, and potentially limited warranty support - manufacturers typically do not maintain spare inventory for discontinued product lines.
The product (workmanship) warranty is 15 years, whereas leading premium-segment manufacturers (JinkoSolar Tiger Neo, LONGi Hi-MO 6, Trina Vertex N) now offer 25 years as standard. For bank-financed commercial installations, a 15-year product warranty may require additional insurance coverage or could be a disqualifying factor in procurement tenders.
- Efficiency of 22.6% matches the N-type 550-600W median
- At 224.4 W/m² power density, roof space requirements are typical for N-type 550-600W panels
- Temperature coefficient of -0.28%/°C matches the N-type 550-600W median
- At 31.5 kg, this panel is 1.2 kg heavier than the N-type 550-600W median (30.3 kg) - more demanding for installation crews
- 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces
Specifications
Simulations
Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.
Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.
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About the HS 199R-132 TC-D Delta series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.