Strong in heat, no clear weak spot
The Horay Solar HS 199R-144 TC-D Delta series redefines performance standards through the use of advanced N-type TOPCon cell technology. Utilizing this innovation allows for significantly higher efficiency compared to traditional P-type modules, especially in low sunlight conditions. The bifacial glass-glass construction makes the panels not only extremely durable and resistant to micro-cracks, but also capable of generating additional energy from radiation reflected from the ground. This is a key advantage in commercial installations and photovoltaic farms, where every watt per square meter counts. Investors will appreciate the minimal annual degradation, which guarantees stable yields for decades, eliminating the problem of rapid installation power loss. These modules solve the problem of system overheating in full sun thanks to a low temperature coefficient, which translates into real financial gains during summer production peaks. This product is dedicated to demanding users looking for a balance between modern aesthetics and maximum mechanical lifespan. Thanks to resistance to the PID effect and the influence of ammonia and salt mist, the Delta series performs perfectly even in harsh environmental conditions, setting itself apart from the competition with exceptional long-term operational stability.
Ranking
Signals from the data
Commercial, utility-scale, hot-climate and shaded-installations.
Top 14% of the N-type 600-650 W segment, against a median of -0.290.
N-type TOPCon cells degrade at ~0.40–0.45%/year versus 0.6–0.8%/year for P-type PERC, while being fully immune to LID and LeTID. This translates into meaningfully higher energy yields in years 20–30 of system life at the same nominal nameplate power.
A bifaciality factor above 80% enables 5–15% additional rear-side energy gain from ground albedo in utility-scale and light-rooftop installations. The dual-glass bill eliminates the backsheet, improving moisture resistance and reducing micro-crack propagation risk — critical for 30-year project lifetimes.
Horay Solar backs the Delta series with a 30-year linear power warranty — matching industry leaders such as Jinko Tiger Neo and Astronergy ASTRO N5. The guaranteed annual degradation cap of ≤0.55%/year meets premium N-type TOPCon standards and supports bankability for project finance.
Horay Solar has been listed on the BloombergNEF Tier-1 PV Module Manufacturer ranking since Q1 2025, reconfirmed for Q1 2026. Tier-1 status means modules qualify for bank and fund financing without additional credit insurance — a prerequisite for commercial and utility-scale CAPEX structures.
The 630–650 Wp power range at 22.5–23.3% efficiency reduces module count per MW of installed capacity. Fewer modules mean less racking, fewer MC4 connectors, and shorter string runs, generating measurable BoS savings of 2–4% of total CAPEX on large commercial or ground-mount projects.
The Delta series carries a 15-year product warranty (materials and workmanship), while direct comparable Astronergy ASTRO N5 offers 30 years and Jinko Solar Tiger Neo 66HL4M-BDX offers 25 years. The gap is material for EPC contracts with long O&M schedules or insurer warranty requirements.
Maximum module efficiency is 23.3%, versus 24.06% for the Jinko Solar Tiger Neo 66HL4M-BDX in the same power class (up to 650 Wp) — a delta of 0.76 percentage points. On a 1 MWp rooftop with fixed area, this translates to roughly 3.3% less annual energy output compared to the segment leader, which can be decisive where roof space is constrained.
- Efficiency of 22.9% matches the N-type 600-650W median
- Power density of 228.9 W/m² matches the N-type 600-650W median
- Temperature coefficient of -0.28%/°C matches the N-type 600-650W median
- At 34.5 kg (2.0 kg above N-type 600-650W median of 32.5 kg), requires checking roof load capacity
- Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof
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 640 Wp appear here. The rest cover the whole series.
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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