Efficiency leader, no clear weak spot
The Horay Solar HS 210R-120 TC-D Cosmos series is a range of bifacial N-type modules designed to maximize energy yield not only from the front, but also from reflected light off the ground. Thanks to its glass-glass construction and anti-reflective coating, it operates more stably in demanding conditions and better utilizes diffuse light, resulting in more predictable energy production in the Polish climate. The use of SMBB half-cell improves current collection in the cells and reduces thermal losses, supporting higher operating efficiency in installations exposed to heat. Another advantage is N-type with very low LID degradation, meaning a smaller power drop over time and more reliable investment returns. The series also boasts high resistance to harsh environments - tests with solar fog and ammonia make it suitable for industrial applications, on farms, in warehouses, and in agricultural facilities. This is the choice for investors who want long-term linear warranty and a module that performs reliably in real-world conditions, rather than just in tables.
Ranking
Signals from the data
Commercial, utility-scale, shaded-installations and hot-climate.
Top 2% of the TOPCon 550-600 W segment, against a median of 22.44%. Ranked 1,617th in the whole database.
Top 3% of the TOPCon 550-600 W segment, against a median of 224.4. Ranked 1,701st in the whole database.
Top 5% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 1,347th in the whole database.
The Cosmos series reaches up to 23.1% module efficiency, clearly outperforming direct peers - KDM Kingdom Solar Mono-Facial Black (22.07%), Silfab Commercial NTC (22.1%), and Suntech Ultra V (22.1%). The ~1 pp advantage translates to tangible savings in roof or field area for the same installed capacity.
All three peer-comparable products (KDM, Silfab NTC, Suntech Ultra V) are monofacial modules. The Cosmos glass-glass bifacial construction enables additional rear-side energy yield from albedo reflections of 5-25% (typically 10-15% in ground-mount systems with light-colored ground), with a meaningful contribution during snow-covered periods of approximately 3-4 months per year in Polish climate conditions.
The manufacturer guarantees ≥87.4% of nominal power output after 30 years of operation (degradation ≤0.4%/year after year one), exceeding the market-standard 25-year linear warranty offered by many leading Tier-1 manufacturers. The extended warranty horizon reduces project bankability risk and improves LCOE calculations.
N-type TOPCon cells exhibit light-induced degradation (LID) of <1%, compared to 1.5-2% for PERC technology. The Pmax temperature coefficient for Cosmos 210R series modules is typically -0.30%/°C, delivering approximately 2-3% higher yield at typical summer operating temperatures (65-70°C module temp) versus PERC modules at -0.35%/°C.
Horay Solar has been listed on the BloombergNEF Tier 1 PV Module Manufacturer list since Q1 2025 (reconfirmed Q1 2026), meeting the bankability requirement for most utility-scale and commercial PV project financing. The Cosmos series has passed salt mist (IEC 61701) and ammonia (IEC 62716) resistance testing, qualifying installations at agricultural facilities, industrial sites, and coastal locations.
The product warranty covers 15 years, while leading Tier-1 manufacturers in the same commercial power class (Jinko Solar, LONGi, Canadian Solar) standardly offer 25-year product warranties. For projects with bank financing or insurance requirements extending beyond 15 years, this may require additional arrangements with the insurer or O&M provider.
- At 23.1% efficiency, this panel is 0.7pp above typical TOPCon 550-600W modules (median: 22.4%)
- At 230.8 W/m² power density, this panel generates 6.4 W/m² more per unit area than TOPCon 550-600W median (224.4 W/m²)
- At -0.28%/°C, hot weather performance is typical for TOPCon 550-600W panels
- Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface
- #1617 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 570 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.
Alternatives
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About the HS 210R-120 TC-D Cosmos N-type Bifacial Modules series
These answers cover the whole series. Where a figure differs, the specification above is this module's own.