--- title: "Horay Solar HS520TC-MHB-D Solar Panel: Specs & Datasheet | ComparePV" description: "Horay Solar HS520TC-MHB-D solar panel. Specs: 23.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/horay-solar-hs520tc-mhb-d" image: "https://comparepv.com/og/panel/horay-solar-hs520tc-mhb-d.png" updated: 2026-09-11 --- # Horay Solar HS520TC-MHB-D Strong in heat, no clear weak spot 435 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** Horay Solar - **Model:** HS520TC-MHB-D - **Series:** HS 191R-120 TC-D Basin - **Rated power:** 520 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 500-550 W (435 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 520 W | 510 W | Typical | | | Module efficiency | 23.00% | 22.74% | Typical | 1,970 | | Power density | 230.0 | 227.4 | Typical | 2,187 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 10% | 1,347 | | Weight (kg) | 28.0 kg | 27.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.00% | 22.74% | Typical | 1,970 | | Power density | 230.0 | 227.4 | Typical | 2,187 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 10% | 1,347 | | Weight per kWp | 53.8 | 52.4 | Typical | 7,974 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 10% of the TOPCon 500-550 W segment, against a median of -0.290. Ranked 1,347th in the whole database. - **Best for:** Commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 520 W - **Efficiency:** 23.00 % - **Voltage at Pmax (Vmp):** 37.33 V - **Current at Pmax (Imp):** 13.93 A - **Open-circuit voltage (Voc):** 44.01 V - **Short-circuit current (Isc):** 14.83 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.280 %/degC - **Temperature coefficient of Voc:** -0.230 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 120 - **Bifacial:** yes - **Bifacial gain:** 10.00 ### Physical - **Length:** 1994 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 28.0 kg - **Area:** 2.26 m2 - **Power density:** 230.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 454 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1970 of 14129 | | Power density | 2187 of 14129 | | Temperature coefficient | 1347 of 14129 | | Weight | 7974 of 14129 | | Warranty | 21 of 14129 | ## Pros - **N-type TOPCon with R-cut 191mm cells** - N-type TOPCon cells deliver an annual degradation rate of ~0.40% (vs. ~0.50% for PERC) and effectively eliminate LID. The rectangular R-format 191mm cell boosts energy density beyond standard 182mm configurations, enabling a 500-520 Wp power range across only 120 half-cut cells. - **Bifacial double-glass construction** - The glass-glass build with an 80-85% bifaciality factor contributes 5-30% additional energy yield from the rear side depending on ground albedo. Eliminating the UV-susceptible backsheet directly supports a 30-year design life and reduces the long-term LCOE of the installation. - **30-year linear power warranty** - The manufacturer commits to a maximum annual degradation of 0.40%, guaranteeing ≥87.4% of nominal power after 30 years of operation. This is one of the longest performance warranty standards available for double-glass modules, surpassing the 25-year norm offered by many competitors. - **BNEF Tier-1 bankable status** - Horay Solar has been listed on the BloombergNEF Tier-1 solar module manufacturers list since Q1 2025 and retained the status in Q1 2026. This facilitates project financing and insurance for C&I and utility-scale deployments where manufacturer bankability is a lender requirement. - **22.1-23% efficiency in a compact layout** - The 22.1-23% efficiency range positions the Basin series among premium 120-cell modules; peer DAH Solar DHN-60R20/DG reaches the same 23% ceiling, confirming technical competitiveness within this product class. ## Cons - **Only 15-year product warranty** - Horay Solar provides a 15-year product (materials and workmanship) warranty, whereas direct competitor HT-SAAE (HT54-18X(N) series) offers 25 years as standard. This gap is material for TCO calculations in industrial installations and externally financed projects, where lenders often require a minimum 20-year product warranty. - **Efficiency below peer-group leaders** - The maximum module efficiency of 23.0% is 0.8 pp below HT-SAAE HT54-18X(N) (23.8%) and 0.5 pp below TCL Zhonghuan HSM-BD60-LA (23.5%). On space-constrained rooftops of, say, 50 m², this translates to measurably lower energy yield per square meter compared with the best alternatives in the same price segment. ## About this series The Horay Solar HS 191R-120 TC-D Basin series sets new standards in the high-efficiency module segment, focusing on advanced **N-type TOPCon** technology. Thanks to the use of rectangular R-type cells, these panels offer significantly higher energy density than traditional solutions, resulting in better utilization of the available roof or ground space. A key innovation is the **bifacial double glass** design, which allows for the generation of additional energy from both sides of the module, maximizing gains especially on bright surfaces. This solution effectively eliminates the problem of rapid light-induced degradation, guaranteeing stable operation for decades. Basin series panels are characterized by an **excellent temperature coefficient**, which makes them work efficiently even on hot days when standard cells lose power. This product is dedicated to investors seeking uncompromising durability and the highest yields per square meter of installation. A standout feature among the competition is the unique combination of aesthetics with **increased mechanical resistance** to extreme weather phenomena. By choosing this series, the user receives technology that realistically shortens the return on investment time thanks to higher efficiency in low-light conditions, such as dawn or dusk. ## Notable figures - Efficiency of 23.0% matches the \*\*TOPCon 500-550W\*\* median - Power density of 230.0 W/m² matches the \*\*TOPCon 500-550W\*\* median - Temperature coefficient of -0.28%/°C matches the \*\*TOPCon 500-550W\*\* median - At 28.0 kg, weight matches the \*\*TOPCon 500-550W\*\* median - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### What warranty does the Horay Solar HS 191R-120 TC-D Basin series come with? The Basin series includes a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty. After 30 years, the module should retain at least 87.4% of its rated power output. This is among the most generous degradation schedules in its class and directly shortens the investment payback period. Horay Solar holds Tier 1 status on the BloombergNEF list, confirming the company's long-term bankability. ### What is TOPCon technology and how does it differ from PERC in the Horay Solar HS 191R-120 TC-D Basin? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell architecture that achieves higher efficiency than standard PERC thanks to tunnel oxide passivation layers. In practice this means greater energy yield per square meter of roof, better low-light performance at dawn, dusk, and under overcast skies, and significantly lower LID and LeTID degradation in the first years of operation. A 520 Wp Basin module built on TOPCon will realistically generate more kWh annually than an equivalent PERC panel. ### Are the Horay Solar HS 191R-120 TC-D Basin panels bifacial, and does it matter on a typical rooftop? Yes, the Basin series features a bifacial double glass construction, meaning the rear side is protected by tempered glass instead of a backsheet. On a pitched roof with a light-colored membrane or bright substrate, rear-side gain typically adds 5-15% additional energy. The effect is greatest on ground-mounted systems above white gravel or snow. The glass-glass structure also increases mechanical strength and eliminates PID degradation, supporting a service life well beyond 30 years. ### What is the peak power of the Horay Solar HS 191R-120 TC-D Basin and how many panels are needed for a 10 kWp system? The flagship variant of the Basin series is rated at 520 Wp under STC conditions. A 10 kWp system requires only 20 modules, reducing the number of mounting points and shortening installation time. The rectangular R-type cells enable denser cell packing on the module surface, delivering noticeably higher module efficiency compared to standard square-cell panels of the same wattage class. ### Do the Horay Solar HS 191R-120 TC-D Basin panels perform well in summer when ambient temperatures exceed 40°C? Yes. The Basin series benefits from an excellent power temperature coefficient (Pmax) typical of N-type TOPCon cells, around -0.30%/°C, compared to -0.35%/°C or worse for PERC modules. At a cell temperature of 75°C (a typical hot midday scenario), the Basin panel loses roughly 15% of rated power, versus 17-18% for a comparable PERC. Over a full year this difference translates into measurably higher annual energy yield, especially during peak summer months. ### Is the Horay Solar HS 191R-120 TC-D Basin series still available for purchase? Yes, the Basin series is an active, continuously manufactured product line from Horay Solar. The company appears on the BloombergNEF Tier 1 list for Q1 2025, confirming ongoing production and parts availability. Modules are available through authorized distributors. Before placing an order, it is advisable to confirm current stock of the specific wattage variant directly with your local importer. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/HS191R-120TC-D-Basin-520W-a652caf0f922.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +2.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | -25 W, lighter, +1.8 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +40 W, lighter, +1.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +1.7 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | Cooler, lighter, +1.7 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +35 W, lighter, +1.6 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | -30 W, lighter, +1.5 pp | | [Horay Solar HS500TC-MHB](https://comparepv.com/panel/horay-solar-hs500tc-mhb) | 500 W | -20 W, lighter, -0.9 pp | | [Horay Solar HS505TC-MHB](https://comparepv.com/panel/horay-solar-hs505tc-mhb) | 505 W | -15 W, lighter, -0.7 pp | | [Horay Solar HS510TC-MHB](https://comparepv.com/panel/horay-solar-hs510tc-mhb) | 510 W | -10 W, lighter, -0.4 pp | | [Horay Solar HS515TC-MHB-D](https://comparepv.com/panel/horay-solar-hs515tc-mhb-d) | 515 W | Very close match | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +30 W, lighter, +1.4 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | Cooler, lighter, +1.4 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | Cooler, lighter, +1.4 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +25 W, cooler, +1.3 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +25 W, lighter, +1.2 pp | --- Source: https://comparepv.com/panel/horay-solar-hs520tc-mhb-d Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.