--- title: "Horay Solar HS520TC-MHG-D 520W Solar Panel - Specs & Review | ComparePV" description: "Horay Solar HS520TC-MHG-D 520W solar panel. Specs: 21.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/horay-solar-hs520tc-mhg-d" updated: 2026-09-11 --- # Horay Solar HS520TC-MHG-D Strong in heat, modest efficiency 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** Horay Solar - **Model:** HS520TC-MHG-D - **Series:** HS 210-100 TC-D Galaxy - **Rated power:** 520 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 500-550 W (432 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 520 W | 510 W | Typical | | | Module efficiency | 21.80% | 22.73% | Weak - bottom 11% | 7,022 | | Power density | 218.2 | 227.4 | Weak - bottom 11% | 6,970 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 10% | 1,309 | | 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 | 21.80% | 22.73% | Weak - bottom 11% | 7,022 | | Power density | 218.2 | 227.4 | Weak - bottom 11% | 6,970 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 10% | 1,309 | | Weight per kWp | 53.8 | 52.4 | Typical | 7,897 | | 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 1,309th in the whole database. ### Watch out for - **21.80% module efficiency** - Bottom 11% of the TOPCon 500-550 W segment, against a median of 22.73%. - **218.2 watts per square metre** - Bottom 11% of the TOPCon 500-550 W segment, against a median of 227.4. - **Best for:** Hot roofs and southern climates. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 520 W - **Efficiency:** 21.80 % - **Voltage at Pmax (Vmp):** 31.70 V - **Current at Pmax (Imp):** 16.40 A - **Open-circuit voltage (Voc):** 36.75 V - **Short-circuit current (Isc):** 17.72 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:** 100 - **Bifacial:** yes - **Bifacial gain:** 10.00 ### Physical - **Length:** 2174 mm - **Width:** 1096 mm - **Thickness:** 35 mm - **Weight:** 28.0 kg - **Area:** 2.38 m2 - **Power density:** 218.2 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 | 7022 of 14005 | | Power density | 6970 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 7897 of 14005 | | Warranty | 21 of 14005 | ## Pros - **BNEF Tier 1 status – confirmed Q1 2026** - Horay Solar has maintained BNEF Tier 1 bankable manufacturer status through Q1 2026, enabling project finance access and reducing counterparty warranty risk for institutional investors and utility-scale PV farms. - **N-type TOPCon: low temperature coefficient** - N-type TOPCon cells exhibit a temperature coefficient of approximately –0.28 %/°C compared to –0.34÷–0.37 %/°C typical for PERC. At summer module temperatures of +60 °C, this translates to several percentage points of additional energy yield versus legacy P-type technology, alongside reduced LID degradation. - **Bifacial + double glass: durability and yield** - Dual tempered glass eliminates PID micro-cracking and chemical corrosion, extending service life to 30+ years on industrial rooftops and ground-mount farms. Bifaciality adds 5–15% extra energy from reflected irradiance (albedo ≥ 0.2), directly lowering the system's LCOE. - **30-year linear power warranty** - The manufacturer guarantees performance retention for 30 years, exceeding the 25-year standard common in the segment (Trina Solar Vertex N, Jinko Tiger Neo), and directly reducing energy production risk under long-term PPA agreements. - **210 mm format – high power density** - M12 (210 mm) wafers deliver 510–530 Wp per module at ~2.56 m², reducing the total module count per MWp and cutting BoS costs (racking, DC cabling, labor) by an estimated 3–6% compared to 182 mm modules of similar technology. ## Cons - **Efficiency 1.7 pp below peer benchmarks** - The series tops out at 22.2% efficiency, while both key peer comparables in the dataset — Huasun Everest G12R and JA Solar JAT60S41 LR — achieve 23.9%. For the same roof area, this translates to roughly 7–8% less peak power output, a meaningful constraint for constrained industrial rooftops or area-limited installations. - **15-year product warranty vs. 25-year industry standard** - The 15-year product warranty (covering mechanical and electrical module integrity) is a decade shorter than the 25-year benchmark offered by JA Solar, Jinko Solar, and Trina Solar in the premium segment. This creates a service coverage gap in years 16–30 of a typical farm's operational life, shifting replacement risk to the investor. - **Double glass weight ~34–36 kg – rooftop constraint** - A 210 mm double glass module typically weighs approximately 34–36 kg versus 26–28 kg for single-glass alternatives in the same power class. On industrial rooftops with limited load capacity (e.g., older steel-framed buildings rated below 30 kg/m²), this may require a structural engineering assessment or roof reinforcement, increasing CAPEX. ## About this series The **Horay Solar HS 210-100 TC-D Galaxy** series redefines performance standards through the use of advanced N-type cells in TOPCon technology. These modules are based on large 210 mm silicon wafers, which, combined with a bifacial design, allow for maximizing energy yields even in challenging lighting conditions and at low solar incidence angles. The use of **TOPCon cell technology** significantly limits light-induced degradation and ensures a much lower temperature coefficient, resulting in stable and efficient operation of the installation on hot summer days. This solution is primarily dedicated to investors seeking the highest power density and extreme durability guaranteed by the **double glass structure**. Double tempered glass effectively protects the panel against micro-cracks and aggressive chemical environments, making it an ideal choice for large photovoltaic farms and industrial roofs with a very long life cycle. What sets them apart from the competition is the precise matching of electrical parameters, which effectively optimizes cabling and mounting structure costs. By choosing the Galaxy series, you gain **higher efficiency per square meter** and the certainty that the system will maintain high efficiency for decades, effectively minimizing the levelized cost of energy (LCOE) in demanding Polish climatic conditions. ## Notable figures - Efficiency of 21.8% is 0.9pp below the \*\*TOPCon 500-550W\*\* median (22.7%) - Power density of 218.2 W/m² is 9.2 W/m² below \*\*TOPCon 500-550W\*\* median (227.4 W/m²) - needs more roof space - Temperature coefficient of -0.28%/°C matches the \*\*TOPCon 500-550W\*\* median - At 28.0 kg, weight matches the \*\*TOPCon 500-550W\*\* median - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### Are Horay Solar HS 210-100 TC-D Galaxy panels suitable for utility-scale PV farms or industrial rooftops? Yes, the Galaxy series is designed primarily for large-scale applications — utility PV farms and industrial rooftops. The double glass construction with dual tempered glass provides exceptional resistance to microcracks and harsh environmental conditions. With up to 530 Wp per module and tightly matched electrical parameters, the series significantly reduces BoS costs (cabling and racking) in large systems, directly lowering the overall LCOE. ### What warranty does the Horay Solar HS 210-100 TC-D Galaxy series carry? The manufacturer provides a 15-year product warranty covering material and manufacturing defects, along with a 30-year linear power warranty. This guarantees that the module retains a specified minimum percentage of its rated output over 30 years. The extended power warranty is especially valuable for large-scale investments where return on investment is calculated over multi-decade horizons. ### How does the TOPCon cell technology in the Galaxy series compare to older PERC cells? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell featuring an additional passivation layer that reduces carrier recombination losses. Compared to P-type PERC cells, TOPCon delivers a lower temperature coefficient, higher efficiency, and significantly reduced light-induced degradation (LID). In practice, Galaxy series panels operate more efficiently on hot summer days and retain more of their rated power over years of operation. ### Do bifacial Horay Solar Galaxy panels actually generate more energy in real-world conditions? Yes, bifaciality delivers measurable energy gains, though the benefit depends on ground albedo and mounting height. On light-colored surfaces — concrete, gravel, or snow — the rear side can contribute an additional 5–15% of energy output. On utility farms with bright ground cover or elevated-rack installations, the bifacial gain of the Galaxy series is clearly quantifiable and shortens the investment payback period. ### Why does the Galaxy series use a double glass structure instead of a standard polymer backsheet? The double glass design eliminates backsheet cracking and moisture ingress — the leading causes of premature module aging. Dual tempered glass resists hail, UV radiation, and the aggressive cleaning chemicals used on industrial rooftops. This construction reliably extends service life beyond 30 years, which directly reduces the system's LCOE over its full operational lifetime. ### Is Horay Solar a reliable manufacturer — do they hold Tier 1 status? Horay Solar holds Tier 1 manufacturer status, meaning it meets the strict bankability criteria set by independent PV industry analysts. The company is headquartered in China, the global center of photovoltaic cell and module production. Tier 1 status ensures supply chain stability and warranty serviceability throughout the full operational lifetime of the installation. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/hs210-100tc-d-galaxy-530w-6724e18f7fb8.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | -25 W, lighter, +3.0 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +40 W, lighter, +3.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +2.9 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +35 W, lighter, +2.8 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | -30 W, lighter, +2.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +2.7 pp | | [Horay Solar HS510TC-MHG-D](https://comparepv.com/panel/horay-solar-hs510tc-mhg-d) | 510 W | -10 W, -0.4 pp | | [Horay Solar HS515TC-MHG-D](https://comparepv.com/panel/horay-solar-hs515tc-mhg-d) | 515 W | Very close match | | [Horay Solar HS525TC-MHG-D](https://comparepv.com/panel/horay-solar-hs525tc-mhg-d) | 525 W | Very close match | | [Horay Solar HS530TC-MHG-D](https://comparepv.com/panel/horay-solar-hs530tc-mhg-d) | 530 W | +10 W, +0.4 pp | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +70 W, hotter, +2.0 pp | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +65 W, hotter, +1.8 pp | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +60 W, lighter, +1.7 pp | | [Gamko New Energy GKA120N-PRO-580W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-580w) | 580 W | +60 W, hotter, +1.6 pp | --- Source: https://comparepv.com/panel/horay-solar-hs520tc-mhg-d Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.