--- title: "Horay Solar HS555TC-MHG-D Solar Panel: Specs & Datasheet | ComparePV" description: "Horay Solar HS555TC-MHG-D solar panel. Specs: 21.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/horay-solar-hs555tc-mhg-d" image: "https://comparepv.com/og/panel/horay-solar-hs555tc-mhg-d.png" updated: 2026-09-11 --- # Horay Solar HS555TC-MHG-D Strong in heat, needs the roof space 1,022 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Horay Solar - **Model:** HS555TC-MHG-D - **Series:** HS 210-108 TC-D Galaxy - **Rated power:** 555 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 550-600 W (1022 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 555 W | 580 W | Weak - bottom 5% | | | Module efficiency | 21.70% | 22.44% | Weak - bottom 14% | 7,485 | | Power density | 216.8 | 224.4 | Weak - bottom 11% | 7,596 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 5% | 1,347 | | Weight (kg) | 31.5 kg | 31.2 kg | Weak - bottom 12% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.70% | 22.44% | Weak - bottom 14% | 7,485 | | Power density | 216.8 | 224.4 | Weak - bottom 11% | 7,596 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 5% | 1,347 | | Weight per kWp | 56.8 | 53.8 | Weak - bottom 12% | 10,924 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 5% of the TOPCon 550-600 W segment, against a median of -0.290. Ranked 1,347th in the whole database. ### Watch out for - **216.8 watts per square metre** - Bottom 11% of the TOPCon 550-600 W segment, against a median of 224.4. - **56.8 kg per kWp** - Bottom 12% of the TOPCon 550-600 W segment, against a median of 53.8. - **21.70% module efficiency** - Bottom 14% of the TOPCon 550-600 W segment, against a median of 22.44%. - **Best for:** Hot roofs and southern climates. - **Not ideal for:** Roofs where every square metre has to count, weight-limited structures and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 555 W - **Efficiency:** 21.70 % - **Voltage at Pmax (Vmp):** 34.13 V - **Current at Pmax (Imp):** 16.26 A - **Open-circuit voltage (Voc):** 39.58 V - **Short-circuit current (Isc):** 17.56 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:** 108 - **Bifacial:** yes - **Bifacial gain:** 10.00 ### Physical - **Length:** 1965 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 31.5 kg - **Area:** 2.56 m2 - **Power density:** 216.8 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:** 485 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7485 of 14129 | | Power density | 7596 of 14129 | | Temperature coefficient | 1347 of 14129 | | Weight | 10924 of 14129 | | Warranty | 21 of 14129 | ## Pros - **21.5-21.7% efficiency leads peer group** - The Galaxy series achieves 21.5-21.7% module efficiency, outperforming all three peer comparables: Boviet VEGA Series (21.3%), ET Solar Elite PLUS (21.4%), and matching JA Solar DEEP BLUE 3.0 (21.5%). Higher power density per m² is critical for residential rooftop installations with limited available area. - **N-type TOPCon: zero LID and superior Pmax/°C** - N-type TOPCon cells eliminate light-induced degradation (LID), a known weakness of P-type PERC. Typical TOPCon temperature coefficient of approx. -0.30%/°C vs. -0.35%/°C for PERC translates to roughly 1.75% higher output at 35°C above STC, a meaningful advantage during peak summer generation hours. - **Bifacial dual-glass: rear-side yield and durability** - The bifacial dual-glass architecture captures an additional 10-25% energy from ground albedo reflection depending on surface type. Dual-glass construction eliminates microcracks and substantially reduces moisture ingress and PID risk - both critical for meeting the 30-year performance horizon. - **30-year linear power warranty and BNEF Tier 1 status** - Horay Solar provides a 30-year linear power warranty, exceeding the 25-year standard offered by peer-comparable products (JA Solar DEEP BLUE 3.0, ET Solar Elite PLUS). The company has maintained BNEF Tier 1 bankable manufacturer status since Q1 2025, confirmed again in Q1 2026, satisfying lender and project finance requirements. ## Cons - **Product warranty limited to 15 years** - The equipment warranty covers only 15 years, compared to the 25-year product warranty offered as standard by JA Solar (DEEP BLUE 3.0) and Trina Solar in the premium segment. For commercial installations financed via lease or project loans, the shorter warranty period may restrict available financing instruments or require supplemental insurance coverage. - **Limited European service network** - With ~2.5 GW/year production capacity and a relatively short track record in European markets, Horay Solar's service infrastructure lags behind JA Solar (50+ GW, EU service offices) and Trina Solar. In markets like Poland, the availability of authorized service partners and response times for field replacements beyond year 10-15 carry measurable long-term O&M risk. ## About this series The Horay Solar HS 210-108 TC-D Galaxy panel series introduces a new level of quality thanks to the use of advanced **N-type TOPCon technology**, which effectively eliminates the problem of light-induced degradation and ensures higher efficiency in low light conditions. The use of large **210 mm cells** in a compact 108-cell format allows for powerful power output per square meter, making these modules an ideal choice for the roofs of single-family houses with limited space. The unique **bifacial design** combined with **double glass** architecture ensures that Galaxy panels not only generate energy from both sides but are also exceptionally resistant to micro-cracks and harsh weather conditions. This solves the problem of performance decline over time and gives investors the confidence of long-term, trouble-free operation. This product stands out from the competition with an excellent temperature coefficient, which translates into stable electricity production even on hot days. It is a solution dedicated to professional installations where maximizing return on investment and modern design are key. Thanks to its construction, this series provides the highest level of fire safety, which is crucial in both the residential and commercial sectors. ## Notable figures - At 21.7% efficiency, this panel is 0.7pp below the \*\*TOPCon 550-600W\*\* median of 22.4% - At 216.8 W/m², this panel generates 7.6 W/m² less 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 - #7485 for efficiency, #1347 for temperature performance out of 14129 panels ## Questions ### What warranties come with the Horay Solar HS 210-108 TC-D Galaxy panels? The Galaxy series includes a 15-year product warranty covering material and manufacturing defects, alongside a 30-year linear power warranty. After 30 years of operation the module should retain at least 87.4% of its rated output power. This is among the longest power warranties available in the residential PV segment and reflects the manufacturer's confidence in N-type TOPCon cell durability combined with the double glass construction. ### How does the HS 210-108 TC-D Galaxy perform on overcast days and during heat waves? The N-type TOPCon cells used in the Galaxy series feature a low temperature coefficient of approximately -0.30%/°C, meaning power loss on hot summer days is smaller than with conventional PERC modules. TOPCon also delivers superior low-light performance, so the panels generate electricity more efficiently under diffuse irradiance typical of Central European climates. Both factors contribute to a higher annual energy yield compared to entry-level alternatives. ### What does bifacial mean in the HS 210-108 TC-D Galaxy and how much extra energy does it produce? Bifacial means the module generates power from both the front and rear surfaces by capturing light reflected from the roof or ground. In the Galaxy series this is achieved through a double glass construction that replaces the standard backsheet. Depending on surface reflectivity, bifacial gain typically ranges from 5% to 15% compared to an equivalent monofacial module, with higher gains on light-colored or reflective mounting surfaces. ### Will a 555 Wp Galaxy panel with 210 mm cells fit on a standard residential rooftop? The HS 210-108 TC-D Galaxy combines large-format 210 mm cells in a compact 108-cell layout, achieving 555 Wp while keeping module dimensions manageable for typical pitched residential roofs. The double glass design does add some weight compared to standard framed modules, so it is advisable to have a qualified installer verify roof load capacity before purchase and to confirm compatibility with the planned racking system. ### Is Horay Solar a Tier 1 manufacturer and should I be concerned about warranty support? Horay Solar is recognized as a Tier 1 manufacturer by independent financial agencies, indicating financial stability and fully automated production lines. The Galaxy series carries IEC 61215 and IEC 61730 certifications required for grid-connected installations across the EU. Warranties are serviced through authorized regional distributors, so buyers should confirm that their supplier provides written warranty support in their country before completing the purchase. ### How do the Horay Solar HS 210-108 TC-D Galaxy panels compare to similarly priced PERC modules? The key difference is cell technology: the Galaxy uses N-type TOPCon cells rather than P-type PERC. TOPCon eliminates light-induced degradation (LID), offers higher module efficiency, and has a better temperature coefficient. The bifacial double glass construction further extends mechanical service life and adds rear-side energy yield. Comparably priced PERC modules typically do not offer a 30-year power warranty, bifacial capability, or a dual-glass laminate. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/HS210-108TC-D-Galaxy-570W-c1e56604591c.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | -45 W, lighter, +3.3 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.1 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -50 W, lighter, +3.0 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | -50 W, lighter, +3.0 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +2.9 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, 15 kg lighter, +2.7 pp | | [Horay Solar HS550TC-MHG-D](https://comparepv.com/panel/horay-solar-hs550tc-mhg-d) | 550 W | Very close match | | [Jetion JT590SJk(B)](https://comparepv.com/panel/jetion-jt590sjk-b) | 590 W | +35 W, cooler, +1.4 pp | | [Resun Solar RS9V-M-DG-590](https://comparepv.com/panel/resun-solar-rs9v-m-dg-590) | 590 W | +35 W, hotter, +1.4 pp | | [Jetion JT585SJk(B)](https://comparepv.com/panel/jetion-jt585sjk-b) | 585 W | +30 W, cooler, +1.2 pp | | [Resun Solar RS9V-M-DG-585](https://comparepv.com/panel/resun-solar-rs9v-m-dg-585) | 585 W | +30 W, hotter, +1.2 pp | | [Gamko New Energy GKA210N108-580W](https://comparepv.com/panel/gamko-new-energy-gka210n108-580w) | 580 W | Hotter, lighter, +1.0 pp | | [Jetion JT580SJk(B)](https://comparepv.com/panel/jetion-jt580sjk-b) | 580 W | +25 W, cooler, +1.0 pp | | [Resun Solar RS9V-M-DG-580](https://comparepv.com/panel/resun-solar-rs9v-m-dg-580) | 580 W | +25 W, hotter, +1.0 pp | | [Gamko New Energy GKA210N108-575W](https://comparepv.com/panel/gamko-new-energy-gka210n108-575w) | 575 W | Hotter, lighter, +0.8 pp | | [Jetion JT575SJk(B)](https://comparepv.com/panel/jetion-jt575sjk-b) | 575 W | +20 W, cooler, +0.8 pp | --- Source: https://comparepv.com/panel/horay-solar-hs555tc-mhg-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.