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Horay Solar Brand review

HS555TC-MHG-D

555 Wp TOPCon Bifacial 80%
ComparePV verdict

Strong in heat, needs the roof space

Rank 5,695 of 14,129
Compare panels Datasheet PDF
Power (Wp)
555
Weak · bottom 5%
Efficiency (%)
21.70
Weak · bottom 14%
Density (Wp/m²)
216.8
Weak · bottom 11%
Temp (%/°C)
-0.280
Strong · top 5%
Weight (kg)
31.5
Weak · bottom 12%
Warranty (yrs)
30
Typical · median 30 yrs

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.

Ranking

1,022 panels in the segment TOPCon 550-600 W
Metric This panel Median Position in segment Overall 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
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

5 positive · 5 caution
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.

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-outs
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%.

What owners get
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.

Trade-offs
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.

Notes from the database
  • 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

Specifications

Open datasheet PDF
Nominal power (Pmax) 555 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.70 % Weak Segment median 22.44%
Vmpp · Impp 34.13 V · 16.26 A Operating point at max power
Voc · Isc 39.58 V · 17.56 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1965×1303×35 mm · 2.56 m² of roof
Weight 31.5 kg Weak Weak · bottom 12%
Cells 108 · TOPCon Monocrystalline
Bifaciality 80 % Rear output as a share of front
Coefficient Pmax -0.280 %/°C Strong top 5% of its segment
Coefficient Voc · Isc -0.230 · 0.040 %/°C
NOCT 45 °C At 800 W/m², 20 °C ambient
Product warranty 15 years Hardware defects only
Performance warranty 30 years Typical median 30 yrs · median 30 yrs
End-of-warranty output 87.4 % Equals 485 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

Datasheet charts

Open datasheet PDF

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 555 Wp appear here. The rest cover the whole series.

HS570TC-MHG-D I-V Curves HS570TC-MHG-D I-V Curves Whole series HS570TC-MHG-D P-V Curves HS570TC-MHG-D P-V Curves Whole series

Simulations

Live - change any input
Lifetime output & value
30 years at 1200 kWh/kWp/year and €0.50 per kWh
Power in year 30
-
Lifetime energy
-
Energy value
-
With bifacial gain
-

Degradation from this panel's own datasheet figures. No inverter, soiling or shading losses.

Heat losses
-0.280 %/°C against a segment median of -0.290
-
Bifacial gain
Rear gain over light concrete: -
-

Model: bifaciality × albedo × 0.6 view factor. A first-order estimate, not a yield simulation.

Alternatives

All Horay Solar panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Horay Solar HS555TC-MHG-D 555 W 21.70% -0.280 31.5 kg You are here
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg -45 W, lighter, +3.3 pp
LR7-60HVH-560M 560 W 24.80% -0.260 25.0 kg Cooler, lighter, +3.1 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg -50 W, lighter, +3.0 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg -50 W, lighter, +3.0 pp
LR7-60HVH-555M 555 W 24.60% -0.260 25.0 kg Cooler, lighter, +2.9 pp
LR7-60HVHL-550M 550 W 24.40% -0.260 16.3 kg Cooler, 15 kg lighter, +2.7 pp
HS550TC-MHG-D 550 W 21.50% -0.280 31.5 kg Very close match
JT590SJk(B) 590 W 23.10% -0.240 30.7 kg +35 W, cooler, +1.4 pp
RS9V-M-DG-590 590 W 23.08% -0.300 31.2 kg +35 W, hotter, +1.4 pp
JT585SJk(B) 585 W 22.90% -0.240 30.7 kg +30 W, cooler, +1.2 pp
RS9V-M-DG-585 585 W 22.88% -0.300 31.2 kg +30 W, hotter, +1.2 pp
GKA210N108-580W 580 W 22.71% -0.340 25.5 kg Hotter, lighter, +1.0 pp
JT580SJk(B) 580 W 22.70% -0.240 30.7 kg +25 W, cooler, +1.0 pp
RS9V-M-DG-580 580 W 22.69% -0.300 31.2 kg +25 W, hotter, +1.0 pp
GKA210N108-575W 575 W 22.51% -0.340 25.5 kg Hotter, lighter, +0.8 pp
JT575SJk(B) 575 W 22.50% -0.240 30.7 kg +20 W, cooler, +0.8 pp

Found 31 panels of the same or similar size to this one, within ±10 mm. See them here Found 41 panels of the same or similar size to this one, within ±25 mm. See them here Found 41 panels of the same or similar size to this one, within ±50 mm. See them here Found 85 panels of the same or similar size to this one, within ±100 mm. See them here

About the HS 210-108 TC-D Galaxy series

6 answered

These answers cover the whole series. Where a figure differs, the specification above is this module's own.

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.
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