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Huasun Brand review

RS420S8-108GANT

420 Wp TOPCon Bifacial
ComparePV verdict

Middle of its segment, heavy for its output

Rank 10,345 of 14,129
Compare panels Datasheet PDF
Power (Wp)
420
Weak · bottom 16%
Efficiency (%)
21.51
Weak · bottom 20%
Density (Wp/m²)
215.1
Weak · bottom 18%
Temp (%/°C)
-0.310
Weak · bottom 10%
Weight (kg)
24.5
Weak · 2.5 kg above median
Warranty (yrs)
30
Typical · median 30 yrs

The Huasun Aurora Pro RS420~445S8-108GANT series is designed for high energy production in locations where every square meter of installation space matters. The use of a dual-sided design allows for better utilization of reflected light from the ground, which translates directly into higher yields compared to standard single-sided modules. Another key advantage is the N-type cell technology, which reduces typical performance drops at startup and ensures more stable production over a longer period.

In practice, these modules address two common issues in Polish conditions: weaker generation in cloudy weather and power losses in hot weather. This is facilitated by excellent performance even in low-light conditions and favorable temperature characteristics. The dual-glass construction increases resistance to environmental conditions, while the refined manufacturing process supports high PID resistance.

This is an ideal choice for premium rooftop installations, PV farms, and C&I projects where durability, predictable yields, and a better energy balance throughout the year are priorities.

Ranking

1,220 panels in the segment TOPCon 400-450 W
Metric This panel Median Position in segment Overall rank
Module efficiency 21.51% 22.00% Weak · bottom 20% 7,958
Power density 215.1 220.2 Weak · bottom 18% 7,946
Temperature coefficient -0.310 -0.290 Weak · bottom 10% 8,069
Weight per kWp 58.3 51.5 Weak · bottom 8% 11,757
Performance warranty 30 yrs 30 yrs Typical 21
Colour key Strong - top 25% Typical - middle 50% Weak - bottom 25%

Signals from the data

4 positive · 6 caution
Best for

Residential, commercial and shaded-installations.

Not ideal for

Weight-limited structures, hot climates and roofs where every square metre has to count.

Watch-outs
58.3 kg per kWp

Bottom 8% of the TOPCon 400-450 W segment, against a median of 51.5. Ranked 11,757th in the whole database.

-0.310 %/°C temperature coefficient

Bottom 10% of the TOPCon 400-450 W segment, against a median of -0.290.

215.1 watts per square metre

Bottom 18% of the TOPCon 400-450 W segment, against a median of 220.2.

What owners get
Highest efficiency in peer group

Peak module efficiency of 22.79% outperforms Q-Cells Q.TRON BLACK (22.3%) by 0.49 pp and Solitek SOLRIF D Satin (22.06%) by 0.73 pp, placing the series at the top of all four peer comparables in the 108-cell TOPCon segment.

Bifacial N-type TOPCon cell technology

N-type TOPCon cells eliminate LID (Light Induced Degradation) present in PERC modules, reducing year-1 power loss. Bifacial design adds a typical 5-25% bifacial gain depending on ground albedo, which is especially valuable for ground-mount systems with bright gravel ballast or white roofing membranes.

30-year linear power warranty

The 30-year power warranty extends yield certainty 5 years beyond Q-Cells Q.TRON BLACK, which guarantees linear performance for 25 years (to 90.58% of nominal power at 0.33%/year degradation). The extended horizon has a direct positive impact on LCOE calculations for C&I and utility-scale projects.

BNEF Tier 1 - full bankability (Q1 2025)

Huasun confirmed BNEF Tier 1 manufacturer status for Q1 2025, enabling project finance for PV systems built with these modules and satisfying the approved manufacturer list (AML) requirements of infrastructure funds and senior lenders.

Trade-offs
Shorter product warranty than segment leader

The product warranty covers 15 years, while Q-Cells Q.TRON BLACK offers a 25-year product warranty - 10 years longer. For C&I and industrial installations, the reduced coverage against manufacturing defects and physical failures may be a disqualifying factor during supplier selection.

Short operating history vs. 30-year warranty obligation

Huasun was founded in 2020, giving the company approximately 5 years of track record, while the 30-year power warranty requires confidence in the manufacturer's financial viability through approximately 2053+. By comparison, Q-Cells (est. 1999) has over 25 years of operating history and Solitek (est. 2011) over 13 years.

TOPCon as a secondary line at an HJT-focused manufacturer

Huasun is the global HJT leader with 20 GW of production capacity and the flagship Himalaya HJT series achieving 24.75% module efficiency. Aurora Pro TOPCon is a complementary offering, which may imply lower dedicated R&D investment, slower product iteration, and reduced technical support resources compared to the primary HJT line.

Notes from the database
  • Efficiency of 21.5% matches the TOPCon 400-450W median
  • Power density of 215.1 W/m² is 5.1 W/m² below TOPCon 400-450W median (220.2 W/m²) - needs more roof space
  • At -0.31%/°C, loses 0.02pp more power per degree than TOPCon 400-450W median (-0.29%/°C)
  • At 24.5 kg, this panel is 2.5 kg heavier than the TOPCon 400-450W median (22.0 kg) - more demanding for installation crews
  • In the top 56% for efficiency among all TOPCon panels

Specifications

Open datasheet PDF
Nominal power (Pmax) 420 Wp Nameplate at 1000 W/m², 25 °C
Module efficiency 21.51 % Weak Segment median 22.00%
Vmpp · Impp 31.63 V · 13.28 A Operating point at max power
Voc · Isc 38.02 V · 14.05 A Sizes the string length
Max system voltage 1500 V Longer strings than 1000 V modules
Dimensions 1722×1134×35 mm · 1.95 m² of roof
Weight 24.5 kg Weak Weak · 2.5 kg above median
Cells 108 · TOPCon Monocrystalline
Coefficient Pmax -0.310 %/°C Weak bottom 10% of its segment
Coefficient Voc · Isc -0.260 · 0.046 %/°C
NOCT 42 °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 367 W guaranteed
Degradation 1.00 → 0.40 % First year, then annual

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
-

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

Heat losses
-0.310 %/°C against a segment median of -0.290
-

Alternatives

All Huasun panels
Filter these
Size
Panel Power Eff. Temp. Weight Difference
Huasun RS420S8-108GANT 420 W 21.51% -0.310 24.5 kg You are here
JST-EDMH-(445-465)W-TD (465W class) 465 W 23.81% -0.300 20.5 kg +45 W, lighter, +2.3 pp
LX-465M/182R-96+ GG 465 W 23.80% -0.260 23.5 kg +45 W, cooler, +2.3 pp
SPR-MAX7-470 470 W 23.70% -0.270 21.1 kg +50 W, +2.2 pp, +10 yr warranty
AIKO-A470-MAH54Mb 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.1 pp
AIKO-A460-MAH54Mb 460 W 23.60% -0.290 20.5 kg +40 W, lighter, +2.1 pp
HSM-BD54-LA470 470 W 23.60% -0.260 21.5 kg +50 W, cooler, +2.1 pp
RS425S8-108GANT 425 W 21.76% -0.310 24.5 kg +0.2 pp
RS430S8-108GANT 430 W 22.02% -0.310 24.5 kg +10 W, +0.5 pp
RS435S8-108GANT 435 W 22.28% -0.310 24.5 kg +15 W, +0.8 pp
RS440S8-108GANT 440 W 22.53% -0.310 24.5 kg +20 W, +1.0 pp
RS445S8-108GANT 445 W 22.79% -0.310 24.5 kg +25 W, +1.3 pp
LR7-54HJD-510M 510 W 25.00% -0.240 23.5 kg +90 W, cooler, +3.5 pp
AIKO-A495-MCE54Mw 495 W 24.80% -0.260 21.0 kg +75 W, cooler, +3.3 pp
LR7-54HJD-505M 505 W 24.70% -0.240 23.5 kg +85 W, cooler, +3.2 pp
WST-505BKX54-A2 505 W 24.70% -0.260 25.0 kg +85 W, cooler, +3.2 pp
AIKO-A490-MCE54Mw 490 W 24.50% -0.260 21.0 kg +70 W, cooler, +3.0 pp

Found 1797 panels of the same or similar size to this one, within ±10 mm. See them here Found 1928 panels of the same or similar size to this one, within ±25 mm. See them here Found 3413 panels of the same or similar size to this one, within ±50 mm. See them here Found 4007 panels of the same or similar size to this one, within ±100 mm. See them here

About the Aurora Pro RS420~445S8-108GANT series

6 answered

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

What warranty does Huasun offer on the Aurora Pro RS420~445S8-108GANT series?
Huasun provides a 15-year product warranty on the Aurora Pro RS420~445S8-108GANT modules, covering manufacturing defects and material failures. The linear power output warranty extends to 30 years, guaranteeing a gradual and predictable degradation curve. N-type TOPCon cells inherently exhibit lower degradation rates compared to PERC modules, so real-world energy yields remain higher throughout the system's lifetime.
What does TOPCon technology in the Aurora Pro RS420~445S8-108GANT mean, and how does it compare to PERC?
The N-type TOPCon cells used in the Aurora Pro RS420~445S8-108GANT deliver higher conversion efficiency and a better temperature coefficient than standard P-type PERC cells. This translates to lower power losses on hot days and eliminates the initial Light-Induced Degradation (LID) typical of PERC technology. In practice, TOPCon modules generate more kilowatt-hours per year at the same rated peak power.
Is the Aurora Pro RS420~445S8-108GANT a bifacial panel, and when does it actually pay off?
Yes, the Aurora Pro RS420~445S8-108GANT is a bifacial module. The rear side captures light reflected from the ground surface (albedo), potentially boosting annual energy yield by several percentage points. The gain is greatest over light-colored surfaces such as gravel, concrete, or snow. On a dark bituminous roof the bifacial gain is smaller but still measurable and contributes to a better overall LCOE.
Do the Huasun Aurora Pro RS420~445S8-108GANT panels perform well in overcast conditions and Central European climates?
Yes. N-type TOPCon cells demonstrate superior low-light performance compared to P-type technologies, which is particularly relevant in climates where a significant share of annual irradiation comes from diffuse light on cloudy days. The dual-glass construction also provides enhanced moisture resistance, making these modules well-suited for humid or variable weather conditions.
Are the Aurora Pro RS420~445S8-108GANT modules suitable for pitched roof installations, and what are the panel dimensions?
The Aurora Pro RS420~445S8-108GANT series is designed for both rooftop and ground-mounted installations. The 108 half-cut cell format fits into typical dimensions of approximately 1722 × 1134 mm, making transport and installation on pitched roofs straightforward. The glass-glass construction adds weight compared to glass-backsheet variants, so verifying roof load capacity with a structural engineer is recommended before installation.
Does the Huasun Aurora Pro RS420~445S8-108GANT actually reach 445 W under real-world conditions?
The 445 W peak power rating is measured under Standard Test Conditions (STC: 1000 W/m², 25°C). Field output depends on actual irradiance, ambient temperature, and angle of incidence. However, the favorable temperature coefficient of N-type TOPCon cells means power losses at elevated temperatures are lower than with PERC modules, keeping real-world production closer to nameplate ratings on warm, sunny days.
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