--- title: "Huasun RS425S8-108GANT Solar Panel: Specs & Datasheet | ComparePV" description: "Huasun RS425S8-108GANT solar panel. Specs: 21.76% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/huasun-rs425s8-108gant" image: "https://comparepv.com/og/panel/huasun-rs425s8-108gant.png" updated: 2026-09-11 --- # Huasun RS425S8-108GANT Middle of its segment, heavy for its output 1,220 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Huasun - **Model:** RS425S8-108GANT - **Series:** Aurora Pro RS420~445S8-108GANT - **Rated power:** 425 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1220 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 425 W | 435 W | Typical | | | Module efficiency | 21.76% | 22.00% | Typical | 7,349 | | Power density | 217.6 | 220.2 | Typical | 7,235 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,069 | | Weight (kg) | 24.5 kg | 22.0 kg | Weak - bottom 10% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.76% | 22.00% | Typical | 7,349 | | Power density | 217.6 | 220.2 | Typical | 7,235 | | Temperature coefficient | -0.310 | -0.290 | Weak - bottom 10% | 8,069 | | Weight per kWp | 57.6 | 51.5 | Weak - bottom 10% | 11,411 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **57.6 kg per kWp** - Bottom 10% of the TOPCon 400-450 W segment, against a median of 51.5. Ranked 11,411th in the whole database. - **-0.310 %/°C temperature coefficient** - Bottom 10% of the TOPCon 400-450 W segment, against a median of -0.290. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Weight-limited structures and hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.76 % - **Voltage at Pmax (Vmp):** 31.82 V - **Current at Pmax (Imp):** 13.36 A - **Open-circuit voltage (Voc):** 38.21 V - **Short-circuit current (Isc):** 14.13 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.310 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 - **Bifacial:** yes ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 24.5 kg - **Area:** 1.95 m2 - **Power density:** 217.6 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:** 371 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7349 of 14129 | | Power density | 7235 of 14129 | | Temperature coefficient | 8069 of 14129 | | Weight | 11411 of 14129 | | Warranty | 21 of 14129 | ## Pros - **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. ## Cons - **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. ## About this series 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. ## Notable figures - At 21.8% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - At 217.6 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - -0.31%/°C temperature coefficient - 0.02pp worse than \*\*TOPCon 400-450W\*\* median (-0.29%/°C), expect higher hot weather losses - Weight of 24.5 kg is 2.5 kg above \*\*TOPCon 400-450W\*\* median (22.0 kg) - verify structural support - In the top 52% for efficiency among all TOPCon panels ## Questions ### 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. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/s8-108gant-420-445w-1722x1134x35-38bab565ad57.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +50 W, +2.2 pp, +10 yr warranty | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +40 W, lighter, +2.0 pp | | [JA Solar JAT54S40-475/LR](https://comparepv.com/panel/ja-solar-jat54s40-475-lr) | 475 W | +50 W, lighter, +2.0 pp | | [Tongwei TWMNH-48HW475](https://comparepv.com/panel/tongwei-solar-twmnh-48hw475) | 475 W | +50 W, cooler, +2.0 pp | | [Astronergy CHSM48RN(DG)/F-BH-475](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm48rn-dg-f-bh-475) | 475 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A475-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a475-mce54mw) | 475 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A475-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a475-mah54mw) | 475 W | +50 W, cooler, +2.0 pp | | [Huasun RS420S8-108GANT](https://comparepv.com/panel/huasun-rs420s8-108gant) | 420 W | -0.2 pp | | [Huasun RS430S8-108GANT](https://comparepv.com/panel/huasun-rs430s8-108gant) | 430 W | +0.3 pp | | [Huasun RS435S8-108GANT](https://comparepv.com/panel/huasun-rs435s8-108gant) | 435 W | +10 W, +0.5 pp | | [Huasun RS440S8-108GANT](https://comparepv.com/panel/huasun-rs440s8-108gant) | 440 W | +15 W, +0.8 pp | | [Huasun RS445S8-108GANT](https://comparepv.com/panel/huasun-rs445s8-108gant) | 445 W | +20 W, +1.0 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +85 W, cooler, +3.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +70 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +80 W, cooler, +2.9 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +80 W, cooler, +2.9 pp | --- Source: https://comparepv.com/panel/huasun-rs425s8-108gant Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.