--- title: "Resun Solar RS8K-M-DG 485W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS8K-M-DG 485W solar panel. Specs: 22.47% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs8k-m-dg" updated: 2026-09-11 --- # Resun Solar RS8K-M-DG Middle of its segment, weak in heat 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Resun Solar - **Model:** RS8K-M-DG - **Series:** RS8K-M-DG - **Rated power:** 485 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 485 W | 465 W | Strong - top 20% | | | Module efficiency | 22.47% | 22.52% | Typical | 4,576 | | Power density | 224.7 | 225.2 | Typical | 4,501 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight (kg) | 26.3 kg | 24.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.47% | 22.52% | Typical | 4,576 | | Power density | 224.7 | 225.2 | Typical | 4,501 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight per kWp | 54.2 | 52.2 | Typical | 8,473 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.300 %/°C temperature coefficient** - Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290. - **Best for:** Residential and commercial. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 485 W - **Efficiency:** 22.47 % - **Voltage at Pmax (Vmp):** 35.90 V - **Current at Pmax (Imp):** 13.51 A - **Open-circuit voltage (Voc):** 43.05 V - **Short-circuit current (Isc):** 14.31 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.300 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 120 - **Bifacial:** yes - **Bifacial gain:** 10.00 ### Physical - **Length:** 1903 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 26.3 kg - **Area:** 2.16 m2 - **Power density:** 224.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 410 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4576 of 14005 | | Power density | 4501 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 8473 of 14005 | | Warranty | 21 of 14005 | ## About this series The RS8K-M-DG series is a **bifacial double-glass module** engineered for investors who expect maximum durability and predictable energy yield over decades of operation. The panel uses **N-type TOPCon monocrystalline half-cut cells with multi-busbar (MBB) technology**, which reduces internal power losses and increases resistance to microcracks and interrupted current paths - a common failure point in cheaper modules. The dual tempered glass with high transmittance and anti-reflective coating improves performance in low-light conditions, such as early morning or overcast days, when competing designs lose efficiency. Thanks to its **anti-PID resistance**, power degradation stays minimal, translating into a lower LCOE and a genuinely higher return on investment over the module's lifetime. The construction has passed tests for high wind loads, snow loads, and resistance to salt mist and ammonia exposure, making it suitable for rooftop installations, ground-mount farms, and agricultural sites alike. The manufacturer backs the module with a **30-year linear power warranty**, making RS8K-M-DG a solution for those who value investment security, low maintenance costs, and stable energy production in demanding climates. ## Notable figures - At 22.5% efficiency, this panel is on par with typical \*\*TOPCon 450-500W\*\* modules - Power density of 224.7 W/m² matches the \*\*TOPCon 450-500W\*\* median - Temperature coefficient of -0.30%/°C matches the \*\*TOPCon 450-500W\*\* median - Weight of 26.3 kg is 2.3 kg above \*\*TOPCon 450-500W\*\* median (24.0 kg) - verify structural support - #4576 for efficiency, #6093 for temperature performance out of 14005 panels ## Questions ### How does the RS8K-M-DG module differ from standard monofacial panels? The RS8K-M-DG is a bifacial module, meaning it generates power from both the front and rear sides, capturing light reflected off the ground or roof surface. With proper installation, such as on a light-colored roof or ground-mount structure, this can boost energy yield beyond what a monofacial panel of the same 485 Wp nominal power would produce, without increasing installed area. ### What is TOPCon technology and why was it used in the RS8K-M-DG? TOPCon (Tunnel Oxide Passivated Contact) is an N-type monocrystalline cell technology that reduces electron recombination and boosts efficiency compared to older PERC cells. In the RS8K-M-DG it is combined with half-cell and multi-busbar (MBB) design, further cutting current losses and improving resistance to microcracks, resulting in more stable performance over the module's lifetime. ### What warranty comes with the RS8K-M-DG panels? Resun Solar provides a 15-year product warranty and a 30-year linear power output warranty. This means the module retains a guaranteed, gradually declining power level over three decades, one of the longer terms available on the market, supporting predictable long-term return on investment. ### Are RS8K-M-DG panels suitable for solar farms and harsh climate conditions? Yes, the RS8K-M-DG design has passed tests for high wind loads, snow loads, and resistance to salt mist and ammonia exposure. It performs well on rooftops as well as in large ground-mount installations and agricultural sites, where panels face atmospheric contaminants and variable weather conditions. ### What is PID resistance and why does it matter for the RS8K-M-DG? PID (Potential Induced Degradation) is power loss caused by voltage differences between cells and the frame or ground, common in large systems with high string voltages. PID resistance in the RS8K-M-DG minimizes this effect, keeping energy output stable and lowering LCOE over the module's service life. ### How does the dual-glass construction of the RS8K-M-DG improve its durability? Dual tempered glass replaces the rear polymer backsheet used in conventional modules, increasing mechanical durability and protecting cells from moisture and corrosion. High-transmittance, anti-reflective glass also improves performance in low-irradiance conditions, such as mornings or overcast days, when monofacial panels lose efficiency. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS8K-M-DG-460-485W-RETIE-version-747f57b6d312.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +2.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +2.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +2.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +2.0 pp | | [Resun Solar RS8K-M-470W](https://comparepv.com/panel/resun-solar-rs8k-m-470w) | 470 W | -15 W, lighter, -0.7 pp | | [Resun Solar RS8K-M-475W](https://comparepv.com/panel/resun-solar-rs8k-m-475w) | 475 W | -10 W, lighter, -0.5 pp | | [Resun Solar RS8K-M-480W](https://comparepv.com/panel/resun-solar-rs8k-m-480w) | 480 W | Lighter, -0.2 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +75 W, cooler, +2.3 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +70 W, cooler, +2.1 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +65 W, lighter, +1.9 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +55 W, cooler, +1.9 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +55 W, cooler, +1.9 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +60 W, cooler, +1.8 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +60 W, cooler, +1.7 pp | --- Source: https://comparepv.com/panel/resun-solar-rs8k-m-dg 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.