--- title: "Resun Solar RS8K-M-475W 475W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS8K-M-475W 475W solar panel. Specs: 22.01% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs8k-m-475w" updated: 2026-09-11 --- # Resun Solar RS8K-M-475W Middle of its segment, needs the roof space 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Resun Solar - **Model:** RS8K-M-475W - **Series:** RS8K-M (N-type TOPCon) HALF-CELL - **Rated power:** 475 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 475 W | 465 W | Typical | | | Module efficiency | 22.01% | 22.52% | Weak - bottom 19% | 6,491 | | Power density | 220.1 | 225.2 | Weak - bottom 18% | 6,632 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight (kg) | 23.6 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 | 22.01% | 22.52% | Weak - bottom 19% | 6,491 | | Power density | 220.1 | 225.2 | Weak - bottom 18% | 6,632 | | Temperature coefficient | -0.300 | -0.290 | Weak - bottom 20% | 6,093 | | Weight per kWp | 49.7 | 52.2 | Typical | 3,195 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **220.1 watts per square metre** - Bottom 18% of the TOPCon 450-500 W segment, against a median of 225.2. - **22.01% module efficiency** - Bottom 19% of the TOPCon 450-500 W segment, against a median of 22.52%. - **-0.300 %/°C temperature coefficient** - Bottom 20% of the TOPCon 450-500 W segment, against a median of -0.290. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Roofs where every square metre has to count, tight roof space and hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 475 W - **Efficiency:** 22.01 % - **Voltage at Pmax (Vmp):** 34.63 V - **Current at Pmax (Imp):** 13.72 A - **Open-circuit voltage (Voc):** 41.93 V - **Short-circuit current (Isc):** 14.25 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:** 132 ### Physical - **Length:** 1903 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.6 kg - **Area:** 2.16 m2 - **Power density:** 220.1 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 401 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6491 of 14005 | | Power density | 6632 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 3195 of 14005 | | Warranty | 21 of 14005 | ## About this series The Resun Solar RS8K-M (N-type TOPCon) HALF-CELL series is designed for maximum energy yield in environments where stability under any conditions is paramount. The use of **N-type TOPCon** cells helps to minimize losses and maintain high efficiency even at elevated temperatures and in less ideal sunlight conditions. The **half-cell** design also enhances resistance to microcracks and reduces the risk of performance degradation over time, which is crucial for installations designed for long-term operation. The **multi-busbar** technology also deserves attention, as it improves current collection and reduces internal losses within the module, leading to more predictable annual energy production. The RS8K-M also features **high resistance to hot-spot effects under partial shading**, which is particularly beneficial in locations with chimneys, skylights, or trees nearby. This is a good choice for modern residential and commercial installations, where reliability, better performance in low light, and overall system cost-effectiveness are desired. ## Notable figures - At 22.0% efficiency, this panel is 0.5pp below the \*\*TOPCon 450-500W\*\* median of 22.5% - 220.1 W/m² power density is 5.1 W/m² below \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - requires larger installation area - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 450-500W\*\* panels - Ranked #6491 out of 14005 panels for efficiency in the database ## Questions ### What is the warranty on Resun Solar RS8K-M TOPCon panels? The RS8K-M series comes with a 15-year product warranty covering manufacturing defects and a 30-year linear power output warranty. The power warranty guarantees that modules will maintain a specified performance level for three decades. Resun Solar panels are additionally insured by the CHUBB Insurance Group, providing an extra layer of financial protection for both installers and end customers. ### How do the N-type TOPCon cells in the RS8K-M differ from standard PERC cells? The N-type TOPCon cells used in the RS8K-M feature higher silicon purity and a thin tunnel oxide passivation layer, which significantly reduces light-induced degradation (LID) compared to P-type PERC cells. This means slower power loss over the panel's lifetime — hence the 30-year power warranty. TOPCon is widely considered the high-efficiency successor to PERC technology in the premium module segment. ### Are the RS8K-M panels a good fit for a roof with partial shading from a chimney or trees? Yes. The half-cut cell design splits each cell into two independent electrical sections, substantially reducing power losses under partial shading. The high resistance to the hot-spot effect protects modules from overheating and damage when shadows fall unevenly across the array. The RS8K-M is a solid choice for rooftops with chimneys, dormers, or nearby vegetation where ideal solar exposure is difficult to achieve. ### What is the maximum power output of the Resun RS8K-M and how many panels do I need for a home system? The RS8K-M has a maximum power rating of 495 Wp (STC). For a typical 10 kWp residential installation, approximately 21 modules are required. Thanks to the high power density enabled by half-cut cell and multi-busbar technology, you can build a more powerful system within the same roof area compared to older, lower-wattage modules. ### Does the Resun RS8K-M TOPCon perform well in overcast conditions and low irradiance? Yes. N-type TOPCon cells demonstrate higher efficiency under diffuse and low-light conditions than older PERC technology. Combined with multi-busbar design — which shortens current paths and reduces internal resistive losses — this translates into better energy yield during early mornings, late afternoons, and cloudy days, which is a meaningful advantage in climates with frequent overcast weather. ### Is the Resun Solar RS8K-M a bifacial panel? No, the RS8K-M is a monofacial module — it collects energy from the front surface only. It does not require a high-albedo ground surface (light-colored gravel, reflective membrane) that bifacial installations depend on to generate additional rear-side yield. This makes it a straightforward, practical choice for standard pitched or flat roofs where bifacial technology would offer no meaningful energy gain. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/rs8k-m470-495w-topcon-1-compressed-901ff7a6b674.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +35 W, cooler, +3.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +30 W, cooler, +2.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +25 W, cooler, +2.5 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +25 W, cooler, +2.5 pp | | [Resun Solar RS8K-M-470W](https://comparepv.com/panel/resun-solar-rs8k-m-470w) | 470 W | -0.2 pp | | [Resun Solar RS8K-M-480W](https://comparepv.com/panel/resun-solar-rs8k-m-480w) | 480 W | +0.2 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +85 W, cooler, +2.8 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +80 W, cooler, +2.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +75 W, lighter, +2.4 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +65 W, cooler, +2.4 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +65 W, cooler, +2.4 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +70 W, cooler, +2.3 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +70 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/resun-solar-rs8k-m-475w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.