--- title: "Resun Solar RS8K-M-475 475W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS8K-M-475 475W solar panel. Specs: 22.01% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs8k-m-475" updated: 2026-09-11 --- # Resun Solar RS8K-M-475 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-475 - **Series:** RS8K-M - **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) | 23.9 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 | 50.3 | 52.2 | Typical | 3,714 | | 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:** Commercial, shaded-installations and hot-climate. - **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:** 35 mm - **Weight:** 23.9 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 | 3714 of 14005 | | Warranty | 21 of 14005 | ## About this series The Resun Solar RS8K-M series are advanced photovoltaic modules that redefine performance standards through the use of **large-format 210 mm silicon cells**. The use of **Half-cut and Multi-busbar (MBB)** technology allows for a significant reduction in resistive losses, which directly translates into higher energy production even in conditions of low sunlight or partial shading. These panels effectively solve the problem of limited installation space by offering above-average power density, making them an excellent choice for **utility-scale solar farms and large industrial facilities**. What sets the RS8K-M series apart from the competition is its exceptionally low temperature coefficient and minimized light-induced degradation effect, ensuring yield stability for decades. Investors choosing this solution can count on a **significantly reduced Levelized Cost of Energy (LCOE)** and a faster return on investment. The robust frame construction and the use of high-transmission tempered glass ensure full safety and resistance to extreme weather conditions, such as strong winds or heavy snow loads. This is a professional response to the needs of the modern energy sector, combining innovative engineering with economic operational efficiency. ## Notable figures - Efficiency of 22.0% is 0.5pp below the \*\*TOPCon 450-500W\*\* median (22.5%) - Power density of 220.1 W/m² is 5.1 W/m² below \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - needs more roof space - 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 warranty does the Resun Solar RS8K-M series come with? The RS8K-M series includes a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty. Resun Solar guarantees that after 30 years of operation the module will retain at least 87.4% of its nominal power output. The TOPCon cell technology and minimized light-induced degradation (LID) effect mean real-world performance often exceeds these minimum thresholds. ### Is the Resun Solar RS8K-M suitable only for utility-scale farms, or can it be installed on a residential rooftop? The RS8K-M series, with modules rated up to 495 W and 210 mm large-format cells, is optimized for utility-scale solar farms and large industrial facilities. The physical dimensions can make rooftop transport and mounting challenging for a typical single-family home. For residential prosumer systems, smaller modules from Resun Solar's residential-focused series are generally a better fit. ### What is TOPCon technology and why is it better than PERC in the RS8K-M series? TOPCon (Tunnel Oxide Passivated Contact) is an n-type cell technology that applies an ultra-thin silicon oxide layer to the rear cell surface, dramatically reducing carrier recombination. Compared to standard p-type PERC cells, this results in higher efficiency up to 22.9%, a lower temperature coefficient (around -0.30%/°C), and slower long-term degradation across the full 30-year warranty period. ### How does the RS8K-M series perform in high temperatures during summer? Thanks to TOPCon technology, the power temperature coefficient is approximately -0.30%/°C, meaning at a module temperature of 65°C (typical on a hot summer day) the panel loses about 12.5% of its nominal power. This outperforms standard PERC cells, which typically show a coefficient of -0.35%/°C. The result is measurably higher energy yields during peak summer months, a critical advantage at the scale of utility solar farms. ### Are the RS8K-M modules rated for rain, snow loads, and high wind? Yes. The RS8K-M series features a robust aluminum alloy frame and high-transmittance tempered glass, certified to IEC 61215 and IEC 61730 standards. The modules are rated for snow loads up to 5,400 Pa and wind pressure up to 2,400 Pa, meeting the structural requirements for most Central European locations, including areas with heavy snowfall or strong seasonal winds. ### How does the RS8K-M differ from bifacial modules and is the monofacial version worth choosing? The RS8K-M is a monofacial module and does not generate power from reflected rear-side irradiance. On a ground-mounted farm with a high-albedo surface, a bifacial module can produce 5–15% additional energy. However, the RS8K-M offers a lower unit cost and simpler mounting logistics, making it the economically optimal choice for installations on dark or vegetated ground surfaces, industrial rooftops, or any site where rear-side gain would be negligible. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS8K-M-470-495W-TOPCON-16bb-4c6dec51e73c.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-475 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.