--- title: "Resun Solar RS8V-M-420W FULL BLACK 420W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS8V-M-420W FULL BLACK 420W solar panel. Specs: 21.51% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs8v-m-420w-full-black" updated: 2026-09-11 --- # Resun Solar RS8V-M-420W FULL BLACK Strong in heat, needs the roof space 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Resun Solar - **Model:** RS8V-M-420W FULL BLACK - **Series:** RS8V-M FULL BLACK (N-type TOPCon) - **Rated power:** 420 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 420 W | 435 W | Weak - bottom 16% | | | Module efficiency | 21.51% | 22.00% | Weak - bottom 20% | 7,894 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.250 | -0.290 | Strong - top 1% | 456 | | Weight (kg) | 21.5 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.51% | 22.00% | Weak - bottom 20% | 7,894 | | Power density | 215.1 | 220.2 | Weak - bottom 19% | 7,882 | | Temperature coefficient | -0.250 | -0.290 | Strong - top 1% | 456 | | Weight per kWp | 51.2 | 51.4 | Typical | 4,567 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.250 %/°C temperature coefficient** - Top 1% of the TOPCon 400-450 W segment, against a median of -0.290. Ranked 456th in the whole database. ### Watch out for - **215.1 watts per square metre** - Bottom 19% of the TOPCon 400-450 W segment, against a median of 220.2. - **21.51% module efficiency** - Bottom 20% of the TOPCon 400-450 W segment, against a median of 22.00%. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 420 W - **Efficiency:** 21.51 % - **Voltage at Pmax (Vmp):** 31.78 V - **Current at Pmax (Imp):** 13.22 A - **Open-circuit voltage (Voc):** 37.58 V - **Short-circuit current (Isc):** 14.11 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.250 %/degC - **Temperature coefficient of Voc:** -0.300 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.5 kg - **Area:** 1.95 m2 - **Power density:** 215.1 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:** 367 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7894 of 14005 | | Power density | 7882 of 14005 | | Temperature coefficient | 456 of 14005 | | Weight | 4567 of 14005 | | Warranty | 21 of 14005 | ## About this series The Resun Solar RS8V-M FULL BLACK (N-type TOPCon) series are modules designed for maximum aesthetics and stable performance in real roof conditions. The full, uniform finish creates a cohesive surface with the covering - it looks particularly good on modern homes and buildings with high visual requirements. The use of **N-type TOPCon solar cells** helps to minimize typical yield losses over time and supports high efficiency even when solar irradiance is not ideal. In practice, this series solves the problem of limited mounting area - thanks to its refined design, it is easier to achieve a strong installation even on a smaller roof. **Multi-busbar technology** reduces internal losses and improves performance under partial shading, and the **full black finish** is an advantage over standard modules with light-colored components. For investors, the **longer linear warranty** is also important, which makes it easier to plan profitability over the years. This is a good choice for homes, small businesses, and premium installations, where appearance, durability, and predictable yield are important. ## Notable figures - At 21.5% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - 215.1 W/m² power density is 5.1 W/m² below \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - requires larger installation area - -0.25%/°C temperature coefficient (median: -0.29%/°C) - retains ~2% more power at high temperatures - Ranked #7894 out of 14005 panels for efficiency in the database ## Questions ### What warranty does the Resun Solar RS8V-M FULL BLACK TOPCon panel come with? The RS8V-M FULL BLACK series comes with a 15-year product warranty covering manufacturing defects and a 30-year linear power warranty guaranteeing at least 87.4% of nominal power output by the end of the warranty period. This is among the longer standard warranties available for residential PV modules, making long-term ROI planning more reliable. ### How do the Resun Solar RS8V-M FULL BLACK panels perform in winter and low-light conditions? Very well. N-type TOPCon cells feature a temperature coefficient of Pmax at -0.30%/°C, meaning lower power losses during hot summer days compared to older PERC technology. In low-irradiance conditions — winter months or overcast days — N-type TOPCon modules generate proportionally more energy than P-type modules, thanks to their higher base efficiency of up to 22.28%. ### How is the RS8V-M FULL BLACK different from standard black-frame solar panels? Standard black-frame panels still have a white or transparent backsheet, which breaks the visual uniformity of the roof surface. The RS8V-M FULL BLACK features a fully black backsheet, frame, and busbar grid for a seamless, uniform appearance. Beyond aesthetics, its N-type TOPCon cells deliver higher efficiency and slower long-term degradation compared to most PERC-based full-black modules. ### How many Resun RS8V-M 435W panels are needed to build a 5 kWp system on a small roof? You need approximately 12 panels to reach a 5.22 kWp system. Each module measures 1722×1134 mm, so 12 units require roughly 23.4 m² of roof area before accounting for mounting clearances. With module efficiency up to 22.28%, the RS8V-M FULL BLACK allows you to maximize output on roofs with limited available surface. ### Is TOPCon technology in the RS8V-M FULL BLACK worth the premium over PERC? For installations limited by roof area or with high aesthetic requirements, yes. TOPCon cells offer higher efficiency, a lower temperature coefficient, and lower susceptibility to PID compared to PERC. Over a 25–30-year system lifetime, the higher energy yield can offset the higher upfront module cost, especially when net-metering tariffs or electricity purchase prices are favorable. ### Are the Resun Solar RS8V-M FULL BLACK panels rated for high wind and snow loads? Yes. The RS8V-M FULL BLACK series is certified for wind load resistance up to 2400 Pa and snow load up to 5400 Pa. This makes the panels suitable for Central European climates where heavy snowfall and strong wind gusts are common seasonal stresses on rooftop installations. The modules also carry certification for salt mist and ammonia resistance. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS8V-M-TOPCON-full-black-420W-435W-2-fd36a28a9aec.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [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 | +45 W, hotter, +2.3 pp | | [Luxor Solar LX-465M/182R-96+ GG](https://comparepv.com/panel/luxor-lx-465m-182r-96-gg) | 465 W | +45 W, heavier, +2.3 pp | | [Maxeon SPR-MAX7-470](https://comparepv.com/panel/maxeon-spr-max7-470) | 470 W | +50 W, +2.2 pp, +10 yr warranty | | [AIKO AIKO-A470-MAH54Mb](https://comparepv.com/panel/aiko-aiko-a470-mah54mb) | 470 W | +50 W, hotter, +2.1 pp | | [AIKO AIKO-A460-MAH54Mb](https://comparepv.com/panel/aiko-shenzhen-aiko-digital-energy-technology-co-ltd-aiko-a460-mah54mb-1) | 460 W | +40 W, hotter, +2.1 pp | | [TCL Zhonghuan HSM-BD54-LA470](https://comparepv.com/panel/tcl-zhonghuan-hsm-bd54-la470) | 470 W | +50 W, hotter, +2.1 pp | | [Resun Solar RS8V-M-400](https://comparepv.com/panel/resun-solar-rs8v-m-400) | 400 W | -20 W, hotter, -1.0 pp | | [Resun Solar RS8V-M-405](https://comparepv.com/panel/resun-solar-rs8v-m-405) | 405 W | -15 W, hotter, -0.8 pp | | [Resun Solar RS8V-M-410W](https://comparepv.com/panel/resun-solar-rs8v-m-410w) | 410 W | -10 W, hotter, -0.5 pp | | [Resun Solar RS8V-M-415W](https://comparepv.com/panel/resun-solar-rs8v-m-415w) | 415 W | Hotter, -0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +90 W, heavier, +3.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +75 W, hotter, +3.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +85 W, heavier, +3.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +70 W, hotter, +3.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +80 W, heavier, +3.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +80 W, hotter, +3.0 pp | --- Source: https://comparepv.com/panel/resun-solar-rs8v-m-420w-full-black 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.