--- title: "Resun Solar RS8V425M-FB 425W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS8V425M-FB 425W solar panel. Specs: 21.76% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs8v425m-fb" updated: 2026-09-11 --- # Resun Solar RS8V425M-FB Middle of its segment, weak in heat 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Resun Solar - **Model:** RS8V425M-FB - **Series:** RS8V-M-FB - **Rated power:** 425 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) | 425 W | 435 W | Typical | | | Module efficiency | 21.76% | 22.00% | Typical | 7,285 | | Power density | 217.6 | 220.2 | Typical | 7,172 | | Temperature coefficient | -0.350 | -0.290 | Weak - bottom 3% | 10,419 | | 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 | 21.76% | 22.00% | Typical | 7,285 | | Power density | 217.6 | 220.2 | Typical | 7,172 | | Temperature coefficient | -0.350 | -0.290 | Weak - bottom 3% | 10,419 | | Weight per kWp | 50.6 | 51.4 | Typical | 3,991 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.350 %/°C temperature coefficient** - Bottom 3% of the TOPCon 400-450 W segment, against a median of -0.290. Ranked 10,419th in the whole database. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.76 % - **Voltage at Pmax (Vmp):** 31.94 V - **Current at Pmax (Imp):** 13.31 A - **Open-circuit voltage (Voc):** 37.71 V - **Short-circuit current (Isc):** 14.19 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.350 %/degC - **Temperature coefficient of Voc:** -0.320 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 45 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:** 217.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 359 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7285 of 14005 | | Power density | 7172 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 3991 of 14005 | | Warranty | 21 of 14005 | ## About this series The RS8V-M-FB series consists of Full Black photovoltaic modules designed for installations where both energy performance and visual appeal matter. The panels use **monocrystalline TOPCon cells** with **multi-busbar and half-cell technology**, which reduces internal power losses within the module and increases resistance to microcracks and busbar damage. The half-cell design further minimizes the risk of hot-spot effects caused by partial shading, allowing the module to maintain stable performance even in more demanding mounting conditions, such as roofs with nearby chimneys or antennas. The all-black styling makes the series particularly popular for residential installations, where roof appearance carries aesthetic weight. The manufacturer provides **high PID resistance**, translating into lower power degradation over time and a reduced LCOE for the energy the installation produces. Tempered glass with enhanced light transmittance improves energy yield under low-light conditions, and the module is certified for resistance to high wind and snow loads as well as salt mist and ammonia exposure. It's a solid choice for installers and investors seeking an aesthetic, reliable premium panel for residential and commercial applications. ## Notable figures - At 21.8% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - Power density of 217.6 W/m² matches the \*\*TOPCon 400-450W\*\* median - -0.35%/°C temperature coefficient - 0.06pp worse than \*\*TOPCon 400-450W\*\* median (-0.29%/°C), expect higher hot weather losses - #7285 for efficiency, #10419 for temperature performance out of 14005 panels ## Questions ### What warranty does the Resun Solar RS8V-M-FB series come with? The manufacturer provides a 15-year product warranty and a 30-year power output warranty. This means the module maintains a guaranteed level of energy production for three decades, while manufacturing or material defects during the first 15 years are covered by direct manufacturer support. This is a standard offering for premium TOPCon panels. ### How does TOPCon cell technology in the RS8V-M-FB differ from standard PERC cells? TOPCon cells used in the RS8V-M-FB feature an additional passivation layer that reduces electron recombination and increases conversion efficiency compared to older PERC cells. In practice, this results in higher power output from the same module area, better performance at high temperatures, and slower power degradation over the years of operation. ### Are RS8V-M-FB panels suitable for a residential roof in terms of appearance? Yes, the Full Black series was specifically designed with residential roof aesthetics in mind. The black frame, black backsheet, and black busbars help the panel blend into the roof surface, making it a popular choice for homeowners who care about the visual appearance of their installation, for example on visible sloped residential roofs. ### Does the half-cell design in the RS8V-M-FB protect against hot-spot effects caused by shading from a chimney or antenna? Yes, splitting cells into half-cut units with multi-busbar technology reduces power losses and the risk of localized overheating when part of the module is shaded, for instance by a chimney or antenna. As a result, the panel maintains more stable performance than modules with full-size cells under similar mounting conditions. ### What is the maximum power output of the RS8V-M-FB module, and is it a bifacial panel? The RS8V-M-FB module reaches a maximum power output of 435 Wp. It is a mono-facial panel, not bifacial, meaning it generates energy only from its front surface. This is a standard and sufficient solution for most rooftop installations, where bifacial panels would not provide additional benefits. ### Are RS8V-M-FB panels resistant to harsh conditions such as strong wind, snow, or salt air? Yes, the modules are certified for high wind and snow load resistance, as well as resistance to salt mist and ammonia exposure, making them suitable for both coastal installations and agricultural sites near livestock facilities. Additionally, high PID resistance limits power degradation over time. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS8V-M-FB-420-435W-8279b959cd07.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | Cooler, +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, cooler, +2.0 pp | | [JA Solar JAT54S40-475/LR](https://comparepv.com/panel/ja-solar-jat54s40-475-lr) | 475 W | +50 W, cooler, +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 | | [Resun Solar RS8V-M-400](https://comparepv.com/panel/resun-solar-rs8v-m-400) | 400 W | -25 W, -1.3 pp | | [Resun Solar RS8V-M-405](https://comparepv.com/panel/resun-solar-rs8v-m-405) | 405 W | -20 W, -1.0 pp | | [Resun Solar RS8V-M-410W](https://comparepv.com/panel/resun-solar-rs8v-m-410w) | 410 W | -15 W, -0.8 pp | | [Resun Solar RS8V-M-415W](https://comparepv.com/panel/resun-solar-rs8v-m-415w) | 415 W | -10 W, -0.5 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 | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +65 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +75 W, cooler, +2.7 pp | --- Source: https://comparepv.com/panel/resun-solar-rs8v425m-fb Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.