--- title: "Resun Solar RS8V-M-400W 400W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS8V-M-400W 400W solar panel. Specs: 20.48% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs8v-m-400w" updated: 2026-09-11 --- # Resun Solar RS8V-M-400W Middle of its segment, weak in heat 6,519 panels in the 300-500 W band, all technologies ## Identity - **Manufacturer:** Resun Solar - **Model:** RS8V-M-400W - **Series:** RS8V-M - **Rated power:** 400 W - **Cell technology:** Monocrystalline ## How it compares Compared against 300-500 W band, all technologies (6519 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 400 W | 435 W | Weak - bottom 24% | | | Module efficiency | 20.48% | 21.30% | Typical | 11,468 | | Power density | 204.8 | 212.6 | Typical | 11,370 | | Temperature coefficient | -0.350 | -0.300 | Weak - bottom 23% | 10,419 | | Weight (kg) | 22.0 kg | 22.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.48% | 21.30% | Typical | 11,468 | | Power density | 204.8 | 212.6 | Typical | 11,370 | | Temperature coefficient | -0.350 | -0.300 | Weak - bottom 23% | 10,419 | | Weight per kWp | 55.0 | 53.2 | Typical | 9,361 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.350 %/°C temperature coefficient** - Bottom 23% of the 300-500 W band, against a median of -0.300. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 20.48 % - **Voltage at Pmax (Vmp):** 31.01 V - **Current at Pmax (Imp):** 12.90 A - **Open-circuit voltage (Voc):** 37.07 V - **Short-circuit current (Isc):** 13.79 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 count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 22.0 kg - **Area:** 1.95 m2 - **Power density:** 204.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 338 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11468 of 14005 | | Power density | 11370 of 14005 | | Temperature coefficient | 10419 of 14005 | | Weight | 9361 of 14005 | | Warranty | 21 of 14005 | ## About this series The RS8V-M series from Resun Solar consists of monocrystalline panels built with **half-cut cell technology**, splitting each cell in half to reduce internal power loss and boost the module's overall energy conversion efficiency. The use of **multi-busbar** cells lowers internal resistance and improves current collection across the cell surface, resulting in more stable energy output even under suboptimal lighting conditions. The split-cell design significantly increases **resistance to hot-spot effects** caused by partial shading, a key advantage for installations exposed to shadows from chimneys, trees, or neighboring buildings. These panels also carry a reduced risk of microcracks and busbar damage, translating into higher **long-term reliability** and slower power degradation over the module's lifespan. A robust build featuring 3.2mm tempered glass and an IP68-rated junction box makes the RS8V-M series well suited for both residential rooftops and commercial installations, where predictable performance and low failure rates matter most. It's a solid choice for investors seeking proven monocrystalline technology at a reasonable price point, without compromising on build quality or IEC-certified standards and confirmed PID-free performance. ## Notable figures - Module efficiency of 20.5% is 1.3pp below average for \*\*database\*\* panels (median: 21.8%) - Power density of 204.8 W/m² is 13.3 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - At -0.35%/°C, loses 0.05pp more power per degree than \*\*database\*\* median (-0.30%/°C) - At 22.0 kg, this panel is 4.5 kg lighter than \*\*database\*\* median (26.5 kg) - easier handling during installation - #11468 for efficiency, #10419 for temperature performance out of 14005 panels ## Questions ### What warranty comes with Resun Solar RS8V-M panels? The RS8V-M series comes with a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. This means the manufacturer guarantees a defined performance level even after three decades of use, which is an important factor when calculating the return on investment of a solar installation. ### What is half-cut cell technology in the RS8V-M panels and is it worth it? Half-cut technology splits standard silicon cells in half, reducing current losses and internal resistance in the module. This gives the RS8V-M panel higher energy efficiency and better performance under partial shading, such as from chimneys or antennas. It's a proven approach now used in most modern monocrystalline panels and worth choosing for any installation. ### Are RS8V-M panels resistant to the hot-spot effect under shading? Yes, thanks to the split-cell design and multi-busbar structure, RS8V-M panels show increased resistance to the hot-spot effect that occurs under partial shading. This matters for installations exposed to shadows from trees, chimneys, or neighboring buildings, where the risk of localized cell overheating is higher. ### What is the maximum power output of the RS8V-M series panels? RS8V-M series panels reach a maximum power output of up to 415 Wp. That's a solid figure for a monocrystalline module in this price segment, allowing efficient use of available roof space in both residential and commercial installations. ### Are RS8V-M panels resistant to PID degradation? Yes, the RS8V-M series has confirmed resistance to PID, or potential-induced degradation, which can reduce panel power output due to current leakage to the frame or substrate. The panels have passed IEC-compliant testing, ensuring stable energy production throughout the system's operating life. ### Are Resun Solar RS8V-M panels suitable for both residential and commercial installations? Yes, thanks to their robust construction with 3.2 mm tempered glass and an IP68-rated enclosure, RS8V-M panels work well on both single-family home roofs and larger commercial installations. Their predictable performance and low failure rate make them a versatile choice for different types of solar projects. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS8V-M-400-415W-min-fcfe189ff457.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | +40 W, cooler, +2.6 pp | | [Just Solar JST-EDMH-(445-465)W-TD (450W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-450w-class) | 450 W | +50 W, cooler, +2.6 pp | | [Q-SUN Solar QNN182-HG450-54](https://comparepv.com/panel/qn-solar-pv-limited-qnn182-hg450-54) | 450 W | +50 W, cooler, +2.6 pp | | [Huayao HY440-N108BDD](https://comparepv.com/panel/huayao-hy440-n108bdd) | 450 W | +50 W, cooler, +2.6 pp | | [BYD NLBK-27-450](https://comparepv.com/panel/byd-nlbk-27-450) | 450 W | +50 W, cooler, +2.6 pp | | [Renesola RS41-450NBG-E3](https://comparepv.com/panel/renesola-rs41-450nbg-e3) | 450 W | +50 W, cooler, +2.6 pp | | [Resun Solar RS8V-M-405](https://comparepv.com/panel/resun-solar-rs8v-m-405) | 405 W | +0.3 pp | | [Resun Solar RS8V-M-410W](https://comparepv.com/panel/resun-solar-rs8v-m-410w) | 410 W | +10 W, +0.5 pp | | [Resun Solar RS8V-M-415W](https://comparepv.com/panel/resun-solar-rs8v-m-415w) | 415 W | +15 W, +0.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +110 W, cooler, +4.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +95 W, cooler, +4.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +105 W, cooler, +4.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +90 W, cooler, +4.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +100 W, cooler, +4.0 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +100 W, cooler, +4.0 pp | --- Source: https://comparepv.com/panel/resun-solar-rs8v-m-400w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.