--- title: "Resun Solar RS6K-325M 325W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS6K-325M 325W solar panel. Specs: 19.26% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs6k-325m" updated: 2026-09-11 --- # Resun Solar RS6K-325M Warranty pick, no clear weak spot 2,867 panels in the 225-425 W band, all technologies ## Identity - **Manufacturer:** Resun Solar - **Model:** RS6K-325M - **Series:** RS6K-M FULL BLACK - **Rated power:** 325 W - **Cell technology:** Monocrystalline ## How it compares Compared against 225-425 W band, all technologies (2867 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 325 W | 390 W | Weak - bottom 16% | | | Module efficiency | 19.26% | 20.20% | Typical | 12,835 | | Power density | 192.6 | 202.1 | Typical | 12,806 | | Temperature coefficient | -0.340 | -0.350 | Typical | 8,778 | | Weight (kg) | 19.0 kg | 21.1 kg | Typical | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 19% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.26% | 20.20% | Typical | 12,835 | | Power density | 192.6 | 202.1 | Typical | 12,806 | | Temperature coefficient | -0.340 | -0.350 | Typical | 8,778 | | Weight per kWp | 58.5 | 56.0 | Typical | 11,732 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 19% | 21 | ### Strengths - **30 year performance warranty** - Top 19% of the 225-425 W band, against a median of 25 yrs. - **Best for:** Residential, shaded-installations and BIPV. ## Specification ### Electrical - **Rated power (Pmax):** 325 W - **Efficiency:** 19.26 % - **Voltage at Pmax (Vmp):** 33.60 V - **Current at Pmax (Imp):** 9.68 A - **Open-circuit voltage (Voc):** 41.10 V - **Short-circuit current (Isc):** 10.20 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/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:** 120 ### Physical - **Length:** 1684 mm - **Width:** 1002 mm - **Thickness:** 35 mm - **Weight:** 19.0 kg - **Area:** 1.69 m2 - **Power density:** 192.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 275 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12835 of 14005 | | Power density | 12806 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 11732 of 14005 | | Warranty | 21 of 14005 | ## About this series The RS6K-M Full Black series consists of monocrystalline photovoltaic modules designed with both residential rooftop aesthetics and installation reliability in mind. These panels combine **half-cut** technology with **multi-busbar** cells, reducing internal power loss and lowering the risk of microcracks and busbar breakage, which significantly extends the module's service life. By splitting cells in half, the panel maintains strong resistance to hot-spot effects caused by partial shading, such as from chimneys, antennas, or fallen leaves, making it a solid choice for roofs with irregular sun exposure. The fully black frame and black backsheet give the module a uniform, sleek appearance that blends seamlessly with modern architecture, a feature favored by homeowners who care about the visual impact of their installation. The construction is **PID-free**, ensuring stable performance over the long term. The panels hold CE, TÜV, IEC 61215, IEC 61730, and VDE certifications, confirming compliance with international quality and safety standards. The RS6K-M Full Black is well suited both for pitched-roof installations and smaller systems with limited space, where aesthetics matter just as much as consistent energy output, even under challenging sunlight conditions. ## Notable figures - Module efficiency of 19.3% is 2.6pp below average for \*\*database\*\* panels (median: 21.8%) - 192.6 W/m² power density is 25.5 W/m² below \*\*database\*\* median (218.1 W/m²) - requires larger installation area - -0.34%/°C temperature coefficient - 0.04pp worse than \*\*database\*\* median (-0.30%/°C), expect higher hot weather losses - 19.0 kg weight - 7.5 kg lighter than \*\*database\*\* median (26.5 kg), reducing installation effort - #12835 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### Are Resun Solar RS6K-M Full Black panels suitable for a sloped residential roof? Yes, the RS6K-M Full Black series is designed for residential prosumer installations on sloped roofs. The all-black frame and black backsheet give a uniform, aesthetic look without visible grid lines, which matters on roofs visible from the street. The half-cut construction also handles partial shading from chimneys or antennas well, a common issue on sloped roofs. ### How does the half-cut technology in RS6K-M Full Black differ from standard full-cell panels? In half-cut technology, cells are cut in half and wired into two independent circuits. This reduces the current flowing through each cell, lowering resistive losses and improving efficiency. It also means that under partial shading, only half the module shuts down instead of the whole panel, limiting power loss and reducing the risk of hot-spot damage in the shaded area. ### What warranty comes with RS6K-M Full Black panels and what does it cover? Resun Solar provides a 12-year product warranty covering material and workmanship defects, plus a 30-year power output warranty guaranteeing a defined performance level over that period. This matches the standard offered by leading manufacturers and gives investors confidence in the long-term return on their installation. ### What is the maximum power output of the RS6K-M Full Black panel, and how many are needed for a 5 kW system? Panels in the RS6K-M Full Black series reach up to 340 Wp. For a roughly 5 kW system, you would need approximately 14-15 modules, depending on the chosen inverter and system losses. The exact number should be confirmed with an installer based on available roof space and energy needs. ### Is the RS6K-M Full Black a bifacial panel? No, the RS6K-M Full Black series is a monofacial monocrystalline panel, not designed to generate energy from reflected light on the rear side. It targets residential rooftop installations, where bifacial gains are typically limited anyway due to lack of clearance beneath the module. ### Are RS6K-M Full Black panels resistant to PID degradation and microcracks? Yes, the modules are built with PID-free technology, meaning they are protected against potential-induced degradation and maintain stable performance over their operating lifetime. The half-cut, multi-busbar cell design further reduces the risk of microcracks and busbar interruption, improving durability under harsh weather conditions. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS6K-M-FULL-BLACK-325-340W-min-a11beaa4625a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Cooler, lighter, +4.1 pp | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, lighter, +4.1 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, lighter, +4.0 pp | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | Cooler, +3.9 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | Cooler, +3.9 pp, -5 yr warranty | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | -40 W, lighter, +3.7 pp | | [Gamko New Energy GKA182M300W](https://comparepv.com/panel/gamko-new-energy-gka182m300w) | 300 W | -25 W, lighter, +3.7 pp | | [Gamko New Energy GKA210M320W](https://comparepv.com/panel/gamko-new-energy-gka210m320w) | 320 W | Lighter, +3.7 pp | | [Gamko New Energy GKA210M340W](https://comparepv.com/panel/gamko-new-energy-gka210m340w) | 340 W | +15 W, lighter, +3.7 pp | | [Resun Solar RS6K-330M](https://comparepv.com/panel/resun-solar-rs6k-330m) | 330 W | +0.3 pp | | [Resun Solar RS6K-335M](https://comparepv.com/panel/resun-solar-rs6k-335m) | 335 W | +10 W, +0.6 pp | | [Resun Solar RS6K-340M](https://comparepv.com/panel/resun-solar-rs6k-340m) | 340 W | +15 W, +0.9 pp | | [Jetion JT440SYK(B)](https://comparepv.com/panel/jetion-jt440syk-b) | 440 W | +115 W, cooler, +3.6 pp | | [Jetion JT435SYk(B)](https://comparepv.com/panel/jetion-jt435syk-b) | 435 W | +110 W, cooler, +3.4 pp | | [Maxeon SPR-MAX3-400-COM](https://comparepv.com/panel/maxeon-spr-max3-400-com) | 400 W | +75 W, +3.3 pp, +10 yr warranty | | [Jetion JT430SYk(B)](https://comparepv.com/panel/jetion-jt430syk-b) | 430 W | +105 W, cooler, +3.1 pp | --- Source: https://comparepv.com/panel/resun-solar-rs6k-325m Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.