--- title: "Resun Solar RS9V-M-DG-590 590W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS9V-M-DG-590 590W solar panel. Specs: 23.08% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs9v-m-dg-590" updated: 2026-09-11 --- # Resun Solar RS9V-M-DG-590 Space saver, no clear weak spot 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Resun Solar - **Model:** RS9V-M-DG-590 - **Series:** RS9V-M-DG - **Rated power:** 590 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 550-600 W (1018 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 590 W | 580 W | Strong - top 18% | | | Module efficiency | 23.08% | 22.44% | Strong - top 3% | 1,677 | | Power density | 230.8 | 224.4 | Strong - top 3% | 1,650 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight (kg) | 31.2 kg | 31.2 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.08% | 22.44% | Strong - top 3% | 1,677 | | Power density | 230.8 | 224.4 | Strong - top 3% | 1,650 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight per kWp | 52.9 | 53.8 | Typical | 6,589 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **230.8 watts per square metre** - Top 3% of the TOPCon 550-600 W segment, against a median of 224.4. Ranked 1,650th in the whole database. - **23.08% module efficiency** - Top 3% of the TOPCon 550-600 W segment, against a median of 22.44%. Ranked 1,677th in the whole database. - **Best for:** Commercial and utility-scale. ## Specification ### Electrical - **Rated power (Pmax):** 590 W - **Efficiency:** 23.08 % - **Voltage at Pmax (Vmp):** 33.80 V - **Current at Pmax (Imp):** 17.46 A - **Open-circuit voltage (Voc):** 40.25 V - **Short-circuit current (Isc):** 18.51 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:** 108 - **Bifacial:** yes - **Bifacial gain:** 10.00 ### Physical - **Length:** 1962 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 31.2 kg - **Area:** 2.56 m2 - **Power density:** 230.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 499 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1677 of 14005 | | Power density | 1650 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 6589 of 14005 | | Warranty | 21 of 14005 | ## About this series The RS9V-M-DG series consists of bifacial photovoltaic modules built around **N-type TOPCon cells**, combining high conversion efficiency with a lower temperature coefficient than conventional P-type designs. The use of **MBB (multi-busbar) technology** reduces resistive losses and improves current collection uniformity across the cell surface, resulting in more stable energy yield under partial shading conditions. The panel features a **dual glass construction**, boosting mechanical strength and module lifespan, and thanks to its high **bifaciality** it captures additional energy reflected from the ground, making it especially well suited for ground-mount installations and light-colored roof surfaces. Strong resistance to PID (potential-induced degradation) together with compatibility with **1500V** systems helps lower BoS costs and simplifies design for large commercial installations and utility-scale PV farms. This is a solution for investors seeking modules with long service life, predictable power degradation over time, and rugged construction able to withstand demanding operating conditions, setting it apart from standard monofacial P-type panels. ## Notable figures - At 23.1% efficiency, this panel is 0.6pp above typical \*\*TOPCon 550-600W\*\* modules (median: 22.4%) - 230.8 W/m² power density - 6.4 W/m² more than \*\*TOPCon 550-600W\*\* median (224.4 W/m²), more power per roof area - At -0.30%/°C, hot weather performance is typical for \*\*TOPCon 550-600W\*\* panels - #1677 for efficiency, #6093 for temperature performance out of 14005 panels ## Questions ### How do the N-type TOPCon cells in the RS9V-M-DG differ from classic P-type cells? The N-type TOPCon cells used in the RS9V-M-DG series deliver higher conversion efficiency and a lower temperature coefficient than P-type PERC cells, meaning less power loss on hot days. They also degrade more slowly over time and resist LID better, resulting in higher annual energy yield, especially in warmer climates. ### Do bifacial RS9V-M-DG panels actually generate more energy? Yes, thanks to the dual glass design and transparent rear side, the module captures additional light reflected off the ground, which over a bright surface, gravel, or white roof membrane can boost yield by several to over a dozen percent compared to a standard monofacial panel. The effect is strongest in ground-mount installations and elevated racking systems where light can freely reach the panel's underside. ### What warranty comes with Resun Solar RS9V-M-DG panels? Resun Solar provides a 15-year product warranty and a 30-year linear power output warranty for the RS9V-M-DG series. This warranty length is typical for modern TOPCon modules and reflects a predictable, gradual power decline over the years, making return-on-investment planning easier. ### Are RS9V-M-DG panels compatible with 1500V systems and large-scale PV farms? Yes, RS9V-M-DG modules are designed for systems up to 1500V, allowing longer string configurations and fewer cables and inverters in large installations. Combined with strong resistance to potential-induced degradation (PID), this reduces balance-of-system (BoS) costs on commercial projects and utility-scale solar farms. ### What is the maximum power output of the RS9V-M-DG, and how many panels are needed for a typical home installation? The highest-power version in the RS9V-M-DG series reaches 590 Wp. A typical 10 kWp residential system requires roughly 17 such panels, though the exact number depends on available roof area and inverter configuration. The high per-module power output helps fit more kilowatts onto a limited roof surface. ### Does the multi-busbar (MBB) technology in the RS9V-M-DG affect performance under partial shading? Yes, MBB technology spreads more narrow conductive paths across the cell surface, reducing resistive losses and improving current collection uniformity. In practice, this means a smaller performance drop when part of the panel is shaded, such as by a chimney, antenna, or passing cloud, compared to older designs with fewer busbars. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS9V-M-DG-550-590W-RETIE-version-58b25eb54715.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +50 W, lighter, +1.7 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +1.5 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +45 W, lighter, +1.5 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +40 W, cooler, +1.3 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | -40 W, lighter, +1.3 pp | | [Resun Solar RS9V-M-DG-550](https://comparepv.com/panel/resun-solar-rs9v-m-dg-550) | 550 W | -40 W, -1.6 pp | | [Resun Solar RS9V-M-DG-555](https://comparepv.com/panel/resun-solar-rs9v-m-dg-555) | 555 W | -35 W, -1.4 pp | | [Resun Solar RS9V-M-DG-560](https://comparepv.com/panel/resun-solar-rs9v-m-dg-560) | 560 W | -30 W, -1.2 pp | | [Resun Solar RS9V-M-DG-565](https://comparepv.com/panel/resun-solar-rs9v-m-dg-565) | 565 W | -25 W, -1.0 pp | | [Resun Solar RS9V-M-DG-570](https://comparepv.com/panel/resun-solar-rs9v-m-dg-570) | 570 W | -20 W, -0.8 pp | | [Resun Solar RS9V-M-DG-575](https://comparepv.com/panel/resun-solar-rs9v-m-dg-575) | 575 W | -15 W, -0.6 pp | | [Resun Solar RS9V-M-DG-580](https://comparepv.com/panel/resun-solar-rs9v-m-dg-580) | 580 W | -10 W, -0.4 pp | | [Resun Solar RS9V-M-DG-585](https://comparepv.com/panel/resun-solar-rs9v-m-dg-585) | 585 W | Very close match | | [Jetion JT590SJk(B)](https://comparepv.com/panel/jetion-jt590sjk-b) | 590 W | Cooler | | [Jetion JT585SJk(B)](https://comparepv.com/panel/jetion-jt585sjk-b) | 585 W | Cooler | --- Source: https://comparepv.com/panel/resun-solar-rs9v-m-dg-590 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.