--- title: "Resun Solar RS8I-M-DG-565 565W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS8I-M-DG-565 565W solar panel. Specs: 21.87% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs8i-m-dg-565" updated: 2026-09-11 --- # Resun Solar RS8I-M-DG-565 Middle of its segment, needs the roof space 1,018 panels in the segment TOPCon 550-600 W ## Identity - **Manufacturer:** Resun Solar - **Model:** RS8I-M-DG-565 - **Series:** RS8I-M-DG - **Rated power:** 565 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) | 565 W | 580 W | Weak - bottom 17% | | | Module efficiency | 21.87% | 22.44% | Weak - bottom 19% | 6,908 | | Power density | 218.6 | 224.4 | Weak - bottom 16% | 6,921 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight (kg) | 31.5 kg | 31.2 kg | Weak - bottom 22% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.87% | 22.44% | Weak - bottom 19% | 6,908 | | Power density | 218.6 | 224.4 | Weak - bottom 16% | 6,921 | | Temperature coefficient | -0.300 | -0.290 | Typical | 6,093 | | Weight per kWp | 55.8 | 53.8 | Weak - bottom 22% | 10,143 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **218.6 watts per square metre** - Bottom 16% of the TOPCon 550-600 W segment, against a median of 224.4. - **21.87% module efficiency** - Bottom 19% of the TOPCon 550-600 W segment, against a median of 22.44%. - **55.8 kg per kWp** - Bottom 22% of the TOPCon 550-600 W segment, against a median of 53.8. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Roofs where every square metre has to count, tight roof space and weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 565 W - **Efficiency:** 21.87 % - **Voltage at Pmax (Vmp):** 42.62 V - **Current at Pmax (Imp):** 13.26 A - **Open-circuit voltage (Voc):** 51.20 V - **Short-circuit current (Isc):** 14.06 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:** 144 - **Bifacial:** yes - **Bifacial gain:** 10.00 ### Physical - **Length:** 2279 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 31.5 kg - **Area:** 2.58 m2 - **Power density:** 218.6 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 477 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6908 of 14005 | | Power density | 6921 of 14005 | | Temperature coefficient | 6093 of 14005 | | Weight | 10143 of 14005 | | Warranty | 21 of 14005 | ## About this series The Resun Solar RS8I-M-DG series are **double-glass (glass-glass) modules** designed for stable operation over many years in rooftop and larger farm installations. The use of **N-type cells in TOPCon technology** helps to minimize losses and maintain higher efficiency even in more demanding operating conditions. This is a solution for investors who want to maximize space utilization - thanks to **bifacial design**, the module can also generate energy from reflected light from the ground, which translates into higher yields in areas where albedo and proper mounting are critical. The RS8I-M-DG stands out due to its **half-cut technology**, which improves resistance to shading and reduces the risk of local overheating, thereby increasing the predictability of daily production. The series is suitable for installation companies looking for modules for commercial projects, carport installations, and ground-mounted systems, where the combination of bifacial operation with a robust, double-glass construction and a long-term focus on durability gives it an advantage over the competition. ## Notable figures - Module efficiency of 21.9% is 0.6pp below average for \*\*TOPCon 550-600W\*\* panels (median: 22.4%) - At 218.6 W/m², this panel generates 5.8 W/m² less per unit area than \*\*TOPCon 550-600W\*\* median (224.4 W/m²) - Temperature coefficient of -0.30%/°C matches the \*\*TOPCon 550-600W\*\* median - In the top 49% for efficiency among all TOPCon panels ## Questions ### What warranty does Resun Solar offer on the RS8I-M-DG series? Resun Solar provides a 15-year product warranty on RS8I-M-DG modules, covering manufacturing defects and material failures. In addition, the manufacturer offers a 30-year linear power warranty, guaranteeing at least 85% of rated output after that period. This extended warranty reflects the durability of the double-glass (glass-glass) construction and the inherently lower annual degradation rate of N-type TOPCon cells compared to older PERC technology. ### Are the RS8I-M-DG modules suitable for carports or ground-mounted systems? Yes, the RS8I-M-DG series is an excellent fit for carports and ground-mounted solar farms. The bifacial design captures reflected light from the ground surface, while the glass-glass encapsulation delivers superior moisture resistance and mechanical load tolerance compared to standard backsheet modules. With up to 590 Wp per module, fewer units are needed to reach the target system capacity, reducing BoS costs. ### How does the TOPCon technology in the RS8I-M-DG differ from conventional PERC cells? TOPCon (Tunnel Oxide Passivated Contact) cells are built on an N-type silicon substrate with an additional passivation layer that minimizes carrier recombination. This translates to higher module efficiency — up to 22.84% for the RS8I-M-DG — and a lower temperature coefficient of -0.32%/°C, meaning smaller output losses on hot summer days compared to standard PERC modules. N-type TOPCon also shows better resistance to LID and PID degradation. ### What is the energy gain from the bifacial design of the RS8I-M-DG, and what affects it most? The bifacial RS8I-M-DG modules harvest albedo light reflected from the ground through their active rear surface. The actual energy gain depends on ground reflectivity: white gravel or snow can add 10–20% extra yield, while green grass typically contributes 5–10%. The bifacial gain is maximized in ground-mounted or carport installations where sufficient clearance exists between the modules and the surface, allowing reflected light to reach the rear side. ### How much does an RS8I-M-DG panel weigh, and can a standard roof structure support it? The RS8I-M-DG weighs approximately 28 kg, which is 5–7 kg more than a comparable single-glass module of similar wattage — a direct result of its glass-glass construction. Before installing on a roof, a structural assessment is recommended, especially for older buildings. Modern residential roof trusses are generally built with adequate load margins, but each installation should be reviewed individually with a certified installer. ### How does half-cut cell technology in the RS8I-M-DG help under partial shading conditions? The RS8I-M-DG uses 144 half-cut cells, meaning each cell has a smaller active area and carries lower operating current. When a shadow falls on part of the module — from a chimney, antenna, or nearby obstruction — it affects only a portion of the cell strings, so the unshaded section continues generating power. Half-cut cells also reduce resistive losses and lower the risk of hot-spot formation, which extends the overall service life of the module. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS8I-M-DG-550-585W-RETIE-version-f929c4f3c04f.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +2.9 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +2.7 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | Cooler, 15 kg lighter, +2.5 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | Cooler, lighter, +2.5 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | Cooler, lighter, +2.5 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | Cooler, lighter, +2.4 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | Cooler, lighter, +2.3 pp | | [Resun Solar RS8I-M HC-535](https://comparepv.com/panel/resun-solar-rs8i-m-hc-535) | 535 W | -30 W, hotter, -1.2 pp | | [Resun Solar RS8I-540M-BD](https://comparepv.com/panel/resun-solar-rs8i-540m-bd) | 540 W | -25 W, hotter, -0.9 pp | | [Resun Solar RS8I-M HC-540](https://comparepv.com/panel/resun-solar-rs8i-m-hc-540) | 540 W | Hotter, lighter, -1.0 pp | | [Resun Solar RS8I-545M-BD](https://comparepv.com/panel/resun-solar-rs8i-545m-bd) | 545 W | Hotter, lighter, -0.7 pp | | [Resun Solar RS8I-M HC-545](https://comparepv.com/panel/resun-solar-rs8i-m-hc-545) | 545 W | Hotter, lighter, -0.8 pp | | [Resun Solar RS8I-M FULL BLACK 550W](https://comparepv.com/panel/resun-solar-rs8i-m-full-black-550w) | 550 W | Hotter, lighter, -0.6 pp | | [Resun Solar RS8I-M HC-555](https://comparepv.com/panel/resun-solar-rs8i-m-hc-555) | 555 W | Hotter, lighter, -0.4 pp | | [Resun Solar RS8I-555M-F30](https://comparepv.com/panel/resun-solar-rs8i-555m-f30) | 555 W | Hotter, lighter, -0.4 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +85 W, lighter, +3.3 pp | --- Source: https://comparepv.com/panel/resun-solar-rs8i-m-dg-565 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.