--- title: "Resun Solar RS8I-M FULL BLACK 550W 550W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS8I-M FULL BLACK 550W 550W solar panel. Specs: 21.28% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs8i-m-full-black-550w" updated: 2026-09-11 --- # Resun Solar RS8I-M FULL BLACK 550W Middle of its segment, weak in heat 7,481 panels in the 450-650 W band, all technologies ## Identity - **Manufacturer:** Resun Solar - **Model:** RS8I-M FULL BLACK 550W - **Series:** RS8I-M FULL BLACK - **Rated power:** 550 W - **Cell technology:** Monocrystalline ## How it compares Compared against 450-650 W band, all technologies (7481 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 550 W | 550 W | Typical | | | Module efficiency | 21.28% | 22.30% | Weak - bottom 24% | 8,795 | | Power density | 212.8 | 223.0 | Weak - bottom 24% | 8,643 | | Temperature coefficient | -0.390 | -0.292 | Weak - bottom 1% | 13,579 | | Weight (kg) | 28.6 kg | 28.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.28% | 22.30% | Weak - bottom 24% | 8,795 | | Power density | 212.8 | 223.0 | Weak - bottom 24% | 8,643 | | Temperature coefficient | -0.390 | -0.292 | Weak - bottom 1% | 13,579 | | Weight per kWp | 52.0 | 52.7 | Typical | 5,417 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.390 %/°C temperature coefficient** - Bottom 1% of the 450-650 W band, against a median of -0.292. Ranked 13,579th in the whole database. - **21.28% module efficiency** - Bottom 24% of the 450-650 W band, against a median of 22.30%. - **212.8 watts per square metre** - Bottom 24% of the 450-650 W band, against a median of 223.0. - **Best for:** Residential, BIPV and shaded-installations. - **Not ideal for:** Hot climates, tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 550 W - **Efficiency:** 21.28 % - **Voltage at Pmax (Vmp):** 41.96 V - **Current at Pmax (Imp):** 13.11 A - **Open-circuit voltage (Voc):** 49.90 V - **Short-circuit current (Isc):** 14.00 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.390 %/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:** 144 ### Physical - **Length:** 2279 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 28.6 kg - **Area:** 2.58 m2 - **Power density:** 212.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 465 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8795 of 14005 | | Power density | 8643 of 14005 | | Temperature coefficient | 13579 of 14005 | | Weight | 5417 of 14005 | | Warranty | 21 of 14005 | ## About this series The RS8I-M FULL BLACK series is designed for anyone who expects a solar module to deliver not just performance but also an aesthetic that fits modern roof architecture. The panels use **Half-Cut technology** combined with PERC cells, allowing the module to maintain stable operation even under partial shading and reducing the risk of hot-spot formation. The **multi-busbar cell structure** lowers internal power losses and improves conversion efficiency, translating into real annual energy gains. Everything is enclosed in an **elegant, uniformly black frame** that eliminates the contrasting elements seen on classic panels - a solution frequently chosen for pitched-roof residential installations where the visual appearance of the system matters. The module's construction ensures **high resistance to snow and wind loads**, and the panels also withstand salt mist and ammonia exposure, making them a versatile choice for urban, rural, and coastal installations alike. The RS8I-M FULL BLACK is well suited for projects where mounting space is limited and the investor wants to maximize energy yield from every square meter of roof. ## Notable figures - Module efficiency of 21.3% is 0.5pp below average for \*\*database\*\* panels (median: 21.8%) - Power density of 212.8 W/m² is 5.3 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - -0.39%/°C temperature coefficient - 0.09pp worse than \*\*database\*\* median (-0.30%/°C), expect higher hot weather losses - Weight of 28.6 kg is 2.1 kg above \*\*database\*\* median (26.5 kg) - verify structural support - #8795 for efficiency, #13579 for temperature performance out of 14005 panels ## Questions ### Is the RS8I-M FULL BLACK series still available for purchase? No, production of the RS8I-M FULL BLACK series has ended and the model has been discontinued by the manufacturer. Units may still be available through distributors as remaining stock, but for larger installations or system expansions it is worth checking availability with your supplier first, since inventory levels vary by region. ### What warranty comes with Resun Solar RS8I-M FULL BLACK panels? The manufacturer provides a 12-year product warranty along with a 30-year linear power output warranty. This means the panel is expected to retain a guaranteed percentage of its original power output throughout its service life, while material or manufacturing defects during the first 12 years are covered by direct service support. ### Are RS8I-M FULL BLACK panels suitable for a sloped roof on a single-family home? Yes, this is one of the series' primary applications. The uniform black frame without contrasting elements gives the installation a clean look that blends with dark roofing, making it especially popular for sloped roofs on residential buildings. The panel's structure also offers high resistance to snow and wind loads, adding safety on typical roof frames. ### How does Half-Cut technology in the RS8I-M differ from panels with full-size cells? Half-Cut technology involves cutting standard cells in half, which reduces current losses and improves module efficiency, particularly under partial shading such as from a chimney or antenna. Combined with PERC cells and a multi-busbar structure, the RS8I-M reduces the risk of hot spots and maintains more stable performance than modules with full-size cells. ### What is the maximum power output of the RS8I-M FULL BLACK, and how many panels are needed for a typical 5 kWp system? This series reaches a maximum power output of up to 560 Wp. At that output, building a roughly 5 kWp system requires approximately 9 modules, making the series an efficient choice where roof space is limited and maximizing energy yield per square meter of roof is a priority. ### Are RS8I-M FULL BLACK panels suitable for coastal or agricultural installations? Yes, the modules are resistant to salt mist and ammonia exposure, making them a safe choice both for coastal areas prone to salt corrosion and for farm sites where ammonia compounds from barns or stables may be present in the air. This versatility makes the panels suitable for urban, rural, and coastal installations alike. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS8I-M-FULL-BLACK-535-560W-min-fce74bec2282.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.7 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.4 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.3 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +3.2 pp | | [Resun Solar RS8I-M HC-535](https://comparepv.com/panel/resun-solar-rs8i-m-hc-535) | 535 W | -15 W, cooler, -0.6 pp | | [Resun Solar RS8I-540M-BD](https://comparepv.com/panel/resun-solar-rs8i-540m-bd) | 540 W | -10 W, -0.3 pp | | [Resun Solar RS8I-M HC-540](https://comparepv.com/panel/resun-solar-rs8i-m-hc-540) | 540 W | -10 W, cooler, -0.4 pp | | [Resun Solar RS8I-545M-BD](https://comparepv.com/panel/resun-solar-rs8i-545m-bd) | 545 W | Very close match | | [Resun Solar RS8I-M HC-545](https://comparepv.com/panel/resun-solar-rs8i-m-hc-545) | 545 W | Cooler | | [Resun Solar RS8I-M HC-555](https://comparepv.com/panel/resun-solar-rs8i-m-hc-555) | 555 W | Cooler | | [Resun Solar RS8I-555M-F30](https://comparepv.com/panel/resun-solar-rs8i-555m-f30) | 555 W | Lighter, +0.2 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +100 W, cooler, +3.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +95 W, cooler, +3.7 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +90 W, cooler, +3.5 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +85 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/resun-solar-rs8i-m-full-black-550w Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.