--- title: "Resun Solar RS6I-370P Solar Panel: Specs & Datasheet | ComparePV" description: "Resun Solar RS6I-370P solar panel. Specs: 18.39% efficiency, Polycrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs6i-370p" image: "https://comparepv.com/og/panel/resun-solar-rs6i-370p.png" updated: 2026-10-23 --- # Resun Solar RS6I-370P Middle of its segment, weak in heat 5,748 panels in the 270-470 W band, all technologies ## Identity - **Manufacturer:** Resun Solar - **Model:** RS6I-370P - **Series:** RS6I-P - **Rated power:** 370 W - **Cell technology:** Polycrystalline ## How it compares Compared against 270-470 W band, all technologies (5748 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 370 W | 425 W | Weak - bottom 17% | | | Module efficiency | 18.39% | 21.03% | Weak - bottom 10% | 13,249 | | Power density | 183.9 | 210.2 | Weak - bottom 10% | 13,216 | | Temperature coefficient | -0.390 | -0.320 | Weak - bottom 4% | 13,659 | | Weight (kg) | 22.5 kg | 22.0 kg | Weak - bottom 17% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 18.39% | 21.03% | Weak - bottom 10% | 13,249 | | Power density | 183.9 | 210.2 | Weak - bottom 10% | 13,216 | | Temperature coefficient | -0.390 | -0.320 | Weak - bottom 4% | 13,659 | | Weight per kWp | 60.8 | 53.7 | Weak - bottom 17% | 12,632 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.390 %/°C temperature coefficient** - Bottom 4% of the 270-470 W band, against a median of -0.320. Ranked 13,659th in the whole database. - **18.39% module efficiency** - Bottom 10% of the 270-470 W band, against a median of 21.03%. Ranked 13,249th in the whole database. - **183.9 watts per square metre** - Bottom 10% of the 270-470 W band, against a median of 210.2. - **Best for:** Residential, commercial 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):** 370 W - **Efficiency:** 18.39 % - **Voltage at Pmax (Vmp):** 39.74 V - **Current at Pmax (Imp):** 9.31 A - **Open-circuit voltage (Voc):** 48.06 V - **Short-circuit current (Isc):** 9.82 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:** Polycrystalline - **Cell count:** 144 ### Physical - **Length:** 2008 mm - **Width:** 1002 mm - **Thickness:** 35 mm - **Weight:** 22.5 kg - **Area:** 2.01 m2 - **Power density:** 183.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 313 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 13249 of 14129 | | Power density | 13216 of 14129 | | Temperature coefficient | 13659 of 14129 | | Weight | 12632 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Half-cell technology with 5 busbars** - Half-cut cells with 5 busbars reduce resistive losses and microcrack risk, improving long-term module reliability compared to older full-cell designs. - **High hot-spot and PID resistance** - Splitting cells in half significantly limits hot-spot effects under partial shading (e.g., from trees or chimneys), while strong PID degradation resistance ensures stable energy yield and lower LCOE over the installation's lifetime. - **30-year power warranty** - The manufacturer offers a 30-year linear power warranty, matching current market standards for mass-segment modules and exceeding the typical 25-year warranties of older-generation PERC panels. - **Durable build and AR coating** - High-transmittance tempered glass with an anti-reflective coating improves energy yield under low irradiance, while the anodized aluminum frame ensures mechanical resistance to wind and snow loads, making the series suitable for harsh environments (salt mist, ammonia exposure). - **Established manufacturer (since 2007)** - Resun Solar has operated since 2007, giving some manufacturing and operational track record relevant to a panel with a 30-year power warranty, though without confirmed BNEF Tier-1 status as of today. ## Cons - **Discontinued production** - The RS6I-P series has been discontinued, meaning limited availability of warranty service, replacement parts, and difficulty sourcing identical modules for future system expansion. - **Lower efficiency than peers** - Efficiency of 17.15-18.39% is clearly below peer comparables such as Solitek SOLID Bifacial (19.57%), Solarwatt Panel vision GM 3.0 (19.9%), and Selfa SV120M.3.2 (20.3%) at the same max power of 370 Wp - a 1.5-2 percentage-point gap due to the older polycrystalline cell technology. - **Poly technology, not mono/bifacial** - Unlike newer competitors (Solitek, Selfa, Solarwatt) that use mono cells and often bifacial technology, RS6I-P retains classic polycrystalline, monofacial cells - requiring more mounting area per unit of power at equal wattage. - **12-year product warranty below current standards** - The 12-year product warranty is shorter than current tier-1 market standards (often 15-25 years), which can be relevant when assessing total cost of ownership over the system's 30-year power warranty horizon. ## About this series The RS6I-P series consists of polycrystalline solar modules built with **half-cell** technology, splitting cells in half to reduce resistive power losses and boost overall panel efficiency. The use of **5 busbar** cells lowers the risk of failures caused by micro-cracks and broken current paths, delivering stronger long-term reliability across the module's service life. Thanks to the half-cell layout, the panel also offers significantly greater **resistance to the hot-spot effect** triggered by partial shading, a key advantage for installations exposed to shadows from trees, chimneys, or nearby buildings. The modules feature robust **PID resistance**, keeping output stable and reducing LCOE over the system's lifetime. High-transmittance tempered glass with an anti-reflective coating improves energy harvest under low-light conditions, while the anodized aluminum frame ensures mechanical strength against high wind and snow loads. This series fits both rooftop and ground-mounted installations, particularly where durability, consistent energy yield, and resistance to demanding environmental conditions, including salt mist and ammonia exposure, are top priorities. ## Notable figures - Efficiency of 18.4% is 3.4pp below the \*\*database\*\* median (21.8%) - 183.9 W/m² power density is 34.2 W/m² below \*\*database\*\* median (218.1 W/m²) - requires larger installation area - -0.39%/°C temperature coefficient - 0.09pp worse than \*\*database\*\* median (-0.30%/°C), expect higher hot weather losses - Weight of 22.5 kg (4.0 kg below \*\*database\*\* median of 26.5 kg) allows easier transport and roof mounting - #13249 for efficiency, #13659 for temperature performance out of 14129 panels ## Questions ### Is the Resun Solar RS6I-P series still available for purchase? The RS6I-P series has been discontinued by Resun Solar and replaced by newer models with higher power output and efficiency. Panels from this series may still be available from distributors clearing remaining stock, so it is worth checking current availability and asking about production date and warranty terms for modules from the final production batch. ### What is the maximum power output of the RS6I-P panel and what installations is it suited for? Panels in the RS6I-P series reach a maximum power output of up to 370 Wp. This is a typical value for mid-range polycrystalline modules, suitable for residential rooftop installations and smaller ground-mount systems where stable, predictable energy production is the priority rather than maximum power density per square meter. ### How does half-cell technology in the RS6I-P differ from standard full-cell panels? Half-cell technology uses cells cut in half, reducing power losses from conductor heating and lowering the module's series resistance. This makes the panel operate more efficiently, especially under partial shading, and makes it less prone to the hot-spot effect compared to panels using full-size cells. ### What warranty does the RS6I-P series come with and what does it cover? Resun Solar provides a 12-year product warranty and a 30-year power output warranty for the RS6I-P series. The product warranty covers material and workmanship defects, while the power warranty guarantees the panel will maintain its declared energy output level throughout the system's operational lifetime. ### Are RS6I-P panels resistant to shading and the hot-spot effect? Yes, splitting the cells in half using half-cell technology significantly increases resistance to the hot-spot effect caused by partial shading, for example from trees, chimneys, or neighboring buildings. This makes RS6I-P panels better suited to locations where part of the module surface is periodically shaded. ### Is the RS6I-P a bifacial panel, and is it suitable for harsh environments like coastal areas? No, the RS6I-P series uses a monofacial design rather than bifacial, so it generates energy only from the front surface of the module. Thanks to strong PID resistance and an anti-reflective coating on tempered glass, the panels handle harsh environmental conditions well, including salt mist and ammonia vapor, making them suitable for installations near coastlines or agricultural areas. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS6I-P_HC_345-370W-29ee6a7283b5.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [SunLink LNSU-410M](https://comparepv.com/panel/sunlink-lnsu-410m) | 410 W | +40 W, +1.9 pp, -5 yr warranty | | [SunLink LNSK-340M](https://comparepv.com/panel/sunlink-lnsk-340m) | 340 W | Cooler, +1.7 pp, -5 yr warranty | | [SunLink LNSU-405M](https://comparepv.com/panel/sunlink-lnsu-405m) | 405 W | +35 W, +1.7 pp, -5 yr warranty | | [Canadian Solar CS3K-330P](https://comparepv.com/panel/canadian-solar-cs3k-330p) | 330 W | -40 W, +1.5 pp, -5 yr warranty | | [Canadian Solar CS3K-335MB-AG](https://comparepv.com/panel/canadian-solar-cs3k-335mb-ag) | 335 W | -35 W, cooler, +1.5 pp | | [Canadian Solar CS3U-395P](https://comparepv.com/panel/canadian-solar-cs3u-395p) | 395 W | Cooler, +1.5 pp, -5 yr warranty | | [SunLink LNSU-400M](https://comparepv.com/panel/sunlink-lnsu-400m) | 400 W | Cooler, +1.4 pp, -5 yr warranty | | [SunLink LNSK-335M](https://comparepv.com/panel/sunlink-lnsk-335m) | 335 W | -35 W, +1.4 pp, -5 yr warranty | | [Resun Solar RS6I-345P](https://comparepv.com/panel/resun-solar-rs6i-345p) | 345 W | -25 W, -1.2 pp | | [Resun Solar RS6I-350P](https://comparepv.com/panel/resun-solar-rs6i-350p) | 350 W | -20 W, -1.0 pp | | [Resun Solar RS6I-355P](https://comparepv.com/panel/resun-solar-rs6i-355p) | 355 W | -15 W, -0.8 pp | | [Resun Solar RS6I-360P](https://comparepv.com/panel/resun-solar-rs6i-360p) | 360 W | -10 W, -0.5 pp | | [Resun Solar RS6I-365P](https://comparepv.com/panel/resun-solar-rs6i-365p) | 365 W | -0.2 pp | | [Resun Solar RS6I-390M](https://comparepv.com/panel/resun-solar-rs6i-390m) | 390 W | +20 W, cooler, +1.0 pp | | [Resun Solar RS6I-395M](https://comparepv.com/panel/resun-solar-rs6i-395m) | 395 W | +25 W, cooler, +1.2 pp | | [Resun Solar RS6I-400M](https://comparepv.com/panel/resun-solar-rs6i-400m) | 400 W | +30 W, cooler, +1.5 pp | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +105 W, cooler, +5.6 pp | --- Source: https://comparepv.com/panel/resun-solar-rs6i-370p Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.