--- title: "Resun Solar RS7E-185P Solar Panel: Specs & Datasheet | ComparePV" description: "Resun Solar RS7E-185P solar panel. Specs: 16.94% efficiency, Polycrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs7e-185p" image: "https://comparepv.com/og/panel/resun-solar-rs7e-185p.png" updated: 2026-10-23 --- # Resun Solar RS7E-185P Warranty pick, no clear weak spot 488 panels in the 85-285 W band, all technologies ## Identity - **Manufacturer:** Resun Solar - **Model:** RS7E-185P - **Series:** RS7E-P - **Rated power:** 185 W - **Cell technology:** Polycrystalline ## How it compares Compared against 85-285 W band, all technologies (488 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 185 W | 200 W | Typical | | | Module efficiency | 16.94% | 16.50% | Typical | 13,583 | | Power density | 169.4 | 165.5 | Typical | 13,572 | | Temperature coefficient | -0.390 | -0.370 | Typical | 13,659 | | Weight (kg) | 12.0 kg | 13.0 kg | Typical | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 18% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 16.94% | 16.50% | Typical | 13,583 | | Power density | 169.4 | 165.5 | Typical | 13,572 | | Temperature coefficient | -0.390 | -0.370 | Typical | 13,659 | | Weight per kWp | 64.9 | 68.0 | Typical | 13,136 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 18% | 21 | ### Strengths - **30 year performance warranty** - Top 18% of the 85-285 W band, against a median of 25 yrs. - **Best for:** Residential and commercial. ## Specification ### Electrical - **Rated power (Pmax):** 185 W - **Efficiency:** 16.94 % - **Voltage at Pmax (Vmp):** 18.27 V - **Current at Pmax (Imp):** 10.13 A - **Open-circuit voltage (Voc):** 22.52 V - **Short-circuit current (Isc):** 10.69 A - **Max system voltage:** 1000 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:** 36 ### Physical - **Length:** 1560 mm - **Width:** 700 mm - **Thickness:** 35 mm - **Weight:** 12.0 kg - **Area:** 1.09 m2 - **Power density:** 169.4 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 156 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 13583 of 14129 | | Power density | 13572 of 14129 | | Temperature coefficient | 13659 of 14129 | | Weight | 13136 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Multi-busbar 9BB technology** - Nine busbars spread current across more current paths than classic 3BB/5BB cells, limiting power loss from cell micro-cracks and reducing the risk of significant generation drop if a single busbar is damaged. - **High efficiency for a poly module** - Efficiency up to 18.77% is well above typical polycrystalline levels (usually 16-17%) and exceeds the comparable TPL Solar TPL S-72 module (16.06% at the same 205 Wp power). - **30-year linear power warranty** - The 30-year linear power warranty exceeds the standard 25 years offered by most Tier-1 manufacturers, lowering the effective levelized cost of energy (LCOE) over the module's lifetime. - **PID and environmental corrosion resistance** - Certified resistance to PID degradation, salt mist, and ammonia allows the module to be used in coastal and agricultural installations without accelerated power loss. - **Compact format for small installations** - The small module dimensions ease mounting on limited roof area and suit hybrid systems and smaller commercial projects where standard large-format panels don't fit. ## Cons - **Discontinued production** - The RS7E-P series is no longer manufactured, meaning limited availability of replacement modules for extending existing installations and potential difficulties with long-term warranty service. - **Lower efficiency vs. monocrystalline peers** - Despite a strong result for a poly module, max efficiency of 18.77% trails monocrystalline modules in the same power class, e.g. MY Solar M3 and JA Solar M3 (205 Wp at 20.1% efficiency) - a gap of about 1.3 percentage points. - **Low unit power range** - Power of 185-205 Wp is typical of an older compact module format, requiring more panels and longer cabling runs to reach a target system power compared to newer high-wattage half-cut modules. ## About this series The RS7E-P series consists of compact polycrystalline modules built with 166 mm cells and **multi-busbar 9BB** technology, designed for installations where a smaller module footprint matters without sacrificing conversion efficiency. The nine-busbar layout reduces internal power loss and distributes current across more pathways, meaningfully lowering the risk of generation losses from cell microcracks or a broken busbar - an issue that can noticeably hurt output in older 3BB or 5BB modules. These panels stand out for their **resistance to PID degradation**, keeping power output stable throughout the module's service life and helping bring down the effective levelized cost of energy (LCOE). High-transmittance, anti-reflective tempered glass delivers **strong performance in low-light conditions**, a benefit installers will appreciate in regions with variable cloud cover. The certified construction withstands extreme wind and snow loads as well as salt mist and ammonia exposure, making it well suited for coastal and agricultural environments. Thanks to its small footprint, the RS7E-P series fits well in installations with limited mounting area, hybrid systems, and smaller commercial projects where **reliability and a predictable linear power warranty** are the priority. ## Notable figures - At 16.9% efficiency, this panel is 4.9pp below the \*\*database\*\* median of 21.8% - At 169.4 W/m², this panel generates 48.7 W/m² less per unit area than \*\*database\*\* median (218.1 W/m²) - -0.39%/°C temperature coefficient - 0.09pp worse than \*\*database\*\* median (-0.30%/°C), expect higher hot weather losses - Weight of 12.0 kg (14.5 kg below \*\*database\*\* median of 26.5 kg) allows easier transport and roof mounting - #13583 for efficiency, #13659 for temperature performance out of 14129 panels ## Questions ### Is the Resun Solar RS7E-P series still available for purchase? No, the RS7E-P series has been discontinued by Resun Solar. These modules may still be found in limited leftover stock through distributors or as clearance inventory. For expanding an existing array, check availability with local suppliers; for new projects, consider the manufacturer's current series with comparable specifications. ### What warranty does the RS7E-P series come with and what does it cover? Resun Solar provides a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty. This means the module's power output degrades predictably and gradually over its lifetime, allowing installers to accurately forecast long-term energy production from the design stage. ### What does multi-busbar 9BB technology mean in the RS7E-P panels, and is it actually worth it? 9BB technology means nine busbars (current-carrying paths) per cell, compared to the standard 3BB or 5BB designs. More busbars distribute the electrical load across more paths, so a cell microcrack or a damaged busbar doesn't cause a drastic drop in the whole string's output. This meaningfully improves long-term durability and output stability. ### Are the 205 Wp RS7E-P panels suitable for small installations with limited mounting space? Yes, the 205 Wp power output combined with compact 166 mm cells makes the RS7E-P series well suited for installations with limited roof or mounting area, hybrid systems, and smaller commercial projects. The module's small footprint also simplifies transport and installation in tight spaces, such as sloped roofs or small carports. ### Are RS7E-P modules resistant to PID degradation, and what does that mean in practice? Yes, RS7E-P panels have confirmed PID (potential induced degradation) resistance, a failure mode caused by voltage differences within the module. This keeps power output stable throughout the module's service life, directly lowering the levelized cost of energy (LCOE) and reducing the risk of unexpected output drops after a few years of operation. ### Are RS7E-P panels suitable for coastal or agricultural installations? Yes, the RS7E-P construction is certified for resistance to salt mist and ammonia, making it suitable for coastal applications and agricultural settings, such as near livestock facilities. The panels are also certified to withstand extreme wind and snow loads, as confirmed by the manufacturer's certification testing. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS7E-P_POLY_9BB_185-205W-2e644433e096.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Resun Solar RS7E-205P](https://comparepv.com/panel/resun-solar-rs7e-205p) | 205 W | +20 W, +1.8 pp | | [Resun Solar RS7E-200P](https://comparepv.com/panel/resun-solar-rs7e-200p) | 200 W | +15 W, +1.4 pp | | [Resun Solar RS7E-195P](https://comparepv.com/panel/resun-solar-rs7e-195p) | 195 W | +10 W, +0.9 pp | | [JA Solar MYP3036-180](https://comparepv.com/panel/ja-solar-myp3036-180) | 180 W | Cooler, +0.7 pp, -5 yr warranty | | [MY Solar MYP3036-180](https://comparepv.com/panel/my-solar-myp3036-180) | 180 W | Cooler, +0.7 pp, -5 yr warranty | | [JA Solar MYP3048-235](https://comparepv.com/panel/ja-solar-myp3048-235) | 235 W | +50 W, +0.6 pp, -5 yr warranty | | [MY Solar MYP3048-235](https://comparepv.com/panel/my-solar-myp3048-235) | 235 W | +50 W, heavier, -5 yr warranty | | [Resun Solar RS7E-190P](https://comparepv.com/panel/resun-solar-rs7e-190p) | 190 W | +0.5 pp | | [JA Solar MYP3048-230](https://comparepv.com/panel/ja-solar-myp3048-230) | 230 W | +45 W, cooler, -5 yr warranty | | [JA Solar MYP3036-175](https://comparepv.com/panel/ja-solar-myp3036-175) | 175 W | Cooler, +0.2 pp, -5 yr warranty | | [Resun Solar RS7E-210M](https://comparepv.com/panel/resun-solar-rs7e-210m) | 210 W | +25 W, +2.3 pp | | [Resun Solar RS7E-215M](https://comparepv.com/panel/resun-solar-rs7e-215m) | 215 W | +30 W, +2.8 pp | | [Resun Solar RS7E-220M](https://comparepv.com/panel/resun-solar-rs7e-220m) | 220 W | +35 W, +3.2 pp | | [Resun Solar RS7E-225M](https://comparepv.com/panel/resun-solar-rs7e-225m) | 225 W | +40 W, +3.7 pp | | [Resun Solar RS7E-230M](https://comparepv.com/panel/resun-solar-rs7e-230m) | 230 W | +45 W, +4.1 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | +95 W, cooler, +6.4 pp | --- Source: https://comparepv.com/panel/resun-solar-rs7e-185p Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.