--- title: "Resun Solar RS7E-210M 210W Solar Panel - Specs & Review | ComparePV" description: "Resun Solar RS7E-210M 210W solar panel. Specs: 19.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/resun-solar-rs7e-210m" updated: 2026-09-11 --- # Resun Solar RS7E-210M Space saver, weak in heat 553 panels in the 110-310 W band, all technologies ## Identity - **Manufacturer:** Resun Solar - **Model:** RS7E-210M - **Series:** RS7E-210M - **Rated power:** 210 W - **Cell technology:** Monocrystalline ## How it compares Compared against 110-310 W band, all technologies (553 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 210 W | 235 W | Typical | | | Module efficiency | 19.20% | 16.64% | Strong - top 15% | 12,855 | | Power density | 192.3 | 166.1 | Strong - top 13% | 12,827 | | Temperature coefficient | -0.390 | -0.370 | Weak - bottom 24% | 13,579 | | Weight (kg) | 12.0 kg | 15.5 kg | Strong - top 16% | | | Performance warranty | 30 yrs | 25 yrs | Strong - top 18% | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 19.20% | 16.64% | Strong - top 15% | 12,855 | | Power density | 192.3 | 166.1 | Strong - top 13% | 12,827 | | Temperature coefficient | -0.390 | -0.370 | Weak - bottom 24% | 13,579 | | Weight per kWp | 57.1 | 67.9 | Strong - top 16% | 11,083 | | Performance warranty | 30 yrs | 25 yrs | Strong - top 18% | 21 | ### Strengths - **192.3 watts per square metre** - Top 13% of the 110-310 W band, against a median of 166.1. - **19.20% module efficiency** - Top 15% of the 110-310 W band, against a median of 16.64%. - **57.1 kg per kWp** - Top 16% of the 110-310 W band, against a median of 67.9. ### Watch out for - **-0.390 %/°C temperature coefficient** - Bottom 24% of the 110-310 W band, against a median of -0.370. - **Best for:** Residential. - **Not ideal for:** Hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 210 W - **Efficiency:** 19.20 % - **Voltage at Pmax (Vmp):** 20.05 V - **Current at Pmax (Imp):** 10.48 A - **Open-circuit voltage (Voc):** 23.95 V - **Short-circuit current (Isc):** 11.07 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:** Monocrystalline - **Cell count:** 36 ### Physical - **Length:** 1560 mm - **Width:** 700 mm - **Thickness:** 30 mm - **Weight:** 12.0 kg - **Area:** 1.09 m2 - **Power density:** 192.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Annual degradation:** 0.50 % - **Output after 30 years:** 177 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 12855 of 14005 | | Power density | 12827 of 14005 | | Temperature coefficient | 13579 of 14005 | | Weight | 11083 of 14005 | | Warranty | 21 of 14005 | ## About this series The RS7E-210M series consists of compact monocrystalline modules built for installations where reliability matters more than squeezing maximum output per square meter - off-grid systems, solar water pumping, rural electrification, and small residential setups. The panel is built from 36 cells measuring 166x166 mm in a **9BB multi-busbar** configuration, which reduces internal power loss and noticeably lowers the risk of microcracks and broken current paths - a common failure point in cheaper panels. Thanks to high-transmittance tempered glass with an anti-reflective coating, the module maintains solid **low-light performance**, valued by users running systems through mornings, evenings, and overcast days. The construction has been validated for harsh operating conditions - **resistance to salt mist and ammonia exposure** makes the panel well suited to coastal regions, agricultural sites, and industrial zones, while its certified wind and snow load capacity keeps it stable under extreme weather. Strong **anti-PID resistance** limits power degradation over time, translating into steadier energy yield and a lower LCOE across the system's lifespan. This is a solution for installers looking for a proven, compact panel for specialized applications rather than standard large residential rooftops. ## Notable figures - Module efficiency of 19.2% is 2.6pp below average for \*\*database\*\* panels (median: 21.8%) - At 192.3 W/m², this panel generates 25.8 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 - In the top 92% for efficiency among all N-type panels ## Questions ### What applications is the Resun Solar RS7E-210M panel suited for? The RS7E-210M 210 Wp is a compact monocrystalline module designed for off-grid systems, solar pumps, rural electrification, and small residential installations where reliability matters more than maximum power per square meter. It is not intended for large rooftop arrays but rather for specialized applications requiring a proven, compact design. ### What warranty comes with the RS7E-210M series? Resun Solar offers a 12-year product warranty along with a 30-year power output warranty. This means the module is expected to maintain its guaranteed generation level for three decades, while any material or manufacturing defects during the first 12 years are covered under manufacturer responsibility. ### What is multi-busbar 9BB technology in the RS7E-210M and is it worth it? 9BB refers to a nine-busbar configuration on each of the 36 cells (166x166 mm), which collect current from the cell into the panel circuit. More busbars mean shorter current paths, lower resistive losses, and reduced risk of microcracks and broken current paths - a common failure cause in cheaper panels. This provides a real durability advantage, especially during transport and installation in rough terrain. ### Is the RS7E-210M suitable for coastal or agricultural environments? Yes, the RS7E-210M has been verified for resistance to salt mist and ammonia corrosion, making it suitable for coastal installations, farms, and industrial zones where standard panels may corrode or degrade faster. It also withstands high wind and snow loads, performing reliably under extreme weather conditions. ### Does the RS7E-210M perform well in low-light conditions, such as mornings or cloudy days? Yes, thanks to its tempered glass with high light transmittance and anti-reflective coating, the module maintains good performance even at low sun angles and in diffuse light. Users running morning, evening, or frequently overcast installations value this as an advantage over cheaper panels lacking similar coatings. ### What is PID resistance in the RS7E-210M and why does it matter? PID (Potential Induced Degradation) is a phenomenon where voltage differences within a system cause a gradual loss of module power output over time, reducing efficiency in unprotected panels. The RS7E-210M's high PID resistance limits this degradation, resulting in a more stable energy yield throughout the system's lifetime and lower LCOE over the installation's service life. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/RS7E210M-2b2c1e823506.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Gamko New Energy GKA182M160W](https://comparepv.com/panel/gamko-new-energy-gka182m160w) | 160 W | -50 W, lighter, +3.8 pp | | [Gamko New Energy GKA182M180W](https://comparepv.com/panel/gamko-new-energy-gka182m180w) | 180 W | -30 W, lighter, +3.8 pp | | [Gamko New Energy GKA182M200W](https://comparepv.com/panel/gamko-new-energy-gka182m200w) | 200 W | -10 W, lighter, +3.8 pp | | [Gamko New Energy GKA182M240W](https://comparepv.com/panel/gamko-new-energy-gka182m240w) | 240 W | +30 W, lighter, +3.8 pp | | [Gamko New Energy GKA182M260W](https://comparepv.com/panel/gamko-new-energy-gka182m260w) | 260 W | +50 W, lighter, +3.8 pp | | [JA Solar NS-220MH-80](https://comparepv.com/panel/ja-solar-ns-220mh-80) | 220 W | Cooler, +2.9 pp, -5 yr warranty | | [PolyCrown Solar Tech NS-220MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-220mh-80) | 220 W | Cooler, +2.9 pp, -5 yr warranty | | [DMEGC DM260M10T-B32HBT](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-dm260m10t-b32hbt) | 260 W | +50 W, cooler, +2.8 pp | | [DMEGC DM255M10T-B32HBT](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-dm255m10t-b32hbt) | 255 W | +45 W, cooler, +2.4 pp | | [Isola New Energy YH250W-16M](https://comparepv.com/panel/isola-new-energy-yh250w-16m) | 250 W | +40 W, cooler, +2.0 pp | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | +70 W, cooler, +4.1 pp | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | +75 W, lighter, +3.8 pp | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | +60 W, lighter, +3.8 pp | | [DMEGC DM270M10T-B32HBT](https://comparepv.com/panel/hengdian-group-dmegc-magnetics-co-ltd-dmegc-solar-dm270m10t-b32hbt) | 270 W | +60 W, cooler, +3.7 pp | | [Heckert Solar ZEUS 1.2 FullBlack 275W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-275w) | 275 W | +65 W, cooler, +3.7 pp | | [Heckert Solar ZEUS 1.2 FullBlack 270W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-270w) | 270 W | +60 W, cooler, +3.3 pp | --- Source: https://comparepv.com/panel/resun-solar-rs7e-210m Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.