--- title: "Techwise Solar TW-280MM-1 280W Solar Panel - Specs & Review | ComparePV" description: "Techwise Solar TW-280MM-1 280W solar panel. Specs: 21.12% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/techwise-solar-tw-280mm-1" updated: 2026-09-11 --- # Techwise Solar TW-280MM-1 Light for its output, short guarantee 1,302 panels in the 180-380 W band, all technologies ## Identity - **Manufacturer:** Techwise Solar - **Model:** TW-280MM-1 - **Series:** Micro Sun Series - **Rated power:** 280 W - **Cell technology:** Monocrystalline ## How it compares Compared against 180-380 W band, all technologies (1302 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 280 W | 330 W | Weak - bottom 22% | | | Module efficiency | 21.12% | 18.70% | Strong - top 4% | 9,255 | | Power density | 211.2 | 186.1 | Strong - top 3% | 9,254 | | Temperature coefficient | -0.400 | -0.360 | Weak - bottom 15% | 13,674 | | Weight (kg) | 12.5 kg | 19.5 kg | Strong - top 1% | | | Performance warranty | 20 yrs | 25 yrs | Weak - bottom 2% | 13,796 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.12% | 18.70% | Strong - top 4% | 9,255 | | Power density | 211.2 | 186.1 | Strong - top 3% | 9,254 | | Temperature coefficient | -0.400 | -0.360 | Weak - bottom 15% | 13,674 | | Weight per kWp | 44.6 | 62.3 | Strong - top 1% | 498 | | Performance warranty | 20 yrs | 25 yrs | Weak - bottom 2% | 13,796 | ### Strengths - **44.6 kg per kWp** - Top 1% of the 180-380 W band, against a median of 62.3. Ranked 498th in the whole database. - **211.2 watts per square metre** - Top 3% of the 180-380 W band, against a median of 186.1. Ranked 9,254th in the whole database. - **21.12% module efficiency** - Top 4% of the 180-380 W band, against a median of 18.70%. Ranked 9,255th in the whole database. ### Watch out for - **20 year performance warranty** - Bottom 2% of the 180-380 W band, against a median of 25 yrs. Ranked 13,796th in the whole database. - **-0.400 %/°C temperature coefficient** - Bottom 15% of the 180-380 W band, against a median of -0.360. - **Best for:** Off-grid and shaded-installations. - **Not ideal for:** Owners who want a long output guarantee and hot climates. ## Specification ### Electrical - **Rated power (Pmax):** 280 W - **Efficiency:** 21.12 % - **Voltage at Pmax (Vmp):** 18.30 V - **Current at Pmax (Imp):** 15.30 A - **Open-circuit voltage (Voc):** 22.05 V - **Short-circuit current (Isc):** 18.43 A - **Max system voltage:** 1000 V ### Temperature - **Temperature coefficient of Pmax:** -0.400 %/degC - **Temperature coefficient of Voc:** -0.300 %/degC - **Temperature coefficient of Isc:** 0.060 %/degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 72 ### Physical - **Length:** 1722 mm - **Width:** 770 mm - **Thickness:** 30 mm - **Weight:** 12.5 kg - **Area:** 1.33 m2 - **Power density:** 211.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 10 years - **Performance warranty:** 20 years ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9255 of 14005 | | Power density | 9254 of 14005 | | Temperature coefficient | 13674 of 14005 | | Weight | 498 of 14005 | | Warranty | 13796 of 14005 | ## About this series The Techwise Solar Micro Sun Series is designed for installations where compact size and flexible power selection are key - from small panels for mobile applications to larger modules for lightweight structures. It features **monocrystalline** cells in configurations suitable for various formats, making it easy to install on campers, boats, patios, in off-grid systems, and as backup power. A key feature is **a wide range of sizes**, as well as a design focused on practical durability in everyday use. The modules utilize **single glass**, and in some variants, you'll find **half-cell architecture**, which helps to minimize losses in partially shaded conditions and stabilize performance in less ideal environments. The Micro Sun Series solves the problem of limited space and difficult mounting surfaces, providing predictable performance in small systems and easy scalability. It's a good choice for users who need panels for custom, service, and mobile installations - where standard roof-mounted modules are simply too large or impractical. ## Notable figures - Module efficiency of 21.1% is 0.7pp below average for \*\*database\*\* panels (median: 21.8%) - At 211.2 W/m², this panel generates 6.9 W/m² less per unit area than \*\*database\*\* median (218.1 W/m²) - -0.40%/°C temperature coefficient - 0.10pp worse than \*\*database\*\* median (-0.30%/°C), expect higher hot weather losses - At 12.5 kg, this panel is 14.0 kg lighter than \*\*database\*\* median (26.5 kg) - easier handling during installation - In the top 66% for efficiency among all N-type panels ## Questions ### What applications is the Techwise Solar Micro Sun Series suitable for? Micro Sun Series offers a maximum power output of 330 Wp and is designed for applications where compact size and flexible power selection matter - campers, boats, gazebos, off-grid systems, and backup power. The wide range of available sizes makes it possible to fit a module onto irregular surfaces where a standard rooftop panel simply won't fit. ### Does the Micro Sun Series use monocrystalline or polycrystalline cells? Micro Sun Series is built with monocrystalline silicon cells, which deliver higher efficiency and better energy yield on limited mounting surfaces than polycrystalline cells. This matters most in small mobile installations, where every square centimeter of panel area affects the amount of power generated. ### What is half-cell architecture in Micro Sun Series panels, and is it worth choosing? Half-cell architecture splits standard cells in half, reducing current losses and internal resistance within the module. In practice this means better performance under partial shading - for example, when a camper panel is partly shaded by an antenna or air conditioner. Not every Micro Sun Series variant includes this technology, so it's worth checking the datasheet for the specific model. ### What warranty comes with the Techwise Solar Micro Sun Series? The Micro Sun Series is backed by a 10-year product warranty and a 20-year linear power output warranty. This means the manufacturer guarantees a defined efficiency level throughout two decades of use, which is standard coverage for this class of mobile and niche PV products. ### Are Micro Sun Series panels bifacial? No, Micro Sun Series modules are monofacial and use a single-glass construction. This design is lighter and less costly to produce, which suits mobile and temporary applications well, where weight and price matter more than maximizing yield from reflected light. ### Are Micro Sun Series panels suitable for mounting on a camper or boat? Yes, this is one of the series' primary use cases. Compact dimensions, flexible power ratings, and a design built for irregular, smaller surfaces make Micro Sun Series a good fit for camper roofs, boats, or portable off-grid kits, where standard rooftop modules are too large or impractical. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/tw-280mm-1-b61eff68f40a.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar NS-300MH-72](https://comparepv.com/panel/ja-solar-ns-300mh-72) | 300 W | Cooler, +2.2 pp, +5 yr warranty | | [PolyCrown Solar Tech NS-300MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-300mh-72) | 300 W | Cooler, +2.2 pp, +5 yr warranty | | [Heckert Solar ZEUS 1.2 FullBlack 280W](https://comparepv.com/panel/heckert-solar-zeus-1-2-fullblack-280w) | 280 W | Cooler, +2.2 pp, +10 yr warranty | | [JA Solar NS-330MH-80](https://comparepv.com/panel/ja-solar-ns-330mh-80) | 330 W | +50 W, cooler, +2.0 pp | | [PolyCrown Solar Tech NS-330MH-80](https://comparepv.com/panel/polycrown-solar-tech-ns-330mh-80) | 330 W | +50 W, cooler, +2.0 pp | | [Gamko New Energy GKA182M285W](https://comparepv.com/panel/gamko-new-energy-gka182m285w) | 285 W | Lighter, +1.9 pp, +10 yr warranty | | [Gamko New Energy GKA182M240W](https://comparepv.com/panel/gamko-new-energy-gka182m240w) | 240 W | -40 W, +1.9 pp, +10 yr warranty | | [Gamko New Energy GKA182M260W](https://comparepv.com/panel/gamko-new-energy-gka182m260w) | 260 W | -20 W, +1.9 pp, +10 yr warranty | | [Gamko New Energy GKA182M270W](https://comparepv.com/panel/gamko-new-energy-gka182m270w) | 270 W | Lighter, +1.9 pp, +10 yr warranty | | [JA Solar NS-290MH-72](https://comparepv.com/panel/ja-solar-ns-290mh-72) | 290 W | Cooler, +1.4 pp, +5 yr warranty | | [PolyCrown Solar Tech NS-290MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-290mh-72) | 290 W | Cooler, +1.4 pp, +5 yr warranty | | [JA Solar NS-280MH-72](https://comparepv.com/panel/ja-solar-ns-280mh-72) | 280 W | Cooler, +0.6 pp, +5 yr warranty | | [PolyCrown Solar Tech NS-280MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-280mh-72) | 280 W | Cooler, +0.6 pp, +5 yr warranty | | [JA Solar NS-270MH-72](https://comparepv.com/panel/ja-solar-ns-270mh-72) | 270 W | -10 W, cooler, +5 yr warranty | | [PolyCrown Solar Tech NS-270MH-72](https://comparepv.com/panel/polycrown-solar-tech-ns-270mh-72) | 270 W | -10 W, cooler, +5 yr warranty | | [Loom Solar SHARK 275](https://comparepv.com/panel/loom-solar-shark-275) | 275 W | Heavier, -0.5 pp | --- Source: https://comparepv.com/panel/techwise-solar-tw-280mm-1 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.