--- title: "Tongwei TW400MAP-108-H-F Solar Panel: Specs & Datasheet | ComparePV" description: "Tongwei TW400MAP-108-H-F solar panel. Specs: 20.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/tw-solar-tongwei-tw400map-108-h-f" image: "https://comparepv.com/og/panel/tw-solar-tongwei-tw400map-108-h-f.png" updated: 2026-09-11 --- # Tongwei TW400MAP-108-H-F Strong in heat, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Tongwei - **Model:** TW400MAP-108-H-F - **Series:** MBB Half-cell Monofacial Full-black Module (54) TW400~420MAP M10-108-H-F - **Rated power:** 400 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 400 W | 410 W | Weak - bottom 9% | | | Module efficiency | 20.50% | 20.60% | Typical | 11,389 | | Power density | 204.8 | 206.2 | Typical | 11,450 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,846 | | Weight (kg) | 20.5 kg | 22.0 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.50% | 20.60% | Typical | 11,389 | | Power density | 204.8 | 206.2 | Typical | 11,450 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,846 | | Weight per kWp | 51.2 | 53.0 | Typical | 4,665 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,912 | ### Strengths - **-0.340 %/°C temperature coefficient** - Top 24% of the PERC 400-450 W segment, against a median of -0.350. - **Best for:** Residential and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 400 W - **Efficiency:** 20.50 % - **Voltage at Pmax (Vmp):** 30.58 V - **Current at Pmax (Imp):** 13.08 A - **Open-circuit voltage (Voc):** 37.08 V - **Short-circuit current (Isc):** 13.77 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.270 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 108 ### Physical - **Length:** 1722 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 20.5 kg - **Area:** 1.95 m2 - **Power density:** 204.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 328 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 11389 of 14129 | | Power density | 11450 of 14129 | | Temperature coefficient | 8846 of 14129 | | Weight | 4665 of 14129 | | Warranty | 9912 of 14129 | ## About this series The Tongwei TW400-420MAP M10-108-H-F module series is an advanced **Full-black** solution that combines top-tier aesthetics with modern silicon cell technology. Thanks to the use of a **Half-cell (half-cut cells)** design, these panels perform significantly better in partial shading conditions, which is crucial for the complex roofs of single-family homes in Poland. The use of **MBB (Multi Busbar) technology** allows for a significant shortening of the current flow path, which effectively reduces internal resistance and minimizes the risk of harmful micro-cracks in the module structure. This is an ideal choice for investors who do not want to choose between an elegant, completely black appearance and high energy efficiency. The precise M10 wafer format optimizes power density, allowing the installation to take up less space while generating stable yields even on hot days. They are distinguished from the competition by exceptional quality control resulting from the full vertical integration of the production process, which translates into **low LID degradation** and high resistance to extreme mechanical loads such as snow or wind. By choosing these modules, the user gains a **durable and safe system** that maintains its parameters for decades, while serving as a visual decoration for a modern building. All structural components have been designed to maximize the lifespan of the installation while maintaining an excellent price-to-quality ratio. ## Notable figures - At 20.5% efficiency, this panel is on par with typical \*\*PERC 400-450W\*\* modules - Power density of 204.8 W/m² matches the \*\*PERC 400-450W\*\* median - Temperature coefficient of -0.34%/°C matches the \*\*PERC 400-450W\*\* median - Weight of 20.5 kg (1.5 kg below \*\*PERC 400-450W\*\* median of 22.0 kg) allows easier transport and roof mounting - In the top 81% for efficiency among all PERC panels ## Questions ### Is the Tongwei TW400-420MAP M10-108-H-F series still available for purchase? No, this series has been discontinued from Tongwei's current production lineup and replaced by newer TOPCon-based modules with higher efficiency. Panels may still be available from distributors as remaining stock, but once inventory runs out, matching modules for expanding an existing array will no longer be obtainable, so it's best to order the full required capacity upfront. ### What warranty comes with the Tongwei TW400-420MAP panels and what does it cover? The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 25-year linear power output warranty. This means the module is guaranteed to still deliver a specified percentage of its original rated power after 25 years, a standard benchmark among Tier 1 manufacturers like Tongwei. ### Does the half-cell design help with partial roof shading? Yes, half-cut cells reduce power loss when part of the module is shaded by a chimney, antenna, or neighboring building. Current flows through independent paths in the top and bottom halves of the panel, so shading one section doesn't take the entire module offline, which is especially valuable on complex residential roofs in Poland. ### What does MBB (Multi Busbar) technology offer compared to standard 5-busbar panels? MBB increases the number of thin current-carrying paths on the cell, shortening the electron flow distance, lowering internal resistance, and reducing energy losses. It also spreads mechanical stress across more connection points, lowering the risk of microcracks during transport, installation, or snow loading, resulting in higher and more stable panel output. ### Are the TW400-420MAP panels bifacial modules? No, the TW400-420MAP series is a monofacial module built with PERC cell technology, generating power only from its front surface. This design suits typical roof-mounted installations where there's no access to reflected light from the ground, unlike ground-mounted systems where bifacial panels would be the better choice. ### Why is the Full-black finish more expensive, and is it worth the extra cost? The Full-black version uses a black frame and black backsheet instead of the standard white background, giving the array a uniform, sleek look without exposing white gaps between cells. The price premium comes from more expensive components, but it's justified for many buyers, especially on roofs visible from the street, where aesthetics genuinely affect property value. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/datasheet-TW400-420MAP-M10-108-H-F-full-black-en-1-0886c1dc6e5e.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Luxor Solar LX-440M/182-108+GG](https://comparepv.com/panel/luxor-solar-lx-440m-182-108-gg) | 440 W | Cooler, +2.6 pp, +5 yr warranty | | [Just Solar JST-EDMH-(445-465)W-TD (450W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-450w-class) | 450 W | +50 W, +2.6 pp, +5 yr warranty | | [Q-SUN Solar QNN182-HG450-54](https://comparepv.com/panel/qn-solar-pv-limited-qnn182-hg450-54) | 450 W | +50 W, cooler, +2.5 pp | | [Huayao HY440-N108BDD](https://comparepv.com/panel/huayao-hy440-n108bdd) | 450 W | +50 W, +2.5 pp, +5 yr warranty | | [BYD NLBK-27-450](https://comparepv.com/panel/byd-nlbk-27-450) | 450 W | +50 W, +2.5 pp, +5 yr warranty | | [Renesola RS41-450NBG-E3](https://comparepv.com/panel/renesola-rs41-450nbg-e3) | 450 W | +50 W, cooler, +2.5 pp | | [Tongwei TW405MAP-108-H-F](https://comparepv.com/panel/tw-solar-tongwei-tw405map-108-h-f) | 405 W | Very close match | | [Tongwei TW410MAP-108-H-F](https://comparepv.com/panel/tw-solar-tongwei-tw410map-108-h-f) | 410 W | +10 W, +0.5 pp | | [Tongwei TW415MAP-108-H-F](https://comparepv.com/panel/tw-solar-tongwei-tw415map-108-h-f) | 415 W | +15 W, +0.8 pp | | [Tongwei TW420MAP-108-H-F](https://comparepv.com/panel/tw-solar-tongwei-tw420map-108-h-f) | 420 W | +20 W, +1.0 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +110 W, cooler, +4.5 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +95 W, cooler, +4.3 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +105 W, cooler, +4.2 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +105 W, cooler, +4.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +90 W, cooler, +4.0 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +100 W, cooler, +4.0 pp | --- Source: https://comparepv.com/panel/tw-solar-tongwei-tw400map-108-h-f Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.