--- title: "Tongwei TWMNH-48HW475 475W Solar Panel - Specs & Review | ComparePV" description: "Tongwei TWMNH-48HW475 475W solar panel. Specs: 23.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/tongwei-solar-twmnh-48hw475" updated: 2026-09-11 --- # Tongwei TWMNH-48HW475 Efficiency leader, no clear weak spot 301 panels in the segment N-type 450-500 W ## Identity - **Manufacturer:** Tongwei - **Model:** TWMNH-48HW475 - **Series:** TWMNH-48HW (N-type Half-cell Monofacial Dual Glass Black Frame Module (48)) - **Rated power:** 475 W - **Cell technology:** N-type ## How it compares Compared against segment N-type 450-500 W (301 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 475 W | 470 W | Typical | | | Module efficiency | 23.80% | 22.52% | Strong - top 5% | 433 | | Power density | 237.7 | 225.2 | Strong - top 5% | 467 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 21% | 1,309 | | Weight (kg) | 23.7 kg | 23.7 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.80% | 22.52% | Strong - top 5% | 433 | | Power density | 237.7 | 225.2 | Strong - top 5% | 467 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 21% | 1,309 | | Weight per kWp | 49.9 | 49.5 | Typical | 3,274 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **23.80% module efficiency** - Top 5% of the N-type 450-500 W segment, against a median of 22.52%. Ranked 433rd in the whole database. - **237.7 watts per square metre** - Top 5% of the N-type 450-500 W segment, against a median of 225.2. Ranked 467th in the whole database. - **-0.280 %/°C temperature coefficient** - Top 21% of the N-type 450-500 W segment, against a median of -0.290. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 475 W - **Efficiency:** 23.80 % - **Voltage at Pmax (Vmp):** 31.05 V - **Current at Pmax (Imp):** 15.30 A - **Open-circuit voltage (Voc):** 36.70 V - **Short-circuit current (Isc):** 15.97 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.280 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 96 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.7 kg - **Area:** 2.00 m2 - **Power density:** 237.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 415 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 433 of 14005 | | Power density | 467 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 3274 of 14005 | | Warranty | 21 of 14005 | ## About this series Tongwei TWMNH-48HW Series are monofacial dual-glass modules featuring a black frame, engineered for stable performance in real rooftop and commercial installations - where durability, aesthetics, and predictable yield matter. The application of N-type cells in a half-cell configuration helps minimize module losses and improves performance under partial shading, effectively simplifying the design of complex roof geometry systems. The series' key feature is its focus on reliability: the glass-to-glass construction enhances resistance to atmospheric conditions and long-term loads, while Tongwei’s production technologies, such as **0BB (908 Technology) with ultra-multiple connections**, boost resistance to micro-cracks and material fatigue. Furthermore, **TPE and precise screen printing** are optimized for better current conduction and repeatable quality. This is an excellent choice for investors seeking to combine high manufacturing standards with easy integration into modern PV systems - from residential homes to C&I projects. ## Notable figures - 23.8% module efficiency - 1.3pp better than the \*\*N-type 450-500W\*\* median of 22.5% - 237.7 W/m² power density - 12.5 W/m² more than \*\*N-type 450-500W\*\* median (225.2 W/m²), more power per roof area - Temperature coefficient of -0.28%/°C matches the \*\*N-type 450-500W\*\* median - Ranked #433 out of 14005 panels for efficiency in the database ## Questions ### What is the maximum power and efficiency of the Tongwei TWMNH-48HW panel? The panel reaches up to 475 Wp with an efficiency of 22.8-23.8%, thanks to N-type cells in a half-cut configuration (96 half-cells cut from 48 full cells). A low power temperature coefficient of -0.28%/°C means smaller yield losses on hot days compared to older P-type technology, translating into higher annual energy production. ### Are Tongwei TWMNH-48HW panels suitable for a pitched residential roof? Yes, the 1762×1134×30 mm format and 23.7 kg weight fit standard mounting systems for typical pitched roofs. The half-cut cell design limits power loss from partial shading caused by chimneys or dormers, making it easier to design layouts on roofs with irregular geometry. However, the higher weight of the dual-glass construction should be factored into the mounting structure selection. ### What warranty comes with the Tongwei TWMNH-48HW series? The manufacturer offers a 15-year product warranty and a 30-year linear power warranty - at least 99% of nominal power is guaranteed after the first year, and no less than 87.4% after 30 years. These are among the longer coverage periods on the market, backed by Tongwei's status as a Tier 1 manufacturer with a Chinese manufacturing base. ### How does the dual-glass construction of the TWMNH-48HW differ from a standard backsheet panel? A 2.0+2.0 mm glass layer on both sides of the cells, instead of a polymer backsheet, significantly improves resistance to moisture, PID degradation, and UV exposure, resulting in longer service life and lower power degradation over time. The trade-off is added panel weight, which is why dual-glass modules perform especially well in installations exposed to harsh weather conditions. ### What is the 0BB (908 Technology) used in the TWMNH-48HW, and is it worth choosing? 0BB is a zero-busbar technology that replaces traditional soldered busbars with ultra-multiple thin conductive connections. This reduces the risk of microcracks and material fatigue from thermal cycling, improves module aesthetics by minimizing visible lines on the surface, and increases current-collection efficiency from the cell. It's a genuine benefit for long-term installation durability. ### Is the Tongwei TWMNH-48HW panel bifacial, and can it be mounted on a facade? No, the TWMNH-48HW series is a monofacial module - it generates energy only from the front side of the panel. It is not optimized for installations relying on ground or surface albedo reflection, typical of bifacial modules. It performs very well, however, in standard rooftop and ground-mount installations where structural durability and predictable single-sided yield matter most. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/TNC2-0-TWMNH-48HW455-475W-B30-28-115-ee5039479e17.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +35 W, cooler, +1.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +1.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +30 W, cooler, +0.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +0.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +25 W, cooler, +0.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +25 W, lighter, +0.7 pp | | [Tongwei TWMNH-48HD430](https://comparepv.com/panel/tongwei-twmnh-48hd430) | 430 W | -45 W, lighter, -2.3 pp | | [Tongwei TWMNH-48HD435](https://comparepv.com/panel/tongwei-twmnh-48hd435) | 435 W | -40 W, lighter, -2.0 pp | | [Tongwei TWMNH-48HD440](https://comparepv.com/panel/tongwei-twmnh-48hd440) | 440 W | -35 W, lighter, -1.8 pp | | [Tongwei TWMNH-48HD445](https://comparepv.com/panel/tongwei-solar-twmnh-48hd445) | 445 W | -30 W, lighter, -1.5 pp | | [Tongwei TWMNH-48HD450](https://comparepv.com/panel/tongwei-solar-twmnh-48hd450) | 450 W | -25 W, lighter, -1.3 pp | --- Source: https://comparepv.com/panel/tongwei-solar-twmnh-48hw475 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.