--- title: "Tongwei TWMNH-54HD515 Solar Panel: Specs & Datasheet | ComparePV" description: "Tongwei TWMNH-54HD515 solar panel. Specs: 23.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/tongwei-solar-twmnh-54hd515" image: "https://comparepv.com/og/panel/tongwei-solar-twmnh-54hd515.png" updated: 2026-09-11 --- # Tongwei TWMNH-54HD515 Efficiency leader, no clear weak spot 142 panels in the segment N-type 500-550 W ## Identity - **Manufacturer:** Tongwei - **Model:** TWMNH-54HD515 - **Series:** TWMNH-54HD - **Rated power:** 515 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 500-550 W (142 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 515 W | 520 W | Typical | | | Module efficiency | 23.20% | 22.55% | Strong - top 18% | 1,349 | | Power density | 231.6 | 225.3 | Strong - top 19% | 1,518 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 23% | 1,347 | | Weight (kg) | 26.5 kg | 26.2 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.20% | 22.55% | Strong - top 18% | 1,349 | | Power density | 231.6 | 225.3 | Strong - top 19% | 1,518 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 23% | 1,347 | | Weight per kWp | 51.5 | 50.0 | Typical | 4,858 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **23.20% module efficiency** - Top 18% of the N-type 500-550 W segment, against a median of 22.55%. - **231.6 watts per square metre** - Top 19% of the N-type 500-550 W segment, against a median of 225.3. - **-0.280 %/°C temperature coefficient** - Top 23% of the N-type 500-550 W segment, against a median of -0.290. - **Best for:** Residential, commercial, shaded-installations and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 515 W - **Efficiency:** 23.20 % - **Voltage at Pmax (Vmp):** 34.43 V - **Current at Pmax (Imp):** 14.96 A - **Open-circuit voltage (Voc):** 40.60 V - **Short-circuit current (Isc):** 15.98 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:** 108 - **Bifacial:** yes ### Physical - **Length:** 1961 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 26.5 kg - **Area:** 2.22 m2 - **Power density:** 231.6 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:** 450 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1349 of 14129 | | Power density | 1518 of 14129 | | Temperature coefficient | 1347 of 14129 | | Weight | 4858 of 14129 | | Warranty | 21 of 14129 | ## About this series The Tongwei TWMNH-54HD series is designed for maximum energy yield on limited surfaces-ideal where high efficiency and stable operation in challenging conditions are essential. The use of **N-type TOPCon cells** ensures excellent performance at high temperatures and lower operational losses, genuinely supporting production predictability in the coming years. The **bifacial** construction harnesses reflected light from the ground, enabling higher energy output without increasing the number of modules. Additionally, **dual glass** enhances resistance to moisture and material aging, crucial for rooftop and ground installations. **Half-cut technology** minimizes shading impacts and reduces module losses, facilitating wiring designs in demanding locations. This solution excels in modern premium residential systems, commercial rooftops, and utility-scale PV farms, where yield, longevity, and reliable performance are paramount. ## Notable figures - Efficiency of 23.2% is 0.6pp above the \*\*N-type 500-550W\*\* median (22.6%) - Power density of 231.6 W/m² packs 6.3 W/m² more into the same footprint vs \*\*N-type 500-550W\*\* median (225.3 W/m²) - Temperature coefficient of -0.28%/°C matches the \*\*N-type 500-550W\*\* median - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - Ranked #1349 out of 14129 panels for efficiency in the database ## Questions ### What is the maximum power and efficiency of the Tongwei TWMNH-54HD panel? The TWMNH-54HD series reaches a maximum power output of up to 515 Wp with module efficiency reaching 23.2%. This is achieved through 108 N-type TOPCon half-cut cells, which reduce resistive losses and make better use of the available surface area. Higher efficiency means fewer modules are needed to reach a target system capacity, which lowers mounting structure and cabling costs. ### Are TWMNH-54HD panels suitable for mounting on a sloped residential roof? Yes, though the panel's dimensions should be considered - 1961x1134x30 mm and a weight of 26.5 kg are typical for dual-glass modules, somewhat heavier than standard single-glass panels. The frame withstands wind loads up to 2400 Pa and snow loads up to 5400 Pa, meeting requirements for most sloped roofs in temperate climates. Before installation, check the existing roof structure's load capacity and choose suitable mounting hardware. ### What is N-type TOPCon technology and how does it differ from popular PERC? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology with an additional passivation layer that reduces electron recombination and increases efficiency compared to P-type PERC cells. In practice this means higher energy yield, a smaller power drop at high temperatures, and slower degradation over time. TWMNH-54HD panels use this technology, resulting in more predictable energy production throughout the 30-year power warranty period. ### Do Tongwei TWMNH-54HD panels perform well in high summer temperatures? Yes, thanks to N-type TOPCon technology the temperature coefficient of power is -0.28%/°C, better than typical PERC panels (usually around -0.35%/°C). This means a smaller power drop on hot summer days when module temperature can exceed 60°C. For installations in temperate climates, this results in a more stable energy yield during summer months when solar irradiance is highest. ### What warranty does Tongwei offer on the TWMNH-54HD series? The manufacturer provides a 15-year product warranty and a 30-year linear power warranty, guaranteeing at least 87.4% of initial power output after 30 years. Tongwei is a Tier 1 manufacturer based in China, meaning stable financial standing and realistic ability to honor warranty claims over the long term. This is an important factor when choosing panels for a system expected to operate for decades. ### How much extra energy does bifacial construction provide compared to standard panels? Bifacial panels in the TWMNH-54HD series capture light reflected off the ground and can generate up to 25% more energy than standard monofacial modules, depending on the ground albedo beneath the array (light gravel, snow, or a white roof surface increase the effect). The added dual-glass layer also improves resistance to moisture and material aging, relevant both for ground-mount installations and flat roofs with proper tilt angle. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/twmnh-54hd495-515w-b30-28-12-fb4cb4aa4358.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +1.8 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +1.6 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +45 W, cooler, +1.6 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +1.5 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | Cooler, lighter, +1.5 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +40 W, cooler, +1.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | -25 W, lighter, +1.3 pp | | [Tongwei TWMNH-54HD495](https://comparepv.com/panel/tongwei-solar-twmnh-54hd495) | 495 W | -20 W, -0.9 pp | | [Tongwei TWMNH-54HD500](https://comparepv.com/panel/tongwei-solar-twmnh-54hd500) | 500 W | -15 W, -0.7 pp | | [Tongwei TWMNH-54HD505](https://comparepv.com/panel/tongwei-solar-twmnh-54hd505) | 505 W | -10 W, -0.5 pp | | [Tongwei TWMNH-54HD510](https://comparepv.com/panel/tongwei-solar-twmnh-54hd510) | 510 W | -0.3 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +35 W, lighter, +1.2 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +25 W, lighter, +1.2 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +25 W, lighter, +1.2 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +30 W, cooler, +1.1 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +30 W, cooler, +1.0 pp | --- Source: https://comparepv.com/panel/tongwei-solar-twmnh-54hd515 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.