--- title: "Tongwei TWMNH-48HD435 435W Solar Panel - Specs & Review | ComparePV" description: "Tongwei TWMNH-48HD435 435W solar panel. Specs: 21.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/tongwei-twmnh-48hd435" updated: 2026-09-11 --- # Tongwei TWMNH-48HD435 Strong in heat, no clear weak spot 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Tongwei - **Model:** TWMNH-48HD435 - **Series:** TWMNH - **Rated power:** 435 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 435 W | 435 W | Typical | | | Module efficiency | 21.80% | 22.00% | Typical | 7,022 | | Power density | 217.7 | 220.2 | Typical | 7,066 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 4% | 1,309 | | Weight (kg) | 20.9 kg | 22.0 kg | Strong - top 20% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.80% | 22.00% | Typical | 7,022 | | Power density | 217.7 | 220.2 | Typical | 7,066 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 4% | 1,309 | | Weight per kWp | 48.0 | 51.4 | Strong - top 20% | 2,031 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 4% of the TOPCon 400-450 W segment, against a median of -0.290. Ranked 1,309th in the whole database. - **48.0 kg per kWp** - Top 20% of the TOPCon 400-450 W segment, against a median of 51.4. - **Best for:** Commercial, utility-scale and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 435 W - **Efficiency:** 21.80 % - **Voltage at Pmax (Vmp):** 29.42 V - **Current at Pmax (Imp):** 14.79 A - **Open-circuit voltage (Voc):** 35.15 V - **Short-circuit current (Isc):** 15.86 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 - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 96 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 20.9 kg - **Area:** 2.00 m2 - **Power density:** 217.7 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:** 380 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7022 of 14005 | | Power density | 7066 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 2031 of 14005 | | Warranty | 21 of 14005 | ## About this series Tongwei TWMNH series photovoltaic panels are based on advanced **N-type TOPCon** cells, which represents a significant technological leap compared to traditional P-type modules. The use of **Super Multi-Busbar (SMBB)** technology allows for more efficient light capturing and a significant reduction in the current flow path, which directly translates into lower internal power losses. For investors, an effective solution to the problem of degradation caused by light and high ambient temperatures is key - the TWMNH series is characterized by **exceptional resistance to LID and LeTID degradation** and a very favorable temperature coefficient. As a result, photovoltaic systems operate extremely efficiently even on hot summer days, generating more energy from the same roof or ground area. These modules are primarily dedicated to demanding commercial and industrial installations, where the priority is maximizing the return on investment in the long term. What clearly distinguishes them from market competition is their **high efficiency in low-light conditions** and precise quality control at every stage of cell production, which guarantees full repeatability of technical parameters. By choosing the TWMNH series, the investor gains the assurance of stable and failure-free system operation for many decades, making these panels one of the most cost-effective choices in today's modern photovoltaics market. ## Notable figures - Efficiency of 21.8% matches the \*\*TOPCon 400-450W\*\* median - Power density of 217.7 W/m² matches the \*\*TOPCon 400-450W\*\* median - At -0.28%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - Weight of 20.9 kg (1.1 kg below \*\*TOPCon 400-450W\*\* median of 22.0 kg) allows easier transport and roof mounting - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### How does N-type TOPCon cell technology in the Tongwei TWMNH series differ from traditional P-type cells? N-type TOPCon cells used in the TWMNH series feature an additional passivation layer that significantly reduces electron recombination on the rear side of the cell. In practice, this delivers higher efficiency (often above 23%), lower degradation over time, and better performance at high temperatures compared to classic P-type PERC modules. It's a newer-generation technology now considered the premium standard in solar. ### What warranty comes with Tongwei TWMNH panels and what does it cover? The TWMNH series comes with a 15-year product warranty covering material and manufacturing defects, plus a 30-year linear power output warranty. This means the manufacturer guarantees a defined minimum energy generation level over three decades, with a slow, predictable power decline over time - an important factor when calculating long-term return on investment. ### Are Tongwei TWMNH panels rated at 635 W suitable for residential installations, or only commercial ones? TWMNH panels rated up to 635 Wp have large form factors and high output current, making them primarily designed for commercial, industrial, and utility-scale solar farm installations where maximizing power per square meter matters most. On a typical sloped residential roof they may be too large and heavy for convenient installation - smaller residential-class modules are usually a better fit in that case. ### Are Tongwei TWMNH panels bifacial, generating power from the rear side as well? No, TWMNH series panels in this configuration are mono-facial modules - they generate power only from the front side. This makes installation simpler and less dependent on ground reflectivity compared to bifacial panels, which need a bright, light-reflecting surrounding surface to fully exploit rear-side generation potential. ### How do TWMNH panels perform during summer heat on a hot rooftop? Thanks to TOPCon cell technology and Super Multi-Busbar (SMBB) design, the TWMNH series has a favorable power temperature coefficient, meaning less output loss as module temperature rises on hot days. These panels are also resistant to LID and LeTID degradation, caused by the combination of light exposure and high heat, so they retain more power in summer than typical P-type modules. ### Is Tongwei a reliable Tier 1 solar panel manufacturer, and are TWMNH panels a safe investment choice? Yes, Tongwei is a Chinese manufacturer classified as Tier 1, reflecting its financial stability, large-scale cell production, and long-standing international market presence. The TWMNH series undergoes rigorous quality control at every production stage, and these models remain in active production and available for purchase, making them a safe choice for long-term commercial investments. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/d013442b2ad8fd4da7a998200d4a0a2b-a7b00eef8ed1.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +50 W, cooler, +2.5 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +50 W, cooler, +2.5 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | +50 W, heavier, +2.5 pp | | [Tongwei TWMNH-48HD430](https://comparepv.com/panel/tongwei-twmnh-48hd430) | 430 W | -0.3 pp | | [Tongwei TWMNH-48HD440](https://comparepv.com/panel/tongwei-twmnh-48hd440) | 440 W | Very close match | | [Tongwei TWMNH-48HD445](https://comparepv.com/panel/tongwei-solar-twmnh-48hd445) | 445 W | +10 W, +0.5 pp | | [Tongwei TWMNH-48HD450](https://comparepv.com/panel/tongwei-solar-twmnh-48hd450) | 450 W | +15 W, +0.7 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +75 W, cooler, +3.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +60 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +70 W, cooler, +2.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +55 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +65 W, cooler, +2.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +65 W, cooler, +2.7 pp | --- Source: https://comparepv.com/panel/tongwei-twmnh-48hd435 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.