--- title: "Tongwei TWMND-72HD580 580W Solar Panel - Specs & Review | ComparePV" description: "Tongwei TWMND-72HD580 580W solar panel. Specs: 22.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/tw-solar-tongwei-twmnd-72hd580" updated: 2026-09-11 --- # Tongwei TWMND-72HD580 Strong in heat, no clear weak spot 259 panels in the segment N-type 550-600 W ## Identity - **Manufacturer:** Tongwei - **Model:** TWMND-72HD580 - **Series:** TWMND N-type Half-cell Bifacial Module (72) 72HD580-600W - **Rated power:** 580 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 550-600 W (259 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 580 W | 580 W | Typical | | | Module efficiency | 22.50% | 22.45% | Typical | 4,222 | | Power density | 224.5 | 224.5 | Typical | 4,547 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 9% | 1,309 | | Weight (kg) | 31.5 kg | 29.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.50% | 22.45% | Typical | 4,222 | | Power density | 224.5 | 224.5 | Typical | 4,547 | | Temperature coefficient | -0.280 | -0.290 | Strong - top 9% | 1,309 | | Weight per kWp | 54.3 | 52.3 | Typical | 8,548 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.280 %/°C temperature coefficient** - Top 9% of the N-type 550-600 W segment, against a median of -0.290. Ranked 1,309th in the whole database. - **Best for:** Commercial, utility-scale and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 580 W - **Efficiency:** 22.50 % - **Voltage at Pmax (Vmp):** 43.93 V - **Current at Pmax (Imp):** 13.21 A - **Open-circuit voltage (Voc):** 52.30 V - **Short-circuit current (Isc):** 13.85 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:** N-type - **Cell count:** 144 - **Bifacial:** yes ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 31.5 kg - **Area:** 2.58 m2 - **Power density:** 224.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 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:** 507 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4222 of 14005 | | Power density | 4547 of 14005 | | Temperature coefficient | 1309 of 14005 | | Weight | 8548 of 14005 | | Warranty | 21 of 14005 | ## About this series The Tongwei TWMND N-type Half-cell Bifacial Module (72) 72HD580-600W is designed for maximizing energy yield where every percentage point of generation matters - from utility-scale PV farms to large commercial rooftops. Its key advantage is the **glass-glass bifacial structure**, which effectively utilizes reflected light from the ground, roof membranes, or snow, improving the energy balance of the installation without increasing its surface area. The application of **N-type cells in TOPCon technology** translates to high efficiency across various conditions and better parameter stability over time, helping mitigate the risk of underestimating production. The **half-cut with multi-busbar metallization** enhances resistance to microcracking and improves performance under partial shading, which is crucial for rooftops with technical obstructions. In practice, the series addresses rising BOS costs, as the high power per module enables more efficient string construction. For investors, the **linear long warranty** is also significant, valuable for projects with financing and a long payback period. ## Notable figures - Efficiency of 22.5% matches the \*\*N-type 550-600W\*\* median - Power density of 224.5 W/m² matches the \*\*N-type 550-600W\*\* median - Temperature coefficient of -0.28%/°C matches the \*\*N-type 550-600W\*\* median - At 31.5 kg, this panel is 2.0 kg heavier than the \*\*N-type 550-600W\*\* median (29.5 kg) - more demanding for installation crews - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### Are Tongwei TWMND 72HD580-600W panels still available for purchase? The TWMND 72HD580-600W series has been discontinued from current production and replaced by newer Tongwei models. Availability depends on distributor stock - it's worth asking about remaining batches from recent shipments. For new projects, the manufacturer recommends current N-type TOPCon modules from the same technology line, with comparable or higher power output. ### How much extra energy does the bifacial glass-glass design of this panel actually generate? The glass-glass bifacial construction captures light reflected from the ground, roof surface, or snow, typically adding several to over ten percent extra yield compared to a monofacial module - depending on ground albedo, mounting angle, and module height above the surface. Best results occur on light-colored roofs, gravel, or ground-mount installations with airflow beneath the panels. ### What is N-type TOPCon technology in Tongwei panels, and is it better than PERC? TOPCon is an N-type cell technology with an additional passivation layer that reduces energy losses and parameter degradation over time compared to older P-type PERC cells. This results in higher efficiency, better performance at high temperatures, and slower power decline over the years of operation, which matters for long-term investment projects. ### What warranty comes with Tongwei TWMND 72HD modules and what does it cover? The manufacturer provides a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. This means a guaranteed, gradually declining energy production level over three decades, an important factor when financing an installation through a loan or lease with a long payback horizon. ### Does the half-cut, multi-busbar format in these panels reduce losses from partial shading? Yes, splitting cells into halves and using a higher number of busbars limits the power drop of the whole string when only part of the panel is shaded - for example by a chimney, antenna, or leaf. This design also lowers the risk of microcracks and local cell overheating, extending the module's lifespan. ### Are the 580-600W TWMND modules suitable for large commercial installations and PV farms? Yes, the high power of a single module and the full-size 72-cell format are aimed mainly at large commercial rooftops and ground-mount installations, where optimizing BOS costs - cabling, mounting structures, and inverters - matters most. Fewer modules needed to reach a target power output shortens installation time and lowers the per-kW cost of the system. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/2-298a17f7c022.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +2.3 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | -25 W, lighter, +2.1 pp | | [AIKO AIKO-A630-MAH72Dw](https://comparepv.com/panel/aiko-aiko-a630-mah72dw) | 630 W | +50 W, cooler, +1.9 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | -30 W, 15 kg lighter, +1.9 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | -40 W, lighter, +1.9 pp | | [Tongwei TWMND-72 HD575](https://comparepv.com/panel/tongwei-twmnd-72-hd575) | 575 W | Very close match | | [Tongwei TWMND-72HD585](https://comparepv.com/panel/tw-solar-tongwei-twmnd-72hd585) | 585 W | Very close match | | [Tongwei TWMND-72HD590](https://comparepv.com/panel/tw-solar-tongwei-twmnd-72hd590) | 590 W | +10 W, +0.3 pp | | [Tongwei TWMND-72HD595](https://comparepv.com/panel/tw-solar-tongwei-twmnd-72hd595) | 595 W | +15 W, +0.5 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +70 W, lighter, +2.7 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +65 W, lighter, +2.5 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +60 W, lighter, +2.3 pp | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | +55 W, lighter, +2.1 pp | --- Source: https://comparepv.com/panel/tw-solar-tongwei-twmnd-72hd580 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.