--- title: "Suntech STP490S-H54-Nfb+ 490W Solar Panel - Specs & Review | ComparePV" description: "Suntech STP490S-H54-Nfb+ 490W solar panel. Specs: 22.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/suntech-stp490s-h54-nfb" updated: 2026-09-11 --- # Suntech STP490S-H54-Nfb+ Middle of its segment, modest efficiency 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Suntech - **Model:** STP490S-H54-Nfb+ - **Series:** Ultra V Pro (Glass-Glass Monofacial) - **Rated power:** 490 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 490 W | 465 W | Strong - top 12% | | | Module efficiency | 22.00% | 22.52% | Weak - bottom 18% | 6,517 | | Power density | 220.3 | 225.2 | Weak - bottom 19% | 6,276 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 23.5 kg | 24.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.00% | 22.52% | Weak - bottom 18% | 6,517 | | Power density | 220.3 | 225.2 | Weak - bottom 19% | 6,276 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 48.0 | 52.2 | Typical | 1,984 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **22.00% module efficiency** - Bottom 18% of the TOPCon 450-500 W segment, against a median of 22.52%. - **220.3 watts per square metre** - Bottom 19% of the TOPCon 450-500 W segment, against a median of 225.2. - **Best for:** Commercial and shaded-installations. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 490 W - **Efficiency:** 22.00 % - **Voltage at Pmax (Vmp):** 32.90 V - **Current at Pmax (Imp):** 14.89 A - **Open-circuit voltage (Voc):** 39.70 V - **Short-circuit current (Isc):** 15.79 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 108 ### Physical - **Length:** 1961 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.5 kg - **Area:** 2.22 m2 - **Power density:** 220.3 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 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:** 428 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6517 of 14005 | | Power density | 6276 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 1984 of 14005 | | Warranty | 21 of 14005 | ## About this series Suntech Ultra V Pro (Glass-Glass Monofacial) modules are designed for long-term, stable performance where predictable yield and high environmental resistance are key. The application of **glass-glass construction** genuinely enhances laminate rigidity and minimizes the risk of microcracks and humidity-related degradation - a practical advantage in installations exposed to large temperature fluctuations, wind, or heavy snow loads. This series utilizes **N-type TOPCon monocrystalline cells**, which maintain their parameters over time and support high operational performance under varying sunlight conditions. Combined with **multi-busbar and half-cut** solutions, the module becomes more resistant to partial shading losses and thermal stress. Ultra V Pro (Glass-Glass Monofacial) is particularly suitable for commercial and industrial rooftops, warehouses, and projects where **long-term reliability** and lower service risk are prioritized. It outshines competitors by focusing on the durability of the glass-glass package and the cell technology designed for real-world performance, not just catalog data. ## Notable figures - Module efficiency of 22.0% is 0.5pp below average for \*\*TOPCon 450-500W\*\* panels (median: 22.5%) - Power density of 220.3 W/m² is 4.8 W/m² below \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - needs more roof space - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 450-500W\*\* panels - Ranked #6517 out of 14005 panels for efficiency in the database ## Questions ### What is the maximum power output of the Suntech Ultra V Pro (Glass-Glass Monofacial) panels? The Ultra V Pro series reaches a maximum power output of up to 490 Wp. This is achieved through N-type TOPCon monocrystalline cells combined with half-cut and multi-busbar technology, which reduce energy losses and ensure high conversion efficiency even under variable irradiance. This power rating makes the series attractive for both commercial installations and larger residential systems. ### How does a glass-glass construction differ from a standard glass-backsheet panel? In a glass-glass construction, cells are sealed between two glass sheets instead of glass and a rear polymer backsheet. This increases laminate rigidity and effectively reduces the risk of cell microcracks and moisture-related degradation. In practice, this means greater module durability under harsh conditions - large temperature swings, strong wind, or snow loads - resulting in lower failure risk over the system's lifetime. ### What warranty comes with the Suntech Ultra V Pro panels? The manufacturer offers a 25-year product warranty and a 30-year power output warranty. These are among the longest warranty periods available on the market, reflecting the manufacturer's confidence in the durability of the glass-glass construction and the long-term stability of TOPCon cell parameters. A long power warranty also means lower risk of energy yield decline over the years of operation. ### Is the Ultra V Pro a bifacial panel? No, the Ultra V Pro (Glass-Glass Monofacial) series is a monofacial module - despite its glass-glass construction, it generates power only from the front side of the panel. The dual-glass design here was chosen primarily for enhanced mechanical durability and moisture resistance, not for generating additional yield from the rear side as in bifacial modules. ### What installations are the Ultra V Pro panels best suited for? This series performs particularly well on commercial and industrial roofs, warehouses, and projects where long-term reliability and minimized service risk are top priorities. The reinforced glass-glass construction withstands harsh environmental conditions such as strong wind and snow loads well, making it a solid option for demanding climates too. ### Is Suntech a Tier 1 manufacturer, and where are these panels produced? Yes, Suntech is classified as a Tier 1 manufacturer, reflecting strong financial stability and a documented track record of large-scale supply to bankable projects. The company is headquartered in China, where it also runs its main production facilities. Tier 1 status matters for project financing, since banks and insurers often require panels from manufacturers in this category. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/136194645267db88d62b0ff-e91291bc5373.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +20 W, cooler, +3.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +2.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +15 W, cooler, +2.7 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +10 W, cooler, +2.5 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +2.5 pp | | [Suntech STP495S-H54-Nfb+](https://comparepv.com/panel/suntech-stp495s-h54-nfb) | 495 W | +0.3 pp | | [Suntech STP500S-H54-Nfb+](https://comparepv.com/panel/suntech-stp500s-h54-nfb) | 500 W | +10 W, +0.5 pp | | [Suntech STP505S-H54-Nfb+](https://comparepv.com/panel/suntech-stp505s-h54-nfb) | 505 W | +15 W, +0.7 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +70 W, cooler, +2.8 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +65 W, cooler, +2.6 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +60 W, lighter, +2.4 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +50 W, cooler, +2.4 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +50 W, cooler, +2.4 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +55 W, heavier, +2.3 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/suntech-stp490s-h54-nfb 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.