--- title: "Suntech STP450S-B72/Vnh Solar Panel: Specs & Datasheet | ComparePV" description: "Suntech STP450S-B72/Vnh solar panel. Specs: 20.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/suntech-stp450s-b72-vnh" image: "https://comparepv.com/og/panel/suntech-stp450s-b72-vnh.png" updated: 2026-09-11 --- # Suntech STP450S-B72/Vnh Middle of its segment, weak in heat 7,523 panels in the 350-550 W band, all technologies ## Identity - **Manufacturer:** Suntech - **Model:** STP450S-B72/Vnh - **Series:** Ultra S - **Rated power:** 450 W - **Cell technology:** Monocrystalline ## How it compares Compared against 350-550 W band, all technologies (7523 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 450 W | 445 W | Typical | | | Module efficiency | 20.70% | 21.48% | Typical | 10,842 | | Power density | 206.7 | 214.4 | Typical | 10,996 | | Temperature coefficient | -0.360 | -0.300 | Weak - bottom 8% | 12,425 | | Weight (kg) | 24.5 kg | 23.5 kg | Typical | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 17% | 9,912 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.70% | 21.48% | Typical | 10,842 | | Power density | 206.7 | 214.4 | Typical | 10,996 | | Temperature coefficient | -0.360 | -0.300 | Weak - bottom 8% | 12,425 | | Weight per kWp | 54.4 | 52.7 | Typical | 8,835 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 17% | 9,912 | ### Watch out for - **-0.360 %/°C temperature coefficient** - Bottom 8% of the 350-550 W band, against a median of -0.300. Ranked 12,425th in the whole database. - **25 year performance warranty** - Bottom 17% of the 350-550 W band, against a median of 30 yrs. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Hot climates and owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 450 W - **Efficiency:** 20.70 % - **Voltage at Pmax (Vmp):** 41.40 V - **Current at Pmax (Imp):** 10.87 A - **Open-circuit voltage (Voc):** 49.20 V - **Short-circuit current (Isc):** 11.61 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.360 %/degC - **Temperature coefficient of Voc:** -0.304 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell count:** 144 ### Physical - **Length:** 2095 mm - **Width:** 1039 mm - **Thickness:** 35 mm - **Weight:** 24.5 kg - **Area:** 2.18 m2 - **Power density:** 206.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 369 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10842 of 14129 | | Power density | 10996 of 14129 | | Temperature coefficient | 12425 of 14129 | | Weight | 8835 of 14129 | | Warranty | 9912 of 14129 | ## About this series The Ultra S series from Suntech combines proven half-cut cell technology with a multi-busbar current path layout, shortening the current transverse propagation distance within each cell and reducing resistance losses. The use of large-format 166 mm silicon wafers enables high module power output while keeping a compact footprint, which directly translates into a smaller installation area and lower mounting structure and labor costs. **Half-cut cell technology** lowers the average operating temperature of the cells, limiting power loss at higher panel temperatures, while the **multi-busbar architecture** improves electron collection and boosts energy yield even under partial shading conditions. A non-destructive cell-cutting process minimizes microcracks and linear losses, contributing to the module's long-term **reliability**. The Ultra S series performs well both in rooftop installations on residential and commercial buildings and in smaller ground-mounted solar farms, where high power density per square meter matters most. Thanks to **optimized BoS cost** (Balance of System), investors can achieve a lower LCOE for the energy generated by the installation. This is a solution for those seeking a proven, mature silicon technology delivering high energy density and stable performance over many years of operation. ## Notable figures - Module efficiency of 20.7% is 1.1pp below average for \*\*database\*\* panels (median: 21.8%) - Power density of 206.7 W/m² is 11.4 W/m² below \*\*database\*\* median (218.1 W/m²) - needs more roof space - Temperature coefficient of -0.36%/°C is 0.06pp worse than \*\*database\*\* median (-0.30%/°C) - higher losses in summer heat - Weight of 24.5 kg (2.0 kg below \*\*database\*\* median of 26.5 kg) allows easier transport and roof mounting - Ranked #10764 out of 14005 panels for efficiency in the database ## Questions ### What is half-cut and multi-busbar technology in Suntech Ultra S panels, and does it actually improve energy yield? Half-cut means a standard cell is split in half, so current travels a shorter path and resistive losses are lower. Combined with a multi-busbar grid, the lateral current path is cut by up to 50%, further reducing losses and improving electron collection. In practice, the Ultra S achieves higher efficiency (up to 20.6%) and performs better under partial shading than older full-cell modules. ### What warranty comes with Suntech Ultra S 460Wp panels? Suntech provides a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. This means that after 30 years of operation, the module should still deliver a guaranteed percentage of its initial rated power, following the degradation curve stated in the manufacturer's datasheet. This is typical of Tier 1 manufacturers and gives investors confidence in long-term project returns. ### Are Suntech Ultra S 460Wp panels suitable for a residential roof? Yes, the Ultra S series is designed for both residential rooftop installations and commercial buildings, as well as smaller PV farms. Compact dimensions from 166mm wafers and up to 460Wp output deliver high power density per square meter of roof, which matters when roof space is limited. The module weight (about 24.4kg) and reinforced mechanical load rating make it compatible with standard mounting structures. ### Is the Suntech Ultra S a bifacial panel? No, the Ultra S 460Wp series is a monofacial module, generating power only from its front side. If you need extra yield from reflected light off the ground or a light-colored roof, you would need to consider a separate bifacial product line from Suntech. The Ultra S is better suited where a simpler, proven design and lower unit cost at high module power are the priority. ### How do Suntech Ultra S panels perform in high roof temperatures? Half-cut technology lowers the average cell operating temperature compared to classic full-cell modules, reducing power loss during hot weather and roof heat buildup. Smaller cells dissipate heat more effectively, and the non-destructive cutting method minimizes microcracks that could worsen losses under temperature cycling. As a result, the Ultra S maintains more stable output in summer than older designs without this technology. ### Is Suntech a reliable panel manufacturer, and where are the modules made? Suntech is a China-based manufacturer classified as Tier 1, meaning it has a documented track record of financial stability and years of industrial-scale PV module production. Tier 1 status lowers the risk of manufacturer bankruptcy during the warranty period and makes warranty claims easier to process. The Ultra S series is not discontinued and remains currently available in the product lineup. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/EN_Ultra_S_STP460S_B72_Vnh-becd677edea1.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, +4.1 pp, +5 yr warranty | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, +3.8 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +50 W, cooler, +3.8 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +50 W, cooler, +3.8 pp | | [Gokin GK-3-54HGb-500M](https://comparepv.com/panel/gokin-gk-3-54hgb-500m) | 500 W | +50 W, cooler, +3.8 pp | | [GCL GCL-NR10R/54BGDF](https://comparepv.com/panel/gcl-gcl-nr10r-54bgdf) | 500 W | +50 W, cooler, +3.8 pp | | [Suntech STP435S-B72/Pnh+](https://comparepv.com/panel/suntech-stp435s-b72-pnh) | 435 W | Heavier, -0.7 pp, +5 yr warranty | | [Suntech STP435S-B72/Pnhg](https://comparepv.com/panel/suntech-stp435s-b72-pnhg) | 435 W | -15 W, -0.7 pp | | [Suntech STP440S-B72/Pnh+](https://comparepv.com/panel/suntech-stp440s-b72-pnh) | 440 W | Heavier, -0.5 pp, +5 yr warranty | | [Suntech STP440S-B72/Vnh](https://comparepv.com/panel/suntech-stp440s-b72-vnh) | 440 W | -10 W, -0.5 pp | | [Suntech STP445S-B72/Pnh+](https://comparepv.com/panel/suntech-stp445s-b72-pnh) | 445 W | Heavier, -0.3 pp, +5 yr warranty | | [Suntech STP445S-B72/Vnh](https://comparepv.com/panel/suntech-stp445s-b72-vnh) | 445 W | -0.3 pp | | [Suntech STP450S-B72/Pnh+](https://comparepv.com/panel/suntech-stp450s-b72-pnh) | 450 W | Heavier, +5 yr warranty | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +140 W, cooler, +3.1 pp | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +135 W, cooler, +2.9 pp | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +130 W, cooler, +2.8 pp | --- Source: https://comparepv.com/panel/suntech-stp450s-b72-vnh Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.