--- title: "Suntech STP545S-C72/Pmh+ Solar Panel: Specs & Datasheet | ComparePV" description: "Suntech STP545S-C72/Pmh+ solar panel. Specs: 21.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/suntech-stp545s-c72-pmh" image: "https://comparepv.com/og/panel/suntech-stp545s-c72-pmh.png" updated: 2026-09-11 --- # Suntech STP545S-C72/Pmh+ Middle of its segment, weak in heat 435 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** Suntech - **Model:** STP545S-C72/Pmh+ - **Series:** Ultra V - **Rated power:** 545 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 500-550 W (435 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 545 W | 510 W | Strong - top 2% | | | Module efficiency | 21.10% | 22.74% | Weak - bottom 6% | 9,365 | | Power density | 211.0 | 227.4 | Weak - bottom 6% | 9,380 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 5% | 8,846 | | Weight (kg) | 32.0 kg | 27.0 kg | Weak - bottom 5% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.10% | 22.74% | Weak - bottom 6% | 9,365 | | Power density | 211.0 | 227.4 | Weak - bottom 6% | 9,380 | | Temperature coefficient | -0.340 | -0.290 | Weak - bottom 5% | 8,846 | | Weight per kWp | 58.7 | 52.4 | Weak - bottom 5% | 11,933 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **-0.340 %/°C temperature coefficient** - Bottom 5% of the TOPCon 500-550 W segment, against a median of -0.290. Ranked 8,846th in the whole database. - **58.7 kg per kWp** - Bottom 5% of the TOPCon 500-550 W segment, against a median of 52.4. Ranked 11,933rd in the whole database. - **21.10% module efficiency** - Bottom 6% of the TOPCon 500-550 W segment, against a median of 22.74%. Ranked 9,365th in the whole database. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Hot climates, weight-limited structures and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 545 W - **Efficiency:** 21.10 % - **Voltage at Pmax (Vmp):** 41.87 V - **Current at Pmax (Imp):** 13.02 A - **Open-circuit voltage (Voc):** 49.69 V - **Short-circuit current (Isc):** 13.96 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.050 %/degC - **NOCT:** 42 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 144 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2278 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.0 kg - **Area:** 2.58 m2 - **Power density:** 211.0 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 85.0 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.45 % - **Output after 30 years:** 463 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 9365 of 14129 | | Power density | 9380 of 14129 | | Temperature coefficient | 8846 of 14129 | | Weight | 11933 of 14129 | | Warranty | 21 of 14129 | ## About this series The Suntech Ultra V series redefines performance standards through the use of large-scale M10 silicon wafers and advanced **Half-Cut** technology. This design effectively solves the problem of power losses resulting from internal resistance, which translates into higher yields even in difficult lighting conditions. A key differentiator is the innovative **high-density cell interconnect**, which minimizes gaps between them, maximizing the module's active area without drastically increasing its dimensions. Thanks to the use of **Multi-Busbar** technology, the panels show less susceptibility to micro-cracks and conduct current more efficiently. This series was designed for commercial investments and photovoltaic farms, where **low LCOE cost of energy** and operational stability at high temperatures are of key importance. Solid construction and optimized mechanical stress distribution make the Ultra V outperform the competition in terms of resistance to extreme weather events. Choosing this line is a guarantee of safety for projects requiring the highest reliability and fast return on investment, while maintaining excellent aesthetics. ## Notable figures - At 21.1% efficiency, this panel is 1.6pp below the \*\*TOPCon 500-550W\*\* median of 22.7% - At 211.0 W/m², this panel generates 16.4 W/m² less per unit area than \*\*TOPCon 500-550W\*\* median (227.4 W/m²) - At -0.34%/°C, loses 0.05pp more power per degree than \*\*TOPCon 500-550W\*\* median (-0.29%/°C) - At 32.0 kg, this panel is 5.0 kg heavier than the \*\*TOPCon 500-550W\*\* median (27.0 kg) - more demanding for installation crews - Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface ## Questions ### How does the TOPCon technology used in Suntech Ultra V differ from older PERC cells? TOPCon (Tunnel Oxide Passivated Contact) uses an additional ultra-thin passivating oxide layer that reduces carrier recombination on the rear side of the cell. In practice, this means higher conversion efficiency, a smaller power drop at high temperatures, and slower degradation over time compared to conventional PERC cells used in older series. ### Do bifacial Suntech Ultra V panels actually generate more energy than standard modules? Yes, the bifacial design of Ultra V captures light reflected off the ground, roof, or surrounding surfaces, which with a bright mounting surface (e.g., white gravel, light-colored roof) can yield an additional energy gain of several to over ten percent compared to monofacial panels. The effect depends on mounting height, ground albedo, and installation tilt angle. ### What warranty comes with Suntech Ultra V panels and what does it cover? The Ultra V series comes with a 12-year product warranty covering material and workmanship defects, plus a 30-year linear power warranty guaranteeing the declared energy output level over time. This is one of the longer coverage periods currently available on the market for this type of panel, reducing investment risk. ### Are Ultra V 550 Wp panels suitable for large commercial installations or solar farms? Yes, the series was designed specifically for commercial projects and utility-scale solar farms. The high unit power of 550 Wp reduces the number of modules needed for a given system capacity, lowering costs for racking, wiring, and labor, which directly contributes to a lower LCOE. ### Does Suntech, as a manufacturer, provide reliability and investment security for Ultra V panels? Suntech is a tier 1 manufacturer, meaning it appears on the list of reputable suppliers with documented financial stability, production scale, and a proven delivery track record for institutions financing renewable energy projects. This status makes it easier to secure bank financing and insurance for installations, since manufacturer-related risk is low. ### Do Suntech Ultra V panels perform well in summer, under high roof temperatures? Yes, thanks to TOPCon technology and the optimized Half-Cut cell structure, Ultra V panels have a lower power temperature coefficient than traditional PERC modules. This means a smaller efficiency drop as modules heat up during hot days, which is especially important on roofs with poor ventilation. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/STP545-565S-C72-Pmh_EN-2d0dc00bc402.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, lighter, +3.9 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +3.7 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, lighter, +3.7 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, lighter, +3.6 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | Cooler, lighter, +3.6 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, lighter, +3.5 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, lighter, +3.4 pp | | [Suntech STP530S-C72/Pmh+](https://comparepv.com/panel/suntech-stp530s-c72-pmh) | 530 W | -15 W, -0.6 pp | | [Suntech STP535S-C72/Pmh+](https://comparepv.com/panel/suntech-stp535s-c72-pmh) | 535 W | -10 W, -0.4 pp | | [Suntech STP540S-C72/Pmh+](https://comparepv.com/panel/suntech-stp540s-c72-pmh) | 540 W | -0.2 pp | | [Suntech STP545S-C72/Nmh+](https://comparepv.com/panel/wuxi-suntech-power-co-ltd-stp545s-c72-nmh) | 545 W | Cooler | | [Suntech STP550S-C72/Pmh+](https://comparepv.com/panel/suntech-stp550s-c72-pmh) | 550 W | Very close match | | [Suntech STP550S-C72/Nmh+](https://comparepv.com/panel/wuxi-suntech-power-co-ltd-stp550s-c72-nmh) | 550 W | Cooler | | [Suntech STP555S-C72/Pmh+](https://comparepv.com/panel/suntech-stp555s-c72-pmh) | 555 W | +10 W, +0.4 pp | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +105 W, cooler, +4.1 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +100 W, cooler, +3.9 pp | --- Source: https://comparepv.com/panel/suntech-stp545s-c72-pmh 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.