--- title: "Suntech STP445S-H48-Nkh+ Solar Panel: Specs & Datasheet | ComparePV" description: "Suntech STP445S-H48-Nkh+ solar panel. Specs: 22.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/suntech-stp445s-h48-nkh-1" image: "https://comparepv.com/og/panel/suntech-stp445s-h48-nkh-1.png" updated: 2026-09-11 --- # Suntech STP445S-H48-Nkh+ Efficiency leader, no clear weak spot 1,220 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Suntech - **Model:** STP445S-H48-Nkh+ - **Series:** Ultra V Pro mini (STPXXXS-H48-Nkh+) - **Rated power:** 445 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 400-450 W (1220 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 445 W | 435 W | Strong - top 8% | | | Module efficiency | 22.30% | 22.00% | Strong - top 17% | 5,161 | | Power density | 222.7 | 220.2 | Typical | 5,365 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight (kg) | 21.5 kg | 22.0 kg | Strong - top 24% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.30% | 22.00% | Strong - top 17% | 5,161 | | Power density | 222.7 | 220.2 | Typical | 5,365 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 48.3 | 51.5 | Strong - top 24% | 2,196 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **22.30% module efficiency** - Top 17% of the TOPCon 400-450 W segment, against a median of 22.00%. - **48.3 kg per kWp** - Top 24% of the TOPCon 400-450 W segment, against a median of 51.5. - **Best for:** Residential, commercial, shaded-installations and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 445 W - **Efficiency:** 22.30 % - **Voltage at Pmax (Vmp):** 29.14 V - **Current at Pmax (Imp):** 15.27 A - **Open-circuit voltage (Voc):** 35.50 V - **Short-circuit current (Isc):** 15.93 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:** 96 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.5 kg - **Area:** 2.00 m2 - **Power density:** 222.7 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:** 389 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 5161 of 14129 | | Power density | 5365 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 2196 of 14129 | | Warranty | 21 of 14129 | ## About this series Suntech Ultra V Pro mini (STPXXXS-H48-Nkh+) series was designed with a focus on high power density, while maintaining a convenient format for installation teams. The modules utilize **N-type TOPCon cells**, resulting in more stable performance over time and better resistance to common degradation mechanisms found in older technologies. The application of the **half-cut** architecture helps minimize module losses and improves performance under partial shading - crucial for rooftops with vents, chimneys, or HVAC installations. Practically, this series addresses two common issues: maximizing yield on limited roof space and mitigating production drops during hot days, thanks to its **favorable temperature coefficient** typical for TOPCon modules. Additionally, the **extended linear power warranty** facilitates long-term investment planning. The Ultra V Pro mini series will perform exceptionally well in modern residential and small commercial installations, where reliability, predictable power output, and fast, high-quality installation without compromises are key. ## Notable figures - At 22.3% efficiency, this panel is on par with typical \*\*TOPCon 400-450W\*\* modules - At 222.7 W/m² power density, roof space requirements are typical for \*\*TOPCon 400-450W\*\* panels - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 400-450W\*\* median - Ranked #5161 out of 14129 panels for efficiency in the database ## Questions ### What is the maximum power output of the Suntech Ultra V Pro mini (STPXXXS-H48-Nkh+) panels? The Ultra V Pro mini series reaches up to 445 Wp of maximum power output. This is a strong result for a 48 half-cut cell format, thanks to N-type TOPCon technology, which delivers higher conversion efficiency than older PERC cells at a comparable module size. ### How does TOPCon technology in the Suntech Ultra V Pro mini differ from standard PERC panels? N-type TOPCon cells feature an additional passivation layer that reduces recombination losses and power loss over time. In practice, this means higher efficiency, a better temperature coefficient, and slower annual degradation compared to conventional P-type PERC panels, resulting in higher lifetime energy yield for the installation. ### What warranty comes with Suntech Ultra V Pro mini panels? Suntech offers a 15-year product warranty and a 30-year linear power warranty on this module. Such an extended power warranty period is typical for TOPCon panels and helps investors plan project profitability over a long time horizon, especially when financing or leasing a solar installation. ### Do Ultra V Pro mini panels perform well in summer under high roof temperatures? Yes, the TOPCon modules in this series have a favorable power temperature coefficient, limiting output drops during heat waves compared to older cell technologies. This helps the installation maintain higher efficiency in summer, when roof and panel surface temperatures rise significantly. ### Is Suntech Ultra V Pro mini suitable for roofs with partial shading, such as near chimneys or dormers? Yes, the half-cut cell architecture splits each cell in half, reducing power losses under partial shading and limiting the impact of a single shaded cell on the whole module. This is especially useful on roofs with chimneys, dormers, or HVAC units, where shadows fall on only part of the roof surface. ### Are Suntech Ultra V Pro mini panels bifacial? No, the Ultra V Pro mini series consists of monofacial modules, not designed to generate power from the rear side. This makes it well suited to typical rooftop installations, where the bifacial gain would be minimal and the priority is high power density in a standard format. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/149689484967db95a8822f5-19f496549e40.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +45 W, cooler, +2.2 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +45 W, cooler, +2.2 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +40 W, cooler, +2.0 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +40 W, cooler, +2.0 pp | | [Longi Solar LR7-54HJD-495M](https://comparepv.com/panel/longi-lr7-54hjd-495m) | 495 W | +50 W, cooler, +2.0 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +40 W, cooler, +2.0 pp | | [Suntech STP430S-H48-Nfb](https://comparepv.com/panel/suntech-stp430s-h48-nfb) | 430 W | -15 W, -0.8 pp | | [Suntech STP435S-H48-Nfb](https://comparepv.com/panel/suntech-stp435s-h48-nfb) | 435 W | -10 W, -0.5 pp | | [Suntech STP440S-H48-Nfb](https://comparepv.com/panel/suntech-stp440s-h48-nfb) | 440 W | -0.3 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +65 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +60 W, cooler, +2.4 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +60 W, heavier, +2.4 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +55 W, cooler, +2.2 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +55 W, cooler, +2.2 pp | --- Source: https://comparepv.com/panel/suntech-stp445s-h48-nkh-1 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.