--- title: "Suntech STP440S-H48-Nkh Solar Panel: Specs & Datasheet | ComparePV" description: "Suntech STP440S-H48-Nkh solar panel. Specs: 22.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/suntech-stp440s-h48-nkh" image: "https://comparepv.com/og/panel/suntech-stp440s-h48-nkh.png" updated: 2026-09-11 --- # Suntech STP440S-H48-Nkh Solid all-round for its segment 1,220 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Suntech - **Model:** STP440S-H48-Nkh - **Series:** Ultra V Pro mini (STPXXXS-H48-Nkh) - **Rated power:** 440 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) | 440 W | 435 W | Typical | | | Module efficiency | 22.00% | 22.00% | Typical | 6,580 | | Power density | 220.2 | 220.2 | Typical | 6,391 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight (kg) | 21.5 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.00% | 22.00% | Typical | 6,580 | | Power density | 220.2 | 220.2 | Typical | 6,391 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 48.9 | 51.5 | Typical | 2,541 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Residential. ## Specification ### Electrical - **Rated power (Pmax):** 440 W - **Efficiency:** 22.00 % - **Voltage at Pmax (Vmp):** 28.97 V - **Current at Pmax (Imp):** 15.19 A - **Open-circuit voltage (Voc):** 35.29 V - **Short-circuit current (Isc):** 15.85 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:** 220.2 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:** 385 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6580 of 14129 | | Power density | 6391 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 2541 of 14129 | | Warranty | 21 of 14129 | ## About this series The Suntech Ultra V Pro mini (STPXXXS-H48-Nkh) series are compact modules designed to optimally utilize roof surfaces without compromising performance. Their key advantage lies in the **N-type TOPCon cell technology**, which ensures stable operation over time and better resilience under demanding operating conditions. The "mini" format facilitates adaptation to complex roof pitches - especially where conventional, larger panels hinder optimal string layouts and leave unused mounting areas. The H48-Nkh variant features a **dual-glass construction**, valued for its enhanced resistance to atmospheric factors and greater stiffness during installation. This is a tangible benefit for installers and investors seeking trouble-free operation for years to come. Additionally, the series offers **aesthetic appeal suitable for modern roofs** - a particularly attractive solution for single-family homes and premium projects. This is an excellent choice for those wishing to combine **high efficiency in a compact format** with predictable module performance, even in rooftop installations with limited load-bearing capacity and non-standard geometries. ## Notable figures - Efficiency of 22.0% matches the \*\*TOPCon 400-450W\*\* median - At 220.2 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 - In the top 47% for efficiency among all TOPCon panels ## Questions ### Are Suntech Ultra V Pro mini (STPXXXS-H48-Nkh) panels suitable for small or irregularly shaped roofs? Yes, this is the main advantage of this series. The 'mini' format was designed to better fit complex roof sections, dormers, and slopes, where standard larger panels would leave unused installation space. This allows more modules to be fitted, achieving higher installed capacity on limited roof area, which is especially valuable for single-family homes with non-standard roof geometry. ### What is N-type TOPCon cell technology in Suntech Ultra V Pro mini panels, and is it worth the extra cost? TOPCon (Tunnel Oxide Passivated Contact) is an N-type cell technology that reduces energy losses within the cell and helps the panel maintain higher efficiency throughout its lifespan. In practice, this means lower year-over-year power degradation compared to older P-type technologies, as well as more stable performance at high temperatures. For investors, this translates into higher real energy yield over a 20-30 year period, justifying the small price premium. ### What warranty comes with the Suntech Ultra V Pro mini H48-Nkh modules? The manufacturer offers a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. This means that even after 30 years of operation, the panel should still produce energy at the guaranteed level specified in the datasheet. Suntech is a Tier-1 manufacturer, which further increases the reliability of warranty service on the European market. ### How does the dual-glass construction of the H48-Nkh variant differ from standard glass-backsheet panels? Dual-glass construction means glass is used on both sides of the module instead of the typical glass-backsheet layup. This design increases mechanical rigidity, improves resistance to moisture, corrosion, and extreme weather conditions, and reduces the risk of microcracks during transport and installation. For installers, this means fewer warranty claims, and for investors, longer trouble-free operation of the system. ### How much energy can I get from a 455 Wp Suntech Ultra V Pro mini panel? A 455 Wp panel under typical Polish irradiance conditions (approximately 1000-1100 kWh/kWp per year) will generate roughly 450-500 kWh of energy annually, depending on tilt angle, orientation, and roof shading. Thanks to TOPCon technology, the panel maintains high efficiency even at higher temperatures, limiting output drops during hot summer days compared to older cell technologies. ### Are Suntech Ultra V Pro mini panels bifacial? No, the Ultra V Pro mini H48-Nkh series consists of monofacial panels, generating energy only from the front side of the module. This works well for standard roof-mounted installations, where the panel lies flat on the structure without access to reflected light from behind. For ground-mount installations or elevated racking systems with light access from below, a bifacial model from another Suntech series would be a better fit. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/61261578367db950515a45-771c64989385.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +50 W, cooler, +2.5 pp | | [Suntech STP-NT11/48QGSF-490](https://comparepv.com/panel/suntech-stp-nt11-48qgsf-490) | 490 W | +50 W, cooler, +2.5 pp | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +45 W, cooler, +2.3 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +45 W, cooler, +2.3 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +45 W, cooler, +2.3 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +45 W, cooler, +2.3 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 W | +45 W, cooler, +2.3 pp | | [Suntech STP430S-H48-Nfb](https://comparepv.com/panel/suntech-stp430s-h48-nfb) | 430 W | -10 W, -0.5 pp | | [Suntech STP435S-H48-Nfb](https://comparepv.com/panel/suntech-stp435s-h48-nfb) | 435 W | Very close match | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +70 W, cooler, +3.0 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +55 W, cooler, +2.8 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +65 W, cooler, +2.7 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +65 W, heavier, +2.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +60 W, cooler, +2.5 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +60 W, cooler, +2.5 pp | --- Source: https://comparepv.com/panel/suntech-stp440s-h48-nkh Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.