--- title: "Suntech STP650S-C78/Nsh+ Solar Panel: Specs & Datasheet | ComparePV" description: "Suntech STP650S-C78/Nsh+ solar panel. Specs: 23.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/suntech-stp650s-c78-nsh" image: "https://comparepv.com/og/panel/suntech-stp650s-c78-nsh.png" updated: 2026-09-11 --- # Suntech STP650S-C78/Nsh+ Solid all-round for its segment 254 panels in the segment TOPCon 650-700 W ## Identity - **Manufacturer:** Suntech - **Model:** STP650S-C78/Nsh+ - **Series:** Ultra T - **Rated power:** 650 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 650-700 W (254 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 650 W | 665 W | Weak - bottom 13% | | | Module efficiency | 23.30% | 22.40% | Typical | 1,057 | | Power density | 232.5 | 223.7 | Typical | 1,265 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight (kg) | 34.7 kg | 34.6 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.30% | 22.40% | Typical | 1,057 | | Power density | 232.5 | 223.7 | Typical | 1,265 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 53.4 | 53.1 | Typical | 7,351 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Utility-scale, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 650 W - **Efficiency:** 23.30 % - **Voltage at Pmax (Vmp):** 46.36 V - **Current at Pmax (Imp):** 14.04 A - **Open-circuit voltage (Voc):** 56.48 V - **Short-circuit current (Isc):** 14.68 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 ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 156 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 34.7 kg - **Area:** 2.80 m2 - **Power density:** 232.5 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:** 568 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1057 of 14129 | | Power density | 1265 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 7351 of 14129 | | Warranty | 21 of 14129 | ## About this series The Suntech Ultra T 1.0 series is a photovoltaic module lineup engineered for investors seeking maximum energy yield from limited installation space. The panels use **N-type TOPCon half-cut cells**, delivering higher conversion efficiency and reduced power losses from shading effects and resistance. Thanks to **multi busbar technology**, current collection and optical utilization across the cell surface are improved, resulting in more stable energy output across varying irradiance conditions. Ultra T 1.0 modules are **bifacial, double-glass panels**, generating additional energy from reflected light hitting the rear side - a solution particularly attractive for utility-scale solar farms and installations on bright, reflective surfaces, where it meaningfully lowers the project's LCOE. The series also stands out for its **very low power degradation**, achieved through zero LID and reduced LeTID and PID effects, ensuring stable energy production over decades. The reinforced aluminum frame construction provides **high resistance to mechanical loads** from snow and wind, making this series a solid choice for both rooftop and ground-mounted installations in demanding climate conditions. ## Notable figures - 23.3% module efficiency - 0.9pp better than the \*\*TOPCon 650-700W\*\* median of 22.4% - Power density of 232.5 W/m² packs 8.8 W/m² more into the same footprint vs \*\*TOPCon 650-700W\*\* median (223.7 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 650-700W\*\* median - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces - Ranked #1057 out of 14129 panels for efficiency in the database ## Questions ### How much extra power does the bifacial design of Suntech Ultra T panels actually add? Ultra T panels use N-type TOPCon cells with a bifaciality factor of up to 85%, significantly higher than conventional PERC modules. This means the rear side, thanks to light reflected off the roof, gravel, or bright ground surfaces, can generate an additional few to over ten percent of energy above the 650 Wp front-side nominal rating. The actual gain depends on ground albedo and mounting height above the surface. ### What warranty does Suntech offer on the Ultra T series and what does it cover? Suntech provides a 15-year product warranty covering material and workmanship defects, plus a 30-year power output warranty guaranteeing a defined percentage of initial power over the module's lifetime. This long power warranty is possible thanks to the elimination of LID and reduced LeTID and PID degradation in the TOPCon cells, resulting in more stable energy yield throughout the system's lifetime. ### How does TOPCon technology in Ultra T differ from standard PERC panels? N-type TOPCon cells used in the Ultra T series have higher conversion efficiency than traditional PERC cells and lower power losses related to the temperature coefficient, meaning better performance during hot summer conditions when module temperature rises. Additionally, N-type technology is less prone to light-induced degradation, so Ultra T panels retain higher power output over the long term compared to equivalent PERC models from the same manufacturer. ### Are Suntech Ultra T panels suited for solar farms or better for residential rooftops? The glass-glass construction and bifacial design of Ultra T modules make the series particularly attractive for ground-mounted installations and solar farms on bright, reflective surfaces, where the extra rear-side yield meaningfully lowers the levelized cost of energy (LCOE). The reinforced aluminum frame with high snow and wind load resistance also makes these panels suitable for sloped and flat roofs on residential and commercial buildings in demanding climates. ### Does Suntech's manufacturer status guarantee long-term reliability for an Ultra T investment? Suntech is a Tier 1 manufacturer headquartered in China, active in the PV market for over two decades and ranked among the largest global solar module suppliers. Tier 1 status reflects financial stability and continuity of production, which matters for honoring long-term warranties, including the 30-year power warranty offered on the Ultra T series, reducing the risk of warranty service issues down the line. ### How many 650 Wp Ultra T panels are needed for a 10 kWp installation? With a unit power of 650 Wp, roughly 15-16 Ultra T panels are needed to reach a 10 kWp system size. Thanks to the high per-panel output, the target system capacity can be achieved with fewer modules than with older, lower-power panels, reducing the number of mounting brackets required and shortening rooftop installation time. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/STP630-650S-C78-Nsh-33900491bea8.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +1.9 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +30 W, lighter, +1.9 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +50 W, cooler, +1.7 pp | | [WINAICO WST-675BKX72-A2](https://comparepv.com/panel/winaico-wst-675bkx72-a2) | 675 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +45 W, cooler, +1.6 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +1.5 pp | | [Suntech STP570S-C78/Pmh+](https://comparepv.com/panel/suntech-stp570s-c78-pmh) | 570 W | -80 W, hotter, -2.9 pp | | [Suntech STP570S-C78/Pmhg](https://comparepv.com/panel/suntech-stp570s-c78-pmhg) | 570 W | -80 W, hotter, -2.9 pp | | [Suntech STP575S-C78/Pmh+](https://comparepv.com/panel/suntech-stp575s-c78-pmh) | 575 W | -75 W, hotter, -2.7 pp | | [Suntech STP575S-C78/Pmhg](https://comparepv.com/panel/suntech-stp575s-c78-pmhg) | 575 W | -75 W, hotter, -2.7 pp | | [Suntech STP580S-C78/Pmh+](https://comparepv.com/panel/suntech-stp580s-c78-pmh) | 580 W | -70 W, hotter, -2.6 pp | | [Suntech STP580S-C78/Pmhg](https://comparepv.com/panel/suntech-stp580s-c78-pmhg) | 580 W | -70 W, hotter, -2.5 pp | | [Suntech STP585S-C78/Pmh+](https://comparepv.com/panel/wuxi-suntech-power-co-ltd-stp585s-c78-pmh) | 585 W | -65 W, hotter, -2.4 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | Cooler, lighter, +1.5 pp | --- Source: https://comparepv.com/panel/suntech-stp650s-c78-nsh 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.