--- title: "Suntech STP700S-D66-Nsh+ 700W Solar Panel - Specs & Review | ComparePV" description: "Suntech STP700S-D66-Nsh+ 700W solar panel. Specs: 22.50% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/suntech-stp700s-d66-nsh" updated: 2026-09-11 --- # Suntech STP700S-D66-Nsh+ Middle of its segment, modest efficiency 420 panels in the segment TOPCon 700-750 W ## Identity - **Manufacturer:** Suntech - **Model:** STP700S-D66-Nsh+ - **Series:** Ultra X Pro Plus (STPXXXS-D66-Nsh+) - **Rated power:** 700 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 700-750 W (420 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 700 W | 715 W | Weak - bottom 7% | | | Module efficiency | 22.50% | 23.00% | Weak - bottom 5% | 4,222 | | Power density | 225.3 | 230.2 | Weak - bottom 7% | 3,989 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 37.5 kg | 38.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.50% | 23.00% | Weak - bottom 5% | 4,222 | | Power density | 225.3 | 230.2 | Weak - bottom 7% | 3,989 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 53.6 | 52.9 | Typical | 7,586 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **22.50% module efficiency** - Bottom 5% of the TOPCon 700-750 W segment, against a median of 23.00%. Ranked 4,222nd in the whole database. - **225.3 watts per square metre** - Bottom 7% of the TOPCon 700-750 W segment, against a median of 230.2. Ranked 3,989th in the whole database. - **Best for:** Utility-scale, commercial and hot-climate. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 700 W - **Efficiency:** 22.50 % - **Voltage at Pmax (Vmp):** 39.65 V - **Current at Pmax (Imp):** 17.66 A - **Open-circuit voltage (Voc):** 47.65 V - **Short-circuit current (Isc):** 18.67 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:** 132 - **Bifacial:** yes ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 37.5 kg - **Area:** 3.11 m2 - **Power density:** 225.3 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:** 612 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 4222 of 14005 | | Power density | 3989 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 7586 of 14005 | | Warranty | 21 of 14005 | ## About this series The Suntech Ultra X Pro Plus (STPXxxS-D66-Nsh+) series is designed for installations where maximizing energy yield from every meter of construction and stable operation in demanding conditions are paramount. The application of **N-type TOPCon cells** helps minimize losses over time and maintain high efficiency across seasons, directly translating into predictable energy production and a better project economics. Modules in the **bifacial version** can utilize reflected light from the ground, genuinely increasing yields where clear surfaces or appropriate stilt geometry can be planned. Another key feature is **low sensitivity to high temperatures**, which supports energy production on hot days when many competitive solutions significantly lose performance. For investors, the **long power warranty** is also crucial, facilitating risk and financing planning. This is an excellent choice for PV farms, large industrial rooftops, and projects aimed at reducing LCOE while increasing yield without expanding the surface area. ## Notable figures - Efficiency of 22.5% matches the \*\*TOPCon 700-750W\*\* median - At 225.3 W/m², this panel generates 4.9 W/m² less per unit area than \*\*TOPCon 700-750W\*\* median (230.2 W/m²) - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 700-750W\*\* median - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface - Ranked #4222 out of 14005 panels for efficiency in the database ## Questions ### What is the maximum power output of the Suntech Ultra X Pro Plus panel? The Ultra X Pro Plus series (STPXXXS-D66-Nsh+) reaches up to 710 Wp. This high per-module power output reduces the number of panels needed to reach a target system capacity, lowering costs for racking, cabling, and installation labor, especially in large utility-scale and industrial installations. ### How does the TOPCon cell technology in the Ultra X Pro Plus differ from standard PERC cells? N-type TOPCon cells feature an additional passivation layer that reduces carrier recombination and energy losses. As a result, Ultra X Pro Plus modules maintain higher efficiency over time and degrade more slowly than typical P-type PERC panels, translating into greater long-term energy yield over the system's operating life. ### Do the bifacial panels in the Ultra X Pro Plus series require special mounting? No special racking is required, but to make the most of the bifacial gain, it helps to install the panels above a light-colored or reflective surface, such as white gravel, a membrane roof, or grass, and to leave adequate clearance below the module. This allows the rear side to capture reflected light, boosting total system yield. ### How do Ultra X Pro Plus panels perform in high summer temperatures? The Ultra X Pro Plus series has a low temperature coefficient, meaning less power loss on hot days compared to many competing products. For installers and investors, this results in more stable and predictable energy production during summer, when panel heating is at its peak. ### What warranty comes with the Suntech Ultra X Pro Plus panels? The manufacturer offers a 15-year product warranty and a 30-year linear power output warranty. The long power warranty makes it easier for investors to plan return on investment and assess financing risk, since it guarantees a minimum level of energy output over most of the system's operating lifetime. ### Is Suntech a Tier 1 manufacturer, and where are Ultra X Pro Plus panels made? Yes, Suntech is classified as a Tier 1 manufacturer, reflecting financial stability and extensive experience in solar module production. The company is headquartered in China. Tier 1 status matters for project financing, as banks and insurers often require components from recognized manufacturers to approve loans for PV installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/stp700-720s-d66-nsh-en-6dcad0e69870.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | -50 W, lighter, +2.7 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +2.7 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +2.5 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, lighter, +2.5 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, lighter, +2.4 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -30 W, lighter, +2.3 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -30 W, lighter, +2.3 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -30 W, lighter, +2.3 pp | | [Suntech STP650S-D66/Pmh+](https://comparepv.com/panel/wuxi-suntech-power-co-ltd-stp650s-d66-pmh) | 650 W | -50 W, hotter, -1.6 pp | | [Suntech STP655S-D66/Wmh](https://comparepv.com/panel/suntech-stp655s-d66-wmh) | 655 W | Hotter, -1.4 pp, -5 yr warranty | | [Suntech STP660S-D66/Wmh](https://comparepv.com/panel/suntech-stp660s-d66-wmh) | 660 W | Hotter, -1.3 pp, -5 yr warranty | | [Suntech STP665S-D66/Wmh](https://comparepv.com/panel/suntech-stp665s-d66-wmh) | 665 W | Hotter, -1.1 pp, -5 yr warranty | | [Suntech STP670S-D66/Wmh](https://comparepv.com/panel/suntech-stp670s-d66-wmh) | 670 W | Hotter, -0.9 pp, -5 yr warranty | | [Suntech STP675S-D66/Wmh](https://comparepv.com/panel/suntech-stp675s-d66-wmh) | 675 W | Hotter, -0.8 pp, -5 yr warranty | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +105 W, cooler, +2.6 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +100 W, cooler, +2.4 pp | --- Source: https://comparepv.com/panel/suntech-stp700s-d66-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.