--- title: "Suntech STP650S-H66-Nsh+ Solar Panel: Specs & Datasheet | ComparePV" description: "Suntech STP650S-H66-Nsh+ solar panel. Specs: 24.10% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/suntech-stp650s-h66-nsh" image: "https://comparepv.com/og/panel/suntech-stp650s-h66-nsh.png" updated: 2026-09-11 --- # Suntech STP650S-H66-Nsh+ Efficiency leader, no clear weak spot 254 panels in the segment TOPCon 650-700 W ## Identity - **Manufacturer:** Suntech - **Model:** STP650S-H66-Nsh+ - **Series:** Ultra V Pro 2.0 - **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 | 24.10% | 22.40% | Strong - top 17% | 241 | | Power density | 240.6 | 223.7 | Strong - top 20% | 255 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight (kg) | 32.5 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 | 24.10% | 22.40% | Strong - top 17% | 241 | | Power density | 240.6 | 223.7 | Strong - top 20% | 255 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 50.0 | 53.1 | Typical | 3,329 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **24.10% module efficiency** - Top 17% of the TOPCon 650-700 W segment, against a median of 22.40%. - **240.6 watts per square metre** - Top 20% of the TOPCon 650-700 W segment, against a median of 223.7. - **Best for:** Residential, commercial and utility-scale. ## Specification ### Electrical - **Rated power (Pmax):** 650 W - **Efficiency:** 24.10 % - **Voltage at Pmax (Vmp):** 41.80 V - **Current at Pmax (Imp):** 15.55 A - **Open-circuit voltage (Voc):** 50.30 V - **Short-circuit current (Isc):** 16.43 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:** 132 - **Bifacial:** yes ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.5 kg - **Area:** 2.70 m2 - **Power density:** 240.6 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 | 241 of 14129 | | Power density | 255 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 3329 of 14129 | | Warranty | 21 of 14129 | ## About this series The Suntech Ultra V Pro 2.0 series is a new generation of bifacial modules designed to squeeze maximum energy out of every square meter of roof or ground-mounted space. The panel is built on **half-cut N-type TOPCon cells** arranged in a transparent black bifacial design, allowing the rear side of the module to capture light reflected from the surrounding surface and boost real-world energy yield without expanding the installation footprint. The **multi-busbar technology** improves current collection and reduces resistive losses, translating into higher long-term reliability. The module also stands out for its strong **low-light performance**, generating power more efficiently than older-generation designs on cloudy days and during morning and evening hours, which matters in Poland's variable sunlight conditions. Its reinforced mechanical construction supports installation in locations exposed to heavy snow and wind loads. The manufacturer backs the series with a **30-year linear warranty** and low annual power degradation, making it an appealing choice both for investors in commercial installations and for homeowners seeking a durable solution with a stable return on investment over decades. ## Notable figures - Efficiency of 24.1% is 1.7pp above the \*\*TOPCon 650-700W\*\* median (22.4%) - 240.6 W/m² power density - 16.9 W/m² more than \*\*TOPCon 650-700W\*\* median (223.7 W/m²), more power per roof area - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 650-700W\*\* median - 32.5 kg weight - 2.1 kg lighter than \*\*TOPCon 650-700W\*\* median (34.6 kg), reducing installation effort - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### What warranty comes with the Suntech Ultra V Pro 2.0 solar panels? The Ultra V Pro 2.0 series comes with a 25-year product warranty and a 30-year linear power warranty, guaranteeing high cell performance over three decades of operation. As a Tier 1 manufacturer, Suntech offers financial stability that supports warranty claim fulfillment, while low annual power degradation ensures a predictable return on investment even after 25-30 years of use. ### What does bifacial mean for the Ultra V Pro 2.0, and is it worth it? The bifacial design lets the rear side of the module capture light reflected from the ground, roof, or bright surfaces, generating extra energy without increasing the installation footprint. Depending on the surrounding albedo, gains can range from a few to over ten percent more annual energy yield. It pays off especially on light-colored ground surfaces, flat roofs with gravel or membrane, and installations mounted higher above the surface. ### How does N-Type TOPCon technology in the Ultra V Pro 2.0 differ from older PERC cells? N-Type TOPCon cells have lower resistive losses and reduced light-induced degradation compared to older P-Type PERC cells, resulting in higher efficiency and longer module lifespan. In the Ultra V Pro 2.0, TOPCon combined with multi busbar technology improves current collection and long-term stability, allowing the panel to reach a maximum power output of up to 650 Wp while maintaining low annual degradation. ### Do Ultra V Pro 2.0 panels perform well on cloudy days and in low-light conditions? Yes, thanks to TOPCon technology the module delivers strong low-light performance, generating energy more efficiently than older-generation designs during mornings, evenings, and cloudy days. This is particularly relevant in Poland's climate, where much of the year features diffused light conditions, and better low-irradiance efficiency translates into higher real-world annual energy yield. ### Is the Ultra V Pro 2.0 suitable for installations exposed to heavy snow and strong wind? Yes, the module features a reinforced mechanical structure designed for locations subject to heavy snow loads and strong winds, making it suitable for both pitched roofs and ground-mounted installations in more demanding climate conditions. This high mechanical durability also supports the long-term parameter stability covered by the 30-year linear power warranty. ### How many Ultra V Pro 2.0 panels are needed for a 10 kWp installation? With a maximum power of 650 Wp per module, roughly 15-16 Ultra V Pro 2.0 panels are needed to reach a system size of about 10 kWp. The high per-unit power output means fewer panels are required to achieve the target system capacity, which shortens installation time and makes more efficient use of available roof or ground space. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/STP630-650S-H66-Nsh-38423a1346b0.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +1.1 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +30 W, lighter, +1.1 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | Cooler, lighter, +0.9 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +0.9 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +50 W, cooler, +0.9 pp | | [WINAICO WST-675BKX72-A2](https://comparepv.com/panel/winaico-wst-675bkx72-a2) | 675 W | +25 W, cooler, +0.9 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +45 W, cooler, +0.8 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | Cooler, lighter, +0.7 pp | | [Suntech STP605S-H66-Nsh+](https://comparepv.com/panel/wuxi-suntech-power-co-ltd-stp605s-h66-nsh) | 605 W | -45 W, -1.7 pp | | [Suntech STP610S-H66-Nsh+](https://comparepv.com/panel/wuxi-suntech-power-co-ltd-stp610s-h66-nsh) | 610 W | -40 W, -1.5 pp | | [Suntech STP615S-H66-Nsh+](https://comparepv.com/panel/wuxi-suntech-power-co-ltd-stp615s-h66-nsh) | 615 W | -35 W, -1.3 pp | | [Suntech STP620S-H66-Nsh+](https://comparepv.com/panel/wuxi-suntech-power-co-ltd-stp620s-h66-nsh) | 620 W | -30 W, -1.1 pp | | [Suntech STP625S-H66-Nsh+](https://comparepv.com/panel/wuxi-suntech-power-co-ltd-stp625s-h66-nsh) | 625 W | -25 W, -1.0 pp | | [Suntech STP630S-H66-Nsh+](https://comparepv.com/panel/suntech-stp630s-h66-nsh) | 630 W | -20 W, -0.8 pp | | [Suntech STP635S-H66-Nsh+](https://comparepv.com/panel/suntech-stp635s-h66-nsh) | 635 W | -15 W, -0.6 pp | | [Suntech STP640S-H66-Nsh+](https://comparepv.com/panel/suntech-stp640s-h66-nsh) | 640 W | -10 W, -0.4 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | Cooler, lighter, +0.7 pp | --- Source: https://comparepv.com/panel/suntech-stp650s-h66-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.