--- title: "Sunova TS-BWT66(705)-G12 705W Solar Panel - Specs & Review | ComparePV" description: "Sunova TS-BWT66(705)-G12 705W solar panel. Specs: 22.70% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunova-ts-bwt66-705-g12" updated: 2026-09-11 --- # Sunova TS-BWT66(705)-G12 Light for its output, needs the roof space 420 panels in the segment TOPCon 700-750 W ## Identity - **Manufacturer:** Sunova - **Model:** TS-BWT66(705)-G12 - **Series:** TS-BWT66-G12 - **Rated power:** 705 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) | 705 W | 715 W | Weak - bottom 22% | | | Module efficiency | 22.70% | 23.00% | Weak - bottom 23% | 3,307 | | Power density | 227.0 | 230.2 | Weak - bottom 21% | 3,361 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 33.9 kg | 38.0 kg | Strong - top 14% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.70% | 23.00% | Weak - bottom 23% | 3,307 | | Power density | 227.0 | 230.2 | Weak - bottom 21% | 3,361 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 48.1 | 52.9 | Strong - top 14% | 2,052 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **48.1 kg per kWp** - Top 14% of the TOPCon 700-750 W segment, against a median of 52.9. ### Watch out for - **227.0 watts per square metre** - Bottom 21% of the TOPCon 700-750 W segment, against a median of 230.2. - **22.70% module efficiency** - Bottom 23% of the TOPCon 700-750 W segment, against a median of 23.00%. - **Best for:** Utility-scale, commercial, cold-climate and hot-climate. - **Not ideal for:** Roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 705 W - **Efficiency:** 22.70 % - **Voltage at Pmax (Vmp):** 39.92 V - **Current at Pmax (Imp):** 17.66 A - **Open-circuit voltage (Voc):** 46.58 V - **Short-circuit current (Isc):** 18.80 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.280 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 13.50 ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 35 mm - **Weight:** 33.9 kg - **Area:** 3.11 m2 - **Power density:** 227.0 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:** 616 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 3307 of 14005 | | Power density | 3361 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 2052 of 14005 | | Warranty | 21 of 14005 | ## About this series The Sunova TS-BWT66-G12 series consists of modules designed to maximize energy yield from the same surface area - particularly in situations where every square meter of roof or ground space is valuable. The use of a **bifacial design** allows for the utilization of reflected light from the ground, which significantly improves energy production in ground-mounted systems, on flat roofs, and on light-colored surfaces. A key advantage is the **TOPCon N-type cell technology**, which minimizes losses and helps maintain high efficiency even in challenging operating conditions. In comparison to competitors, it stands out due to its **stable performance at high temperatures** and good efficiency even with reduced sunlight - which is important in the Polish climate, where cloudy days and variable conditions are the norm. The series is also designed for long-term profitability thanks to **extended power warranties**, which makes it easier to plan the return on investment. It is a good choice for PV farms, large commercial rooftops, and investors who want to extract more energy without expanding the size of their installations. ## Notable figures - At 22.7% efficiency, this panel is on par with typical \*\*TOPCon 700-750W\*\* modules - At 226.9 W/m², this panel generates 3.2 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 - Weight of 33.9 kg (4.1 kg below \*\*TOPCon 700-750W\*\* median of 38.0 kg) allows easier transport and roof mounting - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### Are Sunova TS-BWT66-G12 panels suitable for flat roofs? Yes, the bifacial design of this series works especially well on flat roofs, where modules are mounted at an angle that allows reflected light from a light-colored surface to reach the rear side of the panel. This can provide an additional energy yield without expanding the installation footprint, which matters when roof space is limited. ### What warranty applies to Sunova TS-BWT66-G12 panels? The manufacturer offers a 15-year product warranty and a 30-year power warranty, guaranteeing a minimum performance level over the module's lifetime. This warranty structure helps investors plan their return on investment and is consistent with what is expected from modern N-type modules. ### How does TOPCon cell technology differ from standard PERC cells? The N-type TOPCon cells used in the TS-BWT66-G12 series have lower recombination losses than traditional P-type PERC cells, resulting in higher efficiency and a smaller power drop at high temperatures. In practice this means more stable energy output in summer and better performance under low-irradiance conditions, such as cloudy days. ### What is the maximum power output of the TS-BWT66-G12 series? Modules in this series reach up to 720 Wp, placing them among high-power modules intended mainly for large-scale installations such as PV farms and extensive commercial or industrial rooftops. A higher per-module power output reduces the number of panels needed to reach a target system capacity. ### Do Sunova bifacial panels require special mounting? To fully utilize bifacial technology, modules are best mounted on structures that allow light to reach the rear side, such as elevated ground-mount racking or light-colored reflective roof surfaces. Standard mounting on a typical sloped roof is also possible, though the dual-sided energy gain will be more limited in that case. ### Is Sunova a Tier 1 manufacturer? Sunova, headquartered in China, is not currently listed among Tier 1 manufacturers, which is worth considering when assessing project financing risk, for example when applying for a loan or lease. This does not directly affect the module's technical specifications or the terms of the product and power warranty. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/thornova-ts-bwt66-695-720-g12-v2024-3-15-1d42ff1cf194.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | Cooler, lighter, +2.5 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -30 W, lighter, +2.3 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, +2.3 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | -10 W, cooler, +2.2 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -35 W, lighter, +2.1 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -35 W, lighter, +2.1 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -35 W, cooler, +2.1 pp | | [Sunova RS645~665S9B-132 (645W)](https://comparepv.com/panel/thornova-rs645-665s9b-132-645w) | 645 W | -60 W, hotter, -1.9 pp | | [Sunova RS645~665S9B-132 (650W)](https://comparepv.com/panel/thornova-rs645-665s9b-132-650w) | 650 W | -55 W, hotter, -1.8 pp | | [Sunova RS645~665S9B-132 (655W)](https://comparepv.com/panel/thornova-rs645-665s9b-132-655w) | 655 W | -50 W, hotter, -1.6 pp | | [Sunova RS645~665S9B-132 (660W)](https://comparepv.com/panel/thornova-rs645-665s9b-132-660w) | 660 W | Hotter, -1.5 pp, -5 yr warranty | | [Sunova RS645~665S9B-132 (665W)](https://comparepv.com/panel/thornova-rs645-665s9b-132-665w) | 665 W | Hotter, -1.3 pp, -5 yr warranty | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +100 W, heavier, +2.4 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +95 W, heavier, +2.2 pp | | [AIKO AIKO-A795-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a795-grh78dw) | 795 W | +90 W, heavier, +2.1 pp | | [AIKO AIKO-A790-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a790-grh78dw) | 790 W | +85 W, heavier, +1.9 pp | --- Source: https://comparepv.com/panel/sunova-ts-bwt66-705-g12 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.