--- title: "Sunova TS-BW66(495) 495W Solar Panel - Specs & Review | ComparePV" description: "Sunova TS-BW66(495) 495W solar panel. Specs: 20.90% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunova-ts-bw66-495" updated: 2026-09-11 --- # Sunova TS-BW66(495) Strong in heat, no clear weak spot 449 panels in the segment PERC 450-500 W ## Identity - **Manufacturer:** Sunova - **Model:** TS-BW66(495) - **Series:** TS-BW66 - **Rated power:** 495 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 450-500 W (449 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 495 W | 460 W | Strong - top 5% | | | Module efficiency | 20.90% | 20.82% | Typical | 10,072 | | Power density | 208.5 | 208.5 | Typical | 10,410 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 8% | 8,545 | | Weight (kg) | 25.3 kg | 24.5 kg | Typical | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 20.90% | 20.82% | Typical | 10,072 | | Power density | 208.5 | 208.5 | Typical | 10,410 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 8% | 8,545 | | Weight per kWp | 51.1 | 53.1 | Typical | 4,467 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **-0.330 %/°C temperature coefficient** - Top 8% of the PERC 450-500 W segment, against a median of -0.350. Ranked 8,545th in the whole database. - **Best for:** Commercial. ## Specification ### Electrical - **Rated power (Pmax):** 495 W - **Efficiency:** 20.90 % - **Voltage at Pmax (Vmp):** 37.34 V - **Current at Pmax (Imp):** 13.26 A - **Open-circuit voltage (Voc):** 45.34 V - **Short-circuit current (Isc):** 13.78 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.330 %/degC - **Temperature coefficient of Voc:** -0.260 %/degC - **Temperature coefficient of Isc:** 0.060 %/degC - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 132 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2094 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 25.3 kg - **Area:** 2.37 m2 - **Power density:** 208.5 Wp/m2 ### Warranty and degradation - **Product warranty:** 15 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 406 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 10072 of 14005 | | Power density | 10410 of 14005 | | Temperature coefficient | 8545 of 14005 | | Weight | 4467 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Sunova TS-BW66 series is designed for high energy production where every square meter of roof or ground space counts. The use of a **bifacial** construction allows not only for the use of direct sunlight, but also of reflected radiation from the ground, which significantly improves performance compared to typical monofacial modules. In practice, TS-BW66 performs well in installations where occasional dirt and less ideal operating conditions occur - this is supported by **PERC technology**, which is designed to better capture light and operate more stably in low-light conditions. This is a good choice for investors who want to combine **high power density** with sensible profitability: on the roofs of warehouses and service buildings, in PV farms, and in projects where the back of the module can be "illuminated" (clear ground, proper mounting). The series also features a **robust glass-to-glass** construction, which increases resistance to moisture and material fatigue, which is important in the Polish climate. This makes TS-BW66 a reasonable alternative to more expensive N-type solutions when durability and performance are the priority, rather than just specifications on paper. ## Notable figures - Efficiency of 20.9% matches the \*\*PERC 450-500W\*\* median - At 208.5 W/m² power density, roof space requirements are typical for \*\*PERC 450-500W\*\* panels - At -0.33%/°C, hot weather performance is typical for \*\*PERC 450-500W\*\* panels - Bifacial design (70% factor) captures reflected light - adds 4-10% yield on ground-mount or white roof - Ranked #10072 out of 14005 panels for efficiency in the database ## Questions ### Is the Sunova TS-BW66 series still available for purchase? Production of the TS-BW66 series has been discontinued by the manufacturer and the module is no longer actively manufactured. Units can still be found in distributor stock or clearance offers, but for larger projects it's worth confirming availability with the seller in advance and considering currently produced equivalents within the same series. ### How does bifacial technology in the TS-BW66 differ from standard panels? The TS-BW66 has active cells on both sides, so besides direct sunlight it also captures light reflected off the ground or surrounding surface. This means that with a bright ground surface, a white roof membrane, or ground-mounted installations, energy yield can be higher than with a comparable-rated monofacial module. ### What warranty comes with the Sunova TS-BW66 panels? The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 25-year power performance warranty. This is a standard level for PERC panels in this segment, though shorter than what's now offered on the newest N-type modules, where warranties can reach up to 30 years. ### Do TS-BW66 panels perform well under partial soiling or shading? The PERC cell technology used in the TS-BW66 improves light capture and keeps output more stable under weaker irradiance, which helps with periodic soiling, dust, or grime. It doesn't eliminate the effects of persistent partial shading, though, so roofs with chimneys or dormers still need careful string layout planning. ### What is the maximum power output of the TS-BW66, and what installations suit it best? The module reaches up to 510 Wp, and combined with its bifacial, glass-glass construction it's well suited to rooftops on commercial and industrial buildings, as well as PV farms where high power density per square meter matters. It performs especially well where the rear side of the panel can receive reflected light. ### Does the glass-glass construction in the TS-BW66 improve durability in a temperate climate? Yes, glass-glass construction instead of a typical backsheet laminate increases resistance to moisture ingress, UV degradation, and material fatigue under temperature swings. In climates with frequent freeze-thaw cycles, this translates into longer service life and more stable output throughout the warranty period. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ts-bw66-490-510-571904509376.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +4.1 pp, +5 yr warranty | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, +3.9 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, +3.8 pp, +5 yr warranty | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, +3.6 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, +3.6 pp, +5 yr warranty | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, +3.6 pp, +5 yr warranty | | [Sunova RS480~500S8-132GA-480](https://comparepv.com/panel/thornova-rs480-500s8-132ga-480) | 480 W | Heavier, -0.7 pp, +5 yr warranty | | [Sunova RS480~500S8-132GA-485](https://comparepv.com/panel/thornova-rs480-500s8-132ga-485) | 485 W | Heavier, -0.5 pp, +5 yr warranty | | [Sunova TS-BB66(490)](https://comparepv.com/panel/sunova-ts-bb66-490) | 490 W | -0.3 pp | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +95 W, +2.9 pp, +5 yr warranty | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +90 W, +2.7 pp, +5 yr warranty | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +85 W, +2.6 pp, +5 yr warranty | | [Gamko New Energy GKA120N-PRO-580W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-580w) | 580 W | +85 W, +2.5 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/sunova-ts-bw66-495 Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.