--- title: "Sunova TS-BB66(505) 505W Solar Panel - Specs & Review | ComparePV" description: "Sunova TS-BB66(505) 505W solar panel. Specs: 21.27% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunova-ts-bb66-505" updated: 2026-09-11 --- # Sunova TS-BB66(505) Space saver, short guarantee 706 panels in the segment PERC 500-550 W ## Identity - **Manufacturer:** Sunova - **Model:** TS-BB66(505) - **Series:** TS-BB66 All Black - **Rated power:** 505 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 500-550 W (706 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 505 W | 535 W | Weak - bottom 11% | | | Module efficiency | 21.27% | 20.90% | Strong - top 7% | 8,849 | | Power density | 212.7 | 209.0 | Strong - top 6% | 8,757 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 8% | 8,545 | | Weight (kg) | 25.3 kg | 28.4 kg | Strong - top 18% | | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 23% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.27% | 20.90% | Strong - top 7% | 8,849 | | Power density | 212.7 | 209.0 | Strong - top 6% | 8,757 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 8% | 8,545 | | Weight per kWp | 50.1 | 53.0 | Strong - top 18% | 3,601 | | Performance warranty | 25 yrs | 30 yrs | Weak - bottom 23% | 9,798 | ### Strengths - **212.7 watts per square metre** - Top 6% of the PERC 500-550 W segment, against a median of 209.0. Ranked 8,757th in the whole database. - **21.27% module efficiency** - Top 7% of the PERC 500-550 W segment, against a median of 20.90%. Ranked 8,849th in the whole database. - **-0.330 %/°C temperature coefficient** - Top 8% of the PERC 500-550 W segment, against a median of -0.350. Ranked 8,545th in the whole database. ### Watch out for - **25 year performance warranty** - Bottom 23% of the PERC 500-550 W segment, against a median of 30 yrs. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 505 W - **Efficiency:** 21.27 % - **Voltage at Pmax (Vmp):** 37.53 V - **Current at Pmax (Imp):** 13.46 A - **Open-circuit voltage (Voc):** 45.54 V - **Short-circuit current (Isc):** 13.95 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:** 212.7 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:** 414 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8849 of 14005 | | Power density | 8757 of 14005 | | Temperature coefficient | 8545 of 14005 | | Weight | 3601 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Sunova TS-BB66 All Black series are bifacial modules in a black-on-black style, designed to combine high energy production with an elegant rooftop appearance. Thanks to the **bifacial design**, the panel can also utilize reflected light from the ground, which significantly improves energy yield in situations where every additional kilowatt-hour counts - on bright, flat roofs, ground-mounted structures, or carports. The use of **half-cut cells** reduces losses under partial shading and improves performance in less ideal conditions, such as around chimneys, skylights, or in roofs with more complex geometries. Furthermore, the **bifacial PERC** technology supports stable module operation over a wide range of solar irradiance. This is a proposal for investors who want both aesthetics and functionality - from single-family homes to commercial buildings. The TS-BB66 stands out from the competition with its **all-black bifacial version**, which offers a rare combination of design and additional energy generation. ## Notable figures - Efficiency of 21.3% matches the \*\*PERC 500-550W\*\* median - 212.7 W/m² power density - 3.7 W/m² more than \*\*PERC 500-550W\*\* median (209.0 W/m²), more power per roof area - Temperature coefficient of -0.33%/°C matches the \*\*PERC 500-550W\*\* median - At 25.3 kg, this panel is 3.1 kg lighter than \*\*PERC 500-550W\*\* median (28.4 kg) - easier handling during installation - 70% bifaciality enables rear-side power generation, boosting yield by 4-10% on reflective surfaces ## Questions ### Is the Sunova TS-BB66 All Black series still available for purchase? The TS-BB66 All Black series has been discontinued by Sunova. Remaining warehouse stock may still be available through distributors, but the manufacturer has no plans to resume production. For larger installations, it's worth confirming upfront that enough panels from the same production batch are available to avoid mismatches in appearance and performance. ### What's the difference between the bifacial TS-BB66 All Black and a standard monofacial panel? Thanks to its dual-sided design, the TS-BB66 captures direct sunlight on the front and reflected irradiance on the rear, off the surface beneath the panel. This extra yield is most noticeable on light-colored flat roofs, ground-mount structures, and carports with sufficient clearance and ground albedo. On a typical dark pitched roof, the bifacial gain is much smaller than in ground-mount installations. ### What is the maximum power output of the Sunova TS-BB66 All Black module? Modules in the TS-BB66 All Black series reach up to 505 Wp. This is typical for modern half-cut PERC panels, offering a solid power-to-area ratio while keeping the uniform all-black aesthetic. ### What warranty comes with the Sunova TS-BB66 All Black panels? The manufacturer provides a 15-year product warranty and a 25-year power performance warranty. Since the series has been discontinued and Sunova is a China-based non-Tier-1 manufacturer, it's worth checking with your local distributor who actually handles warranty claims and for how long this will remain possible. ### Do half-cut cells in the TS-BB66 All Black really help with partial shading? Yes, splitting cells into halves reduces power loss when only part of the panel is shaded, for example by a chimney, dormer, or neighboring structure. Current in the shaded half-cell drops independently of the rest of the module, so the whole panel loses less power than it would with traditional full-size cells. ### Are the TS-BB66 All Black panels suitable for both residential and commercial installations? Yes, the series was designed for both use cases. The all-black aesthetic works well on single-family home roofs, while the bifacial design and up to 505 Wp power add value in larger commercial installations, especially on flat roofs or ground-mount structures where the bifacial effect performs best. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/thornova-ts-bb66-490-505-all-black-4f27d3ea957b.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | Cooler, +3.7 pp, +5 yr warranty | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | Cooler, +3.4 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +50 W, cooler, +3.3 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, +3.2 pp, +5 yr warranty | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | Cooler, +3.2 pp, +5 yr warranty | | [Sunova RS480~500S8-132GA-480](https://comparepv.com/panel/thornova-rs480-500s8-132ga-480) | 480 W | Heavier, -1.1 pp, +5 yr warranty | | [Sunova RS480~500S8-132GA-485](https://comparepv.com/panel/thornova-rs480-500s8-132ga-485) | 485 W | Heavier, -0.9 pp, +5 yr warranty | | [Sunova TS-BB66(490)](https://comparepv.com/panel/sunova-ts-bb66-490) | 490 W | -15 W, -0.6 pp | | [Sunova TS-BB66(495)](https://comparepv.com/panel/sunova-ts-bb66-495) | 495 W | -10 W, -0.4 pp | | [Gamko New Energy GKA120N-PRO-590W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-590w) | 590 W | +85 W, +2.6 pp, +5 yr warranty | | [Gamko New Energy GKA120N-PRO-585W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-585w) | 585 W | +80 W, +2.4 pp, +5 yr warranty | | [Bisol BGO 580](https://comparepv.com/panel/bisol-bgo-580) | 580 W | +75 W, +2.2 pp, +5 yr warranty | | [Gamko New Energy GKA120N-PRO-580W](https://comparepv.com/panel/gamko-new-energy-gka120n-pro-580w) | 580 W | +75 W, +2.2 pp, +5 yr warranty | --- Source: https://comparepv.com/panel/sunova-ts-bb66-505 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.