--- title: "Sunova TS-BW78(595) 595W Solar Panel - Specs & Review | ComparePV" description: "Sunova TS-BW78(595) 595W solar panel. Specs: 21.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunova-ts-bw78-595" updated: 2026-09-11 --- # Sunova TS-BW78(595) Strong in heat, short guarantee 589 panels in the segment PERC 550-600 W ## Identity - **Manufacturer:** Sunova - **Model:** TS-BW78(595) - **Series:** TS-BW78 - **Rated power:** 595 W - **Cell technology:** PERC - **Bifacial:** yes ## How it compares Compared against segment PERC 550-600 W (589 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 595 W | 560 W | Strong - top 6% | | | Module efficiency | 21.30% | 21.29% | Typical | 8,519 | | Power density | 212.9 | 212.9 | Typical | 8,601 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 7% | 8,545 | | Weight (kg) | 29.0 kg | 30.8 kg | Strong - top 10% | | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.30% | 21.29% | Typical | 8,519 | | Power density | 212.9 | 212.9 | Typical | 8,601 | | Temperature coefficient | -0.330 | -0.350 | Strong - top 7% | 8,545 | | Weight per kWp | 48.7 | 52.7 | Strong - top 10% | 2,437 | | Performance warranty | 25 yrs | 27 yrs | Weak - bottom 24% | 9,798 | ### Strengths - **-0.330 %/°C temperature coefficient** - Top 7% of the PERC 550-600 W segment, against a median of -0.350. Ranked 8,545th in the whole database. - **48.7 kg per kWp** - Top 10% of the PERC 550-600 W segment, against a median of 52.7. ### Watch out for - **25 year performance warranty** - Bottom 24% of the PERC 550-600 W segment, against a median of 27 yrs. - **Best for:** Commercial and utility-scale. - **Not ideal for:** Owners who want a long output guarantee. ## Specification ### Electrical - **Rated power (Pmax):** 595 W - **Efficiency:** 21.30 % - **Voltage at Pmax (Vmp):** 44.57 V - **Current at Pmax (Imp):** 13.35 A - **Open-circuit voltage (Voc):** 53.84 V - **Short-circuit current (Isc):** 14.04 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:** 156 - **Bifacial:** yes - **Bifacial gain:** 25.00 ### Physical - **Length:** 2465 mm - **Width:** 1134 mm - **Thickness:** 35 mm - **Weight:** 29.0 kg - **Area:** 2.80 m2 - **Power density:** 212.9 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:** 488 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8519 of 14005 | | Power density | 8601 of 14005 | | Temperature coefficient | 8545 of 14005 | | Weight | 2437 of 14005 | | Warranty | 9798 of 14005 | ## About this series The Sunova TS-BW78 series is designed for installations where maximizing energy production from a given area and stable performance in demanding conditions are crucial. These are modules with a design focused on real-world results - thanks to **bifacial technology**, they can utilize reflected light from the ground, which improves profitability, especially on roofs with light-colored surfaces and in large ground-mounted installations. The use of cell architecture supports **better performance in hot weather** and reduces power losses during the season, which will be appreciated by investors expecting predictable production results. The series also features **positive power tolerance**, which makes it easier to design installations without the risk that the modules will not meet their performance specifications in practice. The TS-BW78 is a good choice for PV farms, commercial and industrial facilities, and projects where **lower BOS (Balance of System) costs** are important - fewer modules and mounting components for the same power output. Compared to the competition, the series stands out with a pragmatic approach: emphasis on performance, durability, and predictability rather than marketing promises. ## Notable figures - At 21.3% efficiency, this panel is on par with typical \*\*PERC 550-600W\*\* modules - At 212.9 W/m² power density, roof space requirements are typical for \*\*PERC 550-600W\*\* panels - At -0.33%/°C, hot weather performance is typical for \*\*PERC 550-600W\*\* panels - At 29.0 kg, this panel is 1.8 kg lighter than \*\*PERC 550-600W\*\* median (30.8 kg) - easier handling during installation - Bifaciality factor of 70% can add 4-10% extra yield with reflective mounting surface ## Questions ### Are Sunova TS-BW78 panels suitable for large ground-mounted PV farms? Yes, this is one of the series' main use cases. Thanks to bifacial technology, TS-BW78 modules capture additional light reflected from the ground, gravel, or light-colored surfaces beneath the racking, meaningfully boosting energy yield without increasing the footprint. Combined with power up to 595 Wp, this allows fewer modules and mounting components per installed watt, lowering BOS costs in utility-scale and commercial projects. ### What warranty comes with the Sunova TS-BW78 series? The TS-BW78 series carries a 15-year product warranty and a 25-year power output warranty. This means the manufacturer commits to repairing or replacing a defective module for 15 years, while guaranteeing a specified level of energy production over 25 years. These terms are in line with current industry standards for panels in this class. ### How does the PERC technology in TS-BW78 compare to newer TOPCon cells? PERC is a mature, well-proven cell technology, cheaper to manufacture than TOPCon but with slightly lower efficiency and weaker high-temperature performance. TS-BW78 offsets this with a cell architecture optimized for hot climates and bifacial technology, improving actual energy yield. For buyers looking for a proven, predictable option at a reasonable price, PERC remains a solid choice. ### Do TS-BW78 panels perform well in hot summer conditions? Yes, this is one of the series' strengths. The cell architecture reduces power losses at high module temperatures, which matters in summer when roof- or ground-mounted panels can heat up to several dozen degrees Celsius. As a result, energy production on hot days is more stable and predictable than with standard-construction modules. ### What is positive power tolerance in TS-BW78 and why does it matter when buying? Positive power tolerance means the module's actual power output is never lower than the rated value on the label, and is often slightly higher. For an investor, this guarantees that a system design based on the declared 595 Wp rating will actually reach expected parameters in the field, without the risk of underestimated energy production and return on investment. ### Is Sunova a tier 1 manufacturer, and does that matter for choosing TS-BW78? Sunova is not currently listed as a tier 1 manufacturer, a financial classification tied to production scale and financing methods rather than a direct measure of panel quality. When choosing panels, it's more useful to focus on actual technical specs, warranty length, and track record of installations than on tier 1 status alone, though some institutional investors still treat it as an additional financing risk criterion. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ts-bw78-575-595-504ed07c2f01.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +50 W, cooler, +3.7 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | Cooler, +3.5 pp, +5 yr warranty | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, +3.5 pp, +5 yr warranty | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | Cooler, +3.3 pp, +5 yr warranty | | [AIKO AIKO-A635-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a635-mae72mw) | 635 W | Cooler, +3.3 pp, +5 yr warranty | | [Sunova TS-BW78(575)](https://comparepv.com/panel/sunova-ts-bw78-575) | 575 W | -20 W, -0.7 pp | | [Sunova TS-BW78(580)](https://comparepv.com/panel/sunova-ts-bw78-580) | 580 W | -15 W, -0.6 pp | | [Sunova TS-BW78(585)](https://comparepv.com/panel/sunova-ts-bw78-585) | 585 W | -10 W, -0.4 pp | | [Sunova TS-BW78(590)](https://comparepv.com/panel/sunova-ts-bw78-590) | 590 W | Very close match | | [Sunova TS-BBT78(615)](https://comparepv.com/panel/sunova-ts-bbt78-615) | 615 W | Cooler, +0.7 pp, +5 yr warranty | | [Sunova TS-BGT78(615)](https://comparepv.com/panel/sunova-ts-bgt78-615) | 615 W | Cooler, heavier, +5 yr warranty | | [Sunova TS-BBT78(620)](https://comparepv.com/panel/sunova-ts-bbt78-620) | 620 W | Cooler, +0.9 pp, +5 yr warranty | | [Sunova TS-BGT78(620)](https://comparepv.com/panel/sunova-ts-bgt78-620) | 620 W | Heavier, +0.9 pp, +5 yr warranty | | [Sunova TS-BBT78(625)](https://comparepv.com/panel/sunova-ts-bbt78-625) | 625 W | Cooler, +1.1 pp, +5 yr warranty | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +85 W, cooler, +3.9 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +80 W, cooler, +3.7 pp | --- Source: https://comparepv.com/panel/sunova-ts-bw78-595 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.