--- title: "Sunova TS-BBT78(615) 615W Solar Panel - Specs & Review | ComparePV" description: "Sunova TS-BBT78(615) 615W solar panel. Specs: 22.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/sunova-ts-bbt78-615" updated: 2026-09-11 --- # Sunova TS-BBT78(615) Light for its output, needs the roof space 359 panels in the segment N-type 600-650 W ## Identity - **Manufacturer:** Sunova - **Model:** TS-BBT78(615) - **Series:** TS-BBT78 - **Rated power:** 615 W - **Cell technology:** N-type - **Bifacial:** yes ## How it compares Compared against segment N-type 600-650 W (359 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 615 W | 625 W | Typical | | | Module efficiency | 22.00% | 22.77% | Weak - bottom 7% | 6,517 | | Power density | 220.0 | 227.7 | Weak - bottom 6% | 6,655 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 29.0 kg | 32.5 kg | Strong - top 18% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.00% | 22.77% | Weak - bottom 7% | 6,517 | | Power density | 220.0 | 227.7 | Weak - bottom 6% | 6,655 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 47.2 | 52.7 | Strong - top 18% | 1,520 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **47.2 kg per kWp** - Top 18% of the N-type 600-650 W segment, against a median of 52.7. ### Watch out for - **220.0 watts per square metre** - Bottom 6% of the N-type 600-650 W segment, against a median of 227.7. Ranked 6,655th in the whole database. - **22.00% module efficiency** - Bottom 7% of the N-type 600-650 W segment, against a median of 22.77%. Ranked 6,517th in the whole database. - **Best for:** Utility-scale, commercial and hot-climate. - **Not ideal for:** Roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 615 W - **Efficiency:** 22.00 % - **Voltage at Pmax (Vmp):** 47.24 V - **Current at Pmax (Imp):** 13.02 A - **Open-circuit voltage (Voc):** 55.79 V - **Short-circuit current (Isc):** 13.69 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:** N-type - **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:** 220.0 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:** 538 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 6517 of 14005 | | Power density | 6655 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 1520 of 14005 | | Warranty | 21 of 14005 | ## About this series The Sunova TS-BBT78 series consists of advanced modules based on **N-type TOPCon technology**, which redefine efficiency standards in utility-scale installations. Thanks to the use of **Bifacial Double Glass** design, these panels effectively utilize light reflected from the ground, significantly increasing the total energy yield compared to traditional monofacial solutions. A key differentiator is the minimization of LID degradation and an excellent temperature coefficient, which ensures the system maintains high efficiency even on hot days. It is an ideal choice for investors building solar farms and large commercial facilities where the lowest possible LCOE is crucial. The use of 78 cells in a larger format allows for the optimization of mounting structure and cabling costs, which directly translates to a faster return on investment. Unlike standard P-type modules, the TS-BBT78 series offers **higher resistance to aging effects** and a longer linear performance warranty. The robust double-glass construction effectively protects cells from micro-cracks and demanding weather conditions, ensuring failure-free operation for decades. By choosing these panels, you gain **maximum power density** from every square meter of surface, allowing for the full utilization of land or roof potential. ## Notable figures - Module efficiency of 22.0% is 0.8pp below average for \*\*N-type 600-650W\*\* panels (median: 22.8%) - 220.0 W/m² power density is 7.7 W/m² below \*\*N-type 600-650W\*\* median (227.7 W/m²) - requires larger installation area - Temperature coefficient of -0.29%/°C matches the \*\*N-type 600-650W\*\* median - 29.0 kg weight - 3.5 kg lighter than \*\*N-type 600-650W\*\* median (32.5 kg), reducing installation effort - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces ## Questions ### What is the maximum power output of Sunova TS-BBT78 panels? Panels from the Sunova TS-BBT78 series reach a maximum power output of up to 640 Wp. This high output comes from the use of 78 large-format N-type TOPCon cells, which deliver more energy per module and reduce mounting structure and cabling costs per installed kilowatt. ### How does bifacial technology in the Sunova TS-BBT78 differ from standard monofacial panels? TS-BBT78 bifacial panels use a Bifacial Double Glass construction, allowing the cells to capture additional light reflected from the ground, a light-colored roof, or gravel surfaces. This results in higher total energy yield from the same surface area compared to standard monofacial panels, especially on bright ground cover or ground-mounted PV farms. ### What warranty comes with Sunova TS-BBT78 panels? The manufacturer provides a 15-year product warranty along with a 30-year linear power output warranty. This means that after 30 years of operation the panel should still deliver a significant share of its initial power output, an important factor when calculating return on investment for large commercial installations. ### Does N-type TOPCon technology in the Sunova TS-BBT78 mean less cell degradation? Yes, N-type TOPCon cells are significantly less prone to LID degradation compared to older P-type cells. As a result, TS-BBT78 panels maintain higher efficiency throughout their operational life, with a slower power decline over time, translating into higher real-world energy yield in the long run. ### Are Sunova TS-BBT78 panels suitable for large-scale solar farms? Yes, the TS-BBT78 series is designed for utility-scale ground-mounted installations and large commercial projects. The large module format with 78 cells and unit power output of up to 640 Wp allow fewer panels to be used, simplify the mounting structure, and lower the overall LCOE of the installation. ### Is Sunova a Tier 1 manufacturer and where are TS-BBT78 panels made? Sunova is not currently listed as a Tier 1 manufacturer, though it is a China-based producer active in the PV module market. This is worth considering when assessing project financial risk, while the technical specifications of the TS-BBT78 series, such as TOPCon technology and bifacial construction, match current market standards for utility-scale installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/ts-bbt78-615-640-2bdfae2412e0.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +35 W, cooler, +3.2 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | +30 W, cooler, +3.0 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | +25 W, cooler, +2.8 pp | | [Longi Solar LR8-66HVD-665M](https://comparepv.com/panel/longi-lr8-66hvd-665m) | 665 W | +50 W, heavier, +2.6 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (665W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-665w-class) | 665 W | +50 W, heavier, +2.6 pp | | [Huayao HY665-B144DSS](https://comparepv.com/panel/huayao-hy665-b144dss) | 665 W | +50 W, cooler, +2.6 pp | | [Sunpro Power SPDG665-BC132R12](https://comparepv.com/panel/sunpro-spdg665-bc132r12) | 665 W | +50 W, heavier, +2.6 pp | | [Sunova TS-BW78(575)](https://comparepv.com/panel/sunova-ts-bw78-575) | 575 W | Hotter, -1.4 pp, -5 yr warranty | | [Sunova TS-BW78(580)](https://comparepv.com/panel/sunova-ts-bw78-580) | 580 W | Hotter, -1.3 pp, -5 yr warranty | | [Sunova TS-BW78(585)](https://comparepv.com/panel/sunova-ts-bw78-585) | 585 W | Hotter, -1.1 pp, -5 yr warranty | | [Sunova TS-BW78(590)](https://comparepv.com/panel/sunova-ts-bw78-590) | 590 W | Hotter, -0.9 pp, -5 yr warranty | | [Sunova TS-BW78(595)](https://comparepv.com/panel/sunova-ts-bw78-595) | 595 W | Hotter, -0.7 pp, -5 yr warranty | | [Sunova TS-BGT78(615)](https://comparepv.com/panel/sunova-ts-bgt78-615) | 615 W | Heavier | | [Sunova TS-BBT78(620)](https://comparepv.com/panel/sunova-ts-bbt78-620) | 620 W | Very close match | | [Sunova TS-BGT78(620)](https://comparepv.com/panel/sunova-ts-bgt78-620) | 620 W | Heavier | | [Sunova TS-BBT78(625)](https://comparepv.com/panel/sunova-ts-bbt78-625) | 625 W | +10 W, +0.4 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +65 W, cooler, +3.2 pp | --- Source: https://comparepv.com/panel/sunova-ts-bbt78-615 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.