--- title: "Trina Solar TSM-NEG21C.20-715 715W Solar Panel - Specs & Review | ComparePV" description: "Trina Solar TSM-NEG21C.20-715 715W solar panel. Specs: 23.00% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg21c-20-715" updated: 2026-09-11 --- # Trina Solar TSM-NEG21C.20-715 Solid all-round for its segment 420 panels in the segment TOPCon 700-750 W ## Identity - **Manufacturer:** Trina Solar - **Model:** TSM-NEG21C.20-715 - **Series:** Vertex N (TSM-NEG21C.20 715-740W) - **Rated power:** 715 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) | 715 W | 715 W | Typical | | | Module efficiency | 23.00% | 23.00% | Typical | 1,919 | | Power density | 230.2 | 230.2 | Typical | 2,018 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 38.3 kg | 38.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.00% | 23.00% | Typical | 1,919 | | Power density | 230.2 | 230.2 | Typical | 2,018 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 53.6 | 52.9 | Typical | 7,566 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Utility-scale, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 715 W - **Efficiency:** 23.00 % - **Voltage at Pmax (Vmp):** 41.10 V - **Current at Pmax (Imp):** 17.40 A - **Open-circuit voltage (Voc):** 49.20 V - **Short-circuit current (Isc):** 18.44 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes ### Physical - **Length:** 2384 mm - **Width:** 1303 mm - **Thickness:** 33 mm - **Weight:** 38.3 kg - **Area:** 3.11 m2 - **Power density:** 230.2 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 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:** 625 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1919 of 14005 | | Power density | 2018 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 7566 of 14005 | | Warranty | 21 of 14005 | ## About this series Trina Solar's Vertex N TSM-NEG21C.20 71 (715-740W) is designed for maximum energy yield in large-scale projects where every cost element counts and reliability matters. The use of **n-type cells in i-TOPCon technology** helps reduce typical power losses over time and stabilizes module performance in real-world conditions, even at higher temperatures. The **bifacial glass-glass construction** enables additional rear-side generation, particularly effective on farms with light backgrounds or in light-reflective systems - without the need to add more rowsof panels. A key feature of this series is the **low-voltage design**, which facilitates longer strings and truly reduces BOS costs, leading to a lower LCOE in large plants. The **multi-busbar** technology improves light capture and supports uniform current transport, while the focus on **high environmental resistance** aids applications exposed to dust, humidity, or industrial atmospheres. This is an excellent choice for PV farms and large commercial rooftops, where yield, durability, and predictable performance are top priorities. ## Notable figures - At 23.0% efficiency, this panel is on par with typical \*\*TOPCon 700-750W\*\* modules - At 230.2 W/m² power density, roof space requirements are typical for \*\*TOPCon 700-750W\*\* panels - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 700-750W\*\* panels - 80% bifaciality enables rear-side power generation, boosting yield by 4-12% on reflective surfaces - In the top 14% for efficiency among all TOPCon panels ## Questions ### How does i-TOPCon cell technology in Trina Vertex N panels differ from standard p-type PERC cells? N-type cells used in i-TOPCon are less susceptible to light-induced degradation (LID) and offer better temperature stability than conventional p-type PERC cells. The Vertex N series has a temperature coefficient of about -0.29%/°C, meaning smaller power losses at high operating temperatures. In practice, the panel maintains higher efficiency for longer, especially in large ground-mount installations exposed to heat buildup. ### How much extra energy does the bifacial glass-glass design in the Vertex N actually generate? Rear-side energy gain depends on ground albedo, mounting height, and tilt angle - on light-colored gravel or roofing membrane, annual output can increase by several to over ten percent. The glass-glass construction also improves mechanical durability and reduces degradation, resulting in more stable long-term yield, particularly in PV farms with reflective surroundings. ### What warranty comes with Trina Solar Vertex N TSM-NEG21C.20 panels? The manufacturer offers a 12-year product warranty and a 30-year linear power output warranty, which is standard for premium modules used in utility-scale installations. This power warranty guarantees a predictable, gradual output decline over time, making it easier to model accurate ROI when planning PV farms or large commercial installations. ### Does the Vertex N's low-voltage design actually reduce costs on large-scale installations? Yes, lower operating voltage combined with high per-module power allows longer strings to be built without exceeding inverter voltage limits. This reduces the number of strings needed, DC cabling, and other BOS components, which lowers cost per kWp on large projects - the manufacturer reports LCOE savings of a few percent compared to conventional module designs. ### Are the 715-740W Vertex N panels suitable for large commercial roofs, or only ground-mount farms? The series works well in both applications, though due to the large module size and weight of the higher-power variants, it performs best on large commercial and industrial roofs with adequate load capacity, as well as on PV farms. High environmental resistance, including against dust and moisture, supports operation in harsher conditions typical of warehouse or industrial rooftops. ### What does multi-busbar technology add compared to panels with fewer busbars? A higher number of thin busbars shortens the current path within each cell, reducing resistive losses and improving light capture by minimizing cell shading. This results in higher module efficiency and better resistance to microcracks, which matters for transport and installation of these large-format, high-power panels. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/dt-m-0042-g-en-j-datasheet-vertex-neg21c-20-2025-c-1-06ab4d423bce.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | -35 W, lighter, +2.2 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -40 W, lighter, +2.0 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, lighter, +2.0 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, lighter, +1.9 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -45 W, lighter, +1.8 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -45 W, lighter, +1.8 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -45 W, lighter, +1.8 pp | | [Trina Solar TSM-DEG21C.20-645](https://comparepv.com/panel/trina-solar-co-ltd-tsm-deg21c-20-645) | 645 W | -70 W, hotter, -2.2 pp | | [Trina Solar TSM-DEG21C.20-650](https://comparepv.com/panel/trina-solar-co-ltd-tsm-deg21c-20-650) | 650 W | -65 W, hotter, -2.1 pp | | [Trina Solar TSM-DE21-655W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-655w) | 655 W | -60 W, lighter, -1.9 pp | | [Trina Solar TSM-DE21-660W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-660w) | 660 W | -55 W, lighter, -1.8 pp | | [Trina Solar TSM-DE21-665W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-665w) | 665 W | Hotter, lighter, -1.6 pp | | [Trina Solar TSM-DE21-670W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-670w) | 670 W | Hotter, lighter, -1.5 pp | | [Trina Solar TSM-DE21-675W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-675w) | 675 W | Hotter, lighter, -1.3 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +90 W, cooler, +2.1 pp | | [AIKO AIKO-A800-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a800-grh78dw) | 800 W | +85 W, cooler, +1.9 pp | --- Source: https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg21c-20-715 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.