--- title: "Trina Solar TSM-NEG21C.20 720W Solar Panel: Specs & Datasheet | ComparePV" description: "Trina Solar TSM-NEG21C.20 720W solar panel. Specs: 23.20% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/trina-solar-tsm-neg21c-20-720w-1" image: "https://comparepv.com/og/panel/trina-solar-tsm-neg21c-20-720w-1.png" updated: 2026-09-11 --- # Trina Solar TSM-NEG21C.20 720W Efficiency leader, no clear weak spot 420 panels in the segment TOPCon 700-750 W ## Identity - **Manufacturer:** Trina Solar - **Model:** TSM-NEG21C.20 720W - **Series:** Vertex N N-type TOPCon Bifacial Dual Glass Monocrystalline Module - **Rated power:** 720 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) | 720 W | 715 W | Typical | | | Module efficiency | 23.20% | 23.00% | Strong - top 25% | 1,349 | | Power density | 231.8 | 230.2 | Typical | 1,390 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | 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 | 23.20% | 23.00% | Strong - top 25% | 1,349 | | Power density | 231.8 | 230.2 | Typical | 1,390 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 53.2 | 52.9 | Typical | 7,089 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **23.20% module efficiency** - Top 25% of the TOPCon 700-750 W segment, against a median of 23.00%. - **Best for:** Utility-scale, commercial and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 720 W - **Efficiency:** 23.20 % - **Voltage at Pmax (Vmp):** 41.30 V - **Current at Pmax (Imp):** 17.44 A - **Open-circuit voltage (Voc):** 49.40 V - **Short-circuit current (Isc):** 18.49 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:** 231.8 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:** 629 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 1349 of 14129 | | Power density | 1390 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 7089 of 14129 | | Warranty | 21 of 14129 | ## About this series The Vertex N series is a breakthrough solution based on **N-type TOPCon technology**, which significantly increases module efficiency beyond market standards. Thanks to the use of a **bifacial dual glass** construction, these panels absorb light from both sides, which, combined with the double glass, guarantees exceptional resistance to difficult weather conditions and extreme mechanical durability. Using monocrystalline cells in an advanced architecture allows for maximizing energy yields while reducing the mounting area, which optimizes the costs of the entire installation. A key advantage of this model is **minimal light-induced degradation** and an excellent temperature coefficient, ensuring the system works efficiently even on very sunny and hot days. This solution is dedicated primarily to large-scale photovoltaic farms and demanding commercial installations, where the priority is the highest **return on investment** rate. Vertex N effectively solves the problem of power drops over time, offering energy production stability for several decades. What sets them apart from competing products is an innovative approach to cell packing density and increased resistance to micro-cracks, making them some of the most reliable modules currently available on the Polish market. ## Notable figures - At 23.2% efficiency, this panel is on par with typical \*\*TOPCon 700-750W\*\* modules - At 231.8 W/m² power density, roof space requirements are typical for \*\*TOPCon 700-750W\*\* panels - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 700-750W\*\* median - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - #1349 for efficiency, #2220 for temperature performance out of 14129 panels ## Questions ### How does N-type TOPCon technology in the Trina Vertex N differ from standard P-type PERC panels? N-type TOPCon cells use phosphorus doping instead of boron, eliminating light-induced degradation (LID) common in PERC modules. Thanks to an additional tunnel oxide passivation layer, the Vertex N reaches up to 23.2% efficiency and a lower annual degradation rate (0.4%), resulting in higher energy yield over the module's lifetime compared to conventional P-type panels. ### Does the bifacial dual-glass design of the Vertex N actually increase energy production? Yes, the rear side of the module captures light reflected off the ground, roof, or mounting structure. Depending on the surface albedo (e.g., light gravel or white roofing), the additional energy gain can range from a few percent to over ten percent above standard front-side output, making it especially cost-effective for large ground-mounted farms with elevated racking. ### What warranty comes with Trina Vertex N modules and what does it cover exactly? The manufacturer provides a 12-year product warranty against material and workmanship defects, plus a 30-year linear power warranty guaranteeing at least 87.4% of nominal power output after 30 years, with an annual degradation rate of about 0.4%. This exceeds the standard 25-year power warranties offered by many competitors. ### What is the maximum power output of the Vertex N and what installations is it suited for? The module delivers up to 720 Wp of maximum power, making it one of the highest-output panels on the market. Given its large dimensions (approx. 2384 x 1303 mm) and high per-unit power, the Vertex N is primarily designed for large-scale solar farms and commercial or industrial installations, where minimizing module count and installation cost per watt is a priority. ### Is Trina Solar, the manufacturer of the Vertex N, a reliable Tier 1 bankable supplier? Trina Solar is a Tier 1 manufacturer based in China with over 25 years of market presence, a global supply chain, and bankability certification (Bloomberg Tier 1). Tier 1 status reflects the company's financial stability and reliable warranty support, which matters for large commercial projects financed by banks or investment funds. ### Does the dual-glass construction of the Vertex N improve resistance to microcracks and harsh weather? Yes, the dual-glass design replaces the rear backsheet with a second tempered glass layer, significantly increasing mechanical rigidity and resistance to snow load, wind, and microcracks that can occur during transport and installation. Glass on both sides also better protects the cells from moisture ingress and PID degradation over the module's long service life. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/Datasheet_VertexN_TSM-NEG21C20_695-720W_2024_A-5cca05f92c70.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | -40 W, lighter, +2.0 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | -45 W, lighter, +1.8 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | Cooler, lighter, +1.8 pp | | [WINAICO WST-675BKX72-A2](https://comparepv.com/panel/winaico-wst-675bkx72-a2) | 675 W | -45 W, lighter, +1.8 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | Cooler, lighter, +1.7 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | -50 W, lighter, +1.6 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | -50 W, lighter, +1.6 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | -50 W, lighter, +1.6 pp | | [Trina Solar TSM-DEG21C.20-645](https://comparepv.com/panel/trina-solar-co-ltd-tsm-deg21c-20-645) | 645 W | -75 W, hotter, -2.4 pp | | [Trina Solar TSM-DEG21C.20-650](https://comparepv.com/panel/trina-solar-co-ltd-tsm-deg21c-20-650) | 650 W | -70 W, hotter, -2.3 pp | | [Trina Solar TSM-DE21-655W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-655w) | 655 W | -65 W, lighter, -2.1 pp | | [Trina Solar TSM-DE21-660W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-660w) | 660 W | -60 W, lighter, -2.0 pp | | [Trina Solar TSM-DE21-665W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-665w) | 665 W | -55 W, lighter, -1.8 pp | | [Trina Solar TSM-DE21-670W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-670w) | 670 W | Hotter, lighter, -1.7 pp | | [Trina Solar TSM-DE21-675W](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de21-675w) | 675 W | Hotter, lighter, -1.5 pp | | [AIKO AIKO-A805-GRH78Dw](https://comparepv.com/panel/aiko-aiko-a805-grh78dw) | 805 W | +85 W, cooler, +1.9 pp | --- Source: https://comparepv.com/panel/trina-solar-tsm-neg21c-20-720w-1 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.