--- title: "Trina Solar TSM-NEG18R.28-480 480W Solar Panel - Specs & Review | ComparePV" description: "Trina Solar TSM-NEG18R.28-480 480W solar panel. Specs: 21.60% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/trina-solar-tsm-neg18r-28-480" updated: 2026-09-11 --- # Trina Solar TSM-NEG18R.28-480 Middle of its segment, needs the roof space 1,089 panels in the segment TOPCon 450-500 W ## Identity - **Manufacturer:** Trina Solar - **Model:** TSM-NEG18R.28-480 - **Series:** Vertex S+ (Monofacial Dual Glass) - **Rated power:** 480 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 450-500 W (1089 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 480 W | 465 W | Typical | | | Module efficiency | 21.60% | 22.52% | Weak - bottom 8% | 7,652 | | Power density | 215.8 | 225.2 | Weak - bottom 8% | 7,632 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 23.5 kg | 24.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.60% | 22.52% | Weak - bottom 8% | 7,652 | | Power density | 215.8 | 225.2 | Weak - bottom 8% | 7,632 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 49.0 | 52.2 | Typical | 2,641 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **215.8 watts per square metre** - Bottom 8% of the TOPCon 450-500 W segment, against a median of 225.2. Ranked 7,632nd in the whole database. - **21.60% module efficiency** - Bottom 8% of the TOPCon 450-500 W segment, against a median of 22.52%. Ranked 7,652nd in the whole database. - **Best for:** Residential, commercial and shaded-installations. - **Not ideal for:** Roofs where every square metre has to count and tight roof space. ## Specification ### Electrical - **Rated power (Pmax):** 480 W - **Efficiency:** 21.60 % - **Voltage at Pmax (Vmp):** 32.50 V - **Current at Pmax (Imp):** 14.77 A - **Open-circuit voltage (Voc):** 39.20 V - **Short-circuit current (Isc):** 15.72 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:** 108 ### Physical - **Length:** 1961 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 23.5 kg - **Area:** 2.22 m2 - **Power density:** 215.8 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:** 420 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7652 of 14005 | | Power density | 7632 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 2641 of 14005 | | Warranty | 21 of 14005 | ## About this series Trina Solar's Vertex S+ (Monofacial Dual Glass) series is designed for roofs where performance matters, but long-term, trouble-free operation is just as important. Its key advantage is the **dual-glass construction** - instead of a standard backsheet, both sides feature glass, reducing the risk of micro-cracks, improving resistance to moisture and aggressive factors, and enhancing fire safety for installations. In practice, this means fewer warranty claims and more reliable performance in challenging conditions, such as high-humidity areas or near industrial zones. At the heart of the series are **n-type i-TOPCon cells**, prized for their high efficiency and slower degradation compared to many p-type constructions - enabling sustained high performance over a long lifespan. Additionally, the Vertex S+ format is optimized for **compatibility with inverters and optimizers** and offers convenient installation on residential and C&I roofs. This is an excellent choice for investors seeking **long-term power stability**, aesthetics, and real material durability, not just impressive catalog parameters. ## Notable figures - At 21.6% efficiency, this panel is 0.9pp below the \*\*TOPCon 450-500W\*\* median of 22.5% - 215.8 W/m² power density is 9.3 W/m² below \*\*TOPCon 450-500W\*\* median (225.2 W/m²) - requires larger installation area - Temperature coefficient of -0.29%/°C matches the \*\*TOPCon 450-500W\*\* median - In the top 55% for efficiency among all TOPCon panels ## Questions ### What makes the dual glass construction of the Trina Vertex S+ different from panels with a standard backsheet? In the dual glass version, the rear backsheet is replaced with tempered glass, matching the front side. This gives symmetrical protection against moisture ingress, microcracks, and mechanical stress during transport or installation. In practice this means fewer warranty claims, a higher fire safety rating, and more stable long-term module performance, especially in harsher climate conditions. ### What is n-type i-TOPCon cell technology in the Vertex S+ and does it actually improve energy yield? i-TOPCon is an n-type cell technology with an added passivation layer that reduces carrier recombination and increases conversion efficiency compared to older p-type PERC cells. The key advantage is a slower annual degradation rate, so the module loses less power year over year. For an investor this translates into higher real energy yield over a 20-30 year horizon, not just better datasheet numbers. ### What warranty comes with the Trina Solar Vertex S+ Monofacial Dual Glass series? The manufacturer provides a 15-year product warranty covering material and workmanship defects, plus a 30-year linear power output warranty. Trina Solar is a Tier 1 manufacturer headquartered in China, giving it the financial and service backing needed to honor long-term warranty claims, which matters given the extended investment horizon of a PV system. ### Are the Vertex S+ 480 Wp panels suitable for coastal or industrial locations with high humidity? Yes, the dual glass construction is designed specifically for such environments. Glass on both sides of the module withstands salt mist, high humidity, ammonia vapor, and industrial dust far better than a conventional backsheet, which can crack or lose its seal over time. This significantly lowers the risk of internal corrosion and premature power loss in these locations. ### Is the Trina Vertex S+ Monofacial Dual Glass panel bifacial? No, this version is monofacial, generating power only from the front surface. Trina Solar also offers a bifacial variant of the same series, but the monofacial version performs better on typical pitched roofs, where the rear side sits close to the roof surface and there is no practical rear-side light gain to capture. ### Are the 480 Wp Vertex S+ panels compatible with standard inverters and power optimizers? Yes, the Vertex S+ format and electrical parameters are optimized for popular string inverter configurations used in residential and C&I installations. The module works with standard string inverters and power optimizers from most leading manufacturers, making it easy to design a system without needing niche or proprietary equipment. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DT-M-0088-B-Datasheet-Vertex-NEG18R28-EN-2024-A-web-0-e654fa5320fe.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +30 W, cooler, +3.4 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | Cooler, lighter, +3.2 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +25 W, cooler, +3.1 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | Cooler, lighter, +2.9 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +20 W, cooler, +2.9 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | Cooler, lighter, +2.9 pp | | [Trina Solar TSM-NEG18R.28-475](https://comparepv.com/panel/trina-solar-tsm-neg18r-28-475) | 475 W | -0.2 pp | | [Trina Solar TSM-NEG18R.25-485](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg18r-25-485) | 485 W | Very close match | | [Trina Solar TSM-NEG18RC.27-490](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg18rc-27-490) | 490 W | +10 W, +0.4 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +80 W, cooler, +3.2 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +75 W, cooler, +3.0 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +70 W, lighter, +2.8 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +60 W, cooler, +2.8 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +60 W, cooler, +2.8 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | +65 W, heavier, +2.7 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +65 W, cooler, +2.6 pp | --- Source: https://comparepv.com/panel/trina-solar-tsm-neg18r-28-480 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.