--- title: "Trina Solar TSM-NEG18R.28-520 520W Solar Panel - Specs & Review | ComparePV" description: "Trina Solar TSM-NEG18R.28-520 520W solar panel: 1 shop offer from 316.96 zł. Specs: 23.40% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg18r-28-520-1" updated: 2026-10-04 --- # Trina Solar TSM-NEG18R.28-520 Light for its output, no clear weak spot 432 panels in the segment TOPCon 500-550 W ## Identity - **Manufacturer:** Trina Solar - **Model:** TSM-NEG18R.28-520 - **Series:** Vertex S+ (TSM-NEG18R.28 490–520W) - **Rated power:** 520 W - **Cell technology:** TOPCon ## Price offers Prices are the figure each shop printed, on that shop's side of VAT. | Shop | Market | Price | Per kWp | Availability | Last read | | --- | --- | --- | --- | --- | --- | | [Sklep Soltech](https://comparepv.com/go/5007) | Poland | 316.96 zł net | 609.54 zł/kWp | Not stated | Last read 4 Oct 03:34 | ## How it compares Compared against segment TOPCon 500-550 W (432 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 520 W | 510 W | Typical | | | Module efficiency | 23.40% | 22.73% | Strong - top 9% | 882 | | Power density | 233.8 | 227.4 | Strong - top 9% | 909 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 23.5 kg | 27.0 kg | Strong - top 6% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.40% | 22.73% | Strong - top 9% | 882 | | Power density | 233.8 | 227.4 | Strong - top 9% | 909 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 45.2 | 52.4 | Strong - top 6% | 635 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **45.2 kg per kWp** - Top 6% of the TOPCon 500-550 W segment, against a median of 52.4. Ranked 635th in the whole database. - **23.40% module efficiency** - Top 9% of the TOPCon 500-550 W segment, against a median of 22.73%. Ranked 882nd in the whole database. - **233.8 watts per square metre** - Top 9% of the TOPCon 500-550 W segment, against a median of 227.4. Ranked 909th in the whole database. - **Best for:** Commercial, shaded-installations and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 520 W - **Efficiency:** 23.40 % - **Voltage at Pmax (Vmp):** 34.10 V - **Current at Pmax (Imp):** 15.25 A - **Open-circuit voltage (Voc):** 41.20 V - **Short-circuit current (Isc):** 15.99 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:** 233.8 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:** 454 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 882 of 14005 | | Power density | 909 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 635 of 14005 | | Warranty | 21 of 14005 | ## About this series Trina Solar Vertex S+ TSM-NEG18R.28 490-520W is designed as a robust yet practical module for commercial and industrial rooftops, where fast installation, safety, and stable energy production over years are key. The use of **i-TOPCon n-type cells** means a higher yield in real operating conditions and less sensitivity to typical operational losses, translating to more predictable savings. The **dual-glass** construction increases resistance to environmental factors and micro-cracking risks, thereby reducing downtime and warranty claims in demanding locations. This series stands out for its installation economics - the **low-voltage architecture** and high string power allow for more efficient system design and reduced BOS costs, especially on large rooftops with long cable runs. For investors and EPC companies, a significant advantage is also the **long-term performance warranty**, supporting the project’s financial certainty. This is an excellent choice for halls, warehouses, commercial buildings, and the modernization of existing installations, where competition often requires compromises between power, durability, and ease of implementation. ## Notable figures - Efficiency of 23.4% is 0.7pp above the \*\*TOPCon 500-550W\*\* median (22.7%) - 233.8 W/m² power density - 6.4 W/m² more than \*\*TOPCon 500-550W\*\* median (227.4 W/m²), more power per roof area - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 500-550W\*\* panels - 23.5 kg weight - 3.5 kg lighter than \*\*TOPCon 500-550W\*\* median (27.0 kg), reducing installation effort - #882 for efficiency, #2165 for temperature performance out of 14005 panels ## Questions ### What warranty comes with the Trina Solar Vertex S+ TSM-NEG18R.28 panels? The series comes with a 15-year product warranty and a 30-year power warranty, guaranteeing at least 87.4% output after that period. This is one of the longer warranties available for modules in this class, which matters especially when planning ROI for commercial installations, where energy production stability is calculated over several decades. ### What is n-type TOPCon technology in the Vertex S+ panels, and is it better than PERC? TOPCon (Tunnel Oxide Passivated Contact) is an n-type cell technology that reduces recombination losses and light-induced degradation (LID), allowing the panel to reach higher efficiency (up to 23.4%) and better withstand high temperatures than older p-type PERC cells. In practice, this means higher real-world annual energy yield and slower power decline over the years of operation. ### Are the Vertex S+ TSM-NEG18R.28 panels bifacial modules? No, this specific series uses a dual-glass construction but operates as a monofacial module - the rear glass serves a protective function, increasing mechanical durability, rather than generating additional energy from reflected light. If a bifacial module is needed, a bifacial variant from the Vertex family is available in other power ratings. ### What does the low-voltage architecture in the Vertex S+ mean, and how does it affect installation costs? The low-voltage architecture combined with high string power allows longer panel strings to be designed while staying within inverter voltage limits. This reduces the number of cable runs and combiner boxes needed, directly lowering BOS (Balance of System) costs - an important factor for large commercial and industrial roofs with long cable routes. ### Does the dual-glass construction of the Vertex S+ hold up on industrial roofs in harsh weather conditions? Yes, the dual-glass build increases the module's resistance to microcracks, moisture, and mechanical loads such as strong wind or snow load, reducing the risk of failures and warranty claims over the panel's lifetime. This makes it particularly well-suited to large roof areas on warehouses and industrial halls, where harder service access raises the cost of any repairs. ### What kind of installations is the Trina Solar Vertex S+ TSM-NEG18R.28 series best suited for? The series is designed for commercial and industrial roofs - manufacturing halls, warehouses, logistics centers, and retail buildings - as well as retrofits of existing installations. High power output up to 520 Wp, low-voltage architecture, and durable dual-glass construction enable fast installation over large areas while reducing the number of modules needed to reach the target system power. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/dt-m-0088-g-en-e-datasheet-vertex-s-neg18r-28-2025-a-0c3a29a7e942.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | -10 W, cooler, +1.6 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | -25 W, cooler, +1.4 pp | | [Longi Solar LR7-60HVH-560M](https://comparepv.com/panel/longi-lr7-60hvh-560m) | 560 W | +40 W, cooler, +1.4 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | -15 W, cooler, +1.3 pp | | [Longi Solar LR7-60HVH-555M](https://comparepv.com/panel/longi-lr7-60hvh-555m) | 555 W | +35 W, cooler, +1.2 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | -30 W, cooler, +1.1 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | -20 W, cooler, +1.1 pp | | [Trina Solar TSM-NEG18R.28-475](https://comparepv.com/panel/trina-solar-tsm-neg18r-28-475) | 475 W | -45 W, -2.0 pp | | [Trina Solar TSM-NEG18R.28-480](https://comparepv.com/panel/trina-solar-tsm-neg18r-28-480) | 480 W | -40 W, -1.8 pp | | [Trina Solar TSM-NEG18R.25-485](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg18r-25-485) | 485 W | -35 W, -1.6 pp | | [Trina Solar TSM-NEG18RC.27-490](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg18rc-27-490) | 490 W | -30 W, -1.4 pp | | [Longi Solar LR7-60HVHL-550M](https://comparepv.com/panel/longi-lr7-60hvhl-550m) | 550 W | +30 W, lighter, +1.0 pp | | [JA Solar JAT60S40-540/LR](https://comparepv.com/panel/ja-solar-jat60s40-540-lr) | 540 W | +20 W, cooler, +1.0 pp | | [Gokin GK-5-60HG-540M](https://comparepv.com/panel/gokin-gk-5-60hg-540m) | 540 W | +20 W, cooler, +1.0 pp | | [Jinko Solar JKM545-54QL6-DV-F1-EU](https://comparepv.com/panel/jinko-solar-jkm545-54ql6-dv-f1-eu) | 545 W | Cooler, heavier, +0.9 pp | | [Longi Solar LR7-60HVH-545M](https://comparepv.com/panel/longi-lr7-60hvh-545m) | 545 W | +25 W, cooler, +0.8 pp | --- Source: https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg18r-28-520-1 Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.