--- title: "Trina Solar TSM-NEG9R.25-425 Solar Panel: Specs & Datasheet | ComparePV" description: "Trina Solar TSM-NEG9R.25-425 solar panel. Specs: 21.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/trina-solar-tsm-neg9r-25-425" image: "https://comparepv.com/og/panel/trina-solar-tsm-neg9r-25-425.png" updated: 2026-09-11 --- # Trina Solar TSM-NEG9R.25-425 Middle of its segment, modest efficiency 1,220 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Trina Solar - **Model:** TSM-NEG9R.25-425 - **Series:** Vertex S+ (Dual Glass Monocrystalline Module) - **Rated power:** 425 W - **Cell technology:** TOPCon ## How it compares Compared against segment TOPCon 400-450 W (1220 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 425 W | 435 W | Typical | | | Module efficiency | 21.30% | 22.00% | Weak - bottom 13% | 8,585 | | Power density | 212.7 | 220.2 | Weak - bottom 13% | 8,800 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight (kg) | 21.0 kg | 22.0 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.30% | 22.00% | Weak - bottom 13% | 8,585 | | Power density | 212.7 | 220.2 | Weak - bottom 13% | 8,800 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 49.4 | 51.5 | Typical | 2,916 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Watch out for - **21.30% module efficiency** - Bottom 13% of the TOPCon 400-450 W segment, against a median of 22.00%. - **212.7 watts per square metre** - Bottom 13% of the TOPCon 400-450 W segment, against a median of 220.2. - **Best for:** Residential and commercial. - **Not ideal for:** Tight roof space and roofs where every square metre has to count. ## Specification ### Electrical - **Rated power (Pmax):** 425 W - **Efficiency:** 21.30 % - **Voltage at Pmax (Vmp):** 42.90 V - **Current at Pmax (Imp):** 9.92 A - **Open-circuit voltage (Voc):** 50.90 V - **Short-circuit current (Isc):** 10.56 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:** 144 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.0 kg - **Area:** 2.00 m2 - **Power density:** 212.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 25 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:** 371 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8585 of 14129 | | Power density | 8800 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 2916 of 14129 | | Warranty | 21 of 14129 | ## About this series Trina Solar’s Vertex S+ (Dual Glass Monocrystalline Module) combines dual glass construction with cutting-edge n-type i-TOPCon cells, delivering enhanced module performance over a long lifespan and superior resistance to typical operational issues. The dual glass structure, replacing traditional backsheets, offers superior protection against moisture ingress and accelerated aging, while improving resilience against micro-cracks, delamination, and impacts - a key advantage for investors in hail-prone areas, high-humidity environments, or corrosive conditions. This design also ensures a high level of fire safety and greater reliability in real-world rooftop applications. The Vertex S+ is engineered for residential and commercial rooftops, where both performance and aesthetics matter. An optional low-profile design supports a discreet installation appearance. Additionally, its compatibility with popular inverters and optimizers streamlines system design and upgrades. This series is ideal for clients seeking reduced maintenance risks and improved system profitability without compromising on quality. ## Notable figures - At 21.3% efficiency, this panel is 0.7pp below the \*\*TOPCon 400-450W\*\* median of 22.0% - Power density of 212.7 W/m² is 7.5 W/m² below \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - needs more roof space - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - Weight of 21.0 kg is typical for \*\*TOPCon 400-450W\*\* panels - In the top 61% for efficiency among all TOPCon panels ## Questions ### What is n-type i-TOPCon technology in Trina Vertex S+ panels and how does it differ from older PERC cells? i-TOPCon is an n-type cell technology featuring an additional passivation layer on the rear side that reduces current losses and boosts module efficiency, reaching up to 22.5% at 450 Wp power output. Compared to conventional p-type PERC cells, TOPCon offers a lower annual power degradation rate, better performance in low-light conditions, and a lower temperature coefficient, resulting in higher annual energy yield, especially during summer months. ### Does the dual glass construction of the Trina Vertex S+ mean it's a bifacial panel? No, the dual glass construction of the Vertex S+ does not make it bifacial - the module is monofacial and generates power only from the front side. The two glass sheets replace the traditional backsheet foil, protecting the cells from moisture, microcracks, and accelerated aging. This design increases panel durability but does not provide the additional energy gain from reflected light that true bifacial modules offer. ### What warranty comes with Trina Solar Vertex S+ panels? The Vertex S+ series comes with a 25-year product warranty and a 30-year linear power warranty, ensuring the module maintains high performance throughout the entire lifespan of the PV installation. As a Tier 1 manufacturer with a long track record, Trina Solar offers a realistic chance of honoring such a long-term warranty, which is an important factor when choosing panels for a residential solar installation. ### Which inverters and power optimizers are compatible with Vertex S+ panels? Vertex S+ panels are designed for compatibility with widely available string inverters and power optimizers from popular brands, simplifying component selection when designing a system and making future upgrades or system expansion easier. The standard voltage and current parameters of the 450 Wp module don't require dedicated, expensive inverter solutions, which helps keep overall installation costs down. ### Are Trina Vertex S+ panels suitable for a single-family home roof in terms of appearance? Yes, the Vertex S+ series is designed with residential installations in mind, where aesthetics matter alongside energy yield. Versions with a more discreet, uniform appearance are available, blending well with single-family home architecture. The dual glass construction also gives the module a more consistent, cleaner visual finish compared to panels with a traditional backsheet. ### What does Tier 1 manufacturer status mean for Trina Solar, and why does it matter when buying panels? Tier 1 status, awarded by organizations such as Bloomberg New Energy Finance, indicates that Trina Solar is a financially stable manufacturer with a proven production track record and strong bankability in the eyes of financing institutions. In practice, this increases the likelihood the company will remain operational throughout the 25-year product warranty and 30-year power warranty period, reducing the buyer's risk regarding future warranty claims. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/datasheet-vertexs-neg9r-25-en-2023-c68c730d26fd.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [Maxeon SPR-MAX7-475](https://comparepv.com/panel/maxeon-spr-max7-475) | 475 W | +50 W, +2.7 pp, +10 yr warranty | | [Just Solar JST-EDMH-(445-465)W-TD (465W class)](https://comparepv.com/panel/just-solar-jst-edmh-445-465-w-td-465w-class) | 465 W | +40 W, hotter, +2.5 pp | | [JA Solar JAT54S40-475/LR](https://comparepv.com/panel/ja-solar-jat54s40-475-lr) | 475 W | +50 W, cooler, +2.5 pp | | [Tongwei TWMNH-48HW475](https://comparepv.com/panel/tongwei-solar-twmnh-48hw475) | 475 W | +50 W, heavier, +2.5 pp | | [Astronergy CHSM48RN(DG)/F-BH-475](https://comparepv.com/panel/astronergy-chint-new-energy-technology-co-ltd-chsm48rn-dg-f-bh-475) | 475 W | +50 W, heavier, +2.5 pp | | [AIKO AIKO-A475-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a475-mce54mw) | 475 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A475-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a475-mah54mw) | 475 W | +50 W, cooler, +2.5 pp | | [Trina Solar TSM-DE09R.05-405](https://comparepv.com/panel/trina-solar-tsm-de09r-05-405) | 405 W | Hotter, -1.0 pp, -5 yr warranty | | [Trina Solar TSM-DE09R.05-410](https://comparepv.com/panel/trina-solar-tsm-de09r-05-410) | 410 W | Hotter, -0.8 pp, -5 yr warranty | | [Trina Solar TSM-DE09R-415](https://comparepv.com/panel/trina-solar-tsm-de09r-415) | 415 W | Hotter, -0.5 pp, -5 yr warranty | | [Trina Solar TSM-DE09R.08-420](https://comparepv.com/panel/trina-solar-tsm-de09r-08-420) | 420 W | Hotter, -0.3 pp, -5 yr warranty | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +85 W, cooler, +3.7 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +70 W, cooler, +3.5 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +80 W, cooler, +3.4 pp | | [WINAICO WST-505BKX54-A2](https://comparepv.com/panel/winaico-wst-505bkx54-a2) | 505 W | +80 W, heavier, +3.4 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +65 W, cooler, +3.2 pp | --- Source: https://comparepv.com/panel/trina-solar-tsm-neg9r-25-425 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.