--- title: "Trina Solar TSM-NEG9RC.27-425 425W Solar Panel - Specs & Review | ComparePV" description: "Trina Solar TSM-NEG9RC.27-425 425W solar panel. Specs: 21.30% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg9rc-27-425" updated: 2026-09-11 --- # Trina Solar TSM-NEG9RC.27-425 Middle of its segment, modest efficiency 1,218 panels in the segment TOPCon 400-450 W ## Identity - **Manufacturer:** Trina Solar - **Model:** TSM-NEG9RC.27-425 - **Series:** Vertex S+ (TSM-NEG9RC.27 425–450W) - **Rated power:** 425 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 400-450 W (1218 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 425 W | 435 W | Typical | | | Module efficiency | 21.30% | 22.00% | Weak - bottom 13% | 8,519 | | Power density | 212.7 | 220.2 | Weak - bottom 13% | 8,733 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | 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% | 8,519 | | Power density | 212.7 | 220.2 | Weak - bottom 13% | 8,733 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 49.4 | 51.4 | Typical | 2,909 | | 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, commercial, shaded-installations and hot-climate. - **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 - **Bifacial:** yes ### 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:** 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:** 371 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 8519 of 14005 | | Power density | 8733 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 2909 of 14005 | | Warranty | 21 of 14005 | ## About this series The Trina Solar Vertex S+ Series (TSM-NEG9RC.27 425-450W) are modules designed for roofs, where efficiency, durability, and aesthetics are all important. The key advantage is **n-type i-TOPCon cells** - they operate more reliably over time and lose efficiency more slowly, genuinely improving the long-term profitability of installations. The applied **dual-glass (glass-glass) construction** better protects against moisture, loads, and typical operational risks, while also facilitating high reliability in demanding conditions (e.g., high humidity, airborne salinity). The Clear Black variant features **a black, transparent aesthetic** - the panel is less visually dominant on the roof, which is significant for modern buildings and premium investments. This solution is for residential and commercial rooftop installations where you need a **compromise between power and a compact format**, as well as wide compatibility with popular inverters and optimizers. An additional argument is the **extended warranty**, which enhances the security of the investment and distinguishes the series from many standard rooftop modules. ## Notable figures - Efficiency of 21.3% is 0.7pp below the \*\*TOPCon 400-450W\*\* median (22.0%) - 212.7 W/m² power density is 7.5 W/m² below \*\*TOPCon 400-450W\*\* median (220.2 W/m²) - requires larger installation area - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 400-450W\*\* panels - At 21.0 kg, weight matches the \*\*TOPCon 400-450W\*\* median - Bifaciality factor of 80% can add 4-12% extra yield with reflective mounting surface ## Questions ### What warranty comes with the Trina Vertex S+ TSM-NEG9RC.27 panels? The manufacturer provides a 15-year product warranty and a 30-year linear power warranty, guaranteeing at least 87.4% of original output after 30 years of operation. This is longer than many standard rooftop modules offer, which meaningfully strengthens the investment's security and lowers the levelized cost of energy over the system's lifetime. ### What is n-type i-TOPCon technology and does it actually improve panel performance? i-TOPCon uses n-type cells with an additional passivation layer that reduces current losses and slows module degradation over time. In practice this delivers higher efficiency (up to 22.5%) and a slower year-over-year power decline compared to conventional p-type PERC cells, resulting in higher energy yield over a 20-30 year lifespan. ### What does bifacial mean for the Vertex S+, and how much extra energy does it really produce? The module generates power from both the front and rear side of the cells, capturing light reflected off the roof, terrace, or a light-colored facade. With a bifaciality factor of around 80%, mounting on a bright surface or ground-mount structure can add several to over ten percent extra annual yield compared to a monofacial panel of the same rated power. ### Is the dual-glass construction more durable than a standard glass-and-backsheet panel? Yes, using glass instead of a standard polymer backsheet better protects the cells against moisture, microcracks, and PID degradation, which matters especially in coastal or high-humidity regions. This construction also offers stronger mechanical resistance to hail and snow loads, supporting long-term reliability and justifying the extended product warranty. ### Is the Trina Vertex S+ Clear Black 450W suitable for a single-family sloped roof? Yes, the compact 1762x1134 mm footprint and roughly 21 kg weight make it easy to transport and install on typical rafters of a sloped roof. The Clear Black transparent-look aesthetic makes the panel less visually dominant on the roof surface, a common requirement for modern single-family homes and premium projects where facade appearance matters. ### Are the Vertex S+ 425-450W panels compatible with common inverters and power optimizers? Yes, the module's voltage and current characteristics align with the standard operating ranges of most string inverters and power optimizers on the market, including hybrid solutions paired with battery storage. This lets installers freely mix components from different manufacturers without compatibility issues, simplifying design for both residential and commercial installations. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/dt-m-0069-f-datasheet-vertexs-neg9rc-27-en-2024-b-cd735351349d.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 | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +65 W, cooler, +3.2 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +75 W, cooler, +3.2 pp | --- Source: https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg9rc-27-425 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.