--- title: "Trina Solar TSM-DE09R-435 435W Solar Panel - Specs & Review | ComparePV" description: "Trina Solar TSM-DE09R-435 435W solar panel. Specs: 21.80% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/trina-solar-tsm-de09r-435" updated: 2026-09-11 --- # Trina Solar TSM-DE09R-435 Space saver, no clear weak spot 954 panels in the segment PERC 400-450 W ## Identity - **Manufacturer:** Trina Solar - **Model:** TSM-DE09R-435 - **Series:** Vertex S (Backsheet Monocrystalline Module) - **Rated power:** 435 W - **Cell technology:** PERC ## How it compares Compared against segment PERC 400-450 W (954 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 435 W | 410 W | Strong - top 22% | | | Module efficiency | 21.80% | 20.60% | Strong - top 1% | 7,022 | | Power density | 217.7 | 206.2 | Strong - top 1% | 7,066 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight (kg) | 21.8 kg | 22.0 kg | Strong - top 19% | | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 21.80% | 20.60% | Strong - top 1% | 7,022 | | Power density | 217.7 | 206.2 | Strong - top 1% | 7,066 | | Temperature coefficient | -0.340 | -0.350 | Strong - top 24% | 8,778 | | Weight per kWp | 50.1 | 53.0 | Strong - top 19% | 3,611 | | Performance warranty | 25 yrs | 25 yrs | Typical | 9,798 | ### Strengths - **217.7 watts per square metre** - Top 1% of the PERC 400-450 W segment, against a median of 206.2. Ranked 7,066th in the whole database. - **21.80% module efficiency** - Top 1% of the PERC 400-450 W segment, against a median of 20.60%. Ranked 7,022nd in the whole database. - **50.1 kg per kWp** - Top 19% of the PERC 400-450 W segment, against a median of 53.0. - **Best for:** Residential, commercial and shaded-installations. ## Specification ### Electrical - **Rated power (Pmax):** 435 W - **Efficiency:** 21.80 % - **Voltage at Pmax (Vmp):** 42.50 V - **Current at Pmax (Imp):** 10.24 A - **Open-circuit voltage (Voc):** 50.40 V - **Short-circuit current (Isc):** 10.67 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.340 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.040 %/degC - **NOCT:** 43 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** PERC - **Cell count:** 144 ### Physical - **Length:** 1762 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 21.8 kg - **Area:** 2.00 m2 - **Power density:** 217.7 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 25 years - **Output guaranteed at end of warranty:** 84.8 % - **First-year degradation:** 2.00 % - **Annual degradation:** 0.55 % - **Output after 30 years:** 357 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 7022 of 14005 | | Power density | 7066 of 14005 | | Temperature coefficient | 8778 of 14005 | | Weight | 3611 of 14005 | | Warranty | 9798 of 14005 | ## About this series Trina Solar's Vertex S (Backsheet Monocrystalline Module) was designed for rooftops where high energy production matters even with limited space. Its key feature is the platform based on a larger wafer format, along with **1/3-cut cell technology** and **non-destructive cutting**, which help minimize losses and enhance module performance stability. The application of **high-density interconnect** and **multi-busbar** supports better current collection and efficiency under less-than-ideal lighting conditions. It is an excellent choice for residential and small commercial installations where you want to pack more power onto the roof, simplify string designs, and maintain compatibility with popular BOS elements. A practical advantage is also better yield predictability on hotter days due to its refined thermal performance. Vertex S stands out from many competitive series by combining a compact format with utility-grade module solutions, without compromising on aesthetics and installation. ## Notable figures - 21.8% module efficiency - 1.2pp better than the \*\*PERC 400-450W\*\* median of 20.6% - At 217.7 W/m² power density, this panel generates 11.5 W/m² more per unit area than \*\*PERC 400-450W\*\* median (206.2 W/m²) - At -0.34%/°C, hot weather performance is typical for \*\*PERC 400-450W\*\* panels - #7022 for efficiency, #8778 for temperature performance out of 14005 panels ## Questions ### Is the Trina Solar Vertex S (Backsheet Monocrystalline Module) series still available for purchase? No, this series has been discontinued and Trina Solar has phased it out in favor of newer models, such as Vertex S+. Units rated up to 435 Wp can still be found through distributors clearing remaining stock, but availability is limited and shrinking. The manufacturer's warranty remains valid regardless of discontinuation, as long as the module was purchased from an authorized dealer. ### What warranty comes with Trina Solar Vertex S panels? The series carries a 25-year product warranty and a 25-year linear power output warranty, which is standard for Tier 1-class modules. This covers protection against material and manufacturing defects, as well as a guaranteed minimum performance level maintained throughout the system's operating life. ### What does 1/3 cut cell technology with non-destructive cutting mean in the Vertex S modules? Cells in this series are divided into three sections instead of the standard half-cut two-piece design, reducing resistive losses and limiting the impact of microcracks on output. Non-destructive laser cutting minimizes damage to the silicon structure during manufacturing, giving the module greater operational stability and lower power degradation over time compared to traditional full-size cells. ### Are Trina Vertex S panels suitable for a small residential roof? Yes, this series was designed for compact roof areas. At roughly 1762×1134 mm and about 21.8 kg, the module delivers up to 435 Wp, allowing more power to be fitted into limited space compared to older, lower-density designs. This format also simplifies transport and installation on typical single-family home roof structures. ### Are Trina Solar Vertex S modules bifacial? No, this series uses a conventional single-sided construction with a backsheet rather than the glass-glass build typical of bifacial modules. Energy is captured only from the front side of the panel, which simplifies mounting on standard roof structures but rules out the extra yield bifacial modules gain from reflected light. ### How do Vertex S panels perform in high summer temperatures? The module has a power temperature coefficient of -0.34%/°C, a solid figure for PERC cells that means a relatively moderate output drop as panel temperature rises above 25°C. This makes energy production more predictable on hot, sunny days, helping with system design and annual yield estimates. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/DT-M-A-Datasheet-VertexS-DE09R-EN-2022-A-web-dbb447e17874.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [JA Solar JAT54S40-485/LR](https://comparepv.com/panel/ja-solar-jat54s40-485-lr) | 485 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A485-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a485-mce54mw) | 485 W | +50 W, cooler, +2.5 pp | | [AIKO AIKO-A485-MAH54Mw](https://comparepv.com/panel/aiko-aiko-a485-mah54mw) | 485 W | +50 W, cooler, +2.5 pp | | [Gokin GK-5-54HG-485M](https://comparepv.com/panel/gokin-gk-5-54hg-485m) | 485 W | +50 W, cooler, +2.5 pp | | [Heckert Solar ZEUS 3.0+ 108 485WP](https://comparepv.com/panel/heckert-solar-zeus-3-0-108-485wp) | 485 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 | -30 W, -1.5 pp | | [Trina Solar TSM-DE09R.05-410](https://comparepv.com/panel/trina-solar-tsm-de09r-05-410) | 410 W | -25 W, -1.3 pp | | [Trina Solar TSM-DE09R-415](https://comparepv.com/panel/trina-solar-tsm-de09r-415) | 415 W | -20 W, -1.0 pp | | [Trina Solar TSM-DE09R.08-420](https://comparepv.com/panel/trina-solar-tsm-de09r-08-420) | 420 W | -15 W, -0.8 pp | | [Longi Solar LR7-54HJD-510M](https://comparepv.com/panel/longi-lr7-54hjd-510m) | 510 W | +75 W, cooler, +3.2 pp | | [AIKO AIKO-A495-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a495-mce54mw) | 495 W | +60 W, cooler, +3.0 pp | | [Longi Solar LR7-54HJD-505M](https://comparepv.com/panel/longi-lr7-54hjd-505m) | 505 W | +70 W, cooler, +2.9 pp | | [AIKO AIKO-A490-MCE54Mw](https://comparepv.com/panel/aiko-aiko-a490-mce54mw) | 490 W | +55 W, cooler, +2.7 pp | | [Longi Solar LR7-54HJD-500M](https://comparepv.com/panel/longi-lr7-54hjd-500m) | 500 W | +65 W, cooler, +2.7 pp | | [Talesun CIPRO-TN9C54M-500W](https://comparepv.com/panel/talesun-cipro-tn9c54m-500w) | 500 W | +65 W, cooler, +2.7 pp | --- Source: https://comparepv.com/panel/trina-solar-tsm-de09r-435 Not in this file, on the page: a thirty-year output simulator and alternatives filtered by how closely they match these dimensions.