--- title: "Trina Solar TSM-DE09.08-400 vs Trina Solar TSM-DE09R-435 - Solar Panel Comparison | ComparePV" description: "Compare Trina Solar TSM-DE09.08-400 vs Trina Solar TSM-DE09R-435 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/trina-solar-tsm-de09-08-400/trina-solar-tsm-de09r-435" image: "https://comparepv.com/og/compare/panels/trina-solar-tsm-de09-08-400/trina-solar-tsm-de09r-435.png" updated: 2026-09-11 --- # Trina Solar TSM-DE09.08-400 vs Trina Solar TSM-DE09R-435 DE09R-435 leads on the differences that matter The largest is module efficiency: 1.00 pp more efficient. 7 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Trina Solar TSM-DE09.08-400](https://comparepv.com/panel/trina-solar-tsm-de09-08-400) | [Trina Solar TSM-DE09R-435](https://comparepv.com/panel/trina-solar-tsm-de09r-435) | | Manufacturer | Trina Solar | Trina Solar | | Power | 400 Wp | 435 Wp | | Efficiency | 20.80 % | 21.80 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | DE09.08-400 | DE09R-435 | Difference | | --- | --- | --- | --- | | Module efficiency | 20.80 % | 21.80 % | +1.00 pp for DE09R-435 | | Rated power | 400 Wp | 435 Wp | +35 W for DE09R-435 | | Power density | 208.1 Wp/m² | 217.7 Wp/m² | +9.6 Wp/m² for DE09R-435 | | Product warranty | 15 yrs | 12 yrs | +3 yrs for DE09.08-400 | | Open-circuit voltage | 41.20 V | 50.40 V | 9.20 V apart | | Module area | 1.922 m² | 1.998 m² | 0.076 m² apart | | Short-circuit current | 12.28 A | 10.67 A | 1.61 A apart | | Voltage at max power | 34.20 V | 42.50 V | 8.30 V apart | | Cell count | 120 | 144 | 24 cells apart | | Weight per kWp | 52.5 kg/kWp | 50.1 kg/kWp | -2.4 kg/kWp for DE09R-435 | | Current at max power | 11.70 A | 10.24 A | 1.46 A apart | | Dimensions | 1754x1096x30 mm | 1762x1134x30 mm | 1754x1096x30 mm vs 1762x1134x30 mm | ## Every compared parameter | Parameter | DE09.08-400 | DE09R-435 | | --- | --- | --- | | Rated power | 400 Wp | 435 Wp | | Module efficiency | 20.80 % | 21.80 % | | Power density | 208.1 Wp/m² | 217.7 Wp/m² | | Open-circuit voltage | 41.20 V | 50.40 V | | Voltage at max power | 34.20 V | 42.50 V | | Short-circuit current | 12.28 A | 10.67 A | | Current at max power | 11.70 A | 10.24 A | | Temperature coefficient | -0.340 %/°C | -0.340 %/°C | | Dimensions | 1754x1096x30 mm | 1762x1134x30 mm | | Module area | 1.922 m² | 1.998 m² | | Weight | 21.0 kg | 21.8 kg | | Weight per kWp | 52.5 kg/kWp | 50.1 kg/kWp | | Product warranty | 15 yrs | 12 yrs | | Performance warranty | 25 yrs | 25 yrs | | Annual degradation | 0.55 %/yr | 0.55 %/yr | | Cell technology | PERC | PERC | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 120 | 144 | | Bifacial | No | No | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.340 %/°C), so a warmer roof scales both curves by the same factor: the totals fall together and neither panel gains on the other. - **Cumulative output, DE09.08-400:** 12,964 kWh - **Cumulative output, DE09R-435:** 14,098 kWh - **Gap:** 1,134 kWh ## Output when hot | Condition | Cell temperature | DE09.08-400 | DE09R-435 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 400 W | 435 W | 100.0% of rated power | | Cool, bright day | 40 °C | 380 W | 413 W | 94.9% of rated power | | Typical summer roof | 55 °C | 359 W | 391 W | 89.8% of rated power | | Hot roof | 70 °C | 339 W | 368 W | 84.7% of rated power | ## Against the whole database | Measure | DE09.08-400 | DE09R-435 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #10,533 | #7,085 | 14,129 | DE09R-435 leads by 3,448 places | | Power density | #10,542 | #7,129 | 14,129 | DE09R-435 leads by 3,413 places | | Heat behaviour | #8,846 | #8,846 | 14,129 | Tied - the same position in the database | | Weight | #6,090 | #3,628 | 14,129 | DE09R-435 leads by 2,462 places | | Warranty | #9,912 | #9,912 | 14,129 | Tied - the same position in the database | | Overall | #11,723 | #10,762 | 14,129 | DE09R-435 leads by 961 places | ## Questions ### Which panel is better: Trina Solar TSM-DE09.08-400 or Trina Solar TSM-DE09R-435? According to our database: **Trina Solar TSM-DE09R-435** has higher module efficiency (**21.80%** vs **20.80%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Trina Solar TSM-DE09.08-400 and Trina Solar TSM-DE09R-435? **Trina Solar TSM-DE09.08-400** has a module efficiency of **20.80%**, while **Trina Solar TSM-DE09R-435** is **21.80%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Trina Solar TSM-DE09.08-400 use vs Trina Solar TSM-DE09R-435? **Trina Solar TSM-DE09.08-400** uses **PERC** cells; **Trina Solar TSM-DE09R-435** uses **PERC**. Modern **n-type** technologies (**TOPCon**, **HJT**, BC) typically deliver higher efficiency and lower degradation compared to older **PERC** (p-type) cells. ### What is the warranty on Trina Solar TSM-DE09.08-400 and Trina Solar TSM-DE09R-435? **Trina Solar TSM-DE09.08-400** has a **25 years** power warranty; **Trina Solar TSM-DE09R-435** has a **25 years** power warranty. The power warranty guarantees a minimum percentage of rated output at the end of the warranty period (typically 80**-87%**). Product (materials) warranties are usually shorter. ## Related comparisons - [Trina Solar TSM-DE09.08-400 vs Trina Solar TSM-DE09R.08-435](https://comparepv.com/compare/trina-solar-tsm-de09-08-400/trina-solar-tsm-de09r-08-435) - 11 differences, the largest is module efficiency - [Trina Solar TSM-DE09.08-400 vs Trina Solar TSM-DE09R-430](https://comparepv.com/compare/trina-solar-tsm-de09-08-400/trina-solar-tsm-de09r-430) - 11 differences, the largest is module efficiency - [Trina Solar TSM-DE09.08-400 vs Trina Solar TSM-DE09R.08-430](https://comparepv.com/compare/trina-solar-tsm-de09-08-400/trina-solar-tsm-de09r-08-430) - 10 differences, the largest is module efficiency - [Trina Solar TSM-DE09.08-400 vs Trina Solar TSM-DE09R-425](https://comparepv.com/compare/trina-solar-tsm-de09-08-400/trina-solar-tsm-de09r-425) - 11 differences, the largest is module efficiency - [Trina Solar TSM-DE09.08-400 vs Trina Solar TSM-DE09R.08-425](https://comparepv.com/compare/trina-solar-tsm-de09-08-400/trina-solar-tsm-de09r-08-425) - 10 differences, the largest is module efficiency - [Trina Solar TSM-DE09.08-400 vs Trina Solar TSM-DE09R.08-420](https://comparepv.com/compare/trina-solar-tsm-de09-08-400/trina-solar-tsm-de09r-08-420) - 9 differences, the largest is rated power --- Source: https://comparepv.com/compare/trina-solar-tsm-de09-08-400/trina-solar-tsm-de09r-435 Not in this file, on the page: the thirty-year yield curve year by year at a cell temperature you pick and a written summary generated on request.