--- title: "Trina Solar TSM-445NED9R.28 vs Trina Solar TSM-470NED9R.28 - Solar Panel Comparison | ComparePV" description: "Compare Trina Solar TSM-445NED9R.28 vs Trina Solar TSM-470NED9R.28 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-445ned9r-28/trina-solar-tsm-470ned9r-28" updated: 2026-09-11 --- # Trina Solar TSM-445NED9R.28 vs Trina Solar TSM-470NED9R.28 470NED9R.28 leads on the differences that matter The largest is module efficiency: 1.20 pp more efficient. 13 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Trina Solar TSM-445NED9R.28](https://comparepv.com/panel/trina-solar-tsm-445ned9r-28) | [Trina Solar TSM-470NED9R.28](https://comparepv.com/panel/trina-solar-tsm-470ned9r-28) | | Manufacturer | Trina Solar | Trina Solar | | Power | 445 Wp | 470 Wp | | Efficiency | 22.30 % | 23.50 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 445NED9R.28 | 470NED9R.28 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.30 % | 23.50 % | +1.20 pp for 470NED9R.28 | | Power density | 222.7 Wp/m² | 235.2 Wp/m² | +12.5 Wp/m² for 470NED9R.28 | | Rated power | 445 Wp | 470 Wp | +25 W for 470NED9R.28 | | Weight per kWp | 60.7 kg/kWp | 57.4 kg/kWp | -3.2 kg/kWp for 470NED9R.28 | | Open-circuit voltage | 52.60 V | 54.60 V | 2.00 V apart | | Voltage at max power | 44.30 V | 46.10 V | 1.80 V apart | ## Every compared parameter | Parameter | 445NED9R.28 | 470NED9R.28 | | --- | --- | --- | | Rated power | 445 Wp | 470 Wp | | Module efficiency | 22.30 % | 23.50 % | | Power density | 222.7 Wp/m² | 235.2 Wp/m² | | Open-circuit voltage | 52.60 V | 54.60 V | | Voltage at max power | 44.30 V | 46.10 V | | Short-circuit current | 10.71 A | 10.89 A | | Current at max power | 10.05 A | 10.20 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1762x1134x30 mm | 1762x1134x30 mm | | Module area | 1.998 m² | 1.998 m² | | Weight | 27.0 kg | 27.0 kg | | Weight per kWp | 60.7 kg/kWp | 57.4 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 144 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.290 %/°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, 445NED9R.28:** 14,931 kWh - **Cumulative output, 470NED9R.28:** 15,769 kWh - **Gap:** 838 kWh ## Output when hot | Condition | Cell temperature | 445NED9R.28 | 470NED9R.28 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 445 W | 470 W | 100.0% of rated power | | Cool, bright day | 40 °C | 426 W | 450 W | 95.7% of rated power | | Typical summer roof | 55 °C | 406 W | 429 W | 91.3% of rated power | | Hot roof | 70 °C | 387 W | 409 W | 87.0% of rated power | ## Against the whole database | Measure | 445NED9R.28 | 470NED9R.28 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #5,100 | #716 | 14,005 | 470NED9R.28 leads by 4,384 places | | Power density | #5,302 | #674 | 14,005 | 470NED9R.28 leads by 4,628 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #12,514 | #11,218 | 14,005 | 470NED9R.28 leads by 1,296 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #9,006 | #6,529 | 14,005 | 470NED9R.28 leads by 2,477 places | ## Questions ### Which panel is better: Trina Solar TSM-445NED9R.28 or Trina Solar TSM-470NED9R.28? According to our database: **Trina Solar TSM-470NED9R.28** has higher module efficiency (**23.50%** vs **22.30%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Trina Solar TSM-445NED9R.28 and Trina Solar TSM-470NED9R.28? **Trina Solar TSM-445NED9R.28** has a module efficiency of **22.30%**, while **Trina Solar TSM-470NED9R.28** is **23.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Trina Solar TSM-445NED9R.28 use vs Trina Solar TSM-470NED9R.28? **Trina Solar TSM-445NED9R.28** uses **TOPCon** cells; **Trina Solar TSM-470NED9R.28** uses **TOPCon**. 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-445NED9R.28 and Trina Solar TSM-470NED9R.28? **Trina Solar TSM-445NED9R.28** has a **30 years** power warranty; **Trina Solar TSM-470NED9R.28** has a **30 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. ### Are Trina Solar TSM-445NED9R.28 and Trina Solar TSM-470NED9R.28 bifacial panels? Both **Trina Solar TSM-445NED9R.28** and **Trina Solar TSM-470NED9R.28** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Trina Solar TSM-445NED9R.28 vs Trina Solar TSM-465NED9R.28](https://comparepv.com/compare/trina-solar-tsm-445ned9r-28/trina-solar-tsm-465ned9r-28) - 6 differences, the largest is module efficiency - [Trina Solar TSM-445NED9R.28 vs Trina Solar TSM-460NED9R.28](https://comparepv.com/compare/trina-solar-tsm-445ned9r-28/trina-solar-tsm-460ned9r-28) - 5 differences, the largest is module efficiency - [Trina Solar TSM-445NED9R.28 vs Trina Solar TSM-455NED9R.28](https://comparepv.com/compare/trina-solar-tsm-445ned9r-28/trina-solar-tsm-455ned9r-28) - 3 differences, the largest is module efficiency - [Trina Solar TSM-445NED9R.28 vs Trina Solar TSM-450NED9R.28](https://comparepv.com/compare/trina-solar-tsm-445ned9r-28/trina-solar-tsm-450ned9r-28) - One difference: module efficiency - [Trina Solar TSM-445NED9R.28 vs Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/compare/trina-solar-tsm-445ned9r-28/trina-solar-tsm-neg21c-20q-760) - 15 differences, the largest is module efficiency - [Trina Solar TSM-445NED9R.28 vs Trina Solar TSM-NEG21C.20Q-755](https://comparepv.com/compare/trina-solar-tsm-445ned9r-28/trina-solar-tsm-neg21c-20q-755) - 15 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/trina-solar-tsm-445ned9r-28/trina-solar-tsm-470ned9r-28 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.