--- title: "Trina Solar TSM-NEG18R.28-475 vs Trina Solar TSM-NEG18R.28-480 - Solar Panel Comparison | ComparePV" description: "Compare Trina Solar TSM-NEG18R.28-475 vs Trina Solar TSM-NEG18R.28-480 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-neg18r-28-475/trina-solar-tsm-neg18r-28-480" image: "https://comparepv.com/og/compare/panels/trina-solar-tsm-neg18r-28-475/trina-solar-tsm-neg18r-28-480.png" updated: 2026-09-11 --- # Trina Solar TSM-NEG18R.28-475 vs Trina Solar TSM-NEG18R.28-480 480 leads on the differences that matter The largest is module efficiency: 0.20 pp more efficient. 18 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Trina Solar TSM-NEG18R.28-475](https://comparepv.com/panel/trina-solar-tsm-neg18r-28-475) | [Trina Solar TSM-NEG18R.28-480](https://comparepv.com/panel/trina-solar-tsm-neg18r-28-480) | | Manufacturer | Trina Solar | Trina Solar | | Power | 475 Wp | 480 Wp | | Efficiency | 21.40 % | 21.60 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 475 | 480 | Difference | | --- | --- | --- | --- | | Module efficiency | 21.40 % | 21.60 % | +0.20 pp for 480 | ## Every compared parameter | Parameter | 475 | 480 | | --- | --- | --- | | Rated power | 475 Wp | 480 Wp | | Module efficiency | 21.40 % | 21.60 % | | Power density | 213.6 Wp/m² | 215.8 Wp/m² | | Open-circuit voltage | 39.00 V | 39.20 V | | Voltage at max power | 32.30 V | 32.50 V | | Short-circuit current | 15.68 A | 15.72 A | | Current at max power | 14.72 A | 14.77 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1961x1134x30 mm | 1961x1134x30 mm | | Module area | 2.224 m² | 2.224 m² | | Weight | 23.5 kg | 23.5 kg | | Weight per kWp | 49.5 kg/kWp | 49.0 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 | 108 | 108 | | 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 (-0.290 %/°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, 475:** 15,937 kWh - **Cumulative output, 480:** 16,105 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | 475 | 480 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 475 W | 480 W | 100.0% of rated power | | Cool, bright day | 40 °C | 454 W | 459 W | 95.7% of rated power | | Typical summer roof | 55 °C | 434 W | 438 W | 91.3% of rated power | | Hot roof | 70 °C | 413 W | 417 W | 87.0% of rated power | ## Against the whole database | Measure | 475 | 480 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #8,388 | #7,716 | 14,129 | 480 leads by 672 places | | Power density | #8,476 | #7,696 | 14,129 | 480 leads by 780 places | | Heat behaviour | #2,220 | #2,220 | 14,129 | Tied - the same position in the database | | Weight | #3,013 | #2,647 | 14,129 | 480 leads by 366 places | | Warranty | #21 | #21 | 14,129 | Tied - the same position in the database | | Overall | #8,934 | #8,503 | 14,129 | 480 leads by 431 places | ## Questions ### Which panel is better: Trina Solar TSM-NEG18R.28-475 or Trina Solar TSM-NEG18R.28-480? According to our database: **Trina Solar TSM-NEG18R.28-480** has higher module efficiency (**21.60%** vs **21.40%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Trina Solar TSM-NEG18R.28-475 and Trina Solar TSM-NEG18R.28-480? **Trina Solar TSM-NEG18R.28-475** has a module efficiency of **21.40%**, while **Trina Solar TSM-NEG18R.28-480** is **21.60%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Trina Solar TSM-NEG18R.28-475 use vs Trina Solar TSM-NEG18R.28-480? **Trina Solar TSM-NEG18R.28-475** uses **TOPCon** cells; **Trina Solar TSM-NEG18R.28-480** 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-NEG18R.28-475 and Trina Solar TSM-NEG18R.28-480? **Trina Solar TSM-NEG18R.28-475** has a **30 years** power warranty; **Trina Solar TSM-NEG18R.28-480** 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. ## Related comparisons - [Trina Solar TSM-NEG18R.28-475 vs Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/compare/trina-solar-tsm-neg18r-28-475/trina-solar-tsm-neg21c-20q-760) - 15 differences, the largest is module efficiency - [Trina Solar TSM-NEG18R.28-475 vs Trina Solar TSM-NEG21C.20Q-755](https://comparepv.com/compare/trina-solar-tsm-neg18r-28-475/trina-solar-tsm-neg21c-20q-755) - 15 differences, the largest is module efficiency - [Trina Solar TSM-NEG18R.28-475 vs Trina Solar TSM-NEG21C.20Q-750](https://comparepv.com/compare/trina-solar-tsm-neg18r-28-475/trina-solar-tsm-neg21c-20q-750) - 15 differences, the largest is module efficiency - [Trina Solar TSM-NEG18R.28-475 vs Trina Solar TSM-NEG21C.20Q-745](https://comparepv.com/compare/trina-solar-tsm-neg18r-28-475/trina-solar-tsm-neg21c-20q-745) - 15 differences, the largest is module efficiency - [Trina Solar TSM-NEG18R.28-475 vs Trina Solar TSM-NEG21C.20-740](https://comparepv.com/compare/trina-solar-tsm-neg18r-28-475/trina-solar-co-ltd-tsm-neg21c-20-740) - 14 differences, the largest is module efficiency - [Trina Solar TSM-NEG18R.28-475 vs Trina Solar TSM-NEG21C.20 740](https://comparepv.com/compare/trina-solar-tsm-neg18r-28-475/trina-solar-tsm-neg21c-20-740) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/trina-solar-tsm-neg18r-28-475/trina-solar-tsm-neg18r-28-480 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.