--- title: "Trina Solar TSM-NEG18R.28-520 vs Trina Solar TSM-450 NEG9R.28 - Solar Panel Comparison | ComparePV" description: "Compare Trina Solar TSM-NEG18R.28-520 vs Trina Solar TSM-450 NEG9R.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-co-ltd-tsm-neg18r-28-520-1/trina-solar-tsm-450-neg9r-28" updated: 2026-09-11 --- # Trina Solar TSM-NEG18R.28-520 vs Trina Solar TSM-450 NEG9R.28 NEG18R.28-520 leads on the differences that matter The largest is module efficiency: 0.90 pp more efficient. 6 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Trina Solar TSM-NEG18R.28-520](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg18r-28-520-1) | [Trina Solar TSM-450 NEG9R.28](https://comparepv.com/panel/trina-solar-tsm-450-neg9r-28) | | Manufacturer | Trina Solar | Trina Solar | | Power | 520 Wp | 450 Wp | | Efficiency | 23.40 % | 22.50 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | NEG18R.28-520 | 450 NEG9R.28 | Difference | | --- | --- | --- | --- | | Module efficiency | 23.40 % | 22.50 % | +0.90 pp for NEG18R.28-520 | | Rated power | 520 Wp | 450 Wp | +70 W for NEG18R.28-520 | | Product warranty | 15 yrs | 25 yrs | +10 yrs for 450 NEG9R.28 | | Power density | 233.8 Wp/m² | 225.2 Wp/m² | +8.6 Wp/m² for NEG18R.28-520 | | Open-circuit voltage | 41.20 V | 52.90 V | 11.70 V apart | | Short-circuit current | 15.99 A | 10.74 A | 5.25 A apart | | Module area | 2.224 m² | 1.998 m² | 0.226 m² apart | | Weight | 23.5 kg | 21.0 kg | -2.5 kg for 450 NEG9R.28 | | Voltage at max power | 34.10 V | 44.60 V | 10.50 V apart | | Current at max power | 15.25 A | 10.09 A | 5.16 A apart | | Cell count | 108 | 144 | 36 cells apart | | Bifacial | No | Yes | No vs Yes | | Dimensions | 1961x1134x30 mm | 1762x1134x30 mm | 1961x1134x30 mm vs 1762x1134x30 mm | ## Every compared parameter | Parameter | NEG18R.28-520 | 450 NEG9R.28 | | --- | --- | --- | | Rated power | 520 Wp | 450 Wp | | Module efficiency | 23.40 % | 22.50 % | | Power density | 233.8 Wp/m² | 225.2 Wp/m² | | Open-circuit voltage | 41.20 V | 52.90 V | | Voltage at max power | 34.10 V | 44.60 V | | Short-circuit current | 15.99 A | 10.74 A | | Current at max power | 15.25 A | 10.09 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1961x1134x30 mm | 1762x1134x30 mm | | Module area | 2.224 m² | 1.998 m² | | Weight | 23.5 kg | 21.0 kg | | Weight per kWp | 45.2 kg/kWp | 46.7 kg/kWp | | Product warranty | 15 yrs | 25 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 | 144 | | Bifacial | No | 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, NEG18R.28-520:** 17,447 kWh - **Cumulative output, 450 NEG9R.28:** 15,098 kWh - **Gap:** 2,349 kWh ## Output when hot | Condition | Cell temperature | NEG18R.28-520 | 450 NEG9R.28 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 520 W | 450 W | 100.0% of rated power | | Cool, bright day | 40 °C | 497 W | 430 W | 95.7% of rated power | | Typical summer roof | 55 °C | 475 W | 411 W | 91.3% of rated power | | Hot roof | 70 °C | 452 W | 391 W | 87.0% of rated power | ## Against the whole database | Measure | NEG18R.28-520 | 450 NEG9R.28 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #882 | #4,222 | 14,005 | NEG18R.28-520 leads by 3,340 places | | Power density | #909 | #4,225 | 14,005 | NEG18R.28-520 leads by 3,316 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #635 | #1,258 | 14,005 | NEG18R.28-520 leads by 623 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #4,727 | #6,031 | 14,005 | NEG18R.28-520 leads by 1,304 places | ## Questions ### Which panel is better: Trina Solar TSM-NEG18R.28-520 or Trina Solar TSM-450 NEG9R.28? According to our database: **Trina Solar TSM-NEG18R.28-520** has higher module efficiency (**23.40%** vs **22.50%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Trina Solar TSM-NEG18R.28-520 and Trina Solar TSM-450 NEG9R.28? **Trina Solar TSM-NEG18R.28-520** has a module efficiency of **23.40%**, while **Trina Solar TSM-450 NEG9R.28** is **22.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Trina Solar TSM-NEG18R.28-520 use vs Trina Solar TSM-450 NEG9R.28? **Trina Solar TSM-NEG18R.28-520** uses **TOPCon** cells; **Trina Solar TSM-450 NEG9R.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-NEG18R.28-520 and Trina Solar TSM-450 NEG9R.28? **Trina Solar TSM-NEG18R.28-520** has a **30 years** power warranty; **Trina Solar TSM-450 NEG9R.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-NEG18R.28-520 and Trina Solar TSM-450 NEG9R.28 bifacial panels? **Trina Solar TSM-450 NEG9R.28** is bifacial (captures light from both faces); **Trina Solar TSM-NEG18R.28-520** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Trina Solar TSM-NEG18R.28-520 vs Trina Solar TSM-NEG18R.28-515](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg18r-28-520-1/trina-solar-co-ltd-tsm-neg18r-28-515-1) - One difference: module efficiency - [Trina Solar TSM-450 NEG9R.28 vs Trina Solar TSM-NEG18R.20-520](https://comparepv.com/compare/trina-solar-tsm-450-neg9r-28/trina-solar-co-ltd-tsm-neg18r-20-520) - 13 differences, the largest is module efficiency - [Trina Solar TSM-450 NEG9R.28 vs Trina Solar TSM-NEG18RC.27-515](https://comparepv.com/compare/trina-solar-tsm-450-neg9r-28/trina-solar-co-ltd-tsm-neg18rc-27-515) - 12 differences, the largest is module efficiency - [Trina Solar TSM-450 NEG9R.28 vs Trina Solar TSM-NEG18R.20-515](https://comparepv.com/compare/trina-solar-tsm-450-neg9r-28/trina-solar-co-ltd-tsm-neg18r-20-515) - 13 differences, the largest is module efficiency - [Trina Solar TSM-450 NEG9R.28 vs Trina Solar TSM-NEG18R.25-515](https://comparepv.com/compare/trina-solar-tsm-450-neg9r-28/trina-solar-co-ltd-tsm-neg18r-25-515) - 13 differences, the largest is module efficiency - [Trina Solar TSM-450 NEG9R.28 vs Trina Solar TSM-NEG18RC.27-510](https://comparepv.com/compare/trina-solar-tsm-450-neg9r-28/trina-solar-co-ltd-tsm-neg18rc-27-510) - 12 differences, the largest is rated power --- Source: https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg18r-28-520-1/trina-solar-tsm-450-neg9r-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.