--- title: "Trina Solar TSM-NEG18R.28-490 vs Trina Solar TSM-NEG18R.28-495 - Solar Panel Comparison | ComparePV" description: "Compare Trina Solar TSM-NEG18R.28-490 vs Trina Solar TSM-NEG18R.28-495 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-28-490-1/trina-solar-co-ltd-tsm-neg18r-28-495-1" updated: 2026-09-11 --- # Trina Solar TSM-NEG18R.28-490 vs Trina Solar TSM-NEG18R.28-495 495 leads on the differences that matter The largest is module efficiency: 0.30 pp more efficient. 18 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Trina Solar TSM-NEG18R.28-490](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg18r-28-490-1) | [Trina Solar TSM-NEG18R.28-495](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg18r-28-495-1) | | Manufacturer | Trina Solar | Trina Solar | | Power | 490 Wp | 495 Wp | | Efficiency | 22.00 % | 22.30 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 490 | 495 | Difference | | --- | --- | --- | --- | | Module efficiency | 22.00 % | 22.30 % | +0.30 pp for 495 | ## Every compared parameter | Parameter | 490 | 495 | | --- | --- | --- | | Rated power | 490 Wp | 495 Wp | | Module efficiency | 22.00 % | 22.30 % | | Power density | 220.3 Wp/m² | 222.6 Wp/m² | | Open-circuit voltage | 39.60 V | 39.80 V | | Voltage at max power | 32.90 V | 33.10 V | | Short-circuit current | 15.80 A | 15.83 A | | Current at max power | 14.91 A | 14.97 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 | 48.0 kg/kWp | 47.5 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, 490:** 16,440 kWh - **Cumulative output, 495:** 16,608 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | 490 | 495 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 490 W | 495 W | 100.0% of rated power | | Cool, bright day | 40 °C | 469 W | 473 W | 95.7% of rated power | | Typical summer roof | 55 °C | 447 W | 452 W | 91.3% of rated power | | Hot roof | 70 °C | 426 W | 430 W | 87.0% of rated power | ## Against the whole database | Measure | 490 | 495 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #6,517 | #5,100 | 14,005 | 495 leads by 1,417 places | | Power density | #6,276 | #5,521 | 14,005 | 495 leads by 755 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #1,984 | #1,708 | 14,005 | 495 leads by 276 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #7,493 | #6,915 | 14,005 | 495 leads by 578 places | ## Questions ### Which panel is better: Trina Solar TSM-NEG18R.28-490 or Trina Solar TSM-NEG18R.28-495? According to our database: **Trina Solar TSM-NEG18R.28-495** has higher module efficiency (**22.30%** vs **22.00%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Trina Solar TSM-NEG18R.28-490 and Trina Solar TSM-NEG18R.28-495? **Trina Solar TSM-NEG18R.28-490** has a module efficiency of **22.00%**, while **Trina Solar TSM-NEG18R.28-495** is **22.30%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Trina Solar TSM-NEG18R.28-490 use vs Trina Solar TSM-NEG18R.28-495? **Trina Solar TSM-NEG18R.28-490** uses **TOPCon** cells; **Trina Solar TSM-NEG18R.28-495** 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.28-490 and Trina Solar TSM-NEG18R.28-495? **Trina Solar TSM-NEG18R.28-490** has a **30 years** power warranty; **Trina Solar TSM-NEG18R.28-495** 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.28-490 vs Trina Solar TSM-NEG18R.28-510](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg18r-28-490-1/trina-solar-co-ltd-tsm-neg18r-28-510-1) - 4 differences, the largest is module efficiency - [Trina Solar TSM-NEG18R.28-490 vs Trina Solar TSM-NEG18R.28-505](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg18r-28-490-1/trina-solar-co-ltd-tsm-neg18r-28-505-1) - 3 differences, the largest is module efficiency - [Trina Solar TSM-NEG18R.28-490 vs Trina Solar TSM-NEG18R.28-500](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg18r-28-490-1/trina-solar-co-ltd-tsm-neg18r-28-500-1) - 3 differences, the largest is module efficiency - [Trina Solar TSM-NEG18R.28-490 vs Trina Solar TSM-NEG18R.28-485](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg18r-28-490-1/trina-solar-co-ltd-tsm-neg18r-28-485-1) - One difference: module efficiency - [Trina Solar TSM-NEG18R.28-490 vs Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg18r-28-490-1/trina-solar-tsm-neg21c-20q-760) - 16 differences, the largest is module efficiency - [Trina Solar TSM-NEG18R.28-490 vs Trina Solar TSM-NEG21C.20Q-755](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg18r-28-490-1/trina-solar-tsm-neg21c-20q-755) - 16 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg18r-28-490-1/trina-solar-co-ltd-tsm-neg18r-28-495-1 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.