--- title: "Trina Solar TSM-DE19R-585 vs Trina Solar TSM-DE19-550 - Solar Panel Comparison | ComparePV" description: "Compare Trina Solar TSM-DE19R-585 vs Trina Solar TSM-DE19-550 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-de19r-585/trina-solar-tsm-de19-550" updated: 2026-09-11 --- # Trina Solar TSM-DE19R-585 vs Trina Solar TSM-DE19-550 DE19R-585 leads on the differences that matter The largest is module efficiency: 0.70 pp more efficient. 8 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Trina Solar TSM-DE19R-585](https://comparepv.com/panel/trina-solar-co-ltd-tsm-de19r-585) | [Trina Solar TSM-DE19-550](https://comparepv.com/panel/trina-solar-tsm-de19-550) | | Manufacturer | Trina Solar | Trina Solar | | Power | 585 Wp | 550 Wp | | Efficiency | 21.70 % | 21.00 % | | Technology | PERC | PERC | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | DE19R-585 | DE19-550 | Difference | | --- | --- | --- | --- | | Module efficiency | 21.70 % | 21.00 % | +0.70 pp for DE19R-585 | | Rated power | 585 Wp | 550 Wp | +35 W for DE19R-585 | | Power density | 216.6 Wp/m² | 210.5 Wp/m² | +6.1 Wp/m² for DE19R-585 | | Open-circuit voltage | 46.60 V | 37.90 V | 8.70 V apart | | Short-circuit current | 15.99 A | 18.52 A | 2.53 A apart | | Module area | 2.701 m² | 2.613 m² | 0.088 m² apart | | Weight per kWp | 48.0 kg/kWp | 51.5 kg/kWp | -3.4 kg/kWp for DE19R-585 | | Voltage at max power | 39.30 V | 31.60 V | 7.70 V apart | | Current at max power | 14.90 A | 17.40 A | 2.50 A apart | | Cell count | 132 | 110 | 22 cells apart | | Dimensions | 2382x1134x30 mm | 2384x1096x30 mm | 2382x1134x30 mm vs 2384x1096x30 mm | ## Every compared parameter | Parameter | DE19R-585 | DE19-550 | | --- | --- | --- | | Rated power | 585 Wp | 550 Wp | | Module efficiency | 21.70 % | 21.00 % | | Power density | 216.6 Wp/m² | 210.5 Wp/m² | | Open-circuit voltage | 46.60 V | 37.90 V | | Voltage at max power | 39.30 V | 31.60 V | | Short-circuit current | 15.99 A | 18.52 A | | Current at max power | 14.90 A | 17.40 A | | Temperature coefficient | -0.340 %/°C | -0.340 %/°C | | Dimensions | 2382x1134x30 mm | 2384x1096x30 mm | | Module area | 2.701 m² | 2.613 m² | | Weight | 28.1 kg | 28.3 kg | | Weight per kWp | 48.0 kg/kWp | 51.5 kg/kWp | | Product warranty | 12 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 | 132 | 110 | | 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, DE19R-585:** 18,959 kWh - **Cumulative output, DE19-550:** 17,825 kWh - **Gap:** 1,134 kWh ## Output when hot | Condition | Cell temperature | DE19R-585 | DE19-550 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 585 W | 550 W | 100.0% of rated power | | Cool, bright day | 40 °C | 555 W | 522 W | 94.9% of rated power | | Typical summer roof | 55 °C | 525 W | 494 W | 89.8% of rated power | | Hot roof | 70 °C | 495 W | 466 W | 84.7% of rated power | ## Against the whole database | Measure | DE19R-585 | DE19-550 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,421 | #9,758 | 14,005 | DE19R-585 leads by 2,337 places | | Power density | #7,581 | #9,622 | 14,005 | DE19R-585 leads by 2,041 places | | Heat behaviour | #8,778 | #8,778 | 14,005 | Tied - the same position in the database | | Weight | #2,025 | #4,829 | 14,005 | DE19R-585 leads by 2,804 places | | Warranty | #9,798 | #9,798 | 14,005 | Tied - the same position in the database | | Overall | #6,122 | #8,437 | 14,005 | DE19R-585 leads by 2,315 places | ## Questions ### Which panel is better: Trina Solar TSM-DE19R-585 or Trina Solar TSM-DE19-550? According to our database: **Trina Solar TSM-DE19R-585** has higher module efficiency (**21.70%** vs **21.00%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Trina Solar TSM-DE19R-585 and Trina Solar TSM-DE19-550? **Trina Solar TSM-DE19R-585** has a module efficiency of **21.70%**, while **Trina Solar TSM-DE19-550** is **21.00%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Trina Solar TSM-DE19R-585 use vs Trina Solar TSM-DE19-550? **Trina Solar TSM-DE19R-585** uses **PERC** cells; **Trina Solar TSM-DE19-550** 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-DE19R-585 and Trina Solar TSM-DE19-550? **Trina Solar TSM-DE19R-585** has a **25 years** power warranty; **Trina Solar TSM-DE19-550** 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-DE19R-585 vs Trina Solar TSM-DE19R-580](https://comparepv.com/compare/trina-solar-co-ltd-tsm-de19r-585/trina-solar-co-ltd-tsm-de19r-580) - One difference: module efficiency - [Trina Solar TSM-DE19R-585 vs Trina Solar TSM-DE19R-575](https://comparepv.com/compare/trina-solar-co-ltd-tsm-de19r-585/trina-solar-co-ltd-tsm-de19r-575) - 3 differences, the largest is module efficiency - [Trina Solar TSM-DE19R-585 vs Trina Solar TSM-DE19R-570](https://comparepv.com/compare/trina-solar-co-ltd-tsm-de19r-585/trina-solar-co-ltd-tsm-de19r-570) - 3 differences, the largest is module efficiency - [Trina Solar TSM-DE19R-585 vs Trina Solar TSM-DE19R-565](https://comparepv.com/compare/trina-solar-co-ltd-tsm-de19r-585/trina-solar-co-ltd-tsm-de19r-565) - 5 differences, the largest is module efficiency - [Trina Solar TSM-DE19-550 vs Trina Solar TSM-DE19-560](https://comparepv.com/compare/trina-solar-tsm-de19-550/trina-solar-tsm-de19-560) - 3 differences, the largest is module efficiency - [Trina Solar TSM-DE19-550 vs Trina Solar TSM-DE19-555](https://comparepv.com/compare/trina-solar-tsm-de19-550/trina-solar-tsm-de19-555) - One difference: module efficiency --- Source: https://comparepv.com/compare/trina-solar-co-ltd-tsm-de19r-585/trina-solar-tsm-de19-550 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.