--- title: "Trina Solar TSM-NE19R-645 vs Trina Solar TSM-NEG19RC.20Q - Solar Panel Comparison | ComparePV" description: "Compare Trina Solar TSM-NE19R-645 vs Trina Solar TSM-NEG19RC.20Q 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-ne19r-645/trina-solar-tsm-neg19rc-20q" updated: 2026-09-11 --- # Trina Solar TSM-NE19R-645 vs Trina Solar TSM-NEG19RC.20Q NEG19RC.20Q leads on the differences that matter The largest is module efficiency: 1.00 pp more efficient. 7 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Trina Solar TSM-NE19R-645](https://comparepv.com/panel/trina-solar-tsm-ne19r-645) | [Trina Solar TSM-NEG19RC.20Q](https://comparepv.com/panel/trina-solar-tsm-neg19rc-20q) | | Manufacturer | Trina Solar | Trina Solar | | Power | 645 Wp | 670 Wp | | Efficiency | 23.80 % | 24.80 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | NE19R-645 | NEG19RC.20Q | Difference | | --- | --- | --- | --- | | Module efficiency | 23.80 % | 24.80 % | +1.00 pp for NEG19RC.20Q | | Performance warranty | 25 yrs | 30 yrs | +5 yrs for NEG19RC.20Q | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | +0.030 %/°C for NEG19RC.20Q | | Power density | 238.8 Wp/m² | 248.0 Wp/m² | +9.3 Wp/m² for NEG19RC.20Q | | Weight | 27.9 kg | 33.0 kg | -5.1 kg for NE19R-645 | | Rated power | 645 Wp | 670 Wp | +25 W for NEG19RC.20Q | | Weight per kWp | 43.3 kg/kWp | 49.3 kg/kWp | -6.0 kg/kWp for NE19R-645 | | Annual degradation | 0.40 %/yr | 0.35 %/yr | -0.05 %/yr for NEG19RC.20Q | | Cell count | 132 | 264 | 132 cells apart | | Bifacial | No | Yes | No vs Yes | | Short-circuit current | 15.99 A | 16.60 A | 0.61 A apart | | Current at max power | 15.04 A | 15.94 A | 0.90 A apart | ## Every compared parameter | Parameter | NE19R-645 | NEG19RC.20Q | | --- | --- | --- | | Rated power | 645 Wp | 670 Wp | | Module efficiency | 23.80 % | 24.80 % | | Power density | 238.8 Wp/m² | 248.0 Wp/m² | | Open-circuit voltage | 51.20 V | 50.95 V | | Voltage at max power | 42.90 V | 42.04 V | | Short-circuit current | 15.99 A | 16.60 A | | Current at max power | 15.04 A | 15.94 A | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 27.9 kg | 33.0 kg | | Weight per kWp | 43.3 kg/kWp | 49.3 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 25 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.35 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 264 | | Bifacial | No | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, NE19R-645:** 21,641 kWh - **Cumulative output, NEG19RC.20Q:** 22,655 kWh - **Gap:** 1,014 kWh ## Output when hot | Condition | Cell temperature | NE19R-645 | NEG19RC.20Q | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 645 W | 670 W | 100.0% of rated power | | Cool, bright day | 40 °C | 617 W | 644 W | 95.7% of rated power | | Typical summer roof | 55 °C | 589 W | 618 W | 91.3% of rated power | | Hot roof | 70 °C | 561 W | 592 W | 87.0% of rated power | ## Against the whole database | Measure | NE19R-645 | NEG19RC.20Q | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #433 | #12 | 14,005 | NEG19RC.20Q leads by 421 places | | Power density | #356 | #14 | 14,005 | NEG19RC.20Q leads by 342 places | | Heat behaviour | #2,165 | #511 | 14,005 | NEG19RC.20Q leads by 1,654 places | | Weight | #285 | #2,825 | 14,005 | NE19R-645 leads by 2,540 places | | Warranty | #9,798 | #21 | 14,005 | NEG19RC.20Q leads by 9,777 places | | Overall | #1,888 | #490 | 14,005 | NEG19RC.20Q leads by 1,398 places | ## Questions ### Which panel is better: Trina Solar TSM-NE19R-645 or Trina Solar TSM-NEG19RC.20Q? According to our database: **Trina Solar TSM-NEG19RC.20Q** has higher module efficiency (**24.80%** vs **23.80%**); **Trina Solar TSM-NEG19RC.20Q** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.290%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Trina Solar TSM-NE19R-645 and Trina Solar TSM-NEG19RC.20Q? **Trina Solar TSM-NE19R-645** has a module efficiency of **23.80%**, while **Trina Solar TSM-NEG19RC.20Q** is **24.80%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Trina Solar TSM-NE19R-645 use vs Trina Solar TSM-NEG19RC.20Q? **Trina Solar TSM-NE19R-645** uses **TOPCon** cells; **Trina Solar TSM-NEG19RC.20Q** 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-NE19R-645 and Trina Solar TSM-NEG19RC.20Q? **Trina Solar TSM-NE19R-645** has a **25 years** power warranty; **Trina Solar TSM-NEG19RC.20Q** 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-NE19R-645 and Trina Solar TSM-NEG19RC.20Q bifacial panels? **Trina Solar TSM-NEG19RC.20Q** is bifacial (captures light from both faces); **Trina Solar TSM-NE19R-645** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Trina Solar TSM-NE19R-645 vs Trina Solar TSM-NEG19RC.20-650](https://comparepv.com/compare/trina-solar-tsm-ne19r-645/trina-solar-co-ltd-tsm-neg19rc-20-650) - 9 differences, the largest is performance warranty - [Trina Solar TSM-NE19R-645 vs Trina Solar TSM-NE19R-650](https://comparepv.com/compare/trina-solar-tsm-ne19r-645/trina-solar-tsm-ne19r-650) - One difference: module efficiency - [Trina Solar TSM-NE19R-645 vs Trina Solar TSM-NEG19RC.20-645](https://comparepv.com/compare/trina-solar-tsm-ne19r-645/trina-solar-co-ltd-tsm-neg19rc-20-645) - 8 differences, the largest is performance warranty - [Trina Solar TSM-NE19R-645 vs Trina Solar TSM-NED19RC.20](https://comparepv.com/compare/trina-solar-tsm-ne19r-645/trina-solar-tsm-ned19rc-20) - 8 differences, the largest is performance warranty - [Trina Solar TSM-NE19R-645 vs Trina Solar TSM-NEG19RC.20-640](https://comparepv.com/compare/trina-solar-tsm-ne19r-645/trina-solar-co-ltd-tsm-neg19rc-20-640) - 8 differences, the largest is performance warranty - [Trina Solar TSM-NE19R-645 vs Trina Solar TSM-NE19R-640](https://comparepv.com/compare/trina-solar-tsm-ne19r-645/trina-solar-tsm-ne19r-640) - The same specification on paper --- Source: https://comparepv.com/compare/trina-solar-tsm-ne19r-645/trina-solar-tsm-neg19rc-20q 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.