--- title: "Trina Solar TSM-NEG9RC.27-435 vs Trina Solar TSM-NEG21C.20Q-760 - Solar Panel Comparison | ComparePV" description: "Compare Trina Solar TSM-NEG9RC.27-435 vs Trina Solar TSM-NEG21C.20Q-760 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-neg9rc-27-435/trina-solar-tsm-neg21c-20q-760" updated: 2026-09-11 --- # Trina Solar TSM-NEG9RC.27-435 vs Trina Solar TSM-NEG21C.20Q-760 NEG21C.20Q-760 leads on the differences that matter The largest is module efficiency: 2.70 pp more efficient. 6 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Trina Solar TSM-NEG9RC.27-435](https://comparepv.com/panel/trina-solar-co-ltd-tsm-neg9rc-27-435) | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | | Manufacturer | Trina Solar | Trina Solar | | Power | 435 Wp | 760 Wp | | Efficiency | 21.80 % | 24.50 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | NEG9RC.27-435 | NEG21C.20Q-760 | Difference | | --- | --- | --- | --- | | Module efficiency | 21.80 % | 24.50 % | +2.70 pp for NEG21C.20Q-760 | | Rated power | 435 Wp | 760 Wp | +325 W for NEG21C.20Q-760 | | Power density | 217.7 Wp/m² | 244.7 Wp/m² | +27.0 Wp/m² for NEG21C.20Q-760 | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | +0.030 %/°C for NEG21C.20Q-760 | | Weight | 21.0 kg | 38.3 kg | -17.3 kg for NEG9RC.27-435 | | Product warranty | 15 yrs | 12 yrs | +3 yrs for NEG9RC.27-435 | | Short-circuit current | 10.64 A | 18.85 A | 8.21 A apart | | Module area | 1.998 m² | 3.106 m² | 1.108 m² apart | | Annual degradation | 0.40 %/yr | 0.35 %/yr | -0.05 %/yr for NEG21C.20Q-760 | | Current at max power | 9.99 A | 17.72 A | 7.73 A apart | | Cell count | 144 | 264 | 120 cells apart | | Weight per kWp | 48.3 kg/kWp | 50.4 kg/kWp | -2.1 kg/kWp for NEG9RC.27-435 | | Dimensions | 1762x1134x30 mm | 2384x1303x33 mm | 1762x1134x30 mm vs 2384x1303x33 mm | ## Every compared parameter | Parameter | NEG9RC.27-435 | NEG21C.20Q-760 | | --- | --- | --- | | Rated power | 435 Wp | 760 Wp | | Module efficiency | 21.80 % | 24.50 % | | Power density | 217.7 Wp/m² | 244.7 Wp/m² | | Open-circuit voltage | 51.80 V | 50.90 V | | Voltage at max power | 43.60 V | 42.90 V | | Short-circuit current | 10.64 A | 18.85 A | | Current at max power | 9.99 A | 17.72 A | | Temperature coefficient | -0.290 %/°C | -0.260 %/°C | | Dimensions | 1762x1134x30 mm | 2384x1303x33 mm | | Module area | 1.998 m² | 3.106 m² | | Weight | 21.0 kg | 38.3 kg | | Weight per kWp | 48.3 kg/kWp | 50.4 kg/kWp | | Product warranty | 15 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.35 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 264 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, NEG9RC.27-435:** 14,595 kWh - **Cumulative output, NEG21C.20Q-760:** 25,698 kWh - **Gap:** 11,103 kWh ## Output when hot | Condition | Cell temperature | NEG9RC.27-435 | NEG21C.20Q-760 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 435 W | 760 W | 100.0% of rated power | | Cool, bright day | 40 °C | 416 W | 730 W | 95.7% of rated power | | Typical summer roof | 55 °C | 397 W | 701 W | 91.3% of rated power | | Hot roof | 70 °C | 378 W | 671 W | 87.0% of rated power | ## Against the whole database | Measure | NEG9RC.27-435 | NEG21C.20Q-760 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #7,022 | #74 | 14,005 | NEG21C.20Q-760 leads by 6,948 places | | Power density | #7,066 | #86 | 14,005 | NEG21C.20Q-760 leads by 6,980 places | | Heat behaviour | #2,165 | #511 | 14,005 | NEG21C.20Q-760 leads by 1,654 places | | Weight | #2,138 | #3,780 | 14,005 | NEG9RC.27-435 leads by 1,642 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #9,574 | #66 | 14,005 | NEG21C.20Q-760 leads by 9,508 places | ## Questions ### Which panel is better: Trina Solar TSM-NEG9RC.27-435 or Trina Solar TSM-NEG21C.20Q-760? According to our database: **Trina Solar TSM-NEG21C.20Q-760** has higher module efficiency (**24.50%** vs **21.80%**); **Trina Solar TSM-NEG21C.20Q-760** 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-NEG9RC.27-435 and Trina Solar TSM-NEG21C.20Q-760? **Trina Solar TSM-NEG9RC.27-435** has a module efficiency of **21.80%**, while **Trina Solar TSM-NEG21C.20Q-760** is **24.50%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Trina Solar TSM-NEG9RC.27-435 use vs Trina Solar TSM-NEG21C.20Q-760? **Trina Solar TSM-NEG9RC.27-435** uses **TOPCon** cells; **Trina Solar TSM-NEG21C.20Q-760** 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-NEG9RC.27-435 and Trina Solar TSM-NEG21C.20Q-760? **Trina Solar TSM-NEG9RC.27-435** has a **30 years** power warranty; **Trina Solar TSM-NEG21C.20Q-760** 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-NEG9RC.27-435 and Trina Solar TSM-NEG21C.20Q-760 bifacial panels? Both **Trina Solar TSM-NEG9RC.27-435** and **Trina Solar TSM-NEG21C.20Q-760** are bifacial - they capture reflected light from the ground, which can add 5**-15%** more annual energy on ground-mount or elevated rooftop installations with a light surface beneath. ## Related comparisons - [Trina Solar TSM-NEG9RC.27-435 vs Trina Solar TSM-NEG9RC.27-450](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg9rc-27-435/trina-solar-co-ltd-tsm-neg9rc-27-450) - 5 differences, the largest is module efficiency - [Trina Solar TSM-NEG9RC.27-435 vs Trina Solar TSM-NEG9RC.27-445](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg9rc-27-435/trina-solar-co-ltd-tsm-neg9rc-27-445) - 3 differences, the largest is module efficiency - [Trina Solar TSM-NEG9RC.27-435 vs Trina Solar TSM-NEG9RC.27-440](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg9rc-27-435/trina-solar-co-ltd-tsm-neg9rc-27-440) - One difference: module efficiency - [Trina Solar TSM-NEG9RC.27-435 vs Trina Solar TSM-NEG9RC.27-430](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg9rc-27-435/trina-solar-co-ltd-tsm-neg9rc-27-430) - One difference: module efficiency - [Trina Solar TSM-NEG9RC.27-435 vs Trina Solar TSM-NEG9RC.27-425](https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg9rc-27-435/trina-solar-co-ltd-tsm-neg9rc-27-425) - 3 differences, the largest is module efficiency - [Trina Solar TSM-NEG21C.20Q-760 vs Trina Solar TSM-NEG21C.20Q-755](https://comparepv.com/compare/trina-solar-tsm-neg21c-20q-760/trina-solar-tsm-neg21c-20q-755) - One difference: module efficiency --- Source: https://comparepv.com/compare/trina-solar-co-ltd-tsm-neg9rc-27-435/trina-solar-tsm-neg21c-20q-760 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.