--- title: "Trina Solar TSM-DEG21C.20-655 vs Trina Solar TSM-NEG21C.20Q-760 - Solar Panel Comparison | ComparePV" description: "Compare Trina Solar TSM-DEG21C.20-655 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-deg21c-20-655/trina-solar-tsm-neg21c-20q-760" updated: 2026-09-11 --- # Trina Solar TSM-DEG21C.20-655 vs Trina Solar TSM-NEG21C.20Q-760 NEG21C.20Q-760 leads on the differences that matter The largest is module efficiency: 3.40 pp more efficient. 9 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Trina Solar TSM-DEG21C.20-655](https://comparepv.com/panel/trina-solar-co-ltd-tsm-deg21c-20-655) | [Trina Solar TSM-NEG21C.20Q-760](https://comparepv.com/panel/trina-solar-tsm-neg21c-20q-760) | | Manufacturer | Trina Solar | Trina Solar | | Power | 655 Wp | 760 Wp | | Efficiency | 21.10 % | 24.50 % | | Technology | PERC | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | DEG21C.20-655 | NEG21C.20Q-760 | Difference | | --- | --- | --- | --- | | Module efficiency | 21.10 % | 24.50 % | +3.40 pp for NEG21C.20Q-760 | | Temperature coefficient | -0.340 %/°C | -0.260 %/°C | +0.080 %/°C for NEG21C.20Q-760 | | Rated power | 655 Wp | 760 Wp | +105 W for NEG21C.20Q-760 | | Power density | 210.9 Wp/m² | 244.7 Wp/m² | +33.8 Wp/m² for NEG21C.20Q-760 | | Weight per kWp | 58.5 kg/kWp | 50.4 kg/kWp | -8.1 kg/kWp for NEG21C.20Q-760 | | Annual degradation | 0.45 %/yr | 0.35 %/yr | -0.10 %/yr for NEG21C.20Q-760 | | Open-circuit voltage | 45.70 V | 50.90 V | 5.20 V apart | | Cell technology | PERC | TOPCon | PERC vs TOPCon | | Voltage at max power | 37.90 V | 42.90 V | 5.00 V apart | | Cell count | 132 | 264 | 132 cells apart | ## Every compared parameter | Parameter | DEG21C.20-655 | NEG21C.20Q-760 | | --- | --- | --- | | Rated power | 655 Wp | 760 Wp | | Module efficiency | 21.10 % | 24.50 % | | Power density | 210.9 Wp/m² | 244.7 Wp/m² | | Open-circuit voltage | 45.70 V | 50.90 V | | Voltage at max power | 37.90 V | 42.90 V | | Short-circuit current | 18.40 A | 18.85 A | | Current at max power | 17.31 A | 17.72 A | | Temperature coefficient | -0.340 %/°C | -0.260 %/°C | | Dimensions | 2384x1303x33 mm | 2384x1303x33 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 38.3 kg | 38.3 kg | | Weight per kWp | 58.5 kg/kWp | 50.4 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.45 %/yr | 0.35 %/yr | | Cell technology | PERC | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 264 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, DEG21C.20-655:** 21,570 kWh - **Cumulative output, NEG21C.20Q-760:** 25,698 kWh - **Gap:** 4,128 kWh ## Output when hot | Condition | Cell temperature | DEG21C.20-655 | NEG21C.20Q-760 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 655 W | 760 W | 100.0% of rated power | | Cool, bright day | 40 °C | 622 W | 730 W | 94.9% of rated power | | Typical summer roof | 55 °C | 588 W | 701 W | 89.8% of rated power | | Hot roof | 70 °C | 555 W | 671 W | 84.7% of rated power | ## Against the whole database | Measure | DEG21C.20-655 | NEG21C.20Q-760 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #9,297 | #74 | 14,005 | NEG21C.20Q-760 leads by 9,223 places | | Power density | #9,459 | #86 | 14,005 | NEG21C.20Q-760 leads by 9,373 places | | Heat behaviour | #8,778 | #511 | 14,005 | NEG21C.20Q-760 leads by 8,267 places | | Weight | #11,751 | #3,780 | 14,005 | NEG21C.20Q-760 leads by 7,971 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #3,525 | #66 | 14,005 | NEG21C.20Q-760 leads by 3,459 places | ## Questions ### Which panel is better: Trina Solar TSM-DEG21C.20-655 or Trina Solar TSM-NEG21C.20Q-760? According to our database: **Trina Solar TSM-NEG21C.20Q-760** has higher module efficiency (**24.50%** vs **21.10%**); **Trina Solar TSM-NEG21C.20Q-760** tolerates heat better (temp coeff **-0.260%/°C** vs **-0.340%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Trina Solar TSM-DEG21C.20-655 and Trina Solar TSM-NEG21C.20Q-760? **Trina Solar TSM-DEG21C.20-655** has a module efficiency of **21.10%**, 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-DEG21C.20-655 use vs Trina Solar TSM-NEG21C.20Q-760? **Trina Solar TSM-DEG21C.20-655** uses **PERC** 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-DEG21C.20-655 and Trina Solar TSM-NEG21C.20Q-760? **Trina Solar TSM-DEG21C.20-655** 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-DEG21C.20-655 and Trina Solar TSM-NEG21C.20Q-760 bifacial panels? Both **Trina Solar TSM-DEG21C.20-655** 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-DEG21C.20-655 vs Trina Solar TSM-DEG21C.20-665](https://comparepv.com/compare/trina-solar-co-ltd-tsm-deg21c-20-655/trina-solar-co-ltd-tsm-deg21c-20-665) - 3 differences, the largest is module efficiency - [Trina Solar TSM-DEG21C.20-655 vs Trina Solar TSM-DEG21C.20-660](https://comparepv.com/compare/trina-solar-co-ltd-tsm-deg21c-20-655/trina-solar-co-ltd-tsm-deg21c-20-660) - The same specification on paper - [Trina Solar TSM-DEG21C.20-655 vs Trina Solar TSM-DEG21C.20-650](https://comparepv.com/compare/trina-solar-co-ltd-tsm-deg21c-20-655/trina-solar-co-ltd-tsm-deg21c-20-650) - One difference: module efficiency - [Trina Solar TSM-DEG21C.20-655 vs Trina Solar TSM-DEG21C.20-645](https://comparepv.com/compare/trina-solar-co-ltd-tsm-deg21c-20-655/trina-solar-co-ltd-tsm-deg21c-20-645) - 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 - [Trina Solar TSM-NEG21C.20Q-760 vs Trina Solar TSM-NEG21C.20Q-750](https://comparepv.com/compare/trina-solar-tsm-neg21c-20q-760/trina-solar-tsm-neg21c-20q-750) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/trina-solar-co-ltd-tsm-deg21c-20-655/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.