--- title: "Tongwei TWMNF-66HD735 vs Tongwei TWMND-72 HD575 - Solar Panel Comparison | ComparePV" description: "Compare Tongwei TWMNF-66HD735 vs Tongwei TWMND-72 HD575 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/tongwei-solar-twmnf-66hd735/tongwei-twmnd-72-hd575" updated: 2026-09-11 --- # Tongwei TWMNF-66HD735 vs Tongwei TWMND-72 HD575 TWMNF-66HD735 leads on the differences that matter The largest is module efficiency: 1.40 pp more efficient. 7 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Tongwei TWMNF-66HD735](https://comparepv.com/panel/tongwei-solar-twmnf-66hd735) | [Tongwei TWMND-72 HD575](https://comparepv.com/panel/tongwei-twmnd-72-hd575) | | Manufacturer | Tongwei | Tongwei | | Power | 735 Wp | 575 Wp | | Efficiency | 23.70 % | 22.30 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | TWMNF-66HD735 | TWMND-72 HD575 | Difference | | --- | --- | --- | --- | | Module efficiency | 23.70 % | 22.30 % | +1.40 pp for TWMNF-66HD735 | | Rated power | 735 Wp | 575 Wp | +160 W for TWMNF-66HD735 | | Power density | 236.6 Wp/m² | 222.6 Wp/m² | +14.0 Wp/m² for TWMNF-66HD735 | | Weight | 37.3 kg | 31.5 kg | -5.8 kg for TWMND-72 HD575 | | Short-circuit current | 18.75 A | 13.80 A | 4.95 A apart | | Module area | 3.106 m² | 2.583 m² | 0.523 m² apart | | Weight per kWp | 50.7 kg/kWp | 54.8 kg/kWp | -4.0 kg/kWp for TWMNF-66HD735 | | Open-circuit voltage | 49.65 V | 52.10 V | 2.45 V apart | | Current at max power | 17.70 A | 13.14 A | 4.56 A apart | | Cell count | 132 | 144 | 12 cells apart | | Voltage at max power | 41.53 V | 43.76 V | 2.23 V apart | | Dimensions | 2384x1303x33 mm | 2278x1134x30 mm | 2384x1303x33 mm vs 2278x1134x30 mm | ## Every compared parameter | Parameter | TWMNF-66HD735 | TWMND-72 HD575 | | --- | --- | --- | | Rated power | 735 Wp | 575 Wp | | Module efficiency | 23.70 % | 22.30 % | | Power density | 236.6 Wp/m² | 222.6 Wp/m² | | Open-circuit voltage | 49.65 V | 52.10 V | | Voltage at max power | 41.53 V | 43.76 V | | Short-circuit current | 18.75 A | 13.80 A | | Current at max power | 17.70 A | 13.14 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2384x1303x33 mm | 2278x1134x30 mm | | Module area | 3.106 m² | 2.583 m² | | Weight | 37.3 kg | 31.5 kg | | Weight per kWp | 50.7 kg/kWp | 54.8 kg/kWp | | Product warranty | 12 yrs | 12 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 | 132 | 144 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.280 %/°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, TWMNF-66HD735:** 24,661 kWh - **Cumulative output, TWMND-72 HD575:** 19,292 kWh - **Gap:** 5,369 kWh ## Output when hot | Condition | Cell temperature | TWMNF-66HD735 | TWMND-72 HD575 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 735 W | 575 W | 100.0% of rated power | | Cool, bright day | 40 °C | 704 W | 551 W | 95.8% of rated power | | Typical summer roof | 55 °C | 673 W | 527 W | 91.6% of rated power | | Hot roof | 70 °C | 642 W | 503 W | 87.4% of rated power | ## Against the whole database | Measure | TWMNF-66HD735 | TWMND-72 HD575 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #517 | #5,100 | 14,005 | TWMNF-66HD735 leads by 4,583 places | | Power density | #582 | #5,549 | 14,005 | TWMNF-66HD735 leads by 4,967 places | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #4,162 | #9,174 | 14,005 | TWMNF-66HD735 leads by 5,012 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #231 | #4,866 | 14,005 | TWMNF-66HD735 leads by 4,635 places | ## Questions ### Which panel is better: Tongwei TWMNF-66HD735 or Tongwei TWMND-72 HD575? According to our database: **Tongwei TWMNF-66HD735** has higher module efficiency (**23.70%** vs **22.30%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Tongwei TWMNF-66HD735 and Tongwei TWMND-72 HD575? **Tongwei TWMNF-66HD735** has a module efficiency of **23.70%**, while **Tongwei TWMND-72 HD575** is **22.30%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Tongwei TWMNF-66HD735 use vs Tongwei TWMND-72 HD575? **Tongwei TWMNF-66HD735** uses **TOPCon** cells; **Tongwei TWMND-72 HD575** 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 Tongwei TWMNF-66HD735 and Tongwei TWMND-72 HD575? **Tongwei TWMNF-66HD735** has a **30 years** power warranty; **Tongwei TWMND-72 HD575** 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 Tongwei TWMNF-66HD735 and Tongwei TWMND-72 HD575 bifacial panels? Both **Tongwei TWMNF-66HD735** and **Tongwei TWMND-72 HD575** 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 - [Tongwei TWMNF-66HD735 vs Tongwei TWMNF-66HD750](https://comparepv.com/compare/tongwei-solar-twmnf-66hd735/tongwei-solar-twmnf-66hd750) - 3 differences, the largest is module efficiency - [Tongwei TWMNF-66HD735 vs Tongwei TWMNF-66HD745](https://comparepv.com/compare/tongwei-solar-twmnf-66hd735/tongwei-solar-twmnf-66hd745) - 3 differences, the largest is module efficiency - [Tongwei TWMNF-66HD735 vs Tongwei TWMNF-66HD740](https://comparepv.com/compare/tongwei-solar-twmnf-66hd735/tongwei-solar-twmnf-66hd740) - The same specification on paper - [Tongwei TWMNF-66HD735 vs Tongwei TWMNF-66HD730](https://comparepv.com/compare/tongwei-solar-twmnf-66hd735/tongwei-solar-twmnf-66hd730) - One difference: module efficiency - [Tongwei TWMND-72 HD575 vs Tongwei TWMNF-66HD725](https://comparepv.com/compare/tongwei-twmnd-72-hd575/tongwei-solar-twmnf-66hd725) - 12 differences, the largest is module efficiency - [Tongwei TWMND-72 HD575 vs Tongwei TWMNF-66HD720](https://comparepv.com/compare/tongwei-twmnd-72-hd575/tongwei-solar-twmnf-66hd720) - 12 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/tongwei-solar-twmnf-66hd735/tongwei-twmnd-72-hd575 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.