--- title: "Tongwei TWMNF-66HD745 vs Tongwei TWMNH-66HS - Solar Panel Comparison | ComparePV" description: "Compare Tongwei TWMNF-66HD745 vs Tongwei TWMNH-66HS 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-66hd745/tongwei-twmnh-66hs" updated: 2026-09-11 --- # Tongwei TWMNF-66HD745 vs Tongwei TWMNH-66HS TWMNF-66HD745 leads on the differences that matter The largest is module efficiency: 0.86 pp more efficient. 7 of 18 comparable parameters are identical, with 1 more left out because at least one datasheet does not publish it. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Tongwei TWMNF-66HD745](https://comparepv.com/panel/tongwei-solar-twmnf-66hd745) | [Tongwei TWMNH-66HS](https://comparepv.com/panel/tongwei-twmnh-66hs) | | Manufacturer | Tongwei | Tongwei | | Power | 745 Wp | 625 Wp | | Efficiency | 24.00 % | 23.14 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | TWMNF-66HD745 | TWMNH-66HS | Difference | | --- | --- | --- | --- | | Module efficiency | 24.00 % | 23.14 % | +0.86 pp for TWMNF-66HD745 | | Rated power | 745 Wp | 625 Wp | +120 W for TWMNF-66HD745 | | Weight | 37.3 kg | 29.0 kg | -8.3 kg for TWMNH-66HS | | Power density | 239.8 Wp/m² | 231.4 Wp/m² | +8.5 Wp/m² for TWMNF-66HD745 | | Product warranty | 12 yrs | 15 yrs | +3 yrs for TWMNH-66HS | | Short-circuit current | 18.87 A | 16.14 A | 2.73 A apart | | Module area | 3.106 m² | 2.701 m² | 0.405 m² apart | | Weight per kWp | 50.1 kg/kWp | 46.4 kg/kWp | -3.7 kg/kWp for TWMNH-66HS | | Current at max power | 17.80 A | 15.33 A | 2.47 A apart | | Dimensions | 2384x1303x33 mm | 2382x1134x30 mm | 2384x1303x33 mm vs 2382x1134x30 mm | | Voltage at max power | 41.86 V | 40.77 V | 1.09 V apart | ## Every compared parameter | Parameter | TWMNF-66HD745 | TWMNH-66HS | | --- | --- | --- | | Rated power | 745 Wp | 625 Wp | | Module efficiency | 24.00 % | 23.14 % | | Power density | 239.8 Wp/m² | 231.4 Wp/m² | | Open-circuit voltage | 49.95 V | 49.25 V | | Voltage at max power | 41.86 V | 40.77 V | | Short-circuit current | 18.87 A | 16.14 A | | Current at max power | 17.80 A | 15.33 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2384x1303x33 mm | 2382x1134x30 mm | | Module area | 3.106 m² | 2.701 m² | | Weight | 37.3 kg | 29.0 kg | | Weight per kWp | 50.1 kg/kWp | 46.4 kg/kWp | | Product warranty | 12 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | - | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, 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-66HD745:** 24,996 kWh - **Cumulative output, TWMNH-66HS:** 20,970 kWh - **Gap:** 4,026 kWh ## Output when hot | Condition | Cell temperature | TWMNF-66HD745 | TWMNH-66HS | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 745 W | 625 W | 100.0% of rated power | | Cool, bright day | 40 °C | 714 W | 599 W | 95.8% of rated power | | Typical summer roof | 55 °C | 682 W | 573 W | 91.6% of rated power | | Hot roof | 70 °C | 651 W | 546 W | 87.4% of rated power | ## Against the whole database | Measure | TWMNF-66HD745 | TWMNH-66HS | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #303 | #1,509 | 14,005 | TWMNF-66HD745 leads by 1,206 places | | Power density | #339 | #1,513 | 14,005 | TWMNF-66HD745 leads by 1,174 places | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #3,586 | #1,141 | 14,005 | TWMNH-66HS leads by 2,445 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #148 | #1,789 | 14,005 | TWMNF-66HD745 leads by 1,641 places | ## Questions ### Which panel is better: Tongwei TWMNF-66HD745 or Tongwei TWMNH-66HS? According to our database: **Tongwei TWMNF-66HD745** has higher module efficiency (**24.00%** vs **23.14%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Tongwei TWMNF-66HD745 and Tongwei TWMNH-66HS? **Tongwei TWMNF-66HD745** has a module efficiency of **24.00%**, while **Tongwei TWMNH-66HS** is **23.14%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Tongwei TWMNF-66HD745 use vs Tongwei TWMNH-66HS? **Tongwei TWMNF-66HD745** uses **TOPCon** cells; **Tongwei TWMNH-66HS** 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-66HD745 and Tongwei TWMNH-66HS? **Tongwei TWMNF-66HD745** has a **30 years** power warranty; **Tongwei TWMNH-66HS** 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-66HD745 and Tongwei TWMNH-66HS bifacial panels? Both **Tongwei TWMNF-66HD745** and **Tongwei TWMNH-66HS** 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-66HD745 vs Tongwei TWMNF-66HD750](https://comparepv.com/compare/tongwei-solar-twmnf-66hd745/tongwei-solar-twmnf-66hd750) - The same specification on paper - [Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD740](https://comparepv.com/compare/tongwei-solar-twmnf-66hd745/tongwei-solar-twmnf-66hd740) - One difference: module efficiency - [Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD735](https://comparepv.com/compare/tongwei-solar-twmnf-66hd745/tongwei-solar-twmnf-66hd735) - 3 differences, the largest is module efficiency - [Tongwei TWMNF-66HD745 vs Tongwei TWMNF-66HD730](https://comparepv.com/compare/tongwei-solar-twmnf-66hd745/tongwei-solar-twmnf-66hd730) - 3 differences, the largest is module efficiency - [Tongwei TWMNH-66HS vs Tongwei THC G12-66 Bifacial](https://comparepv.com/compare/tongwei-twmnh-66hs/tongwei-thc-g12-66-bifacial) - 11 differences, the largest is module efficiency - [Tongwei TWMNH-66HS vs Tongwei TWMNF-66HD](https://comparepv.com/compare/tongwei-twmnh-66hs/tongwei-twmnf-66hd) - 7 differences, the largest is rated power --- Source: https://comparepv.com/compare/tongwei-solar-twmnf-66hd745/tongwei-twmnh-66hs 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.