--- title: "Tongwei TWMNF-66HD745 vs Tongwei TWMNH-48HW470 - Solar Panel Comparison | ComparePV" description: "Compare Tongwei TWMNF-66HD745 vs Tongwei TWMNH-48HW470 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-solar-twmnh-48hw470" updated: 2026-09-11 --- # Tongwei TWMNF-66HD745 vs Tongwei TWMNH-48HW470 TWMNF-66HD745 leads on the differences that matter The largest is rated power: 275 W more power. 5 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Tongwei TWMNF-66HD745](https://comparepv.com/panel/tongwei-solar-twmnf-66hd745) | [Tongwei TWMNH-48HW470](https://comparepv.com/panel/tongwei-solar-twmnh-48hw470) | | Manufacturer | Tongwei | Tongwei | | Power | 745 Wp | 470 Wp | | Efficiency | 24.00 % | 23.50 % | | Technology | TOPCon | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | TWMNF-66HD745 | TWMNH-48HW470 | Difference | | --- | --- | --- | --- | | Rated power | 745 Wp | 470 Wp | +275 W for TWMNF-66HD745 | | Module efficiency | 24.00 % | 23.50 % | +0.50 pp for TWMNF-66HD745 | | Weight | 37.3 kg | 23.7 kg | -13.6 kg for TWMNH-48HW470 | | Product warranty | 12 yrs | 15 yrs | +3 yrs for TWMNH-48HW470 | | Open-circuit voltage | 49.95 V | 36.55 V | 13.40 V apart | | Short-circuit current | 18.87 A | 15.95 A | 2.92 A apart | | Module area | 3.106 m² | 1.998 m² | 1.108 m² apart | | Power density | 239.8 Wp/m² | 235.2 Wp/m² | +4.6 Wp/m² for TWMNF-66HD745 | | Cell technology | TOPCon | N-type | TOPCon vs N-type | | Voltage at max power | 41.86 V | 30.80 V | 11.06 V apart | | Current at max power | 17.80 A | 15.26 A | 2.54 A apart | | Cell count | 132 | 96 | 36 cells apart | | Bifacial | Yes | No | Yes vs No | | Dimensions | 2384x1303x33 mm | 1762x1134x30 mm | 2384x1303x33 mm vs 1762x1134x30 mm | ## Every compared parameter | Parameter | TWMNF-66HD745 | TWMNH-48HW470 | | --- | --- | --- | | Rated power | 745 Wp | 470 Wp | | Module efficiency | 24.00 % | 23.50 % | | Power density | 239.8 Wp/m² | 235.2 Wp/m² | | Open-circuit voltage | 49.95 V | 36.55 V | | Voltage at max power | 41.86 V | 30.80 V | | Short-circuit current | 18.87 A | 15.95 A | | Current at max power | 17.80 A | 15.26 A | | Temperature coefficient | -0.280 %/°C | -0.280 %/°C | | Dimensions | 2384x1303x33 mm | 1762x1134x30 mm | | Module area | 3.106 m² | 1.998 m² | | Weight | 37.3 kg | 23.7 kg | | Weight per kWp | 50.1 kg/kWp | 50.4 kg/kWp | | Product warranty | 12 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.40 %/yr | | Cell technology | TOPCon | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 96 | | Bifacial | Yes | No | ## 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-66HD745:** 24,996 kWh - **Cumulative output, TWMNH-48HW470:** 15,769 kWh - **Gap:** 9,227 kWh ## Output when hot | Condition | Cell temperature | TWMNF-66HD745 | TWMNH-48HW470 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 745 W | 470 W | 100.0% of rated power | | Cool, bright day | 40 °C | 714 W | 450 W | 95.8% of rated power | | Typical summer roof | 55 °C | 682 W | 431 W | 91.6% of rated power | | Hot roof | 70 °C | 651 W | 411 W | 87.4% of rated power | ## Against the whole database | Measure | TWMNF-66HD745 | TWMNH-48HW470 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #303 | #716 | 14,005 | TWMNF-66HD745 leads by 413 places | | Power density | #339 | #674 | 14,005 | TWMNF-66HD745 leads by 335 places | | Heat behaviour | #1,309 | #1,309 | 14,005 | Tied - the same position in the database | | Weight | #3,586 | #3,804 | 14,005 | TWMNF-66HD745 leads by 218 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #148 | #6,415 | 14,005 | TWMNF-66HD745 leads by 6,267 places | ## Questions ### Which panel is better: Tongwei TWMNF-66HD745 or Tongwei TWMNH-48HW470? According to our database: **Tongwei TWMNF-66HD745** has higher module efficiency (**24.00%** vs **23.50%**). 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-48HW470? **Tongwei TWMNF-66HD745** has a module efficiency of **24.00%**, while **Tongwei TWMNH-48HW470** is **23.50%**. 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-48HW470? **Tongwei TWMNF-66HD745** uses **TOPCon** cells; **Tongwei TWMNH-48HW470** uses **N-type**. 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-48HW470? **Tongwei TWMNF-66HD745** has a **30 years** power warranty; **Tongwei TWMNH-48HW470** 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-48HW470 bifacial panels? **Tongwei TWMNF-66HD745** is bifacial (captures light from both faces); **Tongwei TWMNH-48HW470** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## 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-48HW470 vs Tongwei TWMNH-48HW475](https://comparepv.com/compare/tongwei-solar-twmnh-48hw470/tongwei-solar-twmnh-48hw475) - One difference: module efficiency - [Tongwei TWMNH-48HW470 vs Tongwei TWMNH-48HW465](https://comparepv.com/compare/tongwei-solar-twmnh-48hw470/tongwei-solar-twmnh-48hw465) - One difference: module efficiency --- Source: https://comparepv.com/compare/tongwei-solar-twmnf-66hd745/tongwei-solar-twmnh-48hw470 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.