--- title: "Tongwei TWMNH-66HD630 vs Tongwei TWMHF-66HD735X - Solar Panel Comparison | ComparePV" description: "Compare Tongwei TWMNH-66HD630 vs Tongwei TWMHF-66HD735X 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-twmnh-66hd630/tw-solar-twmhf-66hd735x" updated: 2026-09-11 --- # Tongwei TWMNH-66HD630 vs Tongwei TWMHF-66HD735X TWMHF-66HD735X leads on the differences that matter The largest is temperature coefficient: 0.040 %/°C better in heat. 6 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Tongwei TWMNH-66HD630](https://comparepv.com/panel/tongwei-solar-twmnh-66hd630) | [Tongwei TWMHF-66HD735X](https://comparepv.com/panel/tw-solar-twmhf-66hd735x) | | Manufacturer | Tongwei | Tongwei | | Power | 630 Wp | 735 Wp | | Efficiency | 23.30 % | 23.70 % | | Technology | TOPCon | N-type | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | TWMNH-66HD630 | TWMHF-66HD735X | Difference | | --- | --- | --- | --- | | Temperature coefficient | -0.280 %/°C | -0.240 %/°C | +0.040 %/°C for TWMHF-66HD735X | | Rated power | 630 Wp | 735 Wp | +105 W for TWMHF-66HD735X | | Weight | 32.5 kg | 37.0 kg | -4.5 kg for TWMNH-66HD630 | | Module efficiency | 23.30 % | 23.70 % | +0.40 pp for TWMHF-66HD735X | | Product warranty | 12 yrs | 15 yrs | +3 yrs for TWMHF-66HD735X | | Short-circuit current | 16.18 A | 18.37 A | 2.19 A apart | | Module area | 2.701 m² | 3.106 m² | 0.405 m² apart | | Cell technology | TOPCon | N-type | TOPCon vs N-type | | Power density | 233.2 Wp/m² | 236.6 Wp/m² | +3.4 Wp/m² for TWMHF-66HD735X | | Current at max power | 15.33 A | 17.41 A | 2.08 A apart | | Open-circuit voltage | 49.50 V | 50.54 V | 1.04 V apart | | Dimensions | 2382x1134x30 mm | 2384x1303x33 mm | 2382x1134x30 mm vs 2384x1303x33 mm | | Voltage at max power | 41.10 V | 42.22 V | 1.12 V apart | ## Every compared parameter | Parameter | TWMNH-66HD630 | TWMHF-66HD735X | | --- | --- | --- | | Rated power | 630 Wp | 735 Wp | | Module efficiency | 23.30 % | 23.70 % | | Power density | 233.2 Wp/m² | 236.6 Wp/m² | | Open-circuit voltage | 49.50 V | 50.54 V | | Voltage at max power | 41.10 V | 42.22 V | | Short-circuit current | 16.18 A | 18.37 A | | Current at max power | 15.33 A | 17.41 A | | Temperature coefficient | -0.280 %/°C | -0.240 %/°C | | Dimensions | 2382x1134x30 mm | 2384x1303x33 mm | | Module area | 2.701 m² | 3.106 m² | | Weight | 32.5 kg | 37.0 kg | | Weight per kWp | 51.6 kg/kWp | 50.3 kg/kWp | | Product warranty | 12 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.40 %/yr | 0.38 %/yr | | Cell technology | TOPCon | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 132 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, TWMNH-66HD630:** 21,138 kWh - **Cumulative output, TWMHF-66HD735X:** 24,757 kWh - **Gap:** 3,619 kWh ## Output when hot | Condition | Cell temperature | TWMNH-66HD630 | TWMHF-66HD735X | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 630 W | 735 W | 100.0% of rated power | | Cool, bright day | 40 °C | 604 W | 709 W | 95.8% of rated power | | Typical summer roof | 55 °C | 577 W | 682 W | 91.6% of rated power | | Hot roof | 70 °C | 551 W | 656 W | 87.4% of rated power | ## Against the whole database | Measure | TWMNH-66HD630 | TWMHF-66HD735X | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,017 | #517 | 14,005 | TWMHF-66HD735X leads by 500 places | | Power density | #1,003 | #582 | 14,005 | TWMHF-66HD735X leads by 421 places | | Heat behaviour | #1,309 | #13 | 14,005 | TWMHF-66HD735X leads by 1,296 places | | Weight | #4,960 | #3,719 | 14,005 | TWMHF-66HD735X leads by 1,241 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,962 | #155 | 14,005 | TWMHF-66HD735X leads by 1,807 places | ## Questions ### Which panel is better: Tongwei TWMNH-66HD630 or Tongwei TWMHF-66HD735X? According to our database: **Tongwei TWMHF-66HD735X** has higher module efficiency (**23.70%** vs **23.30%**); **Tongwei TWMHF-66HD735X** tolerates heat better (temp coeff **-0.240%/°C** vs **-0.280%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Tongwei TWMNH-66HD630 and Tongwei TWMHF-66HD735X? **Tongwei TWMNH-66HD630** has a module efficiency of **23.30%**, while **Tongwei TWMHF-66HD735X** is **23.70%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Tongwei TWMNH-66HD630 use vs Tongwei TWMHF-66HD735X? **Tongwei TWMNH-66HD630** uses **TOPCon** cells; **Tongwei TWMHF-66HD735X** 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 TWMNH-66HD630 and Tongwei TWMHF-66HD735X? **Tongwei TWMNH-66HD630** has a **30 years** power warranty; **Tongwei TWMHF-66HD735X** 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 TWMNH-66HD630 and Tongwei TWMHF-66HD735X bifacial panels? Both **Tongwei TWMNH-66HD630** and **Tongwei TWMHF-66HD735X** 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 TWMNH-66HD630 vs Tongwei TWMNF-66HD750](https://comparepv.com/compare/tongwei-solar-twmnh-66hd630/tongwei-solar-twmnf-66hd750) - 8 differences, the largest is module efficiency - [Tongwei TWMNH-66HD630 vs Tongwei TWMNF-66HD745](https://comparepv.com/compare/tongwei-solar-twmnh-66hd630/tongwei-solar-twmnf-66hd745) - 8 differences, the largest is module efficiency - [Tongwei TWMNH-66HD630 vs Tongwei TWMNF-66HD740](https://comparepv.com/compare/tongwei-solar-twmnh-66hd630/tongwei-solar-twmnf-66hd740) - 8 differences, the largest is rated power - [Tongwei TWMNH-66HD630 vs Tongwei TWMHF-66HD740X](https://comparepv.com/compare/tongwei-solar-twmnh-66hd630/tw-solar-twmhf-66hd740x) - 13 differences, the largest is temperature coefficient - [Tongwei TWMNH-66HD630 vs Tongwei TWMNF-66HD735](https://comparepv.com/compare/tongwei-solar-twmnh-66hd630/tongwei-solar-twmnf-66hd735) - 8 differences, the largest is rated power - [Tongwei TWMNH-66HD630 vs Tongwei TWMHF-66HD730X](https://comparepv.com/compare/tongwei-solar-twmnh-66hd630/tw-solar-twmhf-66hd730x) - 11 differences, the largest is temperature coefficient --- Source: https://comparepv.com/compare/tongwei-solar-twmnh-66hd630/tw-solar-twmhf-66hd735x 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.