--- title: "Huasun RS730S9-132GANT vs Tongwei TWMNF-66HD725 - Solar Panel Comparison | ComparePV" description: "Compare Huasun RS730S9-132GANT vs Tongwei TWMNF-66HD725 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/huasun-rs730s9-132gant/tongwei-solar-twmnf-66hd725" updated: 2026-09-11 --- # Huasun RS730S9-132GANT vs Tongwei TWMNF-66HD725 6 differences, and they point both ways The largest is temperature coefficient: 0.030 %/°C better in heat. 13 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Huasun RS730S9-132GANT](https://comparepv.com/panel/huasun-rs730s9-132gant) | [Tongwei TWMNF-66HD725](https://comparepv.com/panel/tongwei-solar-twmnf-66hd725) | | Manufacturer | Huasun | Tongwei | | Power | 730 Wp | 725 Wp | | Efficiency | 23.50 % | 23.30 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | RS730S9-132GANT | TWMNF-66HD725 | Difference | | --- | --- | --- | --- | | Temperature coefficient | -0.310 %/°C | -0.280 %/°C | +0.030 %/°C for TWMNF-66HD725 | | Product warranty | 15 yrs | 12 yrs | +3 yrs for RS730S9-132GANT | | Module efficiency | 23.50 % | 23.30 % | +0.20 pp for RS730S9-132GANT | | Short-circuit current | 19.19 A | 18.60 A | 0.59 A apart | | Open-circuit voltage | 48.40 V | 49.45 V | 1.05 V apart | | Dimensions | 2384x1303x35 mm | 2384x1303x33 mm | 2384x1303x35 mm vs 2384x1303x33 mm | ## Every compared parameter | Parameter | RS730S9-132GANT | TWMNF-66HD725 | | --- | --- | --- | | Rated power | 730 Wp | 725 Wp | | Module efficiency | 23.50 % | 23.30 % | | Power density | 235.0 Wp/m² | 233.4 Wp/m² | | Open-circuit voltage | 48.40 V | 49.45 V | | Voltage at max power | 40.47 V | 41.20 V | | Short-circuit current | 19.19 A | 18.60 A | | Current at max power | 18.04 A | 17.60 A | | Temperature coefficient | -0.310 %/°C | -0.280 %/°C | | Dimensions | 2384x1303x35 mm | 2384x1303x33 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 38.0 kg | 37.9 kg | | Weight per kWp | 52.1 kg/kWp | 52.3 kg/kWp | | Product warranty | 15 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 | 132 | | Bifacial | Yes | Yes | ## Thirty-year yield Declared annual degradation, with a 1.0% first-year loss assumed for both panels because at least one datasheet omits it, at 1,200 kWh/kWp a year - **Cumulative output, RS730S9-132GANT:** 24,493 kWh - **Cumulative output, TWMNF-66HD725:** 24,325 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | RS730S9-132GANT | TWMNF-66HD725 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 730 W | 725 W | 100.0% of rated power | | Cool, bright day | 40 °C | 696 W | 695 W | 95.3% of rated power | | Typical summer roof | 55 °C | 662 W | 664 W | 90.7% of rated power | | Hot roof | 70 °C | 628 W | 634 W | 86.0% of rated power | ## Against the whole database | Measure | RS730S9-132GANT | TWMNF-66HD725 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #716 | #1,017 | 14,005 | RS730S9-132GANT leads by 301 places | | Power density | #800 | #936 | 14,005 | RS730S9-132GANT leads by 136 places | | Heat behaviour | #8,005 | #1,309 | 14,005 | TWMNF-66HD725 leads by 6,696 places | | Weight | #5,495 | #5,754 | 14,005 | RS730S9-132GANT leads by 259 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #199 | #424 | 14,005 | RS730S9-132GANT leads by 225 places | ## Questions ### Which panel is better: Huasun RS730S9-132GANT or Tongwei TWMNF-66HD725? According to our database: **Huasun RS730S9-132GANT** has higher module efficiency (**23.50%** vs **23.30%**); **Tongwei TWMNF-66HD725** tolerates heat better (temp coeff **-0.280%/°C** vs **-0.310%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Huasun RS730S9-132GANT and Tongwei TWMNF-66HD725? **Huasun RS730S9-132GANT** has a module efficiency of **23.50%**, while **Tongwei TWMNF-66HD725** is **23.30%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Huasun RS730S9-132GANT use vs Tongwei TWMNF-66HD725? **Huasun RS730S9-132GANT** uses **TOPCon** cells; **Tongwei TWMNF-66HD725** 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 Huasun RS730S9-132GANT and Tongwei TWMNF-66HD725? **Huasun RS730S9-132GANT** has a **30 years** power warranty; **Tongwei TWMNF-66HD725** 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 Huasun RS730S9-132GANT and Tongwei TWMNF-66HD725 bifacial panels? Both **Huasun RS730S9-132GANT** and **Tongwei TWMNF-66HD725** 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 - [Huasun RS730S9-132GANT vs Huasun RS725S9-132GANT](https://comparepv.com/compare/huasun-rs730s9-132gant/huasun-rs725s9-132gant) - The same specification on paper - [Huasun RS730S9-132GANT vs Huasun RS720S9-132GANT](https://comparepv.com/compare/huasun-rs730s9-132gant/huasun-rs720s9-132gant) - 3 differences, the largest is module efficiency - [Huasun RS730S9-132GANT vs Huasun RS715S89-132GANT](https://comparepv.com/compare/huasun-rs730s9-132gant/huasun-rs715s89-132gant) - 4 differences, the largest is module efficiency - [Huasun RS730S9-132GANT vs Huasun RS710S9-132GANT](https://comparepv.com/compare/huasun-rs730s9-132gant/huasun-rs710s9-132gant) - 3 differences, the largest is module efficiency - [Huasun RS730S9-132GANT vs Huasun RS705S9-132GANT](https://comparepv.com/compare/huasun-rs730s9-132gant/huasun-rs705s9-132gant) - 3 differences, the largest is module efficiency - [Tongwei TWMNF-66HD725 vs Tongwei TWMNF-66HD750](https://comparepv.com/compare/tongwei-solar-twmnf-66hd725/tongwei-solar-twmnf-66hd750) - 4 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/huasun-rs730s9-132gant/tongwei-solar-twmnf-66hd725 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.