--- title: "Suntech STP445S-B72/Vnh vs Suntech STP720S-D66-Nsh+ - Solar Panel Comparison | ComparePV" description: "Compare Suntech STP445S-B72/Vnh vs Suntech STP720S-D66-Nsh+ side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/suntech-stp445s-b72-vnh/suntech-stp720s-d66-nsh" image: "https://comparepv.com/og/compare/panels/suntech-stp445s-b72-vnh/suntech-stp720s-d66-nsh.png" updated: 2026-09-11 --- # Suntech STP445S-B72/Vnh vs Suntech STP720S-D66-Nsh+ STP720S-D66-Nsh+ leads on the differences that matter The largest is module efficiency: 2.80 pp more efficient. 3 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 | [Suntech STP445S-B72/Vnh](https://comparepv.com/panel/suntech-stp445s-b72-vnh) | [Suntech STP720S-D66-Nsh+](https://comparepv.com/panel/suntech-stp720s-d66-nsh) | | Manufacturer | Suntech | Suntech | | Power | 445 Wp | 720 Wp | | Efficiency | 20.40 % | 23.20 % | | Technology | | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | STP445S-B72/Vnh | STP720S-D66-Nsh+ | Difference | | --- | --- | --- | --- | | Module efficiency | 20.40 % | 23.20 % | +2.80 pp for STP720S-D66-Nsh+ | | Temperature coefficient | -0.360 %/°C | -0.280 %/°C | +0.080 %/°C for STP720S-D66-Nsh+ | | Rated power | 445 Wp | 720 Wp | +275 W for STP720S-D66-Nsh+ | | Power density | 204.4 Wp/m² | 231.8 Wp/m² | +27.3 Wp/m² for STP720S-D66-Nsh+ | | Performance warranty | 25 yrs | 30 yrs | +5 yrs for STP720S-D66-Nsh+ | | Annual degradation | 0.55 %/yr | 0.40 %/yr | -0.15 %/yr for STP720S-D66-Nsh+ | | Weight | 24.5 kg | 37.5 kg | -13.0 kg for STP445S-B72/Vnh | | Product warranty | 12 yrs | 15 yrs | +3 yrs for STP720S-D66-Nsh+ | | Short-circuit current | 11.54 A | 18.46 A | 6.92 A apart | | Module area | 2.177 m² | 3.106 m² | 0.930 m² apart | | Weight per kWp | 55.1 kg/kWp | 52.1 kg/kWp | -3.0 kg/kWp for STP720S-D66-Nsh+ | | Current at max power | 10.81 A | 17.62 A | 6.81 A apart | | Cell count | 144 | 132 | 12 cells apart | | Bifacial | No | Yes | No vs Yes | | Dimensions | 2095x1039x35 mm | 2384x1303x33 mm | 2095x1039x35 mm vs 2384x1303x33 mm | ## Every compared parameter | Parameter | STP445S-B72/Vnh | STP720S-D66-Nsh+ | | --- | --- | --- | | Rated power | 445 Wp | 720 Wp | | Module efficiency | 20.40 % | 23.20 % | | Power density | 204.4 Wp/m² | 231.8 Wp/m² | | Open-circuit voltage | 49.00 V | 49.26 V | | Voltage at max power | 41.20 V | 40.87 V | | Short-circuit current | 11.54 A | 18.46 A | | Current at max power | 10.81 A | 17.62 A | | Temperature coefficient | -0.360 %/°C | -0.280 %/°C | | Dimensions | 2095x1039x35 mm | 2384x1303x33 mm | | Module area | 2.177 m² | 3.106 m² | | Weight | 24.5 kg | 37.5 kg | | Weight per kWp | 55.1 kg/kWp | 52.1 kg/kWp | | Product warranty | 12 yrs | 15 yrs | | Performance warranty | 25 yrs | 30 yrs | | Annual degradation | 0.55 %/yr | 0.40 %/yr | | Cell technology | - | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 144 | 132 | | Bifacial | No | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year - **Cumulative output, STP445S-B72/Vnh:** 14,422 kWh - **Cumulative output, STP720S-D66-Nsh+:** 24,157 kWh - **Gap:** 9,735 kWh ## Output when hot | Condition | Cell temperature | STP445S-B72/Vnh | STP720S-D66-Nsh+ | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 445 W | 720 W | 100.0% of rated power | | Cool, bright day | 40 °C | 421 W | 690 W | 94.6% of rated power | | Typical summer roof | 55 °C | 397 W | 660 W | 89.2% of rated power | | Hot roof | 70 °C | 373 W | 629 W | 83.8% of rated power | ## Against the whole database | Measure | STP445S-B72/Vnh | STP720S-D66-Nsh+ | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #11,680 | #1,349 | 14,129 | STP720S-D66-Nsh+ leads by 10,331 places | | Power density | #11,609 | #1,390 | 14,129 | STP720S-D66-Nsh+ leads by 10,219 places | | Heat behaviour | #12,425 | #1,347 | 14,129 | STP720S-D66-Nsh+ leads by 11,078 places | | Weight | #9,519 | #5,553 | 14,129 | STP720S-D66-Nsh+ leads by 3,966 places | | Warranty | #9,912 | #21 | 14,129 | STP720S-D66-Nsh+ leads by 9,891 places | | Overall | #11,533 | #334 | 14,129 | STP720S-D66-Nsh+ leads by 11,199 places | ## Questions ### Which panel is better: Suntech STP445S-B72/Vnh or Suntech STP720S-D66-Nsh+? According to our database: **Suntech STP720S-D66-Nsh+** has higher module efficiency (**23.20%** vs **20.40%**); **Suntech STP720S-D66-Nsh+** tolerates heat better (temp coeff **-0.280%/°C** vs **-0.360%/°C**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Suntech STP445S-B72/Vnh and Suntech STP720S-D66-Nsh+? **Suntech STP445S-B72/Vnh** has a module efficiency of **20.40%**, while **Suntech STP720S-D66-Nsh+** is **23.20%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Suntech STP445S-B72/Vnh use vs Suntech STP720S-D66-Nsh+? **Suntech STP445S-B72/Vnh** uses Monocrystalline cells; **Suntech STP720S-D66-Nsh+** 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 Suntech STP445S-B72/Vnh and Suntech STP720S-D66-Nsh+? **Suntech STP445S-B72/Vnh** has a **25 years** power warranty; **Suntech STP720S-D66-Nsh+** 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 Suntech STP445S-B72/Vnh and Suntech STP720S-D66-Nsh+ bifacial panels? **Suntech STP720S-D66-Nsh+** is bifacial (captures light from both faces); **Suntech STP445S-B72/Vnh** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [Suntech STP445S-B72/Vnh vs Suntech STP735S-D66-Nsh+](https://comparepv.com/compare/suntech-stp445s-b72-vnh/suntech-stp735s-d66-nsh) - 15 differences, the largest is module efficiency - [Suntech STP445S-B72/Vnh vs Suntech STP730S-D66-Nsh+](https://comparepv.com/compare/suntech-stp445s-b72-vnh/suntech-stp730s-d66-nsh) - 15 differences, the largest is module efficiency - [Suntech STP445S-B72/Vnh vs Suntech STP725S-D66-Nsh+](https://comparepv.com/compare/suntech-stp445s-b72-vnh/suntech-stp725s-d66-nsh) - 15 differences, the largest is module efficiency - [Suntech STP445S-B72/Vnh vs Suntech STP715S-D66-Nsh+](https://comparepv.com/compare/suntech-stp445s-b72-vnh/suntech-stp715s-d66-nsh) - 15 differences, the largest is module efficiency - [Suntech STP445S-B72/Vnh vs Suntech STP710S-D66-Nsh+](https://comparepv.com/compare/suntech-stp445s-b72-vnh/suntech-stp710s-d66-nsh) - 13 differences, the largest is module efficiency - [Suntech STP445S-B72/Vnh vs Suntech STP705S-D66-Nsh+](https://comparepv.com/compare/suntech-stp445s-b72-vnh/suntech-stp705s-d66-nsh) - 13 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/suntech-stp445s-b72-vnh/suntech-stp720s-d66-nsh 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.