--- title: "Sunplus 730 vs Sunplus 740 - Solar Panel Comparison | ComparePV" description: "Compare Sunplus 730 vs Sunplus 740 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/sunplus-730/sunplus-740" updated: 2026-09-11 --- # Sunplus 730 vs Sunplus 740 740 leads on the differences that matter The largest is module efficiency: 0.30 pp more efficient. 15 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 | [Sunplus 730](https://comparepv.com/panel/sunplus-730) | [Sunplus 740](https://comparepv.com/panel/sunplus-740) | | Manufacturer | Sunplus | Sunplus | | Power | 730 Wp | 740 Wp | | Efficiency | 23.50 % | 23.80 % | | Technology | HJT | HJT | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 730 | 740 | Difference | | --- | --- | --- | --- | | Module efficiency | 23.50 % | 23.80 % | +0.30 pp for 740 | | Power density | 235.0 Wp/m² | 238.2 Wp/m² | +3.2 Wp/m² for 740 | | Rated power | 730 Wp | 740 Wp | +10 W for 740 | ## Every compared parameter | Parameter | 730 | 740 | | --- | --- | --- | | Rated power | 730 Wp | 740 Wp | | Module efficiency | 23.50 % | 23.80 % | | Power density | 235.0 Wp/m² | 238.2 Wp/m² | | Open-circuit voltage | 50.99 V | 51.01 V | | Voltage at max power | 43.68 V | 43.78 V | | Short-circuit current | 17.66 A | 17.70 A | | Current at max power | 16.67 A | 16.78 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 2384x1303x35 mm | 2384x1303x35 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 39.0 kg | 39.0 kg | | Weight per kWp | 53.4 kg/kWp | 52.7 kg/kWp | | Product warranty | - | - | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.31 %/yr | 0.31 %/yr | | Cell technology | HJT | HJT | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | 156 | | Bifacial | Yes | Yes | ## Thirty-year yield Each panel's own declared degradation curve, at 1,200 kWh/kWp a year Same temp coeff. for both panels (-0.300 %/°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, 730:** 24,836 kWh - **Cumulative output, 740:** 25,176 kWh - **Gap:** 340 kWh ## Output when hot | Condition | Cell temperature | 730 | 740 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 730 W | 740 W | 100.0% of rated power | | Cool, bright day | 40 °C | 697 W | 707 W | 95.5% of rated power | | Typical summer roof | 55 °C | 664 W | 673 W | 91.0% of rated power | | Hot roof | 70 °C | 631 W | 640 W | 86.5% of rated power | ## Against the whole database | Measure | 730 | 740 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #716 | #433 | 14,005 | 740 leads by 283 places | | Power density | #800 | #431 | 14,005 | 740 leads by 369 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #7,348 | #6,344 | 14,005 | 740 leads by 1,004 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,335 | #1,031 | 14,005 | 740 leads by 304 places | ## Questions ### Which panel is better: Sunplus 730 or Sunplus 740? According to our database: **Sunplus 740** has higher module efficiency (**23.80%** vs **23.50%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Sunplus 730 and Sunplus 740? **Sunplus 730** has a module efficiency of **23.50%**, while **Sunplus 740** is **23.80%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Sunplus 730 use vs Sunplus 740? **Sunplus 730** uses **HJT** cells; **Sunplus 740** uses **HJT**. 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 Sunplus 730 and Sunplus 740? **Sunplus 730** has a **30 years** power warranty; **Sunplus 740** 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 Sunplus 730 and Sunplus 740 bifacial panels? Both **Sunplus 730** and **Sunplus 740** 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 - [Sunplus 730 vs Sunplus 750](https://comparepv.com/compare/sunplus-730/sunplus-750) - 3 differences, the largest is module efficiency - [Sunplus 730 vs Sunplus 745](https://comparepv.com/compare/sunplus-730/sunplus-745) - 3 differences, the largest is module efficiency - [Sunplus 730 vs Sunplus 735](https://comparepv.com/compare/sunplus-730/sunplus-735) - One difference: module efficiency - [Sunplus 730 vs Sunplus 725](https://comparepv.com/compare/sunplus-730/sunplus-725) - One difference: module efficiency - [Sunplus 730 vs Sunplus SR5-60HBD-600M](https://comparepv.com/compare/sunplus-730/sunplus-sr5-60hbd-600m) - 15 differences, the largest is module efficiency - [Sunplus 730 vs Sunplus SR5-60HBD-595M](https://comparepv.com/compare/sunplus-730/sunplus-sr5-60hbd-595m) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/sunplus-730/sunplus-740 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.