--- title: "Sunplus 735 vs Sunplus 740 - Solar Panel Comparison | ComparePV" description: "Compare Sunplus 735 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-735/sunplus-740" updated: 2026-09-11 --- # Sunplus 735 vs Sunplus 740 Identical on every published parameter All 18 comparable parameters agree, with 1 more left out because at least one datasheet does not publish it. Two records this alike are usually one panel sold under two names, or two bins of the same production line - decide on price and on who you would rather buy from. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [Sunplus 735](https://comparepv.com/panel/sunplus-735) | [Sunplus 740](https://comparepv.com/panel/sunplus-740) | | Manufacturer | Sunplus | Sunplus | | Power | 735 Wp | 740 Wp | | Efficiency | 23.70 % | 23.80 % | | Technology | HJT | HJT | ## Every compared parameter | Parameter | 735 | 740 | | --- | --- | --- | | Rated power | 735 Wp | 740 Wp | | Module efficiency | 23.70 % | 23.80 % | | Power density | 236.6 Wp/m² | 238.2 Wp/m² | | Open-circuit voltage | 51.01 V | 51.01 V | | Voltage at max power | 43.71 V | 43.78 V | | Short-circuit current | 17.68 A | 17.70 A | | Current at max power | 16.72 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 | 53.1 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, 735:** 25,006 kWh - **Cumulative output, 740:** 25,176 kWh - **Gap:** 170 kWh ## Output when hot | Condition | Cell temperature | 735 | 740 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 735 W | 740 W | 100.0% of rated power | | Cool, bright day | 40 °C | 702 W | 707 W | 95.5% of rated power | | Typical summer roof | 55 °C | 669 W | 673 W | 91.0% of rated power | | Hot roof | 70 °C | 636 W | 640 W | 86.5% of rated power | ## Against the whole database | Measure | 735 | 740 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #517 | #433 | 14,005 | 740 leads by 84 places | | Power density | #582 | #431 | 14,005 | 740 leads by 151 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #6,818 | #6,344 | 14,005 | 740 leads by 474 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,146 | #1,031 | 14,005 | 740 leads by 115 places | ## Questions ### Which panel is better: Sunplus 735 or Sunplus 740? According to our database: **Sunplus 740** has higher module efficiency (**23.80%** vs **23.70%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Sunplus 735 and Sunplus 740? **Sunplus 735** has a module efficiency of **23.70%**, 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 735 use vs Sunplus 740? **Sunplus 735** 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 735 and Sunplus 740? **Sunplus 735** 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 735 and Sunplus 740 bifacial panels? Both **Sunplus 735** 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 735 vs Sunplus 750](https://comparepv.com/compare/sunplus-735/sunplus-750) - 3 differences, the largest is module efficiency - [Sunplus 735 vs Sunplus 745](https://comparepv.com/compare/sunplus-735/sunplus-745) - 3 differences, the largest is module efficiency - [Sunplus 735 vs Sunplus 730](https://comparepv.com/compare/sunplus-735/sunplus-730) - One difference: module efficiency - [Sunplus 735 vs Sunplus 725](https://comparepv.com/compare/sunplus-735/sunplus-725) - 3 differences, the largest is module efficiency - [Sunplus 735 vs Sunplus SR5-60HBD-600M](https://comparepv.com/compare/sunplus-735/sunplus-sr5-60hbd-600m) - 14 differences, the largest is module efficiency - [Sunplus 735 vs Sunplus SR5-60HBD-595M](https://comparepv.com/compare/sunplus-735/sunplus-sr5-60hbd-595m) - 14 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/sunplus-735/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.