--- title: "SunEvo Solar SE6-66HBD-725 vs SunEvo Solar SE6-66HBD-740W - Solar Panel Comparison | ComparePV" description: "Compare SunEvo Solar SE6-66HBD-725 vs SunEvo Solar SE6-66HBD-740W side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/sunevo-solar-se6-66hbd-725/sunevo-solar-se6-66hbd-740w" updated: 2026-09-11 --- # SunEvo Solar SE6-66HBD-725 vs SunEvo Solar SE6-66HBD-740W 740W leads on the differences that matter The largest is module efficiency: 0.46 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [SunEvo Solar SE6-66HBD-725](https://comparepv.com/panel/sunevo-solar-se6-66hbd-725) | [SunEvo Solar SE6-66HBD-740W](https://comparepv.com/panel/sunevo-solar-se6-66hbd-740w) | | Manufacturer | SunEvo Solar | SunEvo Solar | | Power | 725 Wp | 740 Wp | | Efficiency | 23.34 % | 23.80 % | | Technology | HJT | HJT | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 725 | 740W | Difference | | --- | --- | --- | --- | | Module efficiency | 23.34 % | 23.80 % | +0.46 pp for 740W | | Power density | 233.4 Wp/m² | 238.2 Wp/m² | +4.8 Wp/m² for 740W | | Rated power | 725 Wp | 740 Wp | +15 W for 740W | ## Every compared parameter | Parameter | 725 | 740W | | --- | --- | --- | | Rated power | 725 Wp | 740 Wp | | Module efficiency | 23.34 % | 23.80 % | | Power density | 233.4 Wp/m² | 238.2 Wp/m² | | Open-circuit voltage | 50.27 V | 50.57 V | | Voltage at max power | 42.23 V | 42.50 V | | Short-circuit current | 18.26 A | 18.53 A | | Current at max power | 17.18 A | 17.42 A | | Temperature coefficient | -0.240 %/°C | -0.240 %/°C | | Dimensions | 2384x1303x33 mm | 2384x1303x33 mm | | Module area | 3.106 m² | 3.106 m² | | Weight | 37.9 kg | 37.9 kg | | Weight per kWp | 52.3 kg/kWp | 51.2 kg/kWp | | Product warranty | 15 yrs | 15 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.30 %/yr | 0.30 %/yr | | Cell technology | HJT | HJT | | 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 Same temp coeff. for both panels (-0.240 %/°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, 725:** 24,704 kWh - **Cumulative output, 740W:** 25,215 kWh - **Gap:** 511 kWh ## Output when hot | Condition | Cell temperature | 725 | 740W | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 725 W | 740 W | 100.0% of rated power | | Cool, bright day | 40 °C | 699 W | 713 W | 96.4% of rated power | | Typical summer roof | 55 °C | 673 W | 687 W | 92.8% of rated power | | Hot roof | 70 °C | 647 W | 660 W | 89.2% of rated power | ## Against the whole database | Measure | 725 | 740W | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #943 | #433 | 14,005 | 740W leads by 510 places | | Power density | #936 | #431 | 14,005 | 740W leads by 505 places | | Heat behaviour | #13 | #13 | 14,005 | Tied - the same position in the database | | Weight | #5,754 | #4,594 | 14,005 | 740W leads by 1,160 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #254 | #135 | 14,005 | 740W leads by 119 places | ## Questions ### Which panel is better: SunEvo Solar SE6-66HBD-725 or SunEvo Solar SE6-66HBD-740W? According to our database: **SunEvo Solar SE6-66HBD-**740 W**** has higher module efficiency (**23.80%** vs **23.34%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of SunEvo Solar SE6-66HBD-725 and SunEvo Solar SE6-66HBD-740W? **SunEvo Solar SE6-66HBD-725** has a module efficiency of **23.34%**, while **SunEvo Solar SE6-66HBD-**740 W**** is **23.80%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does SunEvo Solar SE6-66HBD-725 use vs SunEvo Solar SE6-66HBD-740W? **SunEvo Solar SE6-66HBD-725** uses **HJT** cells; **SunEvo Solar SE6-66HBD-**740 W**** 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 SunEvo Solar SE6-66HBD-725 and SunEvo Solar SE6-66HBD-740W? **SunEvo Solar SE6-66HBD-725** has a **30 years** power warranty; **SunEvo Solar SE6-66HBD-**740 W**** 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 SunEvo Solar SE6-66HBD-725 and SunEvo Solar SE6-66HBD-740W bifacial panels? Both **SunEvo Solar SE6-66HBD-725** and **SunEvo Solar SE6-66HBD-**740 W**** 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 - [SunEvo Solar SE6-66HBD-725 vs SunEvo Solar SE6-66HBD-750W](https://comparepv.com/compare/sunevo-solar-se6-66hbd-725/sunevo-solar-se6-66hbd-750w) - 3 differences, the largest is module efficiency - [SunEvo Solar SE6-66HBD-725 vs SunEvo Solar SE6-66HBD-745W](https://comparepv.com/compare/sunevo-solar-se6-66hbd-725/sunevo-solar-se6-66hbd-745w) - 3 differences, the largest is module efficiency - [SunEvo Solar SE6-66HBD-725 vs SunEvo Solar SE6-66HBD-735W](https://comparepv.com/compare/sunevo-solar-se6-66hbd-725/sunevo-solar-se6-66hbd-735w) - 3 differences, the largest is module efficiency - [SunEvo Solar SE6-66HBD-725 vs SunEvo Solar SE6-66HBD-735](https://comparepv.com/compare/sunevo-solar-se6-66hbd-725/sunevo-solar-se6-66hbd-735) - 3 differences, the largest is module efficiency - [SunEvo Solar SE6-66HBD-725 vs SunEvo Solar SE6-66HBD-730](https://comparepv.com/compare/sunevo-solar-se6-66hbd-725/sunevo-solar-se6-66hbd-730) - The same specification on paper - [SunEvo Solar SE6-66HBD-725 vs SunEvo Solar SE6-66HBD-730W](https://comparepv.com/compare/sunevo-solar-se6-66hbd-725/sunevo-solar-se6-66hbd-730w) - The same specification on paper --- Source: https://comparepv.com/compare/sunevo-solar-se6-66hbd-725/sunevo-solar-se6-66hbd-740w 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.