--- title: "DAH Solar DHN-48Z16/DG(BW)-455 vs DAH Solar DHN-66Y18/DG-725 - Solar Panel Comparison | ComparePV" description: "Compare DAH Solar DHN-48Z16/DG(BW)-455 vs DAH Solar DHN-66Y18/DG-725 side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/dah-dhn-48z16-dg-bw-455/dah-dhn-66y18-dg-725" updated: 2026-09-11 --- # DAH Solar DHN-48Z16/DG(BW)-455 vs DAH Solar DHN-66Y18/DG-725 66Y18/DG-725 leads on the differences that matter The largest is rated power: 270 W more power. 7 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [DAH Solar DHN-48Z16/DG(BW)-455](https://comparepv.com/panel/dah-dhn-48z16-dg-bw-455) | [DAH Solar DHN-66Y18/DG-725](https://comparepv.com/panel/dah-dhn-66y18-dg-725) | | Manufacturer | DAH Solar | DAH Solar | | Power | 455 Wp | 725 Wp | | Efficiency | 22.77 % | 23.34 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 48Z16/DG(BW)-455 | 66Y18/DG-725 | Difference | | --- | --- | --- | --- | | Rated power | 455 Wp | 725 Wp | +270 W for 66Y18/DG-725 | | Module efficiency | 22.77 % | 23.34 % | +0.57 pp for 66Y18/DG-725 | | Weight | 23.9 kg | 36.7 kg | -12.8 kg for 48Z16/DG(BW)-455 | | Product warranty | 25 yrs | 15 yrs | +10 yrs for 48Z16/DG(BW)-455 | | Open-circuit voltage | 36.20 V | 48.60 V | 12.40 V apart | | Short-circuit current | 15.70 A | 18.79 A | 3.09 A apart | | Module area | 1.998 m² | 3.106 m² | 1.108 m² apart | | Power density | 227.7 Wp/m² | 233.4 Wp/m² | +5.7 Wp/m² for 66Y18/DG-725 | | Voltage at max power | 30.80 V | 41.00 V | 10.20 V apart | | Current at max power | 14.77 A | 17.68 A | 2.91 A apart | | Cell count | 96 | 132 | 36 cells apart | | Dimensions | 1762x1134x30 mm | 2384x1303x33 mm | 1762x1134x30 mm vs 2384x1303x33 mm | ## Every compared parameter | Parameter | 48Z16/DG(BW)-455 | 66Y18/DG-725 | | --- | --- | --- | | Rated power | 455 Wp | 725 Wp | | Module efficiency | 22.77 % | 23.34 % | | Power density | 227.7 Wp/m² | 233.4 Wp/m² | | Open-circuit voltage | 36.20 V | 48.60 V | | Voltage at max power | 30.80 V | 41.00 V | | Short-circuit current | 15.70 A | 18.79 A | | Current at max power | 14.77 A | 17.68 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1762x1134x30 mm | 2384x1303x33 mm | | Module area | 1.998 m² | 3.106 m² | | Weight | 23.9 kg | 36.7 kg | | Weight per kWp | 52.5 kg/kWp | 50.6 kg/kWp | | Product warranty | 25 yrs | 15 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 | 96 | 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 (-0.290 %/°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, 48Z16/DG(BW)-455:** 15,266 kWh - **Cumulative output, 66Y18/DG-725:** 24,325 kWh - **Gap:** 9,059 kWh ## Output when hot | Condition | Cell temperature | 48Z16/DG(BW)-455 | 66Y18/DG-725 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 455 W | 725 W | 100.0% of rated power | | Cool, bright day | 40 °C | 435 W | 693 W | 95.7% of rated power | | Typical summer roof | 55 °C | 415 W | 662 W | 91.3% of rated power | | Hot roof | 70 °C | 396 W | 630 W | 87.0% of rated power | ## Against the whole database | Measure | 48Z16/DG(BW)-455 | 66Y18/DG-725 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #3,073 | #943 | 14,005 | 66Y18/DG-725 leads by 2,130 places | | Power density | #2,888 | #936 | 14,005 | 66Y18/DG-725 leads by 1,952 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #6,129 | #4,067 | 14,005 | 66Y18/DG-725 leads by 2,062 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #5,689 | #251 | 14,005 | 66Y18/DG-725 leads by 5,438 places | ## Questions ### Which panel is better: DAH Solar DHN-48Z16/DG(BW)-455 or DAH Solar DHN-66Y18/DG-725? According to our database: **DAH Solar DHN-66Y18/DG-725** has higher module efficiency (**23.34%** vs **22.77%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of DAH Solar DHN-48Z16/DG(BW)-455 and DAH Solar DHN-66Y18/DG-725? **DAH Solar DHN-48Z16/DG(BW)-455** has a module efficiency of **22.77%**, while **DAH Solar DHN-66Y18/DG-725** is **23.34%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does DAH Solar DHN-48Z16/DG(BW)-455 use vs DAH Solar DHN-66Y18/DG-725? **DAH Solar DHN-48Z16/DG(BW)-455** uses **TOPCon** cells; **DAH Solar DHN-66Y18/DG-725** 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 DAH Solar DHN-48Z16/DG(BW)-455 and DAH Solar DHN-66Y18/DG-725? **DAH Solar DHN-48Z16/DG(BW)-455** has a **30 years** power warranty; **DAH Solar DHN-66Y18/DG-725** 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 DAH Solar DHN-48Z16/DG(BW)-455 and DAH Solar DHN-66Y18/DG-725 bifacial panels? Both **DAH Solar DHN-48Z16/DG(BW)-455** and **DAH Solar DHN-66Y18/DG-725** 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 - [DAH Solar DHN-48Z16/DG(BW)-455 vs DAH Solar DHN-48Z16/DG(BW)-450](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-455/dah-dhn-48z16-dg-bw-450) - One difference: module efficiency - [DAH Solar DHN-48Z16/DG(BW)-455 vs DAH Solar DHN-48Z16/DG(BW)-445](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-455/dah-dhn-48z16-dg-bw-445) - 3 differences, the largest is module efficiency - [DAH Solar DHN-48Z16/DG(BW)-455 vs DAH Solar DHN-48Z16/DG(BW)-440](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-455/dah-dhn-48z16-dg-bw-440) - 3 differences, the largest is module efficiency - [DAH Solar DHN-48Z16/DG(BW)-455 vs DAH Solar DHN-48Z16/DG(BW)-435](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-455/dah-dhn-48z16-dg-bw-435) - 4 differences, the largest is module efficiency - [DAH Solar DHN-48Z16/DG(BW)-455 vs DAH Solar DHN-48Z16/DG(BW)-430](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-455/dah-dhn-48z16-dg-bw-430) - 6 differences, the largest is module efficiency - [DAH Solar DHN-48Z16/DG(BW)-455 vs DAH Solar DHN-48Z16/DG(BW)-425](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-455/dah-dhn-48z16-dg-bw-425) - 6 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/dah-dhn-48z16-dg-bw-455/dah-dhn-66y18-dg-725 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.