--- title: "DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-440 - Solar Panel Comparison | ComparePV" description: "Compare DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-440 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-425/dah-dhn-48z16-dg-bw-440" updated: 2026-09-11 --- # DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-440 440 leads on the differences that matter The largest is module efficiency: 0.75 pp more efficient. 16 of 19 comparable parameters are identical. ## The two panels | Attribute | A | B | | --- | --- | --- | | Panel | [DAH Solar DHN-48Z16/DG(BW)-425](https://comparepv.com/panel/dah-dhn-48z16-dg-bw-425) | [DAH Solar DHN-48Z16/DG(BW)-440](https://comparepv.com/panel/dah-dhn-48z16-dg-bw-440) | | Manufacturer | DAH Solar | DAH Solar | | Power | 425 Wp | 440 Wp | | Efficiency | 21.27 % | 22.02 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | 425 | 440 | Difference | | --- | --- | --- | --- | | Module efficiency | 21.27 % | 22.02 % | +0.75 pp for 440 | | Power density | 212.7 Wp/m² | 220.2 Wp/m² | +7.5 Wp/m² for 440 | | Rated power | 425 Wp | 440 Wp | +15 W for 440 | ## Every compared parameter | Parameter | 425 | 440 | | --- | --- | --- | | Rated power | 425 Wp | 440 Wp | | Module efficiency | 21.27 % | 22.02 % | | Power density | 212.7 Wp/m² | 220.2 Wp/m² | | Open-circuit voltage | 35.00 V | 35.60 V | | Voltage at max power | 29.60 V | 30.20 V | | Short-circuit current | 15.34 A | 15.52 A | | Current at max power | 14.36 A | 14.57 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 1762x1134x30 mm | 1762x1134x30 mm | | Module area | 1.998 m² | 1.998 m² | | Weight | 23.9 kg | 23.9 kg | | Weight per kWp | 56.2 kg/kWp | 54.3 kg/kWp | | Product warranty | 25 yrs | 25 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 | 96 | | 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, 425:** 14,260 kWh - **Cumulative output, 440:** 14,763 kWh - **Gap:** 503 kWh ## Output when hot | Condition | Cell temperature | 425 | 440 | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 425 W | 440 W | 100.0% of rated power | | Cool, bright day | 40 °C | 407 W | 421 W | 95.7% of rated power | | Typical summer roof | 55 °C | 388 W | 402 W | 91.3% of rated power | | Hot roof | 70 °C | 370 W | 383 W | 87.0% of rated power | ## Against the whole database | Measure | 425 | 440 | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #8,849 | #6,329 | 14,005 | 440 leads by 2,520 places | | Power density | #8,733 | #6,328 | 14,005 | 440 leads by 2,405 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #10,505 | #8,576 | 14,005 | 440 leads by 1,929 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #8,711 | #7,188 | 14,005 | 440 leads by 1,523 places | ## Questions ### Which panel is better: DAH Solar DHN-48Z16/DG(BW)-425 or DAH Solar DHN-48Z16/DG(BW)-440? According to our database: **DAH Solar DHN-48Z16/DG(BW)-440** has higher module efficiency (**22.02%** vs **21.27%**). 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)-425 and DAH Solar DHN-48Z16/DG(BW)-440? **DAH Solar DHN-48Z16/DG(BW)-425** has a module efficiency of **21.27%**, while **DAH Solar DHN-48Z16/DG(BW)-440** is **22.02%**. 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)-425 use vs DAH Solar DHN-48Z16/DG(BW)-440? **DAH Solar DHN-48Z16/DG(BW)-425** uses **TOPCon** cells; **DAH Solar DHN-48Z16/DG(BW)-440** 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)-425 and DAH Solar DHN-48Z16/DG(BW)-440? **DAH Solar DHN-48Z16/DG(BW)-425** has a **30 years** power warranty; **DAH Solar DHN-48Z16/DG(BW)-440** 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)-425 and DAH Solar DHN-48Z16/DG(BW)-440 bifacial panels? Both **DAH Solar DHN-48Z16/DG(BW)-425** and **DAH Solar DHN-48Z16/DG(BW)-440** 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)-425 vs DAH Solar DHN-48Z16/DG(BW)-455](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-425/dah-dhn-48z16-dg-bw-455) - 6 differences, the largest is module efficiency - [DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-450](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-425/dah-dhn-48z16-dg-bw-450) - 6 differences, the largest is module efficiency - [DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-445](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-425/dah-dhn-48z16-dg-bw-445) - 4 differences, the largest is module efficiency - [DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-435](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-425/dah-dhn-48z16-dg-bw-435) - 3 differences, the largest is module efficiency - [DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-48Z16/DG(BW)-430](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-425/dah-dhn-48z16-dg-bw-430) - One difference: module efficiency - [DAH Solar DHN-48Z16/DG(BW)-425 vs DAH Solar DHN-66Y18/DG-725](https://comparepv.com/compare/dah-dhn-48z16-dg-bw-425/dah-dhn-66y18-dg-725) - 13 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/dah-dhn-48z16-dg-bw-425/dah-dhn-48z16-dg-bw-440 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.