--- title: "DAH Solar DHN-78X16/DG-640W vs Jinko Solar JKM610-635N-66HL4M-(V) (620W bin) - Solar Panel Comparison | ComparePV" description: "Compare DAH Solar DHN-78X16/DG-640W vs Jinko Solar JKM610-635N-66HL4M-(V) (620W bin) 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-78x16-dg-640w/jinko-solar-co-ltd-jkm610-635n-66hl4m-v-620w-bin" updated: 2026-09-11 --- # DAH Solar DHN-78X16/DG-640W vs Jinko Solar JKM610-635N-66HL4M-(V) (620W bin) 12 differences, and they point both ways The largest is weight: 6.0 kg lighter. 6 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 | [DAH Solar DHN-78X16/DG-640W](https://comparepv.com/panel/dah-dhn-78x16-dg-640w) | [Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)](https://comparepv.com/panel/jinko-solar-co-ltd-jkm610-635n-66hl4m-v-620w-bin) | | Manufacturer | DAH Solar | Jinko Solar | | Power | 640 Wp | 620 Wp | | Efficiency | 22.90 % | 22.95 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | DHN-78X16/DG-640W | JKM610-635N-66HL4M-(V) (620W bin) | Difference | | --- | --- | --- | --- | | Weight | 34.2 kg | 28.2 kg | -6.0 kg for JKM610-635N-66HL4M-(V) (620W bin) | | Weight per kWp | 53.4 kg/kWp | 45.5 kg/kWp | -8.0 kg/kWp for JKM610-635N-66HL4M-(V) (620W bin) | | Product warranty | 15 yrs | 12 yrs | +3 yrs for DHN-78X16/DG-640W | | Rated power | 640 Wp | 620 Wp | +20 W for DHN-78X16/DG-640W | | Open-circuit voltage | 56.40 V | 48.95 V | 7.45 V apart | | Module area | 2.795 m² | 2.701 m² | 0.094 m² apart | | Short-circuit current | 14.32 A | 16.15 A | 1.83 A apart | | Voltage at max power | 47.60 V | 40.90 V | 6.70 V apart | | Cell count | 156 | 132 | 24 cells apart | | Current at max power | 13.45 A | 15.16 A | 1.71 A apart | | Bifacial | Yes | No | Yes vs No | | Dimensions | 2465x1134x34 mm | 2382x1134x35 mm | 2465x1134x34 mm vs 2382x1134x35 mm | ## Every compared parameter | Parameter | DHN-78X16/DG-640W | JKM610-635N-66HL4M-(V) (620W bin) | | --- | --- | --- | | Rated power | 640 Wp | 620 Wp | | Module efficiency | 22.90 % | 22.95 % | | Power density | 229.0 Wp/m² | 229.5 Wp/m² | | Open-circuit voltage | 56.40 V | 48.95 V | | Voltage at max power | 47.60 V | 40.90 V | | Short-circuit current | 14.32 A | 16.15 A | | Current at max power | 13.45 A | 15.16 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2465x1134x34 mm | 2382x1134x35 mm | | Module area | 2.795 m² | 2.701 m² | | Weight | 34.2 kg | 28.2 kg | | Weight per kWp | 53.4 kg/kWp | 45.5 kg/kWp | | Product warranty | 15 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | 0.40 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | 132 | | Bifacial | Yes | No | ## Thirty-year yield A 1.0% first-year loss then 0.40% a year, assumed for both panels, 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, DHN-78X16/DG-640W:** 21,473 kWh - **Cumulative output, JKM610-635N-66HL4M-(V) (620W bin):** 20,802 kWh - **Gap:** 671 kWh ## Output when hot | Condition | Cell temperature | DHN-78X16/DG-640W | JKM610-635N-66HL4M-(V) (620W bin) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 640 W | 620 W | 100.0% of rated power | | Cool, bright day | 40 °C | 612 W | 593 W | 95.7% of rated power | | Typical summer roof | 55 °C | 584 W | 566 W | 91.3% of rated power | | Hot roof | 70 °C | 556 W | 539 W | 87.0% of rated power | ## Against the whole database | Measure | DHN-78X16/DG-640W | JKM610-635N-66HL4M-(V) (620W bin) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,359 | #2,268 | 14,005 | JKM610-635N-66HL4M-(V) (620W bin) leads by 91 places | | Power density | #2,389 | #2,191 | 14,005 | JKM610-635N-66HL4M-(V) (620W bin) leads by 198 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #7,363 | #749 | 14,005 | JKM610-635N-66HL4M-(V) (620W bin) leads by 6,614 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,704 | #2,491 | 14,005 | DHN-78X16/DG-640W leads by 787 places | ## Questions ### Which panel is better: DAH Solar DHN-78X16/DG-640W or Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)? According to our database: **Jinko Solar JKM610-635N-66HL4M-(V) (**620 W** bin)** has higher module efficiency (**22.95%** vs **22.90%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of DAH Solar DHN-78X16/DG-640W and Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)? **DAH Solar DHN-78X16/DG-**640 W**** has a module efficiency of **22.90%**, while **Jinko Solar JKM610-635N-66HL4M-(V) (**620 W** bin)** is **22.95%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does DAH Solar DHN-78X16/DG-640W use vs Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)? **DAH Solar DHN-78X16/DG-**640 W**** uses **TOPCon** cells; **Jinko Solar JKM610-635N-66HL4M-(V) (**620 W** bin)** 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-78X16/DG-640W and Jinko Solar JKM610-635N-66HL4M-(V) (620W bin)? **DAH Solar DHN-78X16/DG-**640 W**** has a **30 years** power warranty; **Jinko Solar JKM610-635N-66HL4M-(V) (**620 W** bin)** 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-78X16/DG-640W and Jinko Solar JKM610-635N-66HL4M-(V) (620W bin) bifacial panels? **DAH Solar DHN-78X16/DG-**640 W**** is bifacial (captures light from both faces); **Jinko Solar JKM610-635N-66HL4M-(V) (**620 W** bin)** is monofacial. Bifacial panels work best on ground mounts or raised structures with a light-coloured surface underneath. ## Related comparisons - [DAH Solar DHN-78X16/DG-640W vs DAH Solar DHN-78X16/DG-635W](https://comparepv.com/compare/dah-dhn-78x16-dg-640w/dah-dhn-78x16-dg-635w) - The same specification on paper - [DAH Solar DHN-78X16/DG-640W vs DAH Solar DHN-78X16/DG-630W](https://comparepv.com/compare/dah-dhn-78x16-dg-640w/dah-dhn-78x16-dg-630w) - 3 differences, the largest is module efficiency - [DAH Solar DHN-78X16/DG-640W vs DAH Solar DHN-78X16/DG-625W](https://comparepv.com/compare/dah-dhn-78x16-dg-640w/dah-dhn-78x16-dg-625w) - 3 differences, the largest is module efficiency - [DAH Solar DHN-78X16/DG-640W vs DAH Solar DHN-78X16/DG-620W](https://comparepv.com/compare/dah-dhn-78x16-dg-640w/dah-dhn-78x16-dg-620w) - 3 differences, the largest is module efficiency - [Jinko Solar JKM610-635N-66HL4M-(V) (620W bin) vs Jinko Solar JKM610-635N-66HL4M-(V) (635W bin)](https://comparepv.com/compare/jinko-solar-co-ltd-jkm610-635n-66hl4m-v-620w-bin/jinko-solar-co-ltd-jkm610-635n-66hl4m-v-635w-bin) - 3 differences, the largest is module efficiency - [Jinko Solar JKM610-635N-66HL4M-(V) (620W bin) vs Jinko Solar JKM610-635N-66HL4M-(V) (630W bin)](https://comparepv.com/compare/jinko-solar-co-ltd-jkm610-635n-66hl4m-v-620w-bin/jinko-solar-co-ltd-jkm610-635n-66hl4m-v-630w-bin) - 3 differences, the largest is module efficiency --- Source: https://comparepv.com/compare/dah-dhn-78x16-dg-640w/jinko-solar-co-ltd-jkm610-635n-66hl4m-v-620w-bin 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.