--- title: "Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM620N-78HL4-BDV - Solar Panel Comparison | ComparePV" description: "Compare Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM620N-78HL4-BDV side by side: what actually differs, output when it is hot, thirty-year production, and the full specification." source: "https://comparepv.com/compare/jinko-solar-jkm615n-78hl4-bdv/jinko-solar-jkm620n-78hl4-bdv" updated: 2026-09-11 --- # Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM620N-78HL4-BDV 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 | [Jinko Solar JKM615N-78HL4-BDV](https://comparepv.com/panel/jinko-solar-jkm615n-78hl4-bdv) | [Jinko Solar JKM620N-78HL4-BDV](https://comparepv.com/panel/jinko-solar-jkm620n-78hl4-bdv) | | Manufacturer | Jinko Solar | Jinko Solar | | Power | 615 Wp | 620 Wp | | Efficiency | 22.00 % | 22.18 % | | Technology | N-type | N-type | ## Every compared parameter | Parameter | JKM615N-78HL4-BDV | JKM620N-78HL4-BDV | | --- | --- | --- | | Rated power | 615 Wp | 620 Wp | | Module efficiency | 22.00 % | 22.18 % | | Power density | 220.0 Wp/m² | 221.8 Wp/m² | | Open-circuit voltage | 55.44 V | 55.58 V | | Voltage at max power | 45.77 V | 45.93 V | | Short-circuit current | 14.11 A | 14.19 A | | Current at max power | 13.44 A | 13.50 A | | Temperature coefficient | -0.300 %/°C | -0.300 %/°C | | Dimensions | 2465x1134x30 mm | 2465x1134x30 mm | | Module area | 2.795 m² | 2.795 m² | | Weight | 34.6 kg | 34.6 kg | | Weight per kWp | 56.3 kg/kWp | 55.8 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | - | - | | Cell technology | N-type | N-type | | Cell type | Monocrystalline | Monocrystalline | | Cell count | 156 | 156 | | Bifacial | Yes | Yes | ## 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 (-0.300 %/°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, JKM615N-78HL4-BDV:** 20,634 kWh - **Cumulative output, JKM620N-78HL4-BDV:** 20,802 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | JKM615N-78HL4-BDV | JKM620N-78HL4-BDV | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 615 W | 620 W | 100.0% of rated power | | Cool, bright day | 40 °C | 587 W | 592 W | 95.5% of rated power | | Typical summer roof | 55 °C | 560 W | 564 W | 91.0% of rated power | | Hot roof | 70 °C | 532 W | 536 W | 86.5% of rated power | ## Against the whole database | Measure | JKM615N-78HL4-BDV | JKM620N-78HL4-BDV | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #6,517 | #5,930 | 14,005 | JKM620N-78HL4-BDV leads by 587 places | | Power density | #6,655 | #5,869 | 14,005 | JKM620N-78HL4-BDV leads by 786 places | | Heat behaviour | #6,093 | #6,093 | 14,005 | Tied - the same position in the database | | Weight | #10,534 | #10,192 | 14,005 | JKM620N-78HL4-BDV leads by 342 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #3,865 | #3,481 | 14,005 | JKM620N-78HL4-BDV leads by 384 places | ## Questions ### Which panel is better: Jinko Solar JKM615N-78HL4-BDV or Jinko Solar JKM620N-78HL4-BDV? According to our database: **Jinko Solar JKM620N-78HL4-BDV** has higher module efficiency (**22.18%** vs **22.00%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Jinko Solar JKM615N-78HL4-BDV and Jinko Solar JKM620N-78HL4-BDV? **Jinko Solar JKM615N-78HL4-BDV** has a module efficiency of **22.00%**, while **Jinko Solar JKM620N-78HL4-BDV** is **22.18%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Jinko Solar JKM615N-78HL4-BDV use vs Jinko Solar JKM620N-78HL4-BDV? **Jinko Solar JKM615N-78HL4-BDV** uses **N-type** cells; **Jinko Solar JKM620N-78HL4-BDV** uses **N-type**. 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 Jinko Solar JKM615N-78HL4-BDV and Jinko Solar JKM620N-78HL4-BDV? **Jinko Solar JKM615N-78HL4-BDV** has a **30 years** power warranty; **Jinko Solar JKM620N-78HL4-BDV** 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 Jinko Solar JKM615N-78HL4-BDV and Jinko Solar JKM620N-78HL4-BDV bifacial panels? Both **Jinko Solar JKM615N-78HL4-BDV** and **Jinko Solar JKM620N-78HL4-BDV** 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 - [Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM610N-78HL4-BDV](https://comparepv.com/compare/jinko-solar-jkm615n-78hl4-bdv/jinko-solar-jkm610n-78hl4-bdv) - The same specification on paper - [Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM605N-78HL4-BDV](https://comparepv.com/compare/jinko-solar-jkm615n-78hl4-bdv/jinko-solar-jkm605n-78hl4-bdv) - 3 differences, the largest is module efficiency - [Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM580N-72HL4-BDV](https://comparepv.com/compare/jinko-solar-jkm615n-78hl4-bdv/jinko-solar-jkm580n-72hl4-bdv) - 9 differences, the largest is rated power - [Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM575N-72HL4-BDV](https://comparepv.com/compare/jinko-solar-jkm615n-78hl4-bdv/jinko-solar-jkm575n-72hl4-bdv) - 8 differences, the largest is rated power - [Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM570N-72HL4-BDV](https://comparepv.com/compare/jinko-solar-jkm615n-78hl4-bdv/jinko-solar-jkm570n-72hl4-bdv) - 7 differences, the largest is rated power - [Jinko Solar JKM615N-78HL4-BDV vs Jinko Solar JKM565N-72HL4-BDV](https://comparepv.com/compare/jinko-solar-jkm615n-78hl4-bdv/jinko-solar-jkm565n-72hl4-bdv) - 7 differences, the largest is rated power --- Source: https://comparepv.com/compare/jinko-solar-jkm615n-78hl4-bdv/jinko-solar-jkm620n-78hl4-bdv 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.