--- title: "Jinko Solar JKM625-650N-78HL4-BDV vs Jinko Solar JKM625-650N-78HL4-BDV (640W) - Solar Panel Comparison | ComparePV" description: "Compare Jinko Solar JKM625-650N-78HL4-BDV vs Jinko Solar JKM625-650N-78HL4-BDV (640W) 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-co-ltd-jkm625-650n-78hl4-bdv/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w" updated: 2026-09-11 --- # Jinko Solar JKM625-650N-78HL4-BDV vs Jinko Solar JKM625-650N-78HL4-BDV (640W) BDV leads on the differences that matter The largest is module efficiency: 0.35 pp more efficient. 15 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 | [Jinko Solar JKM625-650N-78HL4-BDV](https://comparepv.com/panel/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv) | [Jinko Solar JKM625-650N-78HL4-BDV (640W)](https://comparepv.com/panel/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w) | | Manufacturer | Jinko Solar | Jinko Solar | | Power | 650 Wp | 640 Wp | | Efficiency | 23.25 % | 22.90 % | | Technology | TOPCon | TOPCon | ## Where they differ Ranked by how much the difference matters, not by datasheet order. | Parameter | BDV | BDV (640W) | Difference | | --- | --- | --- | --- | | Module efficiency | 23.25 % | 22.90 % | +0.35 pp for BDV | | Power density | 232.5 Wp/m² | 229.0 Wp/m² | +3.6 Wp/m² for BDV | | Rated power | 650 Wp | 640 Wp | +10 W for BDV | ## Every compared parameter | Parameter | BDV | BDV (640W) | | --- | --- | --- | | Rated power | 650 Wp | 640 Wp | | Module efficiency | 23.25 % | 22.90 % | | Power density | 232.5 Wp/m² | 229.0 Wp/m² | | Open-circuit voltage | 57.60 V | 57.34 V | | Voltage at max power | 48.33 V | 48.02 V | | Short-circuit current | 14.10 A | 13.98 A | | Current at max power | 13.45 A | 13.33 A | | Temperature coefficient | -0.290 %/°C | -0.290 %/°C | | Dimensions | 2465x1134x30 mm | 2465x1134x30 mm | | Module area | 2.795 m² | 2.795 m² | | Weight | 34.0 kg | 34.0 kg | | Weight per kWp | 52.3 kg/kWp | 53.1 kg/kWp | | Product warranty | 12 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 | 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 (-0.290 %/°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, BDV:** 21,809 kWh - **Cumulative output, BDV (640W):** 21,473 kWh - **Gap:** 336 kWh ## Output when hot | Condition | Cell temperature | BDV | BDV (640W) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 650 W | 640 W | 100.0% of rated power | | Cool, bright day | 40 °C | 622 W | 612 W | 95.7% of rated power | | Typical summer roof | 55 °C | 593 W | 584 W | 91.3% of rated power | | Hot roof | 70 °C | 565 W | 556 W | 87.0% of rated power | ## Against the whole database | Measure | BDV | BDV (640W) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #1,239 | #2,359 | 14,005 | BDV leads by 1,120 places | | Power density | #1,222 | #2,389 | 14,005 | BDV leads by 1,167 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #5,769 | #6,913 | 14,005 | BDV leads by 1,144 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #1,648 | #2,068 | 14,005 | BDV leads by 420 places | ## Questions ### Which panel is better: Jinko Solar JKM625-650N-78HL4-BDV or Jinko Solar JKM625-650N-78HL4-BDV (640W)? According to our database: **Jinko Solar JKM625-650N-78HL4-BDV** has higher module efficiency (**23.25%** vs **22.90%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Jinko Solar JKM625-650N-78HL4-BDV and Jinko Solar JKM625-650N-78HL4-BDV (640W)? **Jinko Solar JKM625-650N-78HL4-BDV** has a module efficiency of **23.25%**, while **Jinko Solar **JKM625-650N-78HL4-BDV** (**640 W**)** is **22.90%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Jinko Solar JKM625-650N-78HL4-BDV use vs Jinko Solar JKM625-650N-78HL4-BDV (640W)? **Jinko Solar JKM625-650N-78HL4-BDV** uses **TOPCon** cells; **Jinko Solar **JKM625-650N-78HL4-BDV** (**640 W**)** 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 Jinko Solar JKM625-650N-78HL4-BDV and Jinko Solar JKM625-650N-78HL4-BDV (640W)? **Jinko Solar JKM625-650N-78HL4-BDV** has a **30 years** power warranty; **Jinko Solar **JKM625-650N-78HL4-BDV** (**640 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 Jinko Solar JKM625-650N-78HL4-BDV and Jinko Solar JKM625-650N-78HL4-BDV (640W) bifacial panels? Both **Jinko Solar JKM625-650N-78HL4-BDV** and **Jinko Solar **JKM625-650N-78HL4-BDV** (**640 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 - [Jinko Solar JKM625-650N-78HL4-BDV vs Jinko Solar JKM625-650N-78HL4-BDV (650W)](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-650w) - The same specification on paper - [Jinko Solar JKM625-650N-78HL4-BDV vs Jinko Solar JKM650N-78HL4-BDV-F9-EU](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv/jinko-solar-co-ltd-jkm650n-78hl4-bdv-f9-eu) - The same specification on paper - [Jinko Solar JKM625-650N-78HL4-BDV vs Jinko Solar JKM650N-78HL4-BDV](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv/jinko-solar-jkm650n-78hl4-bdv) - The same specification on paper - [Jinko Solar JKM625-650N-78HL4-BDV vs Jinko Solar JKM625-650N-78HL4-BDV (645W)](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-645w) - The same specification on paper - [Jinko Solar JKM625-650N-78HL4-BDV vs Jinko Solar JKM645N-78HL4-BDV-F9-EU](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv/jinko-solar-co-ltd-jkm645n-78hl4-bdv-f9-eu) - The same specification on paper - [Jinko Solar JKM625-650N-78HL4-BDV vs Jinko Solar JKM645N-78HL4-BDV](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv/jinko-solar-jkm645n-78hl4-bdv) - The same specification on paper --- Source: https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w 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.