--- title: "Jinko Solar JKM625-650N-78HL4-BDV (640W) vs Jinko Solar JKM625-650N-78HL4-BDV (645W) - Solar Panel Comparison | ComparePV" description: "Compare Jinko Solar JKM625-650N-78HL4-BDV (640W) vs Jinko Solar JKM625-650N-78HL4-BDV (645W) 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-640w/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-645w" updated: 2026-09-11 --- # Jinko Solar JKM625-650N-78HL4-BDV (640W) vs Jinko Solar JKM625-650N-78HL4-BDV (645W) Identical on every published parameter All 19 comparable parameters agree. 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 JKM625-650N-78HL4-BDV (640W)](https://comparepv.com/panel/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w) | [Jinko Solar JKM625-650N-78HL4-BDV (645W)](https://comparepv.com/panel/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-645w) | | Manufacturer | Jinko Solar | Jinko Solar | | Power | 640 Wp | 645 Wp | | Efficiency | 22.90 % | 23.07 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | (640W) | (645W) | | --- | --- | --- | | Rated power | 640 Wp | 645 Wp | | Module efficiency | 22.90 % | 23.07 % | | Power density | 229.0 Wp/m² | 230.7 Wp/m² | | Open-circuit voltage | 57.34 V | 57.47 V | | Voltage at max power | 48.02 V | 48.17 V | | Short-circuit current | 13.98 A | 14.04 A | | Current at max power | 13.33 A | 13.39 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 | 53.1 kg/kWp | 52.7 kg/kWp | | Product warranty | 12 yrs | 12 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 | 156 | 156 | | 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, (640W):** 21,473 kWh - **Cumulative output, (645W):** 21,641 kWh - **Gap:** 168 kWh ## Output when hot | Condition | Cell temperature | (640W) | (645W) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 640 W | 645 W | 100.0% of rated power | | Cool, bright day | 40 °C | 612 W | 617 W | 95.7% of rated power | | Typical summer roof | 55 °C | 584 W | 589 W | 91.3% of rated power | | Hot roof | 70 °C | 556 W | 561 W | 87.0% of rated power | ## Against the whole database | Measure | (640W) | (645W) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #2,359 | #1,683 | 14,005 | (645W) leads by 676 places | | Power density | #2,389 | #1,654 | 14,005 | (645W) leads by 735 places | | Heat behaviour | #2,165 | #2,165 | 14,005 | Tied - the same position in the database | | Weight | #6,913 | #6,362 | 14,005 | (645W) leads by 551 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #2,068 | #1,852 | 14,005 | (645W) leads by 216 places | ## Questions ### Which panel is better: Jinko Solar JKM625-650N-78HL4-BDV (640W) or Jinko Solar JKM625-650N-78HL4-BDV (645W)? According to our database: **Jinko Solar JKM625-650N-78HL4-BDV (**645 W**)** has higher module efficiency (**23.07%** 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 (640W) and Jinko Solar JKM625-650N-78HL4-BDV (645W)? **Jinko Solar JKM625-650N-78HL4-BDV (**640 W**)** has a module efficiency of **22.90%**, while **Jinko Solar JKM625-650N-78HL4-BDV (**645 W**)** is **23.07%**. 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 (640W) use vs Jinko Solar JKM625-650N-78HL4-BDV (645W)? **Jinko Solar JKM625-650N-78HL4-BDV (**640 W**)** uses **TOPCon** cells; **Jinko Solar JKM625-650N-78HL4-BDV (**645 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 (640W) and Jinko Solar JKM625-650N-78HL4-BDV (645W)? **Jinko Solar JKM625-650N-78HL4-BDV (**640 W**)** has a **30 years** power warranty; **Jinko Solar JKM625-650N-78HL4-BDV (**645 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 (640W) and Jinko Solar JKM625-650N-78HL4-BDV (645W) bifacial panels? Both **Jinko Solar JKM625-650N-78HL4-BDV (**640 W**)** and **Jinko Solar JKM625-650N-78HL4-BDV (**645 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 (640W) vs Jinko Solar JKM625-650N-78HL4-BDV (650W)](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-650w) - 3 differences, the largest is module efficiency - [Jinko Solar JKM625-650N-78HL4-BDV (640W) vs Jinko Solar JKM625-650N-78HL4-BDV](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv) - 3 differences, the largest is module efficiency - [Jinko Solar JKM625-650N-78HL4-BDV (640W) vs Jinko Solar JKM650N-78HL4-BDV-F9-EU](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w/jinko-solar-co-ltd-jkm650n-78hl4-bdv-f9-eu) - 3 differences, the largest is module efficiency - [Jinko Solar JKM625-650N-78HL4-BDV (640W) vs Jinko Solar JKM650N-78HL4-BDV](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w/jinko-solar-jkm650n-78hl4-bdv) - 3 differences, the largest is module efficiency - [Jinko Solar JKM625-650N-78HL4-BDV (640W) vs Jinko Solar JKM645N-78HL4-BDV-F9-EU](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w/jinko-solar-co-ltd-jkm645n-78hl4-bdv-f9-eu) - The same specification on paper - [Jinko Solar JKM625-650N-78HL4-BDV (640W) vs Jinko Solar JKM645N-78HL4-BDV](https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w/jinko-solar-jkm645n-78hl4-bdv) - The same specification on paper --- Source: https://comparepv.com/compare/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-640w/jinko-solar-co-ltd-jkm625-650n-78hl4-bdv-645w 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.