--- title: "Jinko Solar JKM650-670N-66QL6-BDV (660W class) vs Jinko Solar JKM650-670N-66QL6-BDV (665W class) - Solar Panel Comparison | ComparePV" description: "Compare Jinko Solar JKM650-670N-66QL6-BDV (660W class) vs Jinko Solar JKM650-670N-66QL6-BDV (665W class) 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-jkm650-670n-66ql6-bdv-660w-class/jinko-solar-jkm650-670n-66ql6-bdv-665w-class" updated: 2026-09-11 --- # Jinko Solar JKM650-670N-66QL6-BDV (660W class) vs Jinko Solar JKM650-670N-66QL6-BDV (665W class) 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 JKM650-670N-66QL6-BDV (660W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-660w-class) | [Jinko Solar JKM650-670N-66QL6-BDV (665W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-665w-class) | | Manufacturer | Jinko Solar | Jinko Solar | | Power | 660 Wp | 665 Wp | | Efficiency | 24.43 % | 24.62 % | | Technology | TOPCon | TOPCon | ## Every compared parameter | Parameter | (660W class) | (665W class) | | --- | --- | --- | | Rated power | 660 Wp | 665 Wp | | Module efficiency | 24.43 % | 24.62 % | | Power density | 244.3 Wp/m² | 246.2 Wp/m² | | Open-circuit voltage | 50.62 V | 50.80 V | | Voltage at max power | 42.83 V | 42.96 V | | Short-circuit current | 16.10 A | 16.16 A | | Current at max power | 15.41 A | 15.48 A | | Temperature coefficient | -0.260 %/°C | -0.260 %/°C | | Dimensions | 2382x1134x30 mm | 2382x1134x30 mm | | Module area | 2.701 m² | 2.701 m² | | Weight | 32.5 kg | 32.5 kg | | Weight per kWp | 49.2 kg/kWp | 48.9 kg/kWp | | Product warranty | 12 yrs | 12 yrs | | Performance warranty | 30 yrs | 30 yrs | | Annual degradation | 0.35 %/yr | 0.35 %/yr | | Cell technology | TOPCon | TOPCon | | Cell type | Monocrystalline | Monocrystalline | | Cell count | - | - | | 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 (-0.260 %/°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, (660W class):** 22,317 kWh - **Cumulative output, (665W class):** 22,486 kWh - **Gap:** 169 kWh ## Output when hot | Condition | Cell temperature | (660W class) | (665W class) | Retained | | --- | --- | --- | --- | --- | | Standard test conditions | 25 °C | 660 W | 665 W | 100.0% of rated power | | Cool, bright day | 40 °C | 634 W | 639 W | 96.1% of rated power | | Typical summer roof | 55 °C | 609 W | 613 W | 92.2% of rated power | | Hot roof | 70 °C | 583 W | 587 W | 88.3% of rated power | ## Against the whole database | Measure | (660W class) | (665W class) | Out of | Note | | --- | --- | --- | --- | --- | | Efficiency | #87 | #42 | 14,005 | (665W class) leads by 45 places | | Power density | #88 | #42 | 14,005 | (665W class) leads by 46 places | | Heat behaviour | #511 | #511 | 14,005 | Tied - the same position in the database | | Weight | #2,811 | #2,555 | 14,005 | (665W class) leads by 256 places | | Warranty | #21 | #21 | 14,005 | Tied - the same position in the database | | Overall | #801 | #634 | 14,005 | (665W class) leads by 167 places | ## Questions ### Which panel is better: Jinko Solar JKM650-670N-66QL6-BDV (660W class) or Jinko Solar JKM650-670N-66QL6-BDV (665W class)? According to our database: **Jinko Solar JKM650-670N-66QL6-BDV (**665 W** class)** has higher module efficiency (**24.62%** vs **24.43%**). See the full spec comparison and 30-year energy simulation above for a complete picture. ### What is the efficiency of Jinko Solar JKM650-670N-66QL6-BDV (660W class) and Jinko Solar JKM650-670N-66QL6-BDV (665W class)? **Jinko Solar JKM650-670N-66QL6-BDV (**660 W** class)** has a module efficiency of **24.43%**, while **Jinko Solar JKM650-670N-66QL6-BDV (**665 W** class)** is **24.62%**. Higher efficiency means more electricity from the same roof area - useful when space is limited. ### What cell technology does Jinko Solar JKM650-670N-66QL6-BDV (660W class) use vs Jinko Solar JKM650-670N-66QL6-BDV (665W class)? **Jinko Solar JKM650-670N-66QL6-BDV (**660 W** class)** uses **TOPCon** cells; **Jinko Solar JKM650-670N-66QL6-BDV (**665 W** class)** 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 JKM650-670N-66QL6-BDV (660W class) and Jinko Solar JKM650-670N-66QL6-BDV (665W class)? **Jinko Solar JKM650-670N-66QL6-BDV (**660 W** class)** has a **30 years** power warranty; **Jinko Solar JKM650-670N-66QL6-BDV (**665 W** class)** 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 JKM650-670N-66QL6-BDV (660W class) and Jinko Solar JKM650-670N-66QL6-BDV (665W class) bifacial panels? Both **Jinko Solar JKM650-670N-66QL6-BDV (**660 W** class)** and **Jinko Solar JKM650-670N-66QL6-BDV (**665 W** class)** 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 JKM650-670N-66QL6-BDV (660W class) vs Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/compare/jinko-solar-jkm650-670n-66ql6-bdv-660w-class/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) - 3 differences, the largest is module efficiency - [Jinko Solar JKM650-670N-66QL6-BDV (660W class) vs Jinko Solar JKM650-670N-66QL6-BDV-F2-EU (670W)](https://comparepv.com/compare/jinko-solar-jkm650-670n-66ql6-bdv-660w-class/jinko-solar-jkm650-670n-66ql6-bdv-f2-eu-670w) - 3 differences, the largest is module efficiency - [Jinko Solar JKM650-670N-66QL6-BDV (660W class) vs Jinko Solar JKM645-670N-66QL6-BDV-L](https://comparepv.com/compare/jinko-solar-jkm650-670n-66ql6-bdv-660w-class/jinko-solar-jkm645-670n-66ql6-bdv-l) - 4 differences, the largest is module efficiency - [Jinko Solar JKM650-670N-66QL6-BDV (660W class) vs Jinko Solar JKM670N-66QL6-BDV-F4-EU](https://comparepv.com/compare/jinko-solar-jkm650-670n-66ql6-bdv-660w-class/jinko-solar-jkm670n-66ql6-bdv-f4-eu) - 4 differences, the largest is module efficiency - [Jinko Solar JKM650-670N-66QL6-BDV (660W class) vs Jinko Solar JKM650-670N-66QL6-BDV-F2-EU (665W)](https://comparepv.com/compare/jinko-solar-jkm650-670n-66ql6-bdv-660w-class/jinko-solar-jkm650-670n-66ql6-bdv-f2-eu-665w) - The same specification on paper - [Jinko Solar JKM650-670N-66QL6-BDV (660W class) vs Jinko Solar JKM665N-66QL6-BDV-AntiGlare-F1-EU](https://comparepv.com/compare/jinko-solar-jkm650-670n-66ql6-bdv-660w-class/jinko-solar-jkm665n-66ql6-bdv-antiglare-f1-eu) - One difference: cell technology --- Source: https://comparepv.com/compare/jinko-solar-jkm650-670n-66ql6-bdv-660w-class/jinko-solar-jkm650-670n-66ql6-bdv-665w-class 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.