--- title: "Jinko Solar JKM645N-66QL6-BDX Solar Panel: Specs & Datasheet | ComparePV" description: "Jinko Solar JKM645N-66QL6-BDX solar panel. Specs: 23.88% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/jinko-solar-jkm645n-66ql6-bdx" image: "https://comparepv.com/og/panel/jinko-solar-jkm645n-66ql6-bdx.png" updated: 2026-09-11 --- # Jinko Solar JKM645N-66QL6-BDX Strong in heat, heavy for its output 1,085 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** Jinko Solar - **Model:** JKM645N-66QL6-BDX - **Series:** Tiger Neo III - **Rated power:** 645 W - **Cell technology:** TOPCon - **Bifacial:** yes ## How it compares Compared against segment TOPCon 600-650 W (1085 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 645 W | 620 W | Strong - top 3% | | | Module efficiency | 23.88% | 22.80% | Strong - top 2% | 421 | | Power density | 238.8 | 227.7 | Strong - top 1% | 383 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 1% | 515 | | Weight (kg) | 38.8 kg | 32.8 kg | Weak - bottom 1% | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 23.88% | 22.80% | Strong - top 2% | 421 | | Power density | 238.8 | 227.7 | Strong - top 1% | 383 | | Temperature coefficient | -0.260 | -0.290 | Strong - top 1% | 515 | | Weight per kWp | 60.2 | 53.1 | Weak - bottom 1% | 12,466 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **-0.260 %/°C temperature coefficient** - Top 1% of the TOPCon 600-650 W segment, against a median of -0.290. Ranked 515th in the whole database. - **238.8 watts per square metre** - Top 1% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 383rd in the whole database. - **23.88% module efficiency** - Top 2% of the TOPCon 600-650 W segment, against a median of 22.80%. Ranked 421st in the whole database. ### Watch out for - **60.2 kg per kWp** - Bottom 1% of the TOPCon 600-650 W segment, against a median of 53.1. Ranked 12,466th in the whole database. - **Best for:** Residential, commercial, utility-scale and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 645 W - **Efficiency:** 23.88 % - **Voltage at Pmax (Vmp):** 42.27 V - **Current at Pmax (Imp):** 15.26 A - **Open-circuit voltage (Voc):** 49.88 V - **Short-circuit current (Isc):** 15.98 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.260 %/degC - **Temperature coefficient of Voc:** -0.240 %/degC - **Temperature coefficient of Isc:** 0.046 %/degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 264 - **Bifacial:** yes ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 38.8 kg - **Area:** 2.70 m2 - **Power density:** 238.8 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 88.8 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.35 % - **Output after 30 years:** 573 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 421 of 14129 | | Power density | 383 of 14129 | | Temperature coefficient | 515 of 14129 | | Weight | 12466 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Latest-gen N-type TOPCon cells** - Third-generation TOPCon cells with ~27% cell-level efficiency deliver 24.8% module efficiency and a declared degradation profile of 1% in year one followed by 0.4%/year linear thereafter - a meaningful improvement over legacy PERC modules. - **High power density up to 670 Wp** - Unit power up to 670 Wp with efficiency up to 24.8% reduces the module count and roof/ground area needed to hit a target array size, directly lowering BoS costs (racking, wiring, installation labor). - **Bifacial design with 85±5% bifaciality** - The bifacial variant of the series reaches an 85±5% bifaciality factor, adding 553-570 W of rear-side output under optimal conditions - notably higher than the 70-75% typical of competing BC-technology panels. - **30-year linear power warranty** - Power warranty extends to 30 years with a low 0.4% annual degradation rate, one of the longer coverage periods on the market and a supportive factor for low LCOE in project financial models. - **Tier-1, bankable manufacturer** - Jinko Solar has operated since 2006 and holds tier-1 bankable status, easing project financing for commercial installations and supporting favorable insurance terms. ## Cons - **No efficiency edge over rivals** - The AIKO Comet 2U (AIKO-G-MCH72Mw) matches the same 24.8% peak efficiency at the same 670 Wp power rating, so Tiger Neo III is no longer the clear efficiency leader within its comparable peer set. - **Uneven product warranty across variants** - Product warranty ranges from 12 to 25 years depending on the variant - lower-tier models in the series only carry a 12-year product warranty versus the flagship 25 years, requiring careful variant selection at purchase. ## About this series The **Tiger Neo III** series represents the third generation of Jinko Solar's flagship modules, built on the latest **N-type TOPCon** technology, which limits cell degradation and maintains stable power output throughout the entire lifespan of the installation. The panels use a **half-cut** cell structure combined with advanced multi-busbar interconnections, reducing resistive losses and improving mechanical resistance to micro-cracks. Thanks to its **bifacial design**, the module also captures solar radiation from the rear side, generating additional energy from reflected and diffuse light - a solution especially valued by investors installing systems on light-colored surfaces, flat roofs, or ground-mounted solar farms. The series also stands out with a low temperature coefficient, translating into better performance on hot days and more stable output under low-irradiance conditions. Tiger Neo III answers the market's growing demand for high power density panels that reduce the surface area needed to reach a given system capacity, lowering overall **BoS** costs. It is a solid choice for both residential and commercial investors seeking proven, bankable technology backed by a long-term warranty and a low **LCOE**. ## Notable figures - 23.9% module efficiency - 1.1pp better than the \*\*TOPCon 600-650W\*\* median of 22.8% - At 238.8 W/m² power density, this panel generates 11.1 W/m² more per unit area than \*\*TOPCon 600-650W\*\* median (227.7 W/m²) - -0.26%/°C temperature coefficient (median: -0.29%/°C) - retains ~1% more power at high temperatures - At 38.8 kg, this panel is 6.0 kg heavier than the \*\*TOPCon 600-650W\*\* median (32.8 kg) - more demanding for installation crews - Bifaciality factor of 85% can add 4-13% extra yield with reflective mounting surface ## Questions ### What makes the TOPCon technology in Tiger Neo III different from standard PERC panels? The N-type TOPCon cells used in the Tiger Neo III feature an additional passivation layer that reduces carrier recombination and lowers module degradation over time compared to conventional P-type PERC cells. As a result, the panel maintains higher energy yield throughout its service life, with lower first-year and long-term degradation than older cell technologies. ### What is the maximum power output of the Jinko Tiger Neo III panel, and how many modules are needed for a typical 10 kWp installation? Panels in the Tiger Neo III series reach a maximum power of up to 670 Wp. For a 10 kWp installation, roughly 15 modules from this series are sufficient, fewer than with older 400-450 W panels. The high power density reduces the roof area needed to reach a target installation capacity and lowers BoS costs for the mounting structure. ### What warranty applies to the Tiger Neo III series? Jinko Solar provides a 25-year product warranty and a 30-year power output warranty for the Tiger Neo III series. This means the manufacturer covers not only material and workmanship defects but also guarantees a specified level of energy performance over three decades, making this series one of the more bankable offerings on the market. ### Are Tiger Neo III panels suitable for a pitched roof on a single-family home? Yes, Tiger Neo III modules are a popular choice for residential installations on pitched roofs. The half-cut cell structure and multi-busbar interconnections increase resistance to microcracks that can occur during transport and installation, and the high per-panel power output allows more system capacity to fit on a limited pitched roof area. ### How do Tiger Neo III panels perform on hot days and in low-light conditions? The Tiger Neo III series has a low temperature coefficient of power, so it loses less efficiency during heat waves than older module generations when cell temperature rises above standard test conditions. N-type TOPCon technology also responds better to weak and diffuse light, resulting in more stable energy production on cloudy days and during early morning or evening hours. ### Is Jinko Solar a tier 1 manufacturer, and can it be trusted for a long-term investment? Yes, Jinko Solar is classified as a tier 1 manufacturer, meaning stable financial standing, high production volume, and a long-established global presence. This matters in practice for a 25-30-year warranty, as it increases the likelihood the manufacturer will be able to honor warranty claims throughout the system's service life, which is relevant for both residential and commercial investors. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/JKM645-670N-66QL6-BDX-Pre2-E1-EU-57f711d90f74.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Lighter, +1.3 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +35 W, lighter, +1.3 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +30 W, lighter, +1.1 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Lighter, +1.1 pp | | [WINAICO WST-675BKX72-A2](https://comparepv.com/panel/winaico-wst-675bkx72-a2) | 675 W | +30 W, lighter, +1.1 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +50 W, lighter, +1.0 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +25 W, lighter, +0.9 pp | | [Jinko Solar JKM605-630N-66HL4M-BDV-F3-EN (605W column)](https://comparepv.com/panel/jinko-solar-jkm605-630n-66hl4m-bdv-f3-en-605w-column) | 605 W | -40 W, lighter, -1.5 pp | | [Jinko Solar JKM605-630N-66HL4M-BDV-F3-EN (610W column)](https://comparepv.com/panel/jinko-solar-jkm605-630n-66hl4m-bdv-f3-en-610w-column) | 610 W | -35 W, lighter, -1.3 pp | | [Jinko Solar JKM605-630N-66HL4M-BDV-F3-EN (615W column)](https://comparepv.com/panel/jinko-solar-jkm605-630n-66hl4m-bdv-f3-en-615w-column) | 615 W | -30 W, lighter, -1.1 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +55 W, lighter, +1.1 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +25 W, lighter, +0.9 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +25 W, lighter, +0.9 pp | --- Source: https://comparepv.com/panel/jinko-solar-jkm645n-66ql6-bdx Not in this file, on the page: the I-V and temperature curves lifted from the manufacturer's datasheet, a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.