--- title: "Jinko Solar JKM640N-66HL4M-BDX-Z1-EU Solar Panel: Specs & Datasheet | ComparePV" description: "Jinko Solar JKM640N-66HL4M-BDX-Z1-EU solar panel. Specs: 23.69% efficiency, Monocrystalline cells, dimensions, warranty and temperature coefficient." source: "https://comparepv.com/panel/jinko-solar-jkm640n-66hl4m-bdx-z1-eu" image: "https://comparepv.com/og/panel/jinko-solar-jkm640n-66hl4m-bdx-z1-eu.png" updated: 2026-09-11 --- # Jinko Solar JKM640N-66HL4M-BDX-Z1-EU Space saver, heavy for its output 1,085 panels in the segment TOPCon 600-650 W ## Identity - **Manufacturer:** Jinko Solar - **Model:** JKM640N-66HL4M-BDX-Z1-EU - **Series:** Tiger Neo 66HL4M-BDX - **Rated power:** 640 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) | 640 W | 620 W | Strong - top 9% | | | Module efficiency | 23.69% | 22.80% | Strong - top 5% | 612 | | Power density | 236.9 | 227.7 | Strong - top 4% | 553 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | 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 | 23.69% | 22.80% | Strong - top 5% | 612 | | Power density | 236.9 | 227.7 | Strong - top 4% | 553 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,220 | | Weight per kWp | 60.6 | 53.1 | Weak - bottom 1% | 12,593 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Strengths - **236.9 watts per square metre** - Top 4% of the TOPCon 600-650 W segment, against a median of 227.7. Ranked 553rd in the whole database. - **23.69% module efficiency** - Top 5% of the TOPCon 600-650 W segment, against a median of 22.80%. Ranked 612th in the whole database. ### Watch out for - **60.6 kg per kWp** - Bottom 1% of the TOPCon 600-650 W segment, against a median of 53.1. Ranked 12,593rd in the whole database. - **Best for:** Commercial, utility-scale and shaded-installations. - **Not ideal for:** Weight-limited structures. ## Specification ### Electrical - **Rated power (Pmax):** 640 W - **Efficiency:** 23.69 % - **Voltage at Pmax (Vmp):** 41.30 V - **Current at Pmax (Imp):** 15.50 A - **Open-circuit voltage (Voc):** 49.88 V - **Short-circuit current (Isc):** 16.32 A - **Max system voltage:** 1500 V ### Temperature - **Temperature coefficient of Pmax:** -0.290 %/degC - **Temperature coefficient of Voc:** -0.250 %/degC - **Temperature coefficient of Isc:** 0.045 %/degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** TOPCon - **Cell count:** 132 - **Bifacial:** yes ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 38.8 kg - **Area:** 2.70 m2 - **Power density:** 236.9 Wp/m2 ### Warranty and degradation - **Product warranty:** 12 years - **Performance warranty:** 30 years - **Output guaranteed at end of warranty:** 87.4 % - **First-year degradation:** 1.00 % - **Annual degradation:** 0.40 % - **Output after 30 years:** 559 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 612 of 14129 | | Power density | 553 of 14129 | | Temperature coefficient | 2220 of 14129 | | Weight | 12593 of 14129 | | Warranty | 21 of 14129 | ## Pros - **Up to 24.06% efficiency in N-type TOPCon class** - N-type TOPCon half-cut cells with Super Multi Busbar technology deliver 23.14-24.06% efficiency, placing the series on par with BYD AURO N NLBK-39 (23.25%) and Astronergy ASTRO N5 (23.30%), with lower LID/LeTID degradation than older PERC cells. - **30-year linear power warranty** - The manufacturer guarantees a minimum of 87.4% nominal power after 30 years of operation, matching premium TOPCon segment standards and substantially exceeding the typical 25-year warranties of older PERC-generation modules. - **Dual-glass bifacial construction** - The glass-glass module design with a photovoltaically active rear side captures additional energy from reflected light, particularly effective on high-albedo surfaces (light-colored roofs, gravel, snow), meaningfully reducing LCOE in commercial and ground-mount installations. - **Reinforced frame for high mechanical loads** - Tempered glass on both sides combined with a reinforced frame provides high mechanical resistance to snow and wind loads, an important factor for installations in harsher climates and a driver of predictable revenue over the full operating lifetime. - **BNEF Tier-1 bankability status** - JinkoSolar appears on the BloombergNEF Tier 1 list (confirmed in Q1 and Q2 2026), easing non-recourse debt financing for PV projects and increasing institutional investor confidence relative to manufacturers outside this list. ## Cons - **Historical Tier-1 status volatility** - JinkoSolar was temporarily removed from the BloombergNEF Tier 1 list in Q2 2024, with status only reinstated in subsequent quarters (reconfirmed in Q1/Q2 2026). For investors assessing long-term financing risk, this signals that manufacturer bankability is not permanently guaranteed and warrants ongoing verification with each financing tranche. ## About this series The **Tiger Neo 66HL4M-BDX** series is a bifacial glass-glass photovoltaic module designed for commercial and utility-scale installations, where maximizing output from every square meter of roof or ground really matters. The use of **N-type TOPCon** cells in a half-cut configuration together with **Super Multi Busbar** technology reduces resistive losses and improves current collection, allowing the panel to maintain high efficiency even under diffuse light and elevated operating temperatures. The **bifacial** design enables additional energy harvest from the rear side of the module, meaningfully boosting energy yield on high-albedo surfaces such as light-colored roofing, sandy terrain, or snow-covered ground. This addresses the low performance of conventional single-sided panels in projects where every extra kilowatt-hour counts. A reinforced frame and tempered glass on both sides provide resistance to heavy snow and wind loads, while a low annual degradation rate translates into stable, predictable revenue over the entire lifetime of the installation. The panel suits PV plant investors and installers seeking low LCOE and long-term reliability, standing out from the competition through its combination of performance, durability, and mounting flexibility. ## Notable figures - 23.7% module efficiency - 0.9pp better than the \*\*TOPCon 600-650W\*\* median of 22.8% - 236.9 W/m² power density - 9.2 W/m² more than \*\*TOPCon 600-650W\*\* median (227.7 W/m²), more power per roof area - At -0.29%/°C, hot weather performance is typical for \*\*TOPCon 600-650W\*\* panels - Weight of 38.8 kg is 6.0 kg above \*\*TOPCon 600-650W\*\* median (32.8 kg) - verify structural support - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof ## Questions ### What is the maximum power output and efficiency of the Jinko Tiger Neo 66HL4M-BDX panel? The panel delivers up to 650 Wp with module efficiency reaching around 24%. This is achieved through 132 N-type TOPCon half-cut cells combined with Super Multi Busbar technology, which reduces resistive losses. Higher unit power means fewer modules are needed to reach a target system capacity, lowering mounting structure and installation labor costs. ### How much extra energy does the bifacial design of this panel produce? Thanks to glass on both sides, the Tiger Neo 66HL4M-BDX captures light reflected off the rear surface. In practice, over high-albedo ground such as gravel, white roofing, or snow, the additional energy gain can range from a few percent up to the low teens compared to a monofacial panel. Actual gain depends on mounting height, ground albedo, and tilt angle. ### What warranty comes with the Tiger Neo 66HL4M-BDX series? Jinko offers a 12-year product warranty and a 30-year linear power warranty, guaranteeing at least 87.4% of rated power at the end of that period. The first year is covered at 99% power retention. This is standard among tier 1 manufacturers and gives investors predictable revenue from the installation over its full lifespan. ### How does N-type TOPCon technology differ from conventional PERC cells? N-type TOPCon cells feature an extra thin passivating oxide layer that reduces carrier recombination and boosts efficiency compared to older P-type PERC cells. The result is higher unit power, a lower annual degradation rate, and better performance under diffuse light and elevated temperatures, translating into higher annual energy yield. ### Is the Tiger Neo 66HL4M-BDX suitable for ground-mounted solar farms? Yes, this series is designed for commercial and industrial-scale projects, including large ground-mounted farms. A reinforced frame and tempered glass on both sides provide resistance to snow and wind loads, while the bifacial design further increases yield when installed over high-albedo ground surfaces typical of utility-scale ground-mount installations. ### How does the panel perform at high operating temperatures? Thanks to N-type TOPCon technology, the panel has a low power temperature coefficient of around -0.29%/°C, meaning it loses less power as temperature rises compared to typical PERC modules. This results in more stable energy production on hot summer days and smaller efficiency losses in high-irradiance, high-ambient-temperature climates. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/JKM625-650N-66HL4M-BDX-Z1-EU-9-e360ec326768.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | Cooler, lighter, +1.5 pp | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +40 W, lighter, +1.5 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +35 W, lighter, +1.3 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +1.3 pp | | [WINAICO WST-675BKX72-A2](https://comparepv.com/panel/winaico-wst-675bkx72-a2) | 675 W | +35 W, lighter, +1.3 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +30 W, lighter, +1.1 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +30 W, lighter, +1.1 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 | -35 W, lighter, -1.3 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 | -30 W, lighter, -1.1 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 | -25 W, lighter, -0.9 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +60 W, lighter, +1.3 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +55 W, lighter, +1.2 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +30 W, lighter, +1.1 pp | --- Source: https://comparepv.com/panel/jinko-solar-jkm640n-66hl4m-bdx-z1-eu Not in this file, on the page: a thirty-year output simulator, a bifacial gain calculator and alternatives filtered by how closely they match these dimensions.