--- title: "Jinko Solar JKM620N-66HL4M-BDV 620W Solar Panel - Specs & Review | ComparePV" description: "Jinko Solar JKM620N-66HL4M-BDV 620W solar panel: 4 shop offers from 336 zł. Specs: 22.95% efficiency, Monocrystalline cells." source: "https://comparepv.com/panel/jinko-solar-jkm620n-66hl4m-bdv" updated: 2026-10-03 --- # Jinko Solar JKM620N-66HL4M-BDV Solid all-round for its segment 359 panels in the segment N-type 600-650 W ## Identity - **Manufacturer:** Jinko Solar - **Model:** JKM620N-66HL4M-BDV - **Series:** EAGLE® G7B 615-640W N-type bifacial - **Rated power:** 620 W - **Cell technology:** N-type - **Bifacial:** yes ## Price offers Prices are the figure each shop printed, on that shop's side of VAT. | Shop | Market | Price | Per kWp | Availability | Last read | | --- | --- | --- | --- | --- | --- | | [Panele-Sloneczne.com](https://comparepv.com/go/18049) | Poland | 336 zł net | 541.94 zł/kWp | In stock | Last read 4 Oct 01:14 | | [Eco System Projekt](https://comparepv.com/go/189) | Poland | 435 zł incl. VAT | 701.61 zł/kWp | In stock | Last read 4 Oct 01:09 | | [PVhurt](https://comparepv.com/go/3292) | Poland | 451.27 zł incl. VAT | 727.86 zł/kWp | Not stated | Last read 4 Oct 01:37 | | [TIM SA](https://comparepv.com/go/1112) | Poland | 507.99 zł incl. VAT | 819.34 zł/kWp | In stock | Last read 3 Oct 01:43 | ## How it compares Compared against segment N-type 600-650 W (359 panels). | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Power (Wp) | 620 W | 625 W | Typical | | | Module efficiency | 22.95% | 22.77% | Typical | 2,268 | | Power density | 229.5 | 227.7 | Typical | 2,191 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight (kg) | 32.4 kg | 32.5 kg | Typical | | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | ### Full peer table | Measure | This panel | Segment median | Standing | Rank | | --- | --- | --- | --- | --- | | Module efficiency | 22.95% | 22.77% | Typical | 2,268 | | Power density | 229.5 | 227.7 | Typical | 2,191 | | Temperature coefficient | -0.290 | -0.290 | Typical | 2,165 | | Weight per kWp | 52.3 | 52.7 | Typical | 5,719 | | Performance warranty | 30 yrs | 30 yrs | Typical | 21 | - **Best for:** Commercial, utility-scale and hot-climate. ## Specification ### Electrical - **Rated power (Pmax):** 620 W - **Efficiency:** 22.95 % - **Voltage at Pmax (Vmp):** 40.74 V - **Current at Pmax (Imp):** 15.22 A - **Open-circuit voltage (Voc):** 49.08 V - **Short-circuit current (Isc):** 16.08 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 - **NOCT:** 45 degC ### Cell and construction - **Cell type:** Monocrystalline - **Cell technology:** N-type - **Cell count:** 132 - **Bifacial:** yes ### Physical - **Length:** 2382 mm - **Width:** 1134 mm - **Thickness:** 30 mm - **Weight:** 32.4 kg - **Area:** 2.70 m2 - **Power density:** 229.5 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:** 542 W ## Rank in the whole catalogue | Measure | Position | | --- | --- | | Efficiency | 2268 of 14005 | | Power density | 2191 of 14005 | | Temperature coefficient | 2165 of 14005 | | Weight | 5719 of 14005 | | Warranty | 21 of 14005 | ## Pros - **Highest efficiency in segment** - Peak efficiency of 23.69% (640 Wp) clearly outperforms direct peers: REC Alpha Pro M at 22.5%, Suntech Ultra V Pro at 22.9%, MY Solar HJT at 22.61%. The smaller footprint required for the same power output directly reduces BoS costs in space-constrained installations. - **N-type TOPCon – low degradation & better hot-weather output** - N-type TOPCon cells exhibit zero LID (Light Induced Degradation) and significantly lower LeTID compared to P-type PERC. The power temperature coefficient of -0.29%/°C translates to ~11.6% power loss at a module temperature of 65°C — roughly 2.4 percentage points less than typical PERC (-0.35%/°C), delivering measurably higher summer energy yield. - **Bifacial 80% + dual glass – higher yield & durability** - The ~80% bifaciality factor enables rear-side generation, with 5–15% additional annual energy on high-albedo surfaces (white roofing membranes, gravel, concrete). The dual-glass construction improves resistance to moisture ingress, ammonia, and thermomechanical stress — particularly relevant for ground-mount PV farms and carports. - **30-year linear power warranty (>87.4% guaranteed)** - Jinko guarantees at least 87.4% of rated power after 30 years of operation under a linear power warranty — one of the longest and most robust degradation schedules in the high-wattage module class, surpassing the standard 25-year warranties offered by many competing manufacturers. - **Jinko Solar #1 bankability – BNEF 2025** - The only manufacturer in the world rated 100% bankable by Bloomberg NEF in the 2025 bankability survey (top ranking for the 10th consecutive year). With 86 GW shipped in 2025, Jinko is the global market leader — translating to the lowest manufacturer financial risk and the most straightforward project financing access for banks and infrastructure funds. ## Cons - **Higher temperature coefficient than HJT** - The REC Alpha Pro M at the same power class (640 Wp) delivers a temperature coefficient of -0.24%/°C via HJT technology, meaning only 9.6% power loss at 40°C above STC versus 11.6% for the G7B. In climates with many extreme-heat days (Southern Europe, MENA), this gap can translate to approximately 1–2% lower annual energy yield compared to best-in-class HJT modules. - **Heavier dual-glass module – rooftop load concerns** - The glass-glass (dual glass) construction in the 66-cell format increases module weight to approximately 32–35 kg, compared to ~25–27 kg for equivalent glass-backsheet modules. This may require structural reinforcement analysis or roof strengthening on older residential buildings prior to installation. ## About this series Jinko Solar's EAGLE® G7B 615-640W N-type bifacial series was designed for maximum energy yield where every square meter counts and for stable operation year after year. The key advantage is the **N-type TOPCon cell technology** - less sensitive to typical degradation mechanisms, helping maintain high production over the long term, especially under intensive operation. The use of **bifacial construction** truly increases yield by enabling power generation from both sides - a significant benefit on light-colored roofs, membranes, gravel, and ground-mounted installations. In practice, this series addresses investors' concerns by minimizing performance degradation over time and increasing production in hot conditions thanks to its **favorable temperature coefficient**. The modules are built with **dual-glass** construction, enhancing moisture resistance and durability in challenging environments. This makes them an excellent choice for utility-scale PV farms, carports, and large commercial rooftops, where **high reliability and a long operational lifespan** are key advantages. ## Notable figures - At 22.9% efficiency, this panel is on par with typical \*\*N-type 600-650W\*\* modules - At 229.5 W/m² power density, roof space requirements are typical for \*\*N-type 600-650W\*\* panels - Temperature coefficient of -0.29%/°C matches the \*\*N-type 600-650W\*\* median - Bifacial design (80% factor) captures reflected light - adds 4-12% yield on ground-mount or white roof - In the top 16% for efficiency among all N-type panels ## Questions ### What is the warranty on Jinko Solar EAGLE G7B 615-640W panels? The EAGLE G7B series comes with a 12-year product warranty covering manufacturing defects and a 30-year linear power warranty. This is among the longer power warranties available on the market, meaning the manufacturer guarantees a defined performance level for three decades. Jinko Solar is a Tier 1 manufacturer, which meaningfully increases the practical enforceability of warranty claims. ### Do N-type TOPCon cells in the EAGLE G7B really degrade slower than older PERC panels? Yes. N-type TOPCon technology exhibits lower LID and LeTID degradation rates than P-type PERC cells. In practice, after several years of intensive operation, an EAGLE G7B module should retain a noticeably higher percentage of its rated power compared to a same-generation PERC panel. This is especially valuable in installations with a long payback horizon, such as utility-scale PV farms or large commercial rooftops. ### How much extra energy does the EAGLE G7B bifacial design actually produce? The EAGLE G7B modules have a bifaciality factor of approximately 80%, meaning the rear cell surface can generate up to 80% of the front-side power under equivalent irradiance. Real-world yield gain depends on ground albedo and tilt angle, but on light-colored gravel, white roofing membrane, or grassy terrain, you can typically expect 5–15% more annual energy compared to a monofacial module with the same nameplate wattage. ### Are Jinko EAGLE G7B 640W panels suitable for a residential sloped roof, or are they mainly a utility-scale product? The EAGLE G7B series is primarily designed for commercial and ground-mount installations — dual-glass modules rated up to 640W are larger and heavier than typical residential panels. They work excellently on large sloped roofs such as warehouses or industrial halls. For a standard single-family home, it is worth evaluating the roof's structural load capacity and on-site handling logistics beforehand, as the module's physical dimensions can present a challenge during installation. ### How does the EAGLE G7B series perform in high temperatures — do hot summers significantly cut output? The power temperature coefficient for N-type TOPCon cells in the EAGLE G7B series is approximately -0.29%/°C. This means that when a module heats up to 65°C (40°C above STC), power loss is around 11.6%, while older PERC panels with a coefficient of -0.35%/°C lose about 14% under the same conditions. In sunny, hot climates this difference translates into measurably higher energy yield during summer months. ### Do Jinko EAGLE G7B dual-glass modules require special racking systems? Yes, and this should be factored in at the design stage. Dual-glass modules are heavier than standard backsheet panels and require a mounting structure rated for the higher load. They also lack the frame-mounted grounding holes typical of single-glass modules, so clamp and rail selection must follow the manufacturer's mounting specifications. Most reputable racking manufacturers offer solutions certified for dual-glass modules. ## Datasheet [Manufacturer datasheet (PDF)](https://comparepv.com/datasheets/30mm-eagle-g7b-jkm615-640n-66hl4m-bdv-f1-us-666e14a8f8be.pdf) ## Alternatives | Panel | Power | How it differs | | --- | --- | --- | | [AIKO AIKO-A650-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a650-mae72mw) | 650 W | +30 W, lighter, +2.2 pp | | [AIKO AIKO-A645-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a645-mae72mw) | 645 W | Cooler, lighter, +2.1 pp | | [AIKO AIKO-G670-MCH72Mw](https://comparepv.com/panel/aiko-aiko-g670-mch72mw) | 670 W | +50 W, lighter, +1.9 pp | | [Longi Solar LR7-72HVHF-670M](https://comparepv.com/panel/longi-lr7-72hvhf-670m) | 670 W | +50 W, lighter, +1.9 pp | | [AIKO AIKO-A640-MAE72Mw](https://comparepv.com/panel/aiko-aiko-a640-mae72mw) | 640 W | Cooler, lighter, +1.9 pp | | [Jinko Solar JKM650-670N-66QL6-BDV (670W class)](https://comparepv.com/panel/jinko-solar-jkm650-670n-66ql6-bdv-670w-class) | 670 W | +50 W, cooler, +1.9 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 | -15 W, -0.6 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 | -10 W, -0.4 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 | Very close match | | [AIKO AIKO-A680-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a680-mde72mw) | 680 W | +60 W, lighter, +2.2 pp | | [AIKO AIKO-A675-MDE72Mw](https://comparepv.com/panel/aiko-aiko-a675-mde72mw) | 675 W | +55 W, lighter, +2.1 pp | | [AIKO AIKO-A700-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a700-mae78dw) | 700 W | +80 W, cooler, +2.1 pp | | [AIKO AIKO-A695-MAE78Dw](https://comparepv.com/panel/aiko-aiko-a695-mae78dw) | 695 W | +75 W, cooler, +1.9 pp | --- Source: https://comparepv.com/panel/jinko-solar-jkm620n-66hl4m-bdv 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.