Jinko 620 W vs 720 W Solar Panel: Two Frames, Two Currents
The 620 W and the 720 W are the two large-format Jinko panels buyers look up by their wattage, and they are not two sizes of one design. Each has 132 cells, but the 720 W uses a wider frame, and the wider cell brings a higher current with it. This page compares the JKM620N-66HL4M-BDV-F6 with the JKM720N-66HL5-BDV-Z6 from their two records. The voltage barely moves between them. The current, the width, the weight and the pallet all do, and those four rows decide whether the bigger panel suits a given inverter, a given structure and a given crew.
Specifications side by side
Every figure in this table is read from the product’s own record — the same rows each product page shows.
| Specification | Jinko N-Type Bifacial Solar Panel 620 W | Jinko N-Type Bifacial Solar Panel 720 W |
|---|---|---|
| Maximum Power (Pmax) | 620 W | 720 W |
| Module Efficiency | 22.95 % | 23.18 % |
| Open Circuit Voltage (Voc) | 49.08 V | 49.04 V |
| Temperature Coefficient of Pmax | -0.29 % | -0.29 % |
| Voltage at Maximum Power (Vmpp) | 40.74 V | 40.89 V |
| Current at Maximum Power (Impp) | 15.22 A | 17.61 A |
| Short Circuit Current (Isc) | 16.08 A | 18.67 A |
| Cell Technology | N-type Mono-crystalline | N- type Mono-crystalline |
| Power Output Tolerance | 0 ~ 3 % | 0 ~ 3 % |
| Maximum Series Fuse Rating | 35 A | 35 A |
| Temperature Coefficient of Voc | -0.25 % | -0.25 % |
| Temperature Coefficient of Isc | 0.045 % | 0.045 % |
| Number of Cells | 132 | 132 |
| Dimensions (W×H×D) | 2382×1134×30 mm | 2384×1303×33 mm |
| Weight | 32.4 kg | 37.5 kg |
| Front Glass | 2.0 mm, Anti-reflection Coating | 2.0 mm, Anti-Reflection Coating |
| Back Glass | 2.0 mm, Heat Strengthened Glass | 2.0 mm, Heat Strengthened Glass |
| Frame Material | Anodized Aluminium Alloy | Anodized Aluminium Alloy |
| Junction Box | IP68 Rated | IP68 Rated |
| Connector Type | JK03M/MC4/Others* | JK03M/JK03M2/Others* |
| Pallet Dimensions | 2396X1110×1251 mm | 1325×1121×2496 mm |
| Packing Detail | 36 pcs/pallets, 72 pcs/stack, | 33 pcs/pallets, |
| Protection Class | Class II | Class II |
| Fire Rating | Class C | Class C |
| Warranty | 12 Years Product, 30 Years Performance | 12 Years Product, 30 Years Performance |
| Price | AED 385 | AED 447 |
Power and efficiency
The 66HL4M-BDV-F6 is rated 620 W at a module efficiency of 22.95 %. The 66HL5-BDV-Z6 is rated 720 W at a module efficiency of 23.18 %. Both records give a temperature coefficient of Pmax of -0.29 %/°C and a power tolerance of 0 to +3 %. The efficiency gap is small; most of the extra hundred watts is extra glass.
Current: the row to check against the inverter
The 66HL4M-BDV-F6 has a Voc of 49.08 V and a Vmpp of 40.74 V, with an Impp of 15.22 A and an Isc of 16.08 A. The 66HL5-BDV-Z6 has a Voc of 49.04 V and a Vmpp of 40.89 V, with an Impp of 17.61 A and an Isc of 18.67 A. The voltages are almost the same, so the two string to the same length. The current is not: an MPPT input has a maximum input current and a maximum short-circuit current of its own, and the 720 W must be checked against both before it is ordered. Both records state a 35 A maximum series fuse rating.
Frame, weight and pallet
The 66HL4M-BDV-F6 measures 2382×1134×30 mm and weighs 32.4 kg; its record packs 36 panels to a pallet. The 66HL5-BDV-Z6 measures 2384×1303×33 mm and weighs 37.5 kg; its record packs 33 panels to a pallet. The length is practically shared and the width is not, so clamp zones, rail lengths and row spacing are different for the two. Each record lists 2.0 mm front glass with an anti-reflection coating and 2.0 mm heat-strengthened back glass.
Which one for which project
On a rooftop, where panels are carried by hand and the structure was laid out for a standard width, the 66HL4M-BDV-F6 is the easier panel and the one more string inverters accept without a second look at the current. On open ground with trackers or fixed tables designed for a wide module, the 66HL5-BDV-Z6 delivers more power per panel placed. The 66HL4M-BDV-F6 record also states a 1500 V maximum system voltage and an operating range of -40 to +70 °C.
Warranty and price
The 66HL4M-BDV-F6 record states 12 years of product warranty and 30 years of performance warranty, and the 66HL5-BDV-Z6 record states 12 years of product warranty and 30 years of performance warranty. Both are priced at USD 0.169 per watt of rated power, so the 720 W costs more per panel and the same per watt.
The models in this comparison
Winner
The 620 W 66HL4M-BDV-F6 for rooftops and for inverters with a tighter input-current limit; the 720 W 66HL5-BDV-Z6 for ground-mount arrays built around its width and current.
Conclusion
The 720 W 66HL5-BDV-Z6 is the higher-output module and slightly the more efficient, and it asks more of everything around it: an inverter input that accepts its current, a structure sized for its width and weight, and handling suited to a heavier panel. The 620 W 66HL4M-BDV-F6 fits the narrower frame that most mounting systems and most string inputs already expect. Both are USD 0.169 per watt of rated power on this store, so neither is the cheaper way to buy a kilowatt.