Extra Battery Cable 8AWG Portable Power Station Expansion Adapter Cable

The Humoony 50A PPS extension cable is 59 inches long and supports high-capacity bidirectional power transmission, enabling 50A fast charging and bidirectional power supply. Designed for durability and performance, this cable features thick 8AWG conductors and a high-temperature-resistant ABS casing, which can withstand temperatures up to 100°C and ensure stable operation under repeated use and harsh conditions. Its sturdy structure can withstand daily wear and tear while maintaining good heat conduction and electrical performanceNo adapter required, plug-and-play, perfect for outdoor adventures, emergency backup or professional on-site operations.Compatible models:Delta 2Delta 2 MaxDelta 3Delta 3 PlusDelta 3 MaxDelta 3 Max PlusNOT compatible with:Delta Pro SeriesDelta Pro Ultra SeriesTRAIL DC SeriesRiver Series (River 2, River Pro, River Max)Any PPS without a dedicated XT150 expansion battery portNon-48V battery systems (12V / 24V — voltage mismatch)Under the hood, the Delta 2 runs a 48V LiFePO4 internal battery bank. That detail matters, because the expansion port is designed to work with another 48V source. So your external battery must be a 48V LiFePO4 battery of the same voltage as the power station, it cannot be a 12V battery or any other voltage system. The process is passive on the battery side: the external battery doesn't need its own inverter or communication protocol. It simply needs to supply the right voltage through the right connector. Safety and Usage NotesAlways verify polarity with a multimeter before connecting. Reversed polarity is the leading cause of equipment damage in high-current setupsMatch SOC before connecting: ideally both units at 100%. Never connect a full battery to a near-empty station.If the link pauses, do not force it: allow both devices to equalize charge, then reconnect.Follow your product manuals: when in doubt, the official manual takes precedence.Use only with WattCycle 48V LiFePO4 batteries and confirmed compatible PPS modelsDo not modify either connector cable.When the system voltages are unequal, the portable power station will pause the connection and automatically enter a protection mode.Scenario A: SOC levels are closely matchedWhen the portable power station and the 48V external battery are at similar charge levelsThe current is shared evenly between the two devices during charging and discharging. The current passing through the cable does not exceed 30A, which is well within the cable's rated capacity of 50A. This is the cleanest operating condition, and it presents no risk of any kindScenario B: Large SOC gap, with the station fully depletedWhen the portable power station is completely drained while the 48V external battery is above 70% charge, the voltage differential reaches approximately 2V. The portable power station detects the signal and enters protective mode immediately. At the moment of connection, zero current flows through the expansion cableOnce the station receives a small amount of charge and reaches around 5% SOC, the voltage differential narrows to approximately 1V. At that point, connecting the cable allows current to flow. There is a brief period of higher current draw, between 30A and 40A, during the first 30 seconds as the system begins to balance. After about one minute, the current drops to around 20A and then stabilizes. Throughout this entire process, the current stays within safe limits and the cable operates well below its 50A rating. No safety hazard occurs at any stageScenario C: Station fully charged, battery fully depletedWhen the portable power station is at full charge while the 48V external battery is depleted, the station uses the cable to charge the battery directly. The current does not exceed 20A, which again is a comfortable load for a cable rated to 50A. This scenario is also safe throughout

• Bidirectional high-efficiency charging: Designed for high-speed performance, this extension cord supports up to 50A of bidirectional current, allowing both charging and discharging between your portable power station and an external battery pack—making it an ideal choice for RV backup power, off-grid systems, and home energy storage
• Wide Compatibility: Designed specifically for the Delta 2, Delta 2 Max, Delta 3, Delta 3 Plus, Delta 3 Max, Delta 3 Max Plus, as well as the WAVE 3 interface. Also compatible with 48V series batteries such as the WattCycle 48V 100Ah V2 rack-mounted intelligent battery
• High-quality Materials: This extension cable utilizes heavy-duty 8AWG wiring designed to minimize voltage drop and improve power transmission efficiency. This robust ABS housing withstands temperatures up to 100°C(212°F), ensuring excellent thermal and electrical stability, withstands repeated plugging/unplugging, and maintains safe performance under high loads
• Safe Electrical Connection: The external battery pack and the portable power station each manage their own state of charge (SOC). If a large voltage difference is detected during the connection process, the internal protection of the power station will automatically pauses the link until voltages synchronize
• Built for Safety, Backed by Trust: Humoony is responsible for the quality and safety of the product. This cable has professional value and offers a 1-year warranty service, allowing you to use the energy storage device with greater peace of mind and receive reliable support