Split Charge Relay Kit 12V, 4m Cable, IP65 VSR

Split charge relay kit helps keep your starter battery ready by automatically charging and isolating a second battery with a voltage sensitive relay. Designed for 12V dual battery setups, it cuts in at 13.3V and cuts out at 12.8V to prevent unwanted drain when the engine is off. Built for rugged use with IP65 protection, thick battery cable, and a complete accessory pack for faster installs.

• Delivers automatic dual-battery charging and isolation to reduce starter-battery drain when parked


• Includes 4m heavy-duty battery cable plus accessories for a complete split-charge wiring setup


• Protects with IP65 waterproof, dustproof housing built for vibration-prone RV and marine environments


• Fits compact installs in RVs, campers, caravans, 4x4s, trucks, boats, ATVs/UTVs, and workshops


• Requires lead-acid/AGM-style 12V systems; not suitable for lithium batteries

Whether you’re powering a fridge, lights, winch, or accessories, this 12V automatic dual battery isolator kit helps separate your house battery from your starting battery when the engine is off—so you can return to reliable starts. The rugged nylon-plastic housing and stainless M6 power studs are built for real-world use on the road and on the water. Install it once, route the included cable, and get clean, automatic battery management. Grab yours today and upgrade your dual-battery setup.

• Rated voltage: 12V DC


• Cut-in voltage: 13.3V


• Cut-out voltage: 12.8V


• Continuous current: 140A


• Intermittent current: 160A


• Disengage delay: approx. 5–10 seconds


• Delay time: 5 seconds


• Standby current draw: 8mA


• Charging current draw: 280mA


• Operating temperature: -30 to 105°C (-22 to 221°F)


• Material: nylon plastic


• IP rating: IP65


• Power studs: M6 stainless steel


• Cable length: 4 m


• Item dimensions: 2.66 x 2.11 x 2.66 in (6.76 x 5.36 x 6.76 cm)


• Net weight: 4.14 lb (1.88 kg)