Dual battery isolator 12V 300A keeps your starting battery protected while efficiently charging an auxiliary battery for RV, truck, boat, or off-grid setups. A voltage sensitive relay with LCD screen shows both battery voltages in real time and supports lithium and lead-acid systems. Switch between automatic VSR operation and manual mode to manage power with confidence in demanding outdoor conditions.

Built for real-world installs, this smart battery isolator adds overvoltage and undervoltage protection in a compact, rugged housing designed to handle vibration, dust, and rough use. Use it as a split charge isolator for vehicle or marine electrical systems where stable power matters—camping gear, winches, lighting, fridges, and accessories. If you want cleaner charging control and clearer voltage visibility without guessing, grab yours today.