Blue Sea 300A Red Mini m-Series On/Off Battery Switch Popular Small to mid-size boats running

Small to mid-size boats running a dedicated house battery

That extra layer of safety consideration can be important when upgrading older wiring or bringing a DIY install closer to accepted marine practices

A green LED indicates active protection

Installation flexibility is a standout feature of the m-Series

these events can instantly destroy an alternator—the APM eliminates that risk

Blue Sea 300A Red Mini m-Series On/Off Battery Switch Popular Small to mid-size boats runningBlue Sea m Series: Compact High Current Battery Isolation Reliable Power Management for Marine and RV Systems The Blue Sea Systems m Series Battery Switch solves the common challenge of installing high amperage isolation in tight spaces. Despite its compact footprint, this switch is engineered to handle significant power loads, making it an ideal choice for switching a single battery to a single load group in boats, caravans, and 4WD setups. Unlike