Marinco 721 Heavy-Duty Battery Selector Switch 350A Marine

The Marinco 721 is a heavy-duty battery selector switch designed for marine electrical systems. This robust switch provides a simple and economical solution for managing two separate battery banks on boats, RVs, and other marine applications.

Key Features:

• Rated at 350 amps continuous current and 1500 amps cranking capacity
• Suitable for systems up to 48 volts
• Features removable plates and back cover for easy installation and servicing
• Can be locked in the "off" position with a long shank padlock through the knob for added security
• Housed in the same durable module as the popular 720 model
• Conforms to industry standard mounting footprint (Guest, Perko, Blue Sea compatible)

This rotary battery selector switch offers multiple positions to control battery usage and charging, allowing you to switch between Battery 1, Battery 2, Both batteries, or Off. The MC10 contact configuration with screw terminals ensures secure electrical connections. Note that selector switches will not separate electronics from harmful engine starting spikes; isolated battery systems are recommended for sensitive electronics protection.