Having a Smart Dual Battery Isolator in your kit is the best option you can make. It is ideal for dual battery applications because it allows both batteries to charge simultaneously and isolates them to make sure the starting battery is always fully charged and ready to use at any time.

What's great about a smart dual battery isolator is that it can automatically engage or disengage the circuit at pre-set voltages by monitoring the input voltage generated, which prevents the chance of depleting the primary starting battery. When a charging source is absent, it automatically manages the charging process to the batteries while continuing to offer isolation.

Key Features:

• Surge protected
• Has an LED indicator to notify users when the item is engaged
• Nylon injection-molded enclosure is weatherproof
• The feature includes long-lasting silver-tripped contacts
• Auto-battery isolation method that is technologically advanced

Product Specifications:

• SKU: 3-422790-1
• Weight: 0.45 LBS
• Material: Machined Brass / Injection Molded Nylon
• Brand: Sea-Dog Line
• Cut-in voltage: 13.3 VDC
• Cut-out voltage: 12.8 VDC

(Installs with two #8 RH fasteners (included). 12 VDC. 140A. IP65 rating)

Machined Brass/Injection Molded Nylon

This Smart Dual Battery Isolator is ideal for dual battery applications. Allows two batteries to automatically charge at the same time and then isolates the batteries, ensuring the starting battery is always charged and ready for use. Automatically engages or disengages the circuit at pre-set voltages by sensing the input voltage generated, eliminating the possibility of discharging the primary starting battery. Cut-in voltage: 13.3 VDC. Cut-out voltage: 12.8 VDC. Surge protected. Features an LED indicator to alert the user when the unit is engaged. Constructed of machined brass with a weatherproof injection molded nylon housing and durable silver tipped contacts. Installs with two #8 RH fasteners (included). 12 VDC. 140A. IP65 rating.

This product replaces:

422790-1, 422790, 3-422790