12V 140 Amp Smart Dual Battery Isolator Voltage Sensitive Relay (VSR) Pro For Sale - New and Used

We also offer expedited options for additional charge depending on the item, you can review the expedited options at checkout based on your delivery address. 

Your order will be dispatched within 1 working day of receiving payment (Monday-Friday).

If you are not 100% satisfied with your purchase, you can return the product and get a full refund or exchange the product for another one, be it similar or not. 15% Restocking fees apply on all orders returned. 

You can return a product for up to 30 days from the date you purchased it.

Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. If the item is found to be in used condition, refund will be rejected and a case will be opened with . 

12V 140 Amp Smart Dual Battery Isolator Voltage Sensitive Relay(VSR) Pro 

• 12V, 140A, 13.3V cut-in voltage, 12.8V cut-out voltage, Suitable for 12V 4WD, marine, truck, caravan & camping applications
• If you need to isolate your vehicle's starting battery from its auxiliary battery, this SCA dual battery isolator kit is an easy to install option. You can use it with your 4WD, marine vehicle, truck, caravan, or for camping applications. The battery isolator is surge protected, keeping your vehicle and battery safe from unexpected surges.
• When the engine is started, starting and auxiliary batteries are separated allowing only the starting battery to be charged. When the charge voltage reaches 13.3 volts the Voltage Sensitive Relay engages allowing both starting and auxiliary batteries to be charged. This is indicated by the red light in the top LH corner being illuminated.
• When the engine is stopped and the battery voltage falls below 12.8 volts the VSR disengages separating the start and auxiliary batteries, at this point the indicator light will be out and the auxiliary battery continues to power any accessories without risk of draining the starting battery.
• No alternator or ignition connection needed

Installation kit Specifically designed for RV & Boats.
Use for dual battery applications. This automatic relay distributes charging amperage between two batteries. Perfect for “house” and starter battery applications in power-sports applications.
Especially important for vehicles with winches, large stereo systems, cab heaters,light bars and accessories with large electrical demand.
Kit includes:
12v 140amp Smart Battery Isolator with mounting screws.Fully automatic priority charging for main battery.
12V 140A isolator with Cut-In:13.3V, Cut-Out:12.8V
Easy 3 wire connection at the battery.
Uses exisiting wiring in vehicle
No voltage drop.
Compact size 2“ x 2.5” x 2.5“
No heat sink area required.
Water resistant.
Meets (SAEJ1171)certification.
Operation temperature range:
-30 to 105°C (-22°F to 221°F)

Why Choose Us? 

All Star Truck Parts is a Family Owned and Operated Texas-based supplier of 

premium truck and trailer lighting, reflective and wiring over 20 year in the industry and 1,000,000+ drivers served- our mission is simple: keep truckers safe, legal, and rolling. 

We also offer expedited options for additional charge depending on the item, you can review the expedited options at checkout based on your delivery address. 

Your order will be dispatched within 1 working day of receiving payment (Monday-Friday).

If you are not 100% satisfied with your purchase, you can return the product and get a full refund or exchange the product for another one, be it similar or not. 15% Restocking fees apply on all orders returned. 

You can return a product for up to 30 days from the date you purchased it.

Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. If the item is found to be in used condition, refund will be rejected and a case will be opened with .