When two or more batteries are installed in your vehicle (RV, Boat, Limousine, Emergency Vehicle, Automobile, etc.) poweing different systems, a battery isolator allows them to share a common charging source while being independently discharged.

Isolators are commonly used to maintain the starting battery charge while using a second battery to power accessory items (sound systems, refrigeration, emergency lights, computer equipment, etc.) eliminating the fear of having a dead batter when trying to start the engine.

Choosing an Isolator can be a daunting task for the uninitiated. Consider the following when making your selection:

• How many alternators do your have?
• How many amps does your alternator output? 
• How many batteries do you want your system to charge?

Having the answers to those three questions makes choosing the right isolator for your needs a snap.

Common wiring setups, click to view:
1 Alternator 2 Battery	1 Alternator 3 Battery
1 Alternator 4 Battery	2 Alternator 3 Battery

Battery Isolator = your engine will start!

Why do I need a battery Isolator?