eMarine's Brand of the Month is Victron Energy!

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

Battery 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 battery when trying to start the engine.

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

  • How many alternators do you 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.

If your concerned about your batteries becoming overly discharged, we rcommend consider installing a Battery Protector.


What Does a Battery Isolator Do?

Battery Isolators

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?