Controlling parasitic loads (battery drain) and properly distributing electrical power is crucial to keeping vehicles working. However, this requires balancing the needs of the battery against those of the electrical system.
When it comes to battery management, both Battery Isolators and Automatic Charging Relays (also called ACRs or voltage sensitive relays) both safeguard reserve battery power, so as to prevent breakdowns and protect other vital vehicle or boat functions.
So then, how are these two components different? Is one better than the other? Who should choose one over the other? Here, we examine these questions.