Here you can learn about Automatic Charging Relays, Battery Isolators, and Zero Drop Isolators. ... read more
Automatic Charging Relays allow two banks on a vessel's alternator to be charged simultaneously from one unit. Doing so, keeps the batteries isolated when not charging. This benefit is useful in the case of one battery failing and having another battery as an emergency back-up. There are a few main styles to choose between:
- Automatic Charging Relays: Combined voltage and relays that reach over 13V DC will charge two batteries at the same time. When the charge is inactive or overloaded, the voltage will drop to around 12.75V DC. The relay will open, and the two batteries will be isolated. An Automatic Charging Relay allows the current to pass easily from one battery to the next.
- Battery Isolators: Currents will flow more swiftly to the battery. However, because of the presence of diodes, the voltage is more likely to decrease, which consumes more energy and does not charge batteries quite as quickly. Also, the heat levels will most likely rise, and the currents will split.
- Zero Drop Isolators: These isolators are useful in addressing the problem of voltage- dropping. These will cost more than the other options due to limited market acceptance.
Applying one of these three concepts to your alternator will bring about different advantages and will inevitably improve the lifespan and quality of your batteries. We recommend, for the sake of safety and accuracy, consulting with a technician or a mechanic in choosing the appropriate method before making any purchases. read less