Does a VSR work both ways?

Does a VSR work both ways?

A VSR (voltage sensitive relay) is perfect for dual battery systems. They come in a single sense or a dual sense configuration for bi-directional charging.

Do I need a VSR with a DCDC charger?

Any circuit that includes an auxiliary battery that needs to be charged from an alternator source needs a DCDC charger and not a VSR. The only real exception is vehicles with fixed output alternators that provide a constant output voltage over 14.2V and with a similar or same battery to the cranking battery.

What is the purpose of a VSR?

The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and auxiliary) to be charged simultaneously.

What is a VSR switch?

A Voltage Sensitive Relay (VSR) is a switch that is triggered by the input voltage of an electrical current. VSR applications are popular in dual battery systems with a standard alternator set up.

Does VSR work with smart alternator?

VSRs can also engage and disengage frequently with the large and rapid voltage changes from a smart alternator and so the high current contacts may fail prematurely.

Does a VSR work with a smart alternator?

Tip: Alternatively a VSR (Voltage switch relay) can be used with a smart alternator in a manual mode with a remote switch to control the relay.

Is a VSR an isolator?

Voltage Sensitive Relay/Isolator (a.k.a. “VSR”). This works better, and isn’t very expensive. DC-DC charger.

Can you use a VSR with a lithium battery?

Don’t bother telling me I should just get a lead acid as I understand the differences. I want the light weight and the increased capacity. Hi Geedublya, unfortunately, you can not use a Lithium battery with a VSR isolator, mine or any other brand.

What is dual sense VSR?

Protects starting batteries from becoming flattened by domestic loads. Isolates electronics from harmful electrical surges from starter motors. Ignition protected. Surface or panel mountable. Allows simple charging of dual battery systems.

Where do DCDC chargers go?

With DC-DC charging applications it is recommended that the chargers are installed as close to the auxiliary battery as possible. While there are many installation location options depending on your specific setup, if this is in the engine bay, the best position is in front of the radiator and behind the grill.

Do you need a DC to DC charger for dual battery?

A DCDC charger is integral to your dual battery setup. A quality one will often include a solar regulator too. This allows you to connect a solar panel directly to the charger to continue charging and maintain your battery even whilst the engine is off.