Battery Isolator - Parasitic Current

[otrfun]

Does the typical battery isolator subject the vehicle battery to any parasitic current when they're in the "cut-out" mode (secondary battery disconnected)?

[otrfun]

MEXICOWANDERER wrote:
ISOLATOR covers a large territory. Which type do you have??

Haven’t purchased one yet. This isolator (and many rebranded versions of it) appear to be very popular on Amazon.

[wa8yxm]

There are two basic types of battery isolators and on one of them two control systems
Diode isolators have no control system bit it is possible they may present a tiny "leakage" current.. I doubt you'd be able to measure it it's that small.

Relay isolators when isolated it's 100 percent no leakage but the control system may have a voltage sensor that "draws again a very tiny amount a very very tiny amount.

[pianotuna]

Some folks use a Trik-l-Start to maintain the Chassis battery.

[pianotuna]

otrfun wrote:
Does the typical battery isolator subject the vehicle battery to any parasitic current when they're in the "cut-out" mode (secondary battery disconnected)?

If the isolator is a relay, or solenoid, then no.

[MEXICOWANDERER]

ISOLATOR covers a large territory. Which type do you have??

[BFL13]

With the ignition off, the isolator keeps all house loads from the starting battery. BUT the starting battery still has its own parasitic loads on it from the engine computer , dash clock etc.

Some put a small charger on the starting battery to maintain it while the RV is parked and isolator is "open", while the house batts are maintained by something else.