Battery Isolator - Parasitic Current

BFL13 wrote:

otrfun wrote:

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.

Looks like that thing is not really an isolator and it could allow some draw from the starting battery, but if the starting battery voltage falls below 12.8 it does get isolated? Not clear. I don't really understand what that thing is good for, but more coffee might help.

That's my concern. Right now we only get about 4-5 weeks before the battery voltage on our '16 Ram Cummins drops down to 12.2v (truck is not a daily driver). Even 50-100ma of parasitic from a battery isolator could potentially drop our max time between engine starts to 2-3 weeks.