Hi David,
A 100 ma drain will kill a 100 AH battery in about a thousand hours.
Yeah, I know it's a little more complicated than that, but it's a
reasonable approximation. Three batteries, 3,000 hours. So It's not a
very significant drain, but it might be worth tracking it down. I have a
similar drain on my boat, and am suspicious of the ACR relay as well. One
of these days I'll look into it.
Gary
S/V Kaylarah
'90 C&C 37+
East Greenwich, RI, USA
~~~~~~~_/)~~~~~~
On Thu, Aug 17, 2017 at 9:32 AM, David Knecht via CnC-List <
cnc-list@cnc-list.com> wrote:
> I had a suspicion of a power leak in my DC system so did some diagnostics
> yesterday. I have a solar panel running when not on the boat, so it has
> not been a high priority to solve (the batteries are always fully charged
> when I get to the boat), but I wanted to determine if it was real. I took
> all the negative leads off the batteries and then put my ammeter between
> the negative lead and the negative post of the house battery. I have a Blue
> Seas “add a battery” rotary switch which isolates the start battery from
> the house battery. I normally leave this switch on so that the emergency
> bilge pump switch and LED courtesy lights will operate. Those are the only
> things I know of that still work when the panel switches are all off. I
> measured a 100 mA with the rotary switch on and all panel switches off. I
> measured 0 mA with the switch off. I thought it might be the automatic
> bilge pump, but that is a mechanical float switch and disconnecting it had
> no effect. So either I am getting current through the panel with all
> circuit breakers off or this somehow relates to the battery isolation in
> the Blue Seas ACR system. Any thoughts from the geniuses on this list as
> to where to go next diagnosing this? Also, is 100 mA a significant drain?
> Thanks- Dave
>
> Aries
> 1990 C&C 34+
> New London, CT
>
>
>
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