Part time Dual Battery - Portable & Redarc Query

Submitted: Sunday, Feb 04, 2007 at 14:36
ThreadID: 41963 Views:3490 Replies:7 FollowUps:9
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Hey Guys n Gals,

Have read all the Dual Battery threads, have sussed out what I want - now down to one not so minor detail.

I have a Jeep Grand Cherokke WG (2000) with no room under the bonnet for a second battery for fridge etc. No biggie - will knock up a plywood box to fit the 120 A/h AGM - am aware of all the cable requirements etc.

Tricky part is this, my current cig lighters (front & in rear cargo) operate when ignition is off - suggests straight to main battery. Which is good for charging mobile phones etc. Now if I were to have a Redarc installed for the second battery, and bearing in mind that the second battery wil only be a part time thing, if the second battery is removed, I assume that the Redarc will look for the starting battery volts when switching off the ignition and then switch over to a battery that is not there?

Am sure that this is the case, so how best am I to wire things up, so that I can have the ease of the use of a Redarc (or similar) when I need it, and also have things back as they were without the second battery. I prefer not to use a manual switch as the primary source of control - maybe manually switch over to a solenoid one day and then switch back a few weeks later when solenoid not wanted anymore, type of thing.

May not have done a flash job of explaining, but essentially the fridge wont always be in the car - want the Explorer DC75 at 850x520x520 and couple that with the second battery in the rear - would rather have the room than carry around all the time - even just the second battery is not a small thing hence why I dont want it permanent - I work away so would rather chuck my gear in the rear cargo as opposed to have stuff on rear seat.

Any thoughts and help is greatly appreciated.

Cheers All

Graeme
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