using aux battery for alarm backup

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dennisr

Member - Posts: 2

Joined: August 04, 2011

Posted: August 04, 2011 at 9:57 PM / IP Logged

My truck has dual batteries, the aux is only used to run an invertor and I want to use that as a backup for my alarm. I have an isolator controled by a switch to seperate the batteries. Whats the best way to wire this up to still keep them seperate so one doesnt drain the other? If I place a diode in the alarm power wires from each battery would that be enough? I dont really know what size diode to use.

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oldspark

Gold - Posts: 4,913

Joined: November 03, 2008

Location: Australia

Posted: August 04, 2011 at 10:13 PM / IP Logged

You need to transfer the alarm (power) to the aux battery.

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dennisr

Member - Posts: 2

Joined: August 04, 2011

Posted: August 05, 2011 at 1:52 PM / IP Logged

That might be a good idea. Definetly easier to do.

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using aux battery for alarm backup

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