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Part time leisure battery?


 
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Ogri the trog
Newbie


Joined: 27 Nov 2017
Posts: 9
Location: Mid Wales, UK

PostPosted: Wed Jan 17, 2018 20:24    Post subject: Part time leisure battery? Reply with quote

Calling on the collective knowledge of the forum as electrics and I seem to have a mutual distrust of one-another.

Is it possible....

I'd like to occasionally use a leisure battery - I help with communications on mountain endurance events so I drive to remote places, hoist an antenna and sit next to a radio for hours at a time until the event has moved on when I drive a few miles and repeat the exercise.

If I was to fit a "Split charge relay" and have wires leading to a battery in the passenger foot-well so it can charge while I have the engine running but not drain the main battery when the engine is off, and then recharge again when driving between locations.

But what happens when I remove the extra battery, will I have to employ a switch to the split charger or should I completely rethink my power requirements and set up.

Please make any replies easy to understand as the "Dark art of the magic smoke" really has put a curse on my understanding of circuits and amps!

ATB

Pete
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PostPosted: Wed Jan 17, 2018 20:24    Post subject: Google Ads keep this community free to join!


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eithan h
Moderator
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Joined: 11 Dec 2005
Posts: 8195
Location: oxfordish

PostPosted: Thu Jan 18, 2018 20:04    Post subject: Reply with quote

thats pretty much how caravan electrics work so if you remove the battery i.e unhitch the caravan then it will just charge the normal battery as normal, no need for switches
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Steve watson
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Joined: 26 Jan 2019
Posts: 6
Location: West Yorkshire

PostPosted: Sat Jan 26, 2019 11:50    Post subject: Reply with quote

We use a 2nd battery when off grid in the caravan have split charge relay for that purpose but have a removable plug 3 way plug on the end of the wires for the battery so it only plugs in 1 way ,on the battery end 2 battery clamps for the post on the battery you can them blue and red which are snap shut clamps
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DonaldNZ
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Joined: 07 Feb 2019
Posts: 14
Location: New Zealand

PostPosted: Thu Feb 07, 2019 11:38    Post subject: Reply with quote

I'd use a voltage sensitive relay [vsr] by BEP marine

3 wires : one ground , one start battery positive, one leisure battery positive.
switches on around 13.2v and off about 12.7v
simple
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