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V70 rear 12 V socket / starter battery draining protectionViews : 396 Replies : 4Users Viewing This Thread : |
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Jul 28th, 2020, 11:05 | #1 |
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V70 rear 12 V socket / starter battery draining protection
Greetings,
My 2002 V70 has a 12 V power socket at the rear. Questions: 1. Does said socket have some 'semi-smart' feature that prevents a device connected to it from draining the starter battery when the engine isn't running, e.g. on a camping holiday? 2. If the answer to Q1 is No, how could one go about implementing some kind of automatic voltage monitoring / device shutdown mechanism? Thank you. |
Jul 28th, 2020, 12:18 | #2 |
Grumpy Old Git
Last Online: Apr 19th, 2024 09:16
Join Date: Dec 2004
Location: South Yorkshire
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I don't know about your specific vehicle, however the boot power outlets can either be permanently live or ignition switched (most front/cabin power outlets are ignition switched).
If the boot one is permanently live, then it is highly unlikely to have this kind of auto-disconnect feature I'm afraid (I'm not aware of any cars having this except possibly a Tesla) - you'll have to look at the aftermarket solutions for that. Look into camping fridge/freezer wiring - there are some kits that you can use that will disconnect the supply when the voltage drops below x volts. They tend to be quite compact and can be wired in behind the boot trim panel. The other option will be to use a VSR - voltage sensing relay. These make/break the supply according to a set voltage. They tend to be bulkier, so may need to be mounted in the engine bay, with a fresh (fused) power feed run to the power socket in the boot. HTH
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Jul 28th, 2020, 20:47 | #3 |
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You could rewire the rear one so that it takes its live from a switched live! There's a fuse box on the near side in the boot and one of those should be a switched live.
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Aug 5th, 2020, 09:31 | #4 | |
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Quote:
For the time being I think I'll try and apply 'common sense' before considering a more technical solution along the lines you suggested |
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Aug 5th, 2020, 09:32 | #5 |
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Last Online: Aug 5th, 2020 09:32
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Thanks for your helpful reply. The thing is, I actually find it useful that the socket is permanently live.
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