Low Voltage Cut-out Switch

Submitted: Thursday, Aug 21, 2003 at 14:34
ThreadID: 6726 Views:3639 Replies:5 FollowUps:1
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Hello,
We are considering installing low voltage cutout switches, in our vehicles, to prevent the UHF radios from flattening the vehicle batteries when that particular vehicle has not been driven for a couple days. Does anybody have any ideas as to why or why not this would work? Or can someone suggest something that would work better? Thanks for any suggestions.
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Reply By: Member - Oskar(Bris) - Thursday, Aug 21, 2003 at 15:40

Thursday, Aug 21, 2003 at 15:40
Do you have an aux battery set-up in the vehicle? If your aux is set up properly it shouldn't drain the main.
The radio won't draw a lot of current on receive, but does use more on transmit.
I have left mine on for several days at a time without a lot of drop in battery voltage.
Cheers
Oskar
AnswerID: 28609

Follow Up By: Louise Bates - Thursday, Aug 21, 2003 at 18:58

Thursday, Aug 21, 2003 at 18:58
Thanks for the comment, Oskar. We don't have aux batteries installed in the vehicles, which includes tractors. We have had a fair bit of trouble with the voltage dropping too low to start the vehicle after about 36 hours, since the vehicles are sometimes left for a couple days this does cause a problem. Not to mention it's not good for the battery to be flattened too regularly.
Cheers,
Louise
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FollowupID: 19904

Reply By: diamond (bendigo) - Thursday, Aug 21, 2003 at 19:37

Thursday, Aug 21, 2003 at 19:37
i might have missed something but why not wire it up to acc on the car.
will only work with ignition on then.—~‘¬‘¥•s’B
AnswerID: 28636

Reply By: Viola - Thursday, Aug 21, 2003 at 23:38

Thursday, Aug 21, 2003 at 23:38
Louise you can buy a low voltage cut-out from KMart Auto for under $20
The brand is called Projecta
We have them fitted to all the tractors and vehicles
Great no more flat batteries
AnswerID: 28682

Reply By: Member - Colin (ACT region) - Friday, Aug 22, 2003 at 12:50

Friday, Aug 22, 2003 at 12:50
I have one of the units that 'VIOLA' mentioned. $20 from Kmart and I am very happy with it (no more flat battery when I forget to turn frig to gas !) - I plug it in line before the 3 way frig - it cuts out at 11.6 v (I haven't checked these figures !) - I am using a deep cycle battery as the car (Forester) doesn't require a lot of cranking power.
For the price of these units I imagine you could put one in line to any appliance that may be left on for extended periods ?

PS - I have mentioned this 'here' before - I have installed a 12v computer fan to frig heat sink, heavy wire direct from battery to frig, and covered frig with self adhesive foam backed foil (from Clark Rubber - I should ask for a discount from them for the amount of times I have metioned this)
These 3 mods have made a huge diference to the frigs performance !Subaru Forester
size isn't everything !
AnswerID: 28724

Reply By: Brett - Friday, Aug 22, 2003 at 17:12

Friday, Aug 22, 2003 at 17:12
why not just turn off t eradio when you intend to leave the vehicle for a while??
AnswerID: 28763

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