Rotronics daul battery

Submitted: Sunday, Aug 11, 2013 at 13:55
ThreadID: 103718 Views:1455 Replies:3 FollowUps:2
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Hi,
I have a rotronics 3ST12CFV in a prado I bought recently.
I was wandering if you can change to the Aux battery if your main one goes flat so I can start the car. As I have no idea if it is possibe or not.
At the moment I use jumper leads from one to the other to start it.
All help is appreciated
Cheers, Dan
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Reply By: Member - TheFox3305 - Sunday, Aug 11, 2013 at 16:29

Sunday, Aug 11, 2013 at 16:29
you're on to it. I used to carry a small 10mm2 link cable with 2 lugs, a couple of m6 nuts and a 10mm spanner. there is no switch/easy way to do it.
AnswerID: 516225

Reply By: Member - LeighW - Sunday, Aug 11, 2013 at 16:29

Sunday, Aug 11, 2013 at 16:29
Assuming they haven't changed their functionality no you can't bridge the batteries for starting.

You can select to charge aux, and top up main, or charge main and aux,
or main only.

You could install a separate solenoid to bridge the batteries or a battery
coupling switch.

Being practical, with the Rotronics installed you should never flatten the main,
if you should by accident then just jump with cable.

Cheers
Leigh

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AnswerID: 516226

Reply By: Dan W1 - Sunday, Aug 11, 2013 at 16:46

Sunday, Aug 11, 2013 at 16:46
I understand that, But I have electric rust control on the vehicle and I only use it every fortnight. So the only way is a jumper lead or a solinod switch.
How would you wire one in.
Is it possible for you to send a wiring diagram
Dan
AnswerID: 516227

Follow Up By: Geoff (Newcastle, NSW) - Sunday, Aug 11, 2013 at 20:07

Sunday, Aug 11, 2013 at 20:07
In that case why not buy a 7 Amp CTek battery charger and leave it permanently connected when the vehicle is idle.

I haven't driven my Troopy for about 3 weeks but I do know it will start first kick when I next jump in it and the battery won't be dstroyed by continuously running it flat.

I usea10 Amp CTek on mine but a 7 Amp will do just as good a job.

Geoff,
Landcruiser HDJ78,
Grey hair is hereditary, you get it from children. Baldness is caused by watching the Wallabies.

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Follow Up By: Member - LeighW - Sunday, Aug 11, 2013 at 21:12

Sunday, Aug 11, 2013 at 21:12
Agree with Geoff, if you keep letting your battery run down and leave it in a discharged state it is only going to ruin the battery.

Solenoid option would be expensive as you need a solenoid that can switch around at least 400A to crank the motor.

Cheers
Leigh

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