Engel battery pack and in-car charging system

Submitted: Thursday, Feb 28, 2008 at 00:31
ThreadID: 54996 Views:3236 Replies:5 FollowUps:3
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Boy, the second battery question is a conundrum.

I have no room under the bonnet for second battery. I intend to run large cables (20 to 25mm2 both + & -) through to the rear compartment to re-charge the second battery (a sealed, no fume battery - prefer AGM??).
Here is my problem;
Where do I put the switching relay (to separate the cranking and second battery). I've found a supplier of 56 Amp Hour Engel Battery Packs for a reasonable price. He also sells the in-car 12v charging system and 240v system and I'm thinking a package-deal discount, but the 12v charge system looks like it is a switching relay and has the special Engel connections for connections to the engel battery pack? I'm thinking this needs to be as close to the second battery as possible. Is this correct? If so, it'll mean the switch relay will be in the rear as well???????
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Reply By: warfer69 - Thursday, Feb 28, 2008 at 00:48

Thursday, Feb 28, 2008 at 00:48
Hiya Perthberts

Just a quick thought have you looked at every option for under your bonnet,I was told the same and advised to use the thumper battery out the back (tub).. Went to TJM and they can shift this and that and get an 80ah battery under their,yet ARB said no...

And thats even after i had the ARB tyre compressor installed..



Cheers
AnswerID: 289753

Follow Up By: perthburts - Thursday, Feb 28, 2008 at 01:11

Thursday, Feb 28, 2008 at 01:11
Hmmm, 4.8 TI GU. It's full of bits.
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FollowupID: 555096

Follow Up By: Member - Tony W (VIC) - Thursday, Feb 28, 2008 at 06:49

Thursday, Feb 28, 2008 at 06:49
Got to agree with warfer69, it is amaizing how they can sometimes find sapce where you think there is none.

Pirhana often do some good battery tray installs. Give em a call.

I think a 4.8GU will have tons of space. Also try http://patrol4x4.com/forum/


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FollowupID: 555100

Reply By: Derek from Affordable Batteries & Radiators - Thursday, Feb 28, 2008 at 11:07

Thursday, Feb 28, 2008 at 11:07
What fridge do you run ? How long do you plan to run the fridge between stops.

You may need a bigger pack 120 a/h or so.

Regards

Derek.
AnswerID: 289783

Reply By: Mainey (wa) - Thursday, Feb 28, 2008 at 11:28

Thursday, Feb 28, 2008 at 11:28
perthburts,
you ask-> ""Where do I put the switching relay (to separate the cranking and second battery)""

as near to the CRANKING battery as possible !!

IMO 56ah battery is only a toy if it's to be used for any period of time with a fridge, get a serious AGM battery, as large as you can realistically afford (100ah PLUS)
Remember you should NEVER fully discharge any battery !!

Mainey . . .
AnswerID: 289787

Reply By: Member - Tom V (WA) - Thursday, Feb 28, 2008 at 17:19

Thursday, Feb 28, 2008 at 17:19
Hi Perthburts
I did the same on my D4D Prado. I purchased a battery box from derek @ ABR. this box came with the necessary switch and a length of 6mm cable with anderson plug for the battery box.

purchased battery @ ARB & had local auto electrician install cable from front battery to back of prado. this now charges the battery & can run my waeco for up to 36hrs approx, without needing recharge. I wanted a portable system so went this way.
Cheers Tom
AnswerID: 289850

Follow Up By: CJ - Thursday, Feb 28, 2008 at 20:23

Thursday, Feb 28, 2008 at 20:23
Tom,

How long does it take to recharge from your car after you ran the fridge for that long?

Thanks, CJ
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FollowupID: 555198

Reply By: perthburts - Friday, Feb 29, 2008 at 00:52

Friday, Feb 29, 2008 at 00:52
I'll check with Patrol web thanks warfer69 &Tony W.
Thanks Derek, Mainey & Tom. We'll be running an old 30 year old 13ltr Engel and lights in Jayco Hawk. I'd like to set something up now for a future larger 80ltr fridge. A portable system has it's advantages, but limitations too. I've seen thread upon thread on batteries, charging, cable sizes etc. Info overload - I just want a good reliable, safe system that's easy to charge at a sensible price. I'm a fitter/ machinist and do every thing my self, but 12v stuff is a whole different language,
AnswerID: 289944

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