3rd battery question

Submitted: Tuesday, Jun 20, 2006 at 20:12
ThreadID: 35115 Views:1795 Replies:8 FollowUps:16
This Thread has been Archived
Hello my friends

Don't know about everyone else, but bleep ds its been a busy year.... Just when you get one 4wd sorted, you get another one and start all over again...

Putting a 3rd battery in and just wanted to know if a 3rd battery should be connected to the main or aux battery. The second is connected to the main via a battery management system, and have another dual battery manager for the 3rd, just need to know if there was a preference to which battery to hook it up to?

thanks

Ads
Back Expand Un-Read 0 Moderator

Reply By: Old Scalyback & denny - Tuesday, Jun 20, 2006 at 20:22

Tuesday, Jun 20, 2006 at 20:22
goodday crazie

how are you
with my caravan setup which becomes a 3rd battery while travelling it is connected to the auxillary battery which has a pihranah control on it to isolate from main battery so that it doesnt flatten etc
my preference would be the 2nd battery although with the extra managemnt system i dont think it would matter(just my humble opinion)

steve
AnswerID: 179524

Follow Up By: Member - Crazie (VIC) - Tuesday, Jun 20, 2006 at 22:43

Tuesday, Jun 20, 2006 at 22:43
Hello Steve

ps. Ended up buying a new oven, could get a part anywhere.

cheers for the help, might run the extra isolator anyway

Ads
0
FollowupID: 435774

Reply By: Sand Man (SA) - Tuesday, Jun 20, 2006 at 20:29

Tuesday, Jun 20, 2006 at 20:29
Ads,

Connect it to the auxiliary battery.
This will allow the initial charge to go to the starting battery, then the management system you refer to, will swap over to the auxiliary and any other battery (or circuit) connected to it.

I do the same with my Rig. I have an auxiliary AGM battery connected via a Piranha DBS controller, then another circuit from the auxilary battery terminals through a separate fuse and controller to an anderson connector in the rear of the Jack.
To this I connect the Thumper portable battery system to charge along with the auxiliary battery whilst travelling.

Bill


I'm diagonally parked in a parallel Universe!

Member
My Profile  My Blog  My Position  Send Message

AnswerID: 179528

Follow Up By: Mbr - Taz & Milka-Queanbeyan - Tuesday, Jun 20, 2006 at 21:31

Tuesday, Jun 20, 2006 at 21:31
Hi Sand Man,

I am assuming that your cranking battery is not an AGM and I don't believe the Thumper is an AGM ( correct me if I am wrong ).

I read somewhere that it wasn't good to use AGM and non AGM on the same system especially in parallel.

From your description it would appear that you do use dissimilar batteries on one system. Can I also assume that you haven't encountered any problems with this setup ?

I am considering adding a standard battery as an aux to my cranking calcium to assist in winching operations and running 2 fridges on the road. I also want to put a 100ah AGM in the trailer and connect it in parallel with the aux via an anderson plug. What do you think ?

Cheers.....Taz
0
FollowupID: 435741

Follow Up By: Sand Man (SA) - Tuesday, Jun 20, 2006 at 22:15

Tuesday, Jun 20, 2006 at 22:15
Hi Taz,

Yes, I have a mixture of batteries. The starting battery is an Exide Extreme (wet cell) while both the auxiliary battery (Exide Orbital) and the Thumper are both AGM batteries.

No problem with mixing types, at least not with the Piranha DBS150 smart controller.

You may have also read that it is not recommended that you put an AGM battery in the engine bay. Well that's where mine is and I haven't experienced a problem.

As far as your other query, I don't have a winch to worry about but I am of the understanding that a winch should be run from the starting battery and only when the engine is running, whilst other equipment such as fridges are best run from a deep cycle auxiliary battery, preferably an AGM type to provide quicker and more total recharge capability.
Bill


I'm diagonally parked in a parallel Universe!

Member
My Profile  My Blog  My Position  Send Message

0
FollowupID: 435759

Follow Up By: Member - Crazie (VIC) - Tuesday, Jun 20, 2006 at 22:44

Tuesday, Jun 20, 2006 at 22:44
hello Sandman

my 2nd and 3rd are deep cycle gel cyle/cranking batteries. I might put the extra management in as it will allow the 2nd battery to charge first before hooking up the 3rd.

thank mate

Ads
0
FollowupID: 435776

Reply By: allblack55 - Tuesday, Jun 20, 2006 at 20:36

Tuesday, Jun 20, 2006 at 20:36
I have 3 batteries under the bonnet of a TD prado, each seperated by a management system, the third (and smallest battery) is the last to be charged, ie the main aux, is always charged first after the engine start battery reaches the trip point of the associated isolation/management unit. The manner in which you arrange your setup should depend on equipment parameters (useage, drain etc.) and recharge capabilities. Give it considerable thought.

Regards,

Leigh.
AnswerID: 179532

Follow Up By: Member - Crazie (VIC) - Tuesday, Jun 20, 2006 at 22:46

Tuesday, Jun 20, 2006 at 22:46
Hi Leigh

Thanks mate, I will look at what accessories i will hook up to which battery, I hadn't thought of that. Not much uses charging the second battery 2nd if the 3rd is draining more than the 2nd hahaha mouthful

cheers

ads
0
FollowupID: 435778

Reply By: Alloy c/t - Tuesday, Jun 20, 2006 at 20:47

Tuesday, Jun 20, 2006 at 20:47
Crazie , am presently running a 5 batt system ,soon to be a 6 batt ,, currently start batt is a 80amp Fullriver AGM HGL and aux is same thru redarc copy ,[used to use a rotronics in previous vehicle ] ,3x 80amp Fullriver AGM HGL in camper trailer via anderson to under bonnet aux,... newer 6 batt system will simply add another 80 amp Fullriver AGM HGL under the bonnet for those times when we go away minus the c/t but take both our fridges [80lt Waeco ,15lt Engle] , new batt becomes aux 2 wired direct from current aux 1 , see no need for another batt controller.
AnswerID: 179533

Follow Up By: Member - Crazie (VIC) - Tuesday, Jun 20, 2006 at 22:48

Tuesday, Jun 20, 2006 at 22:48
thats some battery power.. just wonderif not having the second controller in will put too much strain on the 2nd bat.

thanks

Adam
0
FollowupID: 435779

Follow Up By: Muzzgit (WA) - Tuesday, Jun 20, 2006 at 23:46

Tuesday, Jun 20, 2006 at 23:46
Crazie, I'm no auto leccy but my way of thinking is this......if both aux batteries are hooked together and used for a fridge etc, you will have almost double the running time [effectively acting like one big battery] and of course double the re-charge time, which could be a problem if you don't have the means to give them a full charge ie; being on the road every day, or having a battery charger.

On the other hand, using a third isolator could reduce your chances of re-charging the 3rd battery by quite a bit, assuming the isolator will only click in when the 2nd battery is over 12.5v [or thereabouts] which might take a few hours depending on how much its discharged !!!

Cheers,

Muzz
0
FollowupID: 435791

Reply By: Trevor M (SA) - Tuesday, Jun 20, 2006 at 21:19

Tuesday, Jun 20, 2006 at 21:19
this seems to be becoming a competition as to who has the most batteries??? LOL

(isn't it funny how when you are having a go at someone we think if you put "LOL" on the end it will be ok???? .....not that I was having a go of course...LOL)

Trev
AnswerID: 179537

Follow Up By: Member - Crazie (VIC) - Tuesday, Jun 20, 2006 at 22:50

Tuesday, Jun 20, 2006 at 22:50
Hi Trev

Almost as bad as what lift, tyres and fridge are you running....lol hahaha

dont care if people have a go...i will track them down hahaha

cheers mate

Ads

0
FollowupID: 435780

Reply By: Derek from Affordable Batteries & Radiators - Tuesday, Jun 20, 2006 at 21:56

Tuesday, Jun 20, 2006 at 21:56
Hi Crazie,

You have a lot of answers here but I would recommend you use the 3rd isolator on the main battery. Voltage drop on the 2nd auxiliary could cause the isolator to shunt and you won't get a good charge.

Let me know more details on type of vehicle, position of batteries and cable sizes and I will advise you.

Contact me on djbester@bigpond.net.au or click my links.

Regards Derek.
AnswerID: 179546

Follow Up By: Member - Crazie (VIC) - Tuesday, Jun 20, 2006 at 22:54

Tuesday, Jun 20, 2006 at 22:54
Hi Derek

thanks mate, i have sent an email. sorry forgot a few things. Cable size is 12mm core/wire size, 2 under the bonnet, 1 in the rear storage system. main battery is wet cell, 2nd and 3rd are deep cycle gels. both isolators/chargers do not kick in until the battery it is charging from reaches 13.1volt and then a 5 min delay. think the rest is in the the email

thank you

Adam
0
FollowupID: 435781

Follow Up By: Truckster (Vic) - Wednesday, Jun 21, 2006 at 00:01

Wednesday, Jun 21, 2006 at 00:01
you can set mine up in the GU too when ya finished..
0
FollowupID: 435797

Follow Up By: Muzzgit (WA) - Wednesday, Jun 21, 2006 at 22:01

Wednesday, Jun 21, 2006 at 22:01
LOL Truckster.

I think the word needed here is, PLEASE !!!
0
FollowupID: 435955

Follow Up By: Truckster (Vic) - Thursday, Jun 22, 2006 at 00:02

Thursday, Jun 22, 2006 at 00:02
I helped him pick out his bike... ;)

But then I probably only owe him 10 things now :(
0
FollowupID: 435971

Reply By: Peter McG (Member, Melbourne) - Tuesday, Jun 20, 2006 at 22:01

Tuesday, Jun 20, 2006 at 22:01
Hi Adam,

If the purpose of the battery management system is to isolate the draw from the aux system from the cranking battery then I don't see a need to introduce a second isolator. You might just regard the two aux batteries as one big battery and wire in parallel. In the Patrol I use identical Delkor batteries as main and aux and then have a fullriver DC AGM in the Ultimate. This charges from the aux battery. Works well.

Cheers

Peter
Peter
VKS Mobile 1906

Member
My Profile  My Blog  My Position  Send Message

AnswerID: 179548

Follow Up By: Member - Crazie (VIC) - Tuesday, Jun 20, 2006 at 22:56

Tuesday, Jun 20, 2006 at 22:56
Hi Peter

Thanks mate

dual purpose for the management, 1 to manage the charge and then 2nd to isolate.

Hope you are well and things that have been fixed are causing no worries

Ads
0
FollowupID: 435783

Follow Up By: Peter McG (Member, Melbourne) - Tuesday, Jun 20, 2006 at 23:56

Tuesday, Jun 20, 2006 at 23:56
Thanks Adam, That thing on the front is all fine but did you hear about the right rear wheel problem - like coming adrift on the west gate. Saga not over yet. changing to steel wheels and new tyres before the Cape trip next month.

Peter

Peter
VKS Mobile 1906

Member
My Profile  My Blog  My Position  Send Message

0
FollowupID: 435795

Follow Up By: Member - 'Lucy' - Thursday, Jun 22, 2006 at 00:07

Thursday, Jun 22, 2006 at 00:07
I raise the (6) battery dude to seven and will take a look at yours Crazie. (ROFLMAO)

You have all lost the plot except good old - Peter McG (Member, Melbourne) - who is spot on.

Thats how you will see my third battery wired next time you see my standard Troopy.
0
FollowupID: 435973

Reply By: Member - JohnR (Vic)&Moses - Tuesday, Jun 20, 2006 at 22:38

Tuesday, Jun 20, 2006 at 22:38
Mate, just got mine running parallel to the second one as I usually draw on both for an overnight or the winch. I reckon it depends a bit on the reason you want to have it. I have pretty heavy cable between the two and that could carry the winch power ok too. Not really legit wire for it as it carried 240v and plenty of amps in it's former life.
Cheers,
Who?
John

Member
My Profile  My Position  Send Message

AnswerID: 179569

Follow Up By: Member - Crazie (VIC) - Tuesday, Jun 20, 2006 at 22:56

Tuesday, Jun 20, 2006 at 22:56
want it cause i can hahaha
0
FollowupID: 435784

Sponsored Links

Popular Products (13)