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battery isolators, do I need one??


18 replies to this topic

#1
Davo2378

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Ok so I have a brand new 3 month old Everstart Maxx 75N up front and I'm going to put two XS D1200 in the back.

My question is do I need a battery isolator?

And my other question is do I hook my 1/0 wire to the front battery or to the alternator?

#2
UnderLoK

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Ok so I have a brand new 3 month old Everstart Maxx 75N up front and I'm going to put two XS D1200 in the back.

My question is do I need a battery isolator?

And my other question is do I hook my 1/0 wire to the front battery or to the alternator?


No isolator needed. You run 1/0 from your alt to your front batt and then from that front batt to the rear batts.

Edited by UnderLoK, 28 December 2010 - 11:55 AM.

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#3
Davo2378

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to the rear from the front battery NOT the alternator

#4
Davo2378

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ok I got it, and I already have the big 3 done so I just need to run the 1/0 to the back from the front battery.

But your sure I dont need an isolator

#5
FaTbOy911

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Ok the isolator in my opinio no. About the 0gauge do the big 3 wich is 0 from battery to alternator and upgrading ur negatives to be specific it explains it better in the electrical section and use 0gaugd from the front to the back batteries
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Had an estimate of 6400 for an alpine/clarion setup dealer said it "should" hit around 160db with the custom boxes he was going to make for me..doubtful with so much area to move but, budget is way below that :( any ideas on cheaper brands for that kind of Spl setup? really didnt want to try any Boss or soundstorm, thinking Quantum figure around $150 per speaker "$1800 total" and $1700 to power it, first actual big setup for the van.


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#6
Davo2378

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ok thanks, UnderLoK and FaTbOy911

#7
NRG

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No isolator needed unless you plan on playin music without the engine running for extended periods of time (not recomended)

#8
Audiofanaticz

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Fact: Battery Isolaters are only needed when you plan to play your system of a separate battery with the vehicle off. The Isolater then wont allow the stereo to drain which ever battery is being isolated so the vehicle can still be started.

#9
Davo2378

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Oh ok that helps out alot thanks you guys

#10
FaTbOy911

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Np glad i can help
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Had an estimate of 6400 for an alpine/clarion setup dealer said it "should" hit around 160db with the custom boxes he was going to make for me..doubtful with so much area to move but, budget is way below that :( any ideas on cheaper brands for that kind of Spl setup? really didnt want to try any Boss or soundstorm, thinking Quantum figure around $150 per speaker "$1800 total" and $1700 to power it, first actual big setup for the van.


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#11
dereileak

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I was wondering if I could get a reply from nathan. I have a D3100 in the back and a d3400 in the front. I have read that having different size batteries can shorten the life of them, because when you turn off the car they can try and take current from each other to equalize. I was was just wondering if it would be recommended to isolate them, I have read the post above and from what I can see I do not, but I just want to make sure that this is 100% as i don't want 500 dollar in batteries to go down the drain, lol, within a couple years. I have a 130 stock alternator now, I was looking at a mechman 340 amp one possibly in the future, but I don't think I want this van forever, and it would be hard to sell that alternator afterwards, ha ha

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#12
Nathan @ XSpower

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I do not recommend isolators in any car audio install, unless you are going to be running the system with the vehicle off and just pulling from the battery bank. Even then it is not necessary. Is it going to hurt running one...... No not really. You will drop a little voltage going through the isolator and it will cost some $$$, but if that is ok with you then run one.

As far as your application it will not hurt the batteries at all to not use an isolator. Different sizes of the same batteries doesn't matter and will not hurt the batteries. There are many installs where you can only get a D1200 under the hood, but you can load up the D3100 in the back. It will not hurt the D1200 to do it like that.
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#13
dereileak

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I do not recommend isolators in any car audio install, unless you are going to be running the system with the vehicle off and just pulling from the battery bank. Even then it is not necessary. Is it going to hurt running one...... No not really. You will drop a little voltage going through the isolator and it will cost some $$, but if that is ok with you then run one.

As far as your application it will not hurt the batteries at all to not use an isolator. Different sizes of the same batteries doesn't matter and will not hurt the batteries. There are many installs where you can only get a D1200 under the hood, but you can load up the D3100 in the back. It will not hurt the D1200 to do it like that.


Thanks, just what I was looking for!! :P

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#14
bedmakerjj

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Ok so I have a brand new 3 month old Everstart Maxx 75N up front and I'm going to put two XS D1200 in the back.

My question is do I need a battery isolator?

And my other question is do I hook my 1/0 wire to the front battery or to the alternator?


No isolator needed. You run 1/0 from your alt to your front batt and then from that front batt to the rear batts.


I totally agree with this response Isolators just subtract a well needed battery from the equation

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#15
SQMonte

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Thanks for clearing that up Nathan, I was planning on adding a secondary battery as well but the guy at the battery shop told me I'd need an isolator too. This helps alot.
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#16
Nathan @ XSpower

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One thing you will find is that a lot of people that are in a business that should know about multiple battery installations don't always know as much as they like to make you think. Not saying that isolators should never be used, but in MOST car audio applications they are not needed at all.
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#17
Purplehaze

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Yeah, I wish I would have found this thread sooner. I got one b/c I thought I needed it. They should say on them: Not intended for car audio use. 4x4 or off road use only!
I am in the middle of a build, I just got all my electrical finished, only to see the rear battery not seem to charge. Although, it is charging, just barely. When running, the front battery is at 14.1 and the rear is 12.8 - That shit just aint gettin it!
I was told that adding a voltage regulator could fix this issue, but I aint spending anymore on it, I'm just gonna do away with the isolator.
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If anyone needs one, I have an ALMOST new Stinger 200 amp relay/isolator for sale. I just paid over $60 for it, I'll take $40, plus 10 to ship it! Still have original package, only installed for 24 hrs.

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#18
Chris Scarlett

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Hey everyone. I really need help! I have a yellow top battery in the engine bay of my 2009 Pontiac G6. I have a kinetik HC1200 to put in the trunk. I have 1/0 awg wire running from the front battery back to my truck (straight to my amp right now) but when I first got the kinetik battery I installed it linking the 1/0 awg wire from front battery to back battery with a fuse 8" from each battery. And grounded the kinetik battery to the chassis. But for some reason it was making my yellow top battery swell... I replaced the yellow top 3 times before I have up and took the kinetik out. Y does my yellow top swell and how can I fix it?! Please help!

#19
Soccerballzs

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Hey everyone. I really need help! I have a yellow top battery in the engine bay of my 2009 Pontiac G6. I have a kinetik HC1200 to put in the trunk. I have 1/0 awg wire running from the front battery back to my truck (straight to my amp right now) but when I first got the kinetik battery I installed it linking the 1/0 awg wire from front battery to back battery with a fuse 8" from each battery. And grounded the kinetik battery to the chassis. But for some reason it was making my yellow top battery swell... I replaced the yellow top 3 times before I have up and took the kinetik out. Y does my yellow top swell and how can I fix it?! Please help!

 

 

Have you done the big 3?  Where are you grounded at?  Did you remove any stock wires from your system if you did the big 3.  Are you grounds good?  What voltage is the Y.T resting at?


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