posted
okay.. i'm thinking about running 2 batts in parallel.
i was thinking for the engine starting battery a diehard silver, and for the other battery (in the trunk) an interstate (are they the same as optima?).. will i have an problems? anyone except [meph] reply to this.
-------------------- ...a work in progress (98 gtp, 2 1.0 fahrad lightning caps, mb quart referenz 5.25" component set, mb quart 3 way 6x9s, RF punch 400.4, RF punch power bd1000, 2 shocker 3 12"s, pioneer deh-p9200, all stinger wires... jeah! when i get the shockers actually shipped to me, i can start the install. now it's time to play the waiting game.)
posted
oh look.. i replied.. go **** yourself angst. you always gotta be a prick about everything. i was just tryin to tell you what i've heard from many MANY ppl.. but thats ok.. continue your quest to prove me wrong.
posted
ive seen peoples batteries competley drain because one was older then the other. Anyways I like my isolator because times Im not playing my stereo I dont want my stock alt attempting to charge two batterys, its to much of a load on the alt.
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Wanta join message me . . . Posts: 1450 | From: chicago, il, usa | Registered: Nov 2000
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and i'm not being a prick i already know what you think, meph
-------------------- ...a work in progress (98 gtp, 2 1.0 fahrad lightning caps, mb quart referenz 5.25" component set, mb quart 3 way 6x9s, RF punch 400.4, RF punch power bd1000, 2 shocker 3 12"s, pioneer deh-p9200, all stinger wires... jeah! when i get the shockers actually shipped to me, i can start the install. now it's time to play the waiting game.)
posted
To help u settle this arguement if u put 2 bats in parrelel they must be of the same type/age and capacity as the older or weaker of the 2 will pack in and die in a short time
-------------------- 8 twelves,4 sixes,2 fours,6 tweeters,12 six by nines,2 waveguides,4 horn tweeters,2 alternators,4 batteries,3 farads, 21" T.V., 6" lcd,1.6" lcd,nicam video,playstation 2,6.8 kw of power 15*.*Db at 53Hz but it's not a spl truck Posts: 54 | From: swindon ENGLAND UK | Registered: Oct 2001
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posted
so would the diehard silver work along w/ the interstate battery? both brand-new?
-------------------- ...a work in progress (98 gtp, 2 1.0 fahrad lightning caps, mb quart referenz 5.25" component set, mb quart 3 way 6x9s, RF punch 400.4, RF punch power bd1000, 2 shocker 3 12"s, pioneer deh-p9200, all stinger wires... jeah! when i get the shockers actually shipped to me, i can start the install. now it's time to play the waiting game.) Posts: 426 | From: bloomington | Registered: Jun 2000
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posted
in a word NO. what happens is all the power goes to the easiest battery to charge,in the weaker battery the plates furr up and after a while it don't work at all
-------------------- 8 twelves,4 sixes,2 fours,6 tweeters,12 six by nines,2 waveguides,4 horn tweeters,2 alternators,4 batteries,3 farads, 21" T.V., 6" lcd,1.6" lcd,nicam video,playstation 2,6.8 kw of power 15*.*Db at 53Hz but it's not a spl truck Posts: 54 | From: swindon ENGLAND UK | Registered: Oct 2001
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posted
i say no its not a good idea. it may work, but chances are it wont. an isolator is the best idea. and be friendly to meph, he knows what he is talking about...
Posts: 1854 | From: freezing in FAIRBANKS ALASKA | Registered: Aug 2000
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posted
Isolator (diode) will cause voltage drop around 1V, it is better and usually cheaper to use relays.
If you will use car everyday and if you will have all bateries the same you won't have much problem with discharging. But if you car will stay longer without charging even same batteries will drain out very quickly.
And everytime you discharge battery to 0, you are killing its performance.
Posts: 1820 | From: Ljubljana, Slovenia | Registered: Jan 2000
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posted
The battery of lower resistance will take a larger percentage of the charge in the unisolated parralel circuit. If you math the batteries, you basically create a situation where the voltage in the car will come to equilibrium at all times or attempt to, with the alternator pumping in energy constantly. The extra battery will actually decrease the resistance of the total charging system circuit (the two will be in parralel) however it will also stimulate more of a leak draw (the alternator will be forced to produce more power all the time).
Isolating the battery, I find, is not a neccesity. This is simply from experience, where I've run up to 6 batteries in parralel w/o an isolator and not had problems. I've also not had equipment failure in these setups, which w/o isolators might cause a problem..
ShadowStar
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Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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posted
okay for starters, i AM being nice to him, he's not pleasant if you don't UNDERSTAND something.
secondly.. he's NEVER done that. so i wanted to ask someone who HAS
-------------------- ...a work in progress (98 gtp, 2 1.0 fahrad lightning caps, mb quart referenz 5.25" component set, mb quart 3 way 6x9s, RF punch 400.4, RF punch power bd1000, 2 shocker 3 12"s, pioneer deh-p9200, all stinger wires... jeah! when i get the shockers actually shipped to me, i can start the install. now it's time to play the waiting game.)
posted
and still, the voice is half for "it shouldn't hurt" and half for "you will blow your CHIT up"
...
that's why i'm asking.
-------------------- ...a work in progress (98 gtp, 2 1.0 fahrad lightning caps, mb quart referenz 5.25" component set, mb quart 3 way 6x9s, RF punch 400.4, RF punch power bd1000, 2 shocker 3 12"s, pioneer deh-p9200, all stinger wires... jeah! when i get the shockers actually shipped to me, i can start the install. now it's time to play the waiting game.)
posted
personally, unless someone can explain it.. don't the batteries (if at the same voltage) have some kind of equalibrium?
like .. what one battery has more of, the other one has less of, but then it's made up for w/ something else, cuz it's 12 volt or something..
i'm a computer science major here, so don't go nuts on me explaining to me.
i can see how more batteries would put more of a strain on your alternator anyways.. i don't *Really* care about that. i'll probably get a h/o one anyways.
-------------------- ...a work in progress (98 gtp, 2 1.0 fahrad lightning caps, mb quart referenz 5.25" component set, mb quart 3 way 6x9s, RF punch 400.4, RF punch power bd1000, 2 shocker 3 12"s, pioneer deh-p9200, all stinger wires... jeah! when i get the shockers actually shipped to me, i can start the install. now it's time to play the waiting game.)
posted
granted i've never hooked up 2batts, but what does this have to do w/ knowing what will happen, or if its a bad idea?
i can say that i KNOW for a FACT that running cerwin vega VEGA subs sealed will cause them to blow up, yet, i have never done this... so therefore i'm not able to answer a related question? interesting.
posted
Also- I have a couple brand new isolators lying around.. Would you like to buy one, just to be on the safe side? I'll give you a decent deal. They're stinger's, fairly large.
ShadowStar
-------------------- You can't build a reputation for what you're GOING to do.. But you can build one for TALKING about it!
It's all about knowledge, love and respect.
Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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quote:Originally posted by G8 SPL: To help u settle this arguement if u put 2 bats in parrelel they must be of the same type/age and capacity as the older or weaker of the 2 will pack in and die in a short time
exactly!
[ 12-01-2001: Message edited by: Mr.Dank ]
Posts: 1259 | From: Fullerton. CA ,USA | Registered: Oct 1999
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posted
Angst- I would email you about this, but you don't have an email availible. I've got some brand new (in package, like 4 of them) isolators, and I think I can do 60$ a piece shipped.. You can get a new battery and an isolator for less than two new batteries, in this case.
ShadowStar
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Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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posted
Why not just get two identical batteries? If they are unisolated and in parrallel, they'll both be starting the car anyways, so there is no "starter" battery and auxillary battery, they both function as one. You might as well either get two of the same (what I would do), or get a high current relay to isolate them if you want one to function as a starting battery and the other to be used for engine off playing time.
Posts: 3958 | From: State College, PA | Registered: Sep 2000
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posted
In my daily driver I ran a 60 amp alternator on 2 batteries with no isolator for over a year with no problems, then I upgraded to a 130 amp alternator so it would charge faster when I had it cranked.
In my SPL car I'm running 5 batteries paralleled with no isolator on a 60 amp alternator, no problems.
posted
ok so i'm thinking that you don't need an isolater. i have a new battery (bout 3 months old) and if i buy an identicle one and put it in the trunk i should be fine.
also will this sort of act as a capaciter? i have a bit on dimming i would like to take care of
quote:Originally posted by G8 SPL: To help u settle this arguement if u put 2 bats in parrelel they must be of the same type/age and capacity as the older or weaker of the 2 will pack in and die in a short time
This is the correct answer....buy the same batts at the same time ans you dont need an iso.
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Posts: 2679 | From: unknown bowels of the underworld | Registered: Aug 2000
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posted
i think running 2 batt in paralle is a great idea just make sure both batt are new
Posts: 42 | From: woodward ok | Registered: Dec 2001
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