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Thread: troubleshooting with 2 batteries and an isolator

  1. #1
    Newbie
    Join Date
    Feb 2007
    Location
    new york
    Posts
    9

    Angry troubleshooting with 2 batteries and an isolator

    hello, i have 4 amplifiers in my car. one autotek 2000mm running 1500watts rms to a kicker l7,one lanzar4 channel 250 rms per chanel for my vocals which are connected 2 to 10inch subs for vocal. one lanzar 1000rms for another sub and aone fosgate 5002 just for my tweeters. i have an optima red top in the front brand new and a brand new yellow top in the back along with an 120 amp isolator . i also have 3 tv's . 2 in the visors and one stand alone. i have problems with the car starting after a few days of no use. if i didnt use the car within 2-4 days the battery would die, so i replaced them both to be safe. but now after a day or 2 i get a real delayed start like it just turns over and just makes it. i was wonderign if maybe my isolator is not strong enough or maybe i need a third battery . i had the car checked for a drain but there was none.and the batteries are good as well. i was wondering if someone could help me out. i was wondering since the isolator seperates the batteries why my battery would have a low charge if its the starting battery . i have a 2006 honda accord 4 cylinder lx se. witha stock radio, will take any helpful information

  2. #2
    Constant Bitrate
    Join Date
    Aug 2005
    Location
    Pennsylvania
    Posts
    213
    That seems like a lot of equipment you have there. One main problem that I do not see that you have addressed is the alternator. Have you changed that to a higher amperage output one yet? I have a 2000 accord with a system that puts out about 1500 watts constantly and the first thing that I did was swap the stock alternator with a high output 160 amp alternator and get a yellowtop battery. From what I know, stock 2006 Accord alternators put out about 80-90 amps, which is way to low for your application. Try to find an aftermarket high ouput alternator (some shops can even respool it for higher amperage).

  3. #3
    Newbie
    Join Date
    Feb 2007
    Location
    new york
    Posts
    9
    yea i have a stock alternator, but i was told they didn't make higher output alternators for my car, do you know any place online that has one specificaly for my vehicle

  4. #4
    Newbie
    Join Date
    Feb 2007
    Location
    new york
    Posts
    9
    i have a red in the front for starting and a yellow in the back for the system

  5. #5
    Low Bitrate BenOBS's Avatar
    Join Date
    Aug 2006
    Location
    QC/CA
    Posts
    94
    it would be easier for you to use to identical battery and connect them in parrallel... Isolator lower the second battery voltage (around 1.5v)....

    but, its true that a little alternator cant keep you system completly charged if you never do long highway run with you car...
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