Amp Killed battery and alternator twice

[joenavy]

I have a 03 hyundai xg350l with a polk audio 400.1 and alpine mr300 installed in it. Since installing the two amps my battery has died and alternator has been replaced twice. When I connect the terminal to the battery sometimes it gives a lil arch is that normal? I replaced the alternator in march and battery last month the battery died again I took it to the audio shop they said the factory amp was bad I did a factory amp bypass then shortly the alternator dies on the car....I have disconnected the two amps now.

What can I do to fix this?

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[Flex68 10+ year member]

Yours is the OEM 120A alt?

Should be enough to run that system, so something else must be going on...

Sounds as though the alt is not fully/properly charging the battery, you have some serious wiring issues, or both. Not really enough info offered to be certain.

I would say that you need to do The Big Three, verify all your grounds, and ensure that the amp is wired well and gains set up correctly

 

[quackhead 10+ year member]

The amp should not affect the alt like that. Dying regular staring batteries, sure, I had that problem until I bought an expensive AGM Deep Cycle Battery and upgraded my factory charging system wiring. no more problems with dead batteries from plate failure..

 

[Flex68 10+ year member]

AGM Deep Cycle Battery

For sure

 

[hispls 5,000+ posts]

Those 2 amps installed correctly should not be causing that.

 

[joenavy]

Where can I find a deep cycle battery and upgrade the charging system for my car? I looked on optima site they dont sell batteries for hyundais

 

[quackhead 10+ year member]

Kinetik HC1400 (KHC1400) 1500 Amp 60Ah 12V Car Battery Power Cell

http://www.sonicelectronix.com/item_7342_Kinetik-HC1800-KHC1800.html

measure your battery tray and the batt.. you have to make sure you get what fits....get the biggest you can fit and afford.

 

[joenavy]

So how do I upgrade the charging system?

 

[quackhead 10+ year member]

with the system you described, 4ga wiring from the alt to battery, fused near the alt with 150A fuse (I am guessing your fact alt is 120A), 4 ga wire from batt to ground, 4ga wire from engine block to ground. I say 4 ga for what you currently have, If you upgrade to more power/bigger alt, then this wire would need to be upgraded accordingly.

 

[joenavy]

Alright thanks alot....this was extremely informative....the two audio shops I took my car to said that upgrading the battery was not needed but I always felt that I needed a stronger battery....I just have a regular duralast battery in now....thanks again