Battery started dying when I installed a deep cycle battery. (Kinetik HC1400)

[dizz10dizz]

Hi,

I recently purchased a Kinetik HC1400 and installed it in my car for extra power. I have a 2011 Hyundai Elantra with stock battery and stock alternator which is 90 amps. I ran the positive wire from the battery under the hood to positive terminal on the HC1400 and then positive wire from HC1400 to pos terminal on my amplifier. I then grounded the HC1400 to the frame. The amp is grounded to the frame as well.

So the wire path from the battery under the hood it goes...

pos terminal under hood...wire...fuse...wire...HC1400 pos terminal...fuse...amp

My reason for asking is because I installed the battery yesterday and now today the battery under the hood is dead, as well as the HC 1400 is dead. The battery under the hood was resting at 12.7 volts...and so was the HC1400...now they are dead. Double checked to make sure amp was off...

Any info on how to fix this would be great.

Thank You

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[jteske88 10+ year member]

well such a big drain like that means there has to be something else drawing power. can you think of anything else you might have done or change? do you know if maybe you burnt you alt up and it no longer charges the batts?

 

[MutantDreams 10+ year member]

Might be parisitic equalization. They kill each other trying to balance voltages. We're bothe batteries fully charged when you installed it?

 

[Varinabassing 10+ year member]

get the car running and see if the alt is charging the batts with a DMM. Try disconnecting the battery in the back for a day just to eliminate that as a source of the problem

 

[Kingstroker 10+ year member]

both batteries must be fully charged before installing

 

[slim217 10+ year member]

should look into a isolater always comes in handy when running two different batterys

 

[dizz10dizz]

Sorry for the late reply everyone but just recently tested both batteries and it turns out the Kinetik wasnt fully charged..the alternator is working but im prolly gonna have to upgrade it soon...Just bought a 150 amp solenoid to isolate the battery in the back but it seems now that there is hella voltage drop with the isolator installed...after cahrging both batteries and with the car on charging both batteries, I was gettin about 14.3 volts but after installing the isolator, I can't seem to get over 11 volts...

 

[momofx 10+ year member]

Wow, I'm surprised nobody mentioned that its a BIG NO-NO to mix agm deep cycle with wet cell batteries and they could actually kill each other, by parasitic drain. Someone did mention the drain though...

If you go agm deep cycle, you want all the batteries that are in parallel with it to be the same type ie. agm deep cycle...

 

[dizz10dizz]

ya i figured that was the problem to begin with...both batteries died on me again last night so im just stickin with one now til i get enough $$ for a second deep cycle. Does anyone know of any isolators that dont have much voltage drop?? Thanks everyone

 

[momofx 10+ year member]

I have never had luck with isolators - just get rid of the wet cell / std battery in there, get a matching deep cycle, run it in parallel and install a voltage gauge up front so you can watch your volts.

 

[sexy 10+ year member]

Wow, I'm surprised nobody mentioned that its a BIG NO-NO to mix agm deep cycle with wet cell batteries and they could actually kill each other, by parasitic drain. Someone did mention the drain though...
If you go agm deep cycle, you want all the batteries that are in parallel with it to be the same type ie. agm deep cycle...

It is sad that no one told him not to mix types but it has been said so many times on this forum. To me I seams like the problem may be the amount a battery salesmen we have lurking about in this forum and that they have some influence over the mods. Now I may be wrong but why isn’t there a sticky on this topic since it is the topic that’s comes up every day???????????????????????????????????

I think you all know the answer.