It got a little scary last night - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Infidel67 · 11-07-2023, 08:11 AM

Every time I'm working on the car I got my system playing Music (Rammstein)
I Always use the NOCO GENIUS5, 5A Smart Car Battery Charger to trickle charge it. So I have a 300 amp AM Alternator, going into the Yellow Top AGM Battery I also got a second battery XS 750 Series AGM mounted where the stock Amp used to be, both batteries are on a 250 AMP Dual Battery Smart Isolator which I believe went bad or something, you only turn it on when the main is drained so you still be able to crank your car and you have to immediately turn it back off after.
Well long story (Sorry) short my secondary was about to blow, big bulge, I got a new one coming but I think I will just connected in Series instead of the Isolator. Of course I disconnected it immediately and moved it away, That's the reason I got a FE in my Car lol
Anyone got an Idea what has happen here?

Caveman_SS · 11-07-2023, 10:56 AM

Man, that's pretty sketchy

Glad you caught it in time before it got worse.

Dega Man · 11-07-2023, 11:08 AM

If you connected in series, you doubled the voltage to 24 Volts DC which is not good the electronics which is good for no more than 16 volts DC. When running two 12 Volt batteries in your car that's a 12 volt system, you should connect them in parallel (positive to positive and negative to negative to negative) this will give you increased current and capacity potential but still be 12 volts.

Infidel67 · 11-07-2023, 02:39 PM

Quote:

Originally Posted by Caveman_SS

Man, that's pretty sketchy

Glad you caught it in time before it got worse.

You got that right lol

Infidel67 · 11-07-2023, 02:43 PM

Quote:

Originally Posted by Dega Man

If you connected in series, you doubled the voltage to 24 Volts DC which is not good the electronics which is good for no more than 16 volts DC. When running two 12 Volt batteries in your car that's a 12 volt system, you should connect them in parallel (positive to positive and negative to negative to negative) this will give you increased current and capacity potential but still be 12 volts.

They are not in in series, and I don't like Cap's

Dega Man · 11-08-2023, 03:03 PM

My mistake, I interpreted your last sentence in the original post the wrong way, it stated you made a connection in series, I took it you were speaking of the battery, sorry.

chevy pilot · 11-08-2023, 08:51 PM

Have you taken the XS battery out of the box, is there a crack in it ?

NZZL1 · 11-09-2023, 01:10 AM

Quote:

Originally Posted by Detleg

I have a 300 amp AM Alternator, going into the Yellow Top AGM Battery I also got a second battery XS 750 Series AGM

Please confirm that you are not charging both batteries in parallel. If you are, this will be the cause of the failed battery.

Infidel67 · 11-09-2023, 02:08 AM

Quote:

Originally Posted by chevy pilot

Have you taken the XS battery out of the box, is there a crack in it ?

Yes, no crack and still holding charge

Infidel67 · 11-09-2023, 02:10 AM

Quote:

Originally Posted by Dega Man

My mistake, I interpreted your last sentence in the original post the wrong way, it stated you made a connection in series, I took it you were speaking of the battery, sorry.

No problem Dega

Infidel67 · 11-09-2023, 02:10 AM

Quote:

Originally Posted by NZZL1

Please confirm that you are not charging both batteries in parallel. If you are, this will be the cause of the failed battery.

Look at the Pic and you can see it

chevy pilot · 11-09-2023, 03:36 AM

Quote:

Originally Posted by Detleg

Yes, no crack and still holding charge

How old XS battery ?

Infidel67 · 11-09-2023, 09:20 AM

Quote:

Originally Posted by chevy pilot

How old XS battery ?

A year old, like I said I think the Isolator made a boo boo

gtstorey · 11-09-2023, 09:31 AM

I'm struggling to come up with a scenario how wiring either on parallel or series would damage the battery. In series you get 24 volts but that will hurt everything other that the battery and would not keep the batteries charged. In parallel and nothing bad happens, just like using jumper cables or how many diesels 12v trucks are wired.

It looks like an internal battery problem to me.

11-07-2023, 08:11 AM	#1
Infidel67 Life's just a Ride Drives: 2011 Synergy Camaro 2SS/RS LS3 Join Date: Oct 2013 Location: Columbia SC Posts: 854 View My Garage	It got a little scary last night Every time I'm working on the car I got my system playing Music (Rammstein) I Always use the NOCO GENIUS5, 5A Smart Car Battery Charger to trickle charge it. So I have a 300 amp AM Alternator, going into the Yellow Top AGM Battery I also got a second battery XS 750 Series AGM mounted where the stock Amp used to be, both batteries are on a 250 AMP Dual Battery Smart Isolator which I believe went bad or something, you only turn it on when the main is drained so you still be able to crank your car and you have to immediately turn it back off after. Well long story (Sorry) short my secondary was about to blow, big bulge, I got a new one coming but I think I will just connected in Series instead of the Isolator. Of course I disconnected it immediately and moved it away, That's the reason I got a FE in my Car lol Anyone got an Idea what has happen here? Attached Images __________________ 2011 Synergy Camaro 2SS/RS Ls3, LTH, CAI Custom Intake, TSP stage-3 111-LSA Cam, RWHP 503/508

11-07-2023, 10:56 AM	#2
Caveman_SS Will Cave Drives: 2010 Victory Red 2SS LS3 Join Date: May 2023 Location: North Carolina Posts: 118	Man, that's pretty sketchy Glad you caught it in time before it got worse.

11-07-2023, 11:08 AM	#3
Dega Man Drives: ZL1 Join Date: Oct 2012 Location: Talladega Posts: 631	If you connected in series, you doubled the voltage to 24 Volts DC which is not good the electronics which is good for no more than 16 volts DC. When running two 12 Volt batteries in your car that's a 12 volt system, you should connect them in parallel (positive to positive and negative to negative to negative) this will give you increased current and capacity potential but still be 12 volts.

11-08-2023, 03:03 PM	#6
Dega Man Drives: ZL1 Join Date: Oct 2012 Location: Talladega Posts: 631	My mistake, I interpreted your last sentence in the original post the wrong way, it stated you made a connection in series, I took it you were speaking of the battery, sorry.

11-08-2023, 08:51 PM	#7
chevy pilot Drives: 2010 2SS/RS A6 Join Date: May 2019 Location: Hki.Finland Posts: 952	Have you taken the XS battery out of the box, is there a crack in it ?

11-09-2023, 09:31 AM	#14
gtstorey Drives: 2010 Camaro SS2,L99, LSA SC Join Date: Aug 2017 Location: Huntsville, AL Posts: 2,155	I'm struggling to come up with a scenario how wiring either on parallel or series would damage the battery. In series you get 24 volts but that will hurt everything other that the battery and would not keep the batteries charged. In parallel and nothing bad happens, just like using jumper cables or how many diesels 12v trucks are wired. It looks like an internal battery problem to me.