normal resting battery voltage

[Stoner51]

I have been monitoring my electrical pretty closely due to the SPAL fans I installed. What is the normal battery voltage for a good battery?
And what is bad?

I have checked it numerous times over the past week. After I shut off the car the voltage is 12.6 and after 3 hours it is about 12.3.

The next day the voltage is 12.1. To me this seems low.

steve

[sonikaccord]

What kind of battery do you have and what are the specs on it? I would think anything under 11.5 ish volts is low. At least for a lead acid/agm battery.

[Stoner51]

It's a duralast gold 34 series.
It's only about 12 months old. I have been reading on the net about people's resting voltage being around 12.6-12.8. So 12.1 seemed a little low.
I got a discount code from advance which is where I get most of my parts from so I used it on their AGM 24 series battery. So hopefully I will get better luck.
My first choice was xs power but $140 compared to $320 was a no brainer for me.

Steve

[accordztech]

12.1v is a low state of charge. At 11.5 thats to low.

Its duralast. If its red u have 2 year replacment. Take it in and they will test.