Controller
Junior Member
Now here is my story;
I have a 18'' fi btl sub and a 4000watt amp being powered by 5 batteries (one up front and 4 in the cab)
I recently had to change the batteries because they all started going bad (just really old, no problems that i know of)
The first batteries i had were cheap 650 crank amp used car batteries, and the new ones i just bought are 4 Red Top Ultima 1000 crank amp batteries and one normal interstate up under the hood.
My problem is this;
As soon as i connected all the new batteries (positives to positives & negatives to negatives), the voltage is like stuck at 12.3 and will not go any higher, almost like its capped out
The voltage drops to 11.8 when i slam the sub hard, in tern cutting out the amp since it doesn't get the power it wants.
However the altenator charges it back up to 12.3 VERY fast so i dont think the alt is bad
Yes all the batteries are connected to the front battery which is connected to the alternator, which is 100 amp. (not that high i know but it is after market and worked fine for 4 years charging 5 batteries constantly, and even though its getting kinda old, it still charges fine)
My Question is;
What is the problem that is causing my voltage to be stuck at 12.3 even though they are all brand new batteries (and all good), and how can i fix this.
PLEASE help.
I have a 18'' fi btl sub and a 4000watt amp being powered by 5 batteries (one up front and 4 in the cab)
I recently had to change the batteries because they all started going bad (just really old, no problems that i know of)
The first batteries i had were cheap 650 crank amp used car batteries, and the new ones i just bought are 4 Red Top Ultima 1000 crank amp batteries and one normal interstate up under the hood.
My problem is this;
As soon as i connected all the new batteries (positives to positives & negatives to negatives), the voltage is like stuck at 12.3 and will not go any higher, almost like its capped out
The voltage drops to 11.8 when i slam the sub hard, in tern cutting out the amp since it doesn't get the power it wants.
However the altenator charges it back up to 12.3 VERY fast so i dont think the alt is bad
Yes all the batteries are connected to the front battery which is connected to the alternator, which is 100 amp. (not that high i know but it is after market and worked fine for 4 years charging 5 batteries constantly, and even though its getting kinda old, it still charges fine)
My Question is;
What is the problem that is causing my voltage to be stuck at 12.3 even though they are all brand new batteries (and all good), and how can i fix this.
PLEASE help.