Charging at 15 volts!!

[H22A91CB7]

i read in the Haynes manual that you should see you batt charging at 14 to 15 volts with the car crunk, mines charges at 13volts for some reason im getting ready to do the big 3 upgrade, but even with that i read that you only get 14 volts so im asking how is it that you can make it charge at 15 volts???

[wed3k]

high 13's should be fine. whats your battery at? a full and low battery can differ as much as half a volt.

[H22A91CB7]

high 13's should be fine. whats your battery at? a full and low battery can differ as much as half a volt.

with the car off its at 12, running its at 13 - 14 jumping back and forth, i ran a 4 gauge wire on the ground to my batt in the trunk from my alt and it charged at 14, i think ima run a wire now

[bcjammerx]

sounds like bad connections and corrosion...sound like you found what needs to be done...new wires!!!

[H22A91CB7]

sounds like bad connections and corrosion...sound like you found what needs to be done...new wires!!!

so charging at 14 isnt bad?? that isnt overcharging?....wat if i was to get it to 15 would that be overcharging??? sorry for the rant

[C91BLX7]

Its like over 14.7v or something is considered overcharging.

[H22A91CB7]

Its like over 14.7v or something is considered overcharging.

my meter only shows 13 or 14, no .1 .3 nothing like that, and the haynes manual says it should charge from 14 to 15 volts

[bcjammerx]

14 is the usual for the alt. to charge. The battery is a 12v, the alt pushes out 14

[wed3k]

13 is fine.

[moetan]

you don't ever need 15. 13.7 is about normal for any car but any time you get more then that you can start having problems with the rest of the system considering the fact that its not set up for voltage that high. if you have 13 then go with it. it will work fine.

[H22A91CB7]

i read on here where a member did the big 3 upgrade and now he says he charges at 14.7 allday long, also im running a system, 55w hids, fogs, ac and a ps2 in my car...

[bcjammerx]

you don't ever need 15. 13.7 is about normal for any car but any time you get more then that you can start having problems with the rest of the system considering the fact that its not set up for voltage that high. if you have 13 then go with it. it will work fine.

every alternator I've tested puts out 14v...my electronics manuals say the same

[be3p067]

You don't really want 15v. Anytime you got more then 14.7 going to a battery it's bad news. anywhere above 12 and below 14.7 is good.

Edit:

You need a better meter if your's does not do decimals. Or you need to learn to use it if it does. there's a big difference between 13.1 and 14.9.

[moetan]

with all stock wiring 15 volts is to much. it will cause problems. when you start upgrading the system it will in turn handle more. The bigger the wires the more power they can safely provide. Check up on the voltage for the battery.