Originally Posted by 6PakBee
Originally Posted by justinp61
It tested 14.7-8v at the alternator at idle and 14.8 + at I'd guess 4000 rpms, at the battery it tested 14.5-6v at idle. When I called Powermaster I gave the tech the p/n for the alternator and asked what the idle output should be? after telling him what size pulleys I'm running he said 14.8v. Then I gave him what my voltage readings were and he told me that my charging system was working perfect.


This intrigued me so I sent an email to the Deka tech line asking about allowable charging voltages for the 24M7 and here is the response:

"Good morning, the operation should be 12.6 - 12.8 , when is charging 13.5 - 14.2"

From this I think you may be overcharging your battery. You may want to check with Deka yourself as I could have misrepresented something.


You may very well be right, it was my first thought too, just not thinking about the battery not being able to handle the voltage, but the alternator output being to high.
It appears I need an automotive type battery.


Thanks.