The 13 volt was a running low idle (1000 rpm) with no accessories on.
So basically first start up of the day ( low idle 1000 rpm) it climbs ( slowly) to 15.30 volts on battery with no accessories on.. Then when I go for a ride ( roughly 10 miles) it drops to 13.10 ish volts at low idle (1000 rpm) no accessories on. and all the time my ammeter is sitting pretty much center of the gauge..
I have never changed the alternator nor had it tested in 6-7 years.
Thanks .
