kompressorfed

So I had the "conv features disabled, batt. protect" message one day last week after starting it and it went away pretty quick. Then I went away for 5 days while car sat outside in the snow and freezing temps. When I got back it was completley dead. So I changed both batteries yesterday and now just want to see what our voltage should be on the display. Im getting 12.9 right after shutdown then sits at 12.3. When idling I get 13.9-13.8 and with heated seats, stereo, climate control and hid fogs on I get 13.7 but not below that. I figured 13.9 was good till I searched and saw some guys says 14.4 when idling. So is my voltage regulator on its way out? What is everyones voltage when in dynomode?