H&S Mini Installed now having a battery problem
I recently installed the mini maxx as the manual stated by powering it off of the purple wire under the dash so it powers up when the ignition is on. I tested the wire before and it shows no voltage until the key is turned. This seems all normal to me and the truck is running great. I had driven the truck about 150 miles before a long trip this past weekend and the only thing I noticed is that every once in awhile I would get an error for the Tire Pressure Monitor Sensors, but it was an intermittent thing.
This past weekend I drove about 400 miles and then I parked the truck for two days. I go to start the truck up and click click... battery is dead. So I jump the truck and it starts up fine. I run it for about 20-30 min and shut it off for a few hours and it starts up fine and I drive to where I'm staying and park it overnight. This morning I go to start it and it does start but it's labored meaning the batteries sound drained but it has enough juice to start. I unplugged the mini overnight just in case it might have a slow drain from there as I have not done anything to the truck besides the delete, install mini, and s&b cai. Well after I get the truck started I switch the display menu to show voltage for the battery and I got consisten 14.0-13.8 volts all the way home for 400 miles. Is that the right voltage that I should be seeing? Also, I stopped to grab some food and after I started it up the truck started fine but the mini show 11.8 at first then it kicked up to 12.5 and slowly rose to 13.8. Seems kind of wacky, has anyone else experienced this? Could it be a coincidence that my batteries and/or alternator are going out at the same time I installed the mini?
What should the alternator be putting out?