After my battery change, at idle mine is usually from 13-13.5 - sometimes while driving it goes up to 13.8 but not often, usually holding around 13.5 - at idle it can dip to around 13.0 with seat heat and IHKA on - should I be looking into a new alternator? Don't want to wreck the new Bosch AGM lol

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2018 Ram 2500 6.7L Cummins 68RFE
19k miles -Bright White/Black - Big Horn Sport - Crew Cab Short Bed
2013 X5 35D (CEO's) - Born on 5/17/2013 -
82k miles - Alpine White/Cinnamon Brown/Premium Pkg, Sport Activity/Premium Pkg and Sound/20" Style 214/Running Boards