Voltage drop after replacing with new batteries

[RV_Goose]

I have been working from home for a couple years now. My truck sits for 2-3 weeks at times. I am with with the wife in her van or on my motorcycle. Now I put it on a charger after 7-10 days because my batteries discharged from sitting this winter, and they were original from April 2020.
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The replacement batteries are "SLI94RAGM Duracell Ultra Platinum AGM 800CCA BCI Group 94R Car and Truck Battery" from Batteries Plus.
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I used to see 14.2 on the dash gauge with the stock batteries, while running. The new batteries are rated slightly higher than the stock batteries. But now I am seeing a peak voltage of 14, occasionally 14.1. But usually 13.8 or 13.9. I probably just did not pay attention previously, so it is probably just me and the new normal and all is well. Even with the camper attached (all old incandescent bulbs on the trailer), I still see 13.7-13.8 on the gauge. Once running, the voltage comes up quickly.
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What should I look at? If anything?

 

[CdnHO]

13.8 is basically charging voltage. Once shut down for a few hours the voltage will drop to high 12s or resting voltage. Mine shows around 14.1 running and after a day I am down to mid 12s.

 

[AH64ID]

Is it hot out? Charge voltage is based on battery temp and state of charge.

I only saw 13.5V yesterday in 90° weather.

 

[RV_Goose]

Is it hot out? Charge voltage is based on battery temp and state of charge.

I only saw 13.5V yesterday in 90° weather.

Yeah...it's been 95+ lately. Summer in Piedmont region of NC.

 

[Arth]

Yeah...it's been 95+ lately. Summer in Piedmont region of NC.

I think also it should be pointed out that new batteries should require less from the alternator since they should have a better health after their initial charge.

To me it makes sense. Older batteries that aren't performing as well will need a higher output from the alternator because their charge capacity is reduced from age and wear. They'll need recharged more often because of this.