In my 85 digijet Westy I have a new 90 amp alternator (10 months old) a new battery (41-4/810CA) 2 days old.. I just drove it 200 miles at 3500 rpms... it never got above 12.9 volts and overnight it dropped to 12. with no load...

I am under the impression, after reading the graduate course in batteries we have been generously given over the  past week or so,... that a battery in good health should be charged to 13.something when all is right in the world... am I mistaken?? if not what should I do next... I am off on my annual long distance Westy cruise and would like to get everything in order before I get too far into the hinterlands...

Please advise

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