Your readings seem normal to me. During the day and evenings you are using more battery power via lights, awning, charging batteries on laptop etc. That usage drops your voltage. At night you have very little draw going on because your sleeping. So if your not running your furnace your battery voltage gets it's rest period and will show closer to its actual voltage. This can be slightly higher than you read previously. Very normal.
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2018 Chateau 24FS
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