Almot has it right. You have all the information you need and more information is not going to enable you to do anything differently. The charge controller only feeds a low battery. When the load drops so does the rate of discharge of the battery bank and the controller senses this and adjusts the charge voltage down to compensate.
With your RV do you care about how many ounces of fuel per minute your engine burns or if it enough to know the current fuel level in the tank? I know that if my batteries in the morning are above 50% DOD and by nightfall they are at 100% that all is OK. No need to over think this.
