Thanks for the clarification. So that type of refer cannot be used for boon docking unless the battery charge is maintained at 90% SOC or greater. Ditto for starting after storage. Correct?
I would thing that that refer and any RV mfg that used it would have a very short existence except for some very special circumstances.
To me the essence of an absorption refer in a RV is that they use very little battery power and work on propane and discharged batteries within reason. And certainly 50% SOC and 12.1V for a flooded battery is reasonable.
Please post the refer make and model so that it can be avoided.