Xantrex inverterg/charger shows full charge at 12.2V

Thanks for all the suggestions. As usual, turns out that the simplest solution worked - I looked in the manual on how to adjust the voltage where it goes to bulk, absorbtion, float and didn't find anything but the next chapter mentioned that the battery temperature automatically adjusted voltage so I decided to try that and disconnected the battery temp sensor and sure enough, that fixed my problem. Batteries weren't charged or used much so I'm guessing my sensor failed.