Charging seems to be OK, but battery may be low.
Using the Hidden OBC Menu is sometimes hard to judge due the the load on the battery while the ignition is on.
Fully charged battery should have surface Voltage of 12.6 Volts.
12.1 Volts is very low, BUT you have internal Voltage drop within the vehicle that can color results a bit AND to have the OBC running, you have a big load on the battery.
I have no checked mine via the OBC, but anything below 12.3 Volts has me a bit worried.
If the vehicle is used for a lot of short drives with a lot of stops and starts, this can be hard on the battery and low cranking Voltage can cause havoc on the modules in the car.
Best to get the battery fully charged and tested.
Buy a battery charger, EVERYONE needs at least one good one.
Do not just get a battery maintainer, these do not have enough current to really charge a battery.
These are nice chargers -
http://www.amazon.com/SOLAR-PL2310-P...W2T0VR46GRDG1A
http://www.amazon.com/SOLAR-PL2320-P...W2T0VR46GRDG1A
http://www.amazon.com/SOLAR-PL2520-P...s=SOLAR+PL2520