I have:
(2)12 volt (Deka marine group 27) for 12v stuff
(2)12 volt(Alliance) starting batteries
(4)6 volt (Deka pro master) for the inverter
I don't know where or if I have a set up just for the fridge. Right now the 4 (6) volts are just for the fridge and it does not hold.
I never heard of Deka, maybe thats the problem