I have a 24 V BJ73. I am putting in some 12V accessories such as new climate control system, radio, etc.. I have a 40 amp voltage converter to step down to 12V, but I am doubting whether or not it is really necessary. I noticed relays between the 2 batteries sending 12V to the lighting. I have read some post that 24 V is only for the starter/glow plugs etc... I understand that If I tap between the batteries to get 12V that "theoretically" I will be pulling and charging 2 unbalanced batteries and again "in theory" this will cause problems.......Has anyone ever had/caused any real problem doing this?.....I'm wanting to run my electric radiator fan and AC clutch this way....I'm guessing this would cause one battery to have a slightly shorter life than the other.....Again I'm looking for real world experienced problems or not.........