Anyone still running a rotronics rdc12 duel battery system?
My car has one installed by a PO however it has only ever had a single main battery during my ownership, given the unit is 20+ years old I can’t find anything on the net. (I found a rda12 which is similar but different) Have only recently got a 2nd battery so would like to figure out if the rdc12 still works before paying money for another system.

Cheers