I have 3 Batteries in House Bank (550 amps ) wired in parallel , when connecting the positive from Solar controller, does it matter to which positive battery terminal connection is made ? I am of course looking for the most efficient charging . Thanks in advance
IMO it's not really that critical if the batteries are wired in parallel. But, if you want to be super critical efficency wise I would wire it to the center battery of the string just to minimize any wire energy loss with charging to the end batteries in the bank.