Should batteries be disconnected when on shore power?

skipro3 wrote:

Second, there is no reason to disconnect your batteries during the normal life of the RV unless maintenance or replacement is required.

Well join the crowd. There is another terrible bit of advice. :E

If they will sit unused for more than a few days in a place where external power is not available to maintain a charge, they absolutely should be "disconnected" to prevent parasitic drains from making them dead.