westend wrote:
With a bank of two-6V's it will be wrong almost all the time.
If the batteries are discharged and the RV is returned to storage, the battery "tender" will not charge the batteries correctly.
RE: being "wrong": it might not be optimal but being off just a bit from optimal is usually insignificant.
And whether or not the tender will recover from a near to complete discharge.....that depends on the tender in question and the time frame available. Many won't; some will.
It is a matter of preference.
Both options can work fine if done right.