if there is a long wire run in your RV between the converter and the batteries
an external charger connected directly at the batteries might do a faster recharge
several years back i installed a NEW WFCO 98100 (100amp smart converter)
I have been happy with
i also carry a B&D Vector 40amp charger
i have two battery banks, and a long "detoured" wire run between the wfco and the second bank
so occasionally i put the B&D 40 on the second bank for a full top up
I also use the B&D to condition one bank while running off the other
whether or not an external charger is the best option for you
depends on the current installed converter and its location and wire run to the batteries
