alternator and inverter dc charge

[David Brady]

Folks,

Maybe you can help me understand something. When the
engine alternator is supplying electrical power and there's
a source of 120V ac power (shore power or generator),
and the house batteries require a charging current. Is the
charge current coming from the inverters and the alternator
or just from the alternator? If the charging current is coming
from just one source, alternator or inverter, what makes that
happen? For instance, if the charging current is from the
alternator, is there an isolator somewhere that isolates the
inverters, or do the inverters simply see a high voltage on
the batteries and back off into a float charge state?

Thanks, (Feel like a newbie all of a sudden)
David Brady
'02 LXi, Smokey
Va