Built in battery charger and monitor

[crieders]

Built in battery charger and monitor
I started out looking for a battery monitor for my AGM starting battery and two house batteries.
I saw at West Marine a built in battery charger for three batteries, with automatic reconditioning and a monitor  feature . I never thought much about this approach since I am on a hook  but of course it may be useful when I am on the hard six months out of the year since I do have access to AC power
Has anyone tried this approach?

[KWKloeber]

would be nice to have a product link?