Which one would control the charger and keep it charging at 14.3 (or so) volts continuously (bulk charging rate)?
The Link is an on/off IF you use the telphone cable to the Freedom
RTFM? F stands for Funny.
I know, it took me a while, twelve years ago, to figure it all out. It is in the Freedom manual and the better Link manual is the one for the Link 2000 available online in discontinued Xantrex products. Might be similar to the Link 1000 manual, but IIRC has more info.
As Maine Sail is fond of saying, even three stage chargers are not really smart.
The Freedom is a three stage charger generally controlled by time, not battery's condition or voltages.