In the wiring space behind the helm.
Easy to take a quick look and see if the set is 100$ and on Float.
We chose the Trace C 12 (12A of charge control).
The unit is very easy to adjust , so in summer when the boat sits for 6 months the charge voltage is lowered to reduce water use.
In winter during boat use the full charge is set back to 14.4 , and the float to 13.8 , as we check batt water monthly in season.