More often than not your battery charger will be located out of sight and the front control panel may not be easily accessible. To deal with this quirk many quality chargers offer a remote display panel. They are a great feature to look for when choosing a charger.
The remote for the Sterling ProCharge Ultra is quite feature packed and offers a multitude of options including monitoring DC output voltage, AC input voltage, DC current output, battery temperature, charger temperature, transformer temperature, total charging time, charging time this event and just about anything the charger is doing or has done. It is one of the most informative remotes I have seen on a battery charger at any price point. It is a very nice piece of gear.
Wiring the remote is simple, four mounting screws and two plug & play phone jack type connections. It can be flush mounted or surface mounted and both options are included with the remote, plus the cable.
Marine chargers from companies like Sterling, Mastervolt, Victron, ProMariner & others will often have a remote option.
NOTE: Unfortunately this remote can not program the Sterling ProCharge Ultra charger and this needs to be done via the front panel of the charger itself. I am not yet aware of a software update that will allow programming via the remote.