Camping off grid it wouldn't matter and when plugged into 240v it wouldn't matter enough to really worry about anyway but I see why you asked ......... an interesting question really, all my stuff is individual units so I'm lucky in being able to turn on or off and that includes the solar controller which does come in handy at times also..... my 240v charger just sits there turned off, in fact when the old Redarc died I really shouldn't have bothered replacing it as my solar does the job but about 12mths ago or more I had 4 days of heavy cloud cover and needed the genny to juice things up but it hasn't been used since....like a spare tyre hardly used but when its needed its a godsend.
@Falco , the matter of the 240 volt inlet being connected has nothing to do with your Victron controller. The solar input from the solar controller (Victron) is or should be connected directly across the battery terminals. The 240 volt charger (Setec) is also connected to the battery whilst the Drifter control just monitors battery voltage, power usage and anticipated time of battery capacity at current nett usage. The fact that you have a good charge solar system is irrelevant. If the sun God is not with you and you are off grid, you will run out of power unless you have access to 240 volt power - grid or generator. As
@Drover said, you may not think you need it, but in fact you should use the 240 volt system when able to do so as it saves having to rely on sunlight. In fact when at a powered site with 240 volt available, the SETEC will put more charge into battery/ies
day and night than your solar will. During the day when connected to 240 volt power AND your solar panel is capable of providing charge as well, what happens is that the 240 volt system will do the quick "heavy lifting" until it senses battery voltage of FULL charge (approx 14.0 volts) and changes to Float charge (approx 13.8 volts). Up to this point the solar controller may also be feeding in current with the SETEC. When the Setec reaches and stabilises the Float voltage, the solar controller will continue to charge the battery to the
solar controller charge voltage settings (what ever you have set on your Victron ) - ( suggest max charge voltage for
Gel battery at 14.3 volts and Float voltage at 13.8 volts, or whatever is recommended on side of your battery/ies. If AGM type, suggest 14.7 volts max charge and 13.7 volts for Float or whatever is recommended for
cycle use. The solar controller will then keep topping up the voltage above the SETEC limit during periods of sunlight. After dark, it has no input and the system defaults to the SETEC voltage setings. So IMHO do not disconnect your alternative source of power. Details of batteries and charging voltages are shown in pictures below. I hope this helps you understand the advantages of having BOTH facilities.