I have a what I call a DUTY POWER INVERTER. It is a 600WATT PSW Small unit direct connected to the main battery switch. I can leave this on all the time if I need too...

I ran two extension cords from the Power Inverter with multiple tap receptacles and OFF-ON switch on them. One is on the back of the cabinet top at the Home Entertainment units and the second one is on the back of the table top near where we sleep... This lets me power alot of the so called necessary low power 120VAC items one needs when camping..

These are always ON for the most part and can be used anything anywhere we are at...
Even tho it is a 600WATT PSW model I very seldom use more than 250-300WATTS at any given time...
Just neat to have 120VAC PSW clean voltage available when we need it for something small...
When camping off-grid I watch the main 12VDC Voltage meters pretty close all the time. If they ever get down to around 12.0VDC then I will stop using power and wait until I can fire up my 2KW generator with my trailer connected and let my on-board PD9260C Converter/charger unit bring my batteries from the apprx 50% charge state to its 90% charge in about three hours of generator run time. This is usually around 8AM in the morning... I will never start my next day/night use of the batteries unless they start out at least 90% charge state.
Been doing it this way since 2009 and it is all second nature now running my small Power Inverter when off grid...
Roy Ken