Usually the inverter runs fridge, LR and Bedroom TV, an outlet tied to the tv’s, all 12v overhead lights, and on newer models an outlet by or over the bed to run a cpap machine.
If you only have 2 house batteries, and not enough solar, you can set your Gerset to automatically run and recharge the house batteries until you can install more power storage. Gen will shut off when preset level obtained. (Got to have more than a quarter tank of fuel for the Gen to auto run.)