In the case of my TT it was reported to be pre-wired for inverter. The pre-wired location amounted to only two receptacles in our bedroom. There was a buss bar located in my foward storage compartment, where you can run a short wire from the inverter mounted in the area.
I guess the factory engineers figured that an owner would use an extension cord to some appliance or either a person would plug something directly into the receptacle. Well that's not always possible for items such as your tv in the living area, or a microwave as an example.
There are ways you can power up your 110 volt system throughout the unit, but comes with a lot of ifs, ands and butts. I can write a lengthy reply, but if you are not familiar with all things electrical, I recommend you ask around your location to see if there are any rv repair guys familiar with upgrading your unit to an inverter and solar setups.
This does not have to be solar involved. But normally folks familiar with upfitting for solar are experienced with wiring size requirements and equipment related to improving setups that's pre-wired for inverters. I actually did the same thing even though I still have one dedicated receptacle for my 2000 watt inverter.
A side note, as far as coffee pots, a K cup can draw as much as 1500 watts, which sucks the bulk of power from a 2000 watt inverter. So if you use an electric coffee pot stay with the regular Mr. Coffee type, or use a percolator on your gas stove top, if you have a gas stove.
If you go bigger than a 2000 watt inverter, most standard inverters have a standby requirement for battery power. So if you are boondocking and have minimal amount of solar to maintain your batteries, you will kill them. Make sure you use proper sized cable for the run distance.