It can be that simple in 240v-ish countries, where everything in a home is connected to the same two transformer taps outside.
Just install a dedicated branch circuit (or otherwise isolate it so that nothing else is using that branch), plug it in, and all the stuff in the house is indiscriminately somewhat powered by solar.
And...done. That's all there is.
Here in the States, things are a touch more difficult: Our normal residential power is 240v, but our regular branch circuits (and outlets) are 120v by using a center tapped secondary winding on the transformer as neutral.
So to power a house's stuff indiscriminately in the US with a plug-in inverter (or two) would require two different outlets that are each on different transformer taps, or a 240v outlet.
Using a singular regular 120v outlet in the US will only cover about half of the regular stuff in a house, and will never be able to power any 240v loads.
(And, yeah, we have standardized 240v outlets. But they're almost never found in a home except behind major appliances like the clothes dryer and/or electric range. We also have standards for smaller outlets that would be suitable for small appliances like a toaster or a kettle, but they're almost non-existent in the wild.
It'll be a long while before we get approved plug-in grid-tied solar here.)
