Yeah, but...
My 7.5 KVA will run the entire house, excluding only the A/C. Heat is GFA, but we use wood instead... so really, it is running only a fridge, freezer, lights, and the computers/TVs.
Now way that needs even a SURGE of 7.5
You have good sense and probably read instructions, not everybody does.
I'm a retired electronic tech and a relative called me to look at his fried 12KW, tried to run the central air and everything else, kept resetting breakers (all electric house).
A neighbor ruined the engine on his 7.5 by not changing the oil after running just about 24/7 for 3 weeks (just kept adding oil, never changed it).
Think he learned his lesson with the price of a new 14.5 HP OHV Briggs engine.