Mystery plug on Honda Generator

5000 watts/220v is 22.7 amp capacity; which, as to resistance heating or motor capacity, is not much.
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In winter, we'd have to move into the room where the fridge and freezer are, lol.
But yes, it will keep my fridge/freezers cold and a lotta lotta LED bulbs.
I put my freezer out on the deck for the summer. Used to have a fridge out there too, but the neighbor kids kept helping themselves to the popsicles all summer. Then when they had eaten them all, they complained that they were all gone!
I heat with a wood-fired pancake boiler, that has a 4-element, total 80A electric sidearm, that when it gets working full-time, gives the electric-meter a good workout.
80Amp/220v is about 18,000 watts. Needless to say, Ima shoveling firewood. I'd have to run three or four of those 5000 watt generators to be comfortable. Hmm, Ima thinking that's a lotta gasoline.
Thankfully, our community is fed from at least two directions and we are almost never without electric power; and if it does happen, a 30 minute outage would be a long one.