Were you running central air, and electric hot water heater?
Only because I had to install it 24 hours after Katrina hit, I used my pool pump 40 amp circuit to "back feed" my isolated from City, main Breaker panel... The 75 amp generator can run 3 ton AC if wiring is right.
NO.
I ran 3 refrig/freezers, 3 window AC units, total house power, including Microwaves, area fans.
My water heat, grill, stove and oven are propane.
I eventually let 2 neighbors use extension cords to run their refrigerators.
Here is the key...
The idle speed for the LPG motor/generator is about 20% of available power. Coining the phrase..
If you don't use it, you lose it...
Power Companies understand this and just about give away Night time lighting power.
My 500 gallon buried tank, can only be filled with 380 gallons of LPG.
380 gal/22 days = 17 gallons per day or using some, mad scientist conversions, I used about 12 Amps [120VAC] per hour on average per day. I had refugees too, all slept comfortably under AC with area fans.
I have since built homes/businesses with proper wiring and City Power Disconnects. If designed properly, you can survive very well on 8kw generators. Last one I did that size cost the owner ≈$3,000 , turn key with automatic start and system check every Friday afternoon at 3pm.
The have automatic switching to internal power in less the 10 microseconds.
Jim...