I have some past experiences with recent power outages. I live and have two rentals in the Santa Cruz Mtns in northern California.
In Aug alone we had a total of 10 no power days,some lasting 30 hours. The utility company was not honest about the outages at all.
Our STR has propane for the stove and hot water.
We also provided a propane powered inside heater.
Luckily the guests at that time where comfortable and patient as we kept them in the loop about any updates.
It’s always an adventure living in the mountains
The guests who choose to stay here understand this and no one has ever complained.
I couldn’t live anywhere else as this is my happy place.