A few years back, we had an ice storm that knocked out power for about five days. I like to keep our PC with a full tank of gas and the generator exercised at all times. During the ice storm, the rv generator and a bunch of 12 gauge extension cords were sufficient to:
1. Run the blower on the HVAC system in our house and
2. Run two refrigerators (one in the house and one in the garage)
We accomplished this by running the gen for only a couple hours a day and using the fireplace to help warm the house. I would power up both refrigs at once, run them a while and then switch to the HVAC to supplement the fireplace. We kept our house in the mid 50s and did not open the refrig to get anything out unless to do so quickly. A household freezer or refrig will stay really cold for a long time if you supplement it this way. Of course, since it was winter we could also put stuff on the back porch to keep it cool.
Under the current situation, I am preparing for the same possibility of using the rv genset to keep the refrigs running if we lost power. That is not a high probability but I am prepared in any event. Also, a full tank of propane keeps an rv refrig going for a very long period of time.
Just something to think about for those of us that have our rigs at home or stored close to home. Back then, we had a Class B (before the PC) and it had a 2800 Onan. With the 4000 Onan in the PC, I might be able to run all three at once. I haven't made the calculation and really won't do so until necessary, which I don't suspect will happen in the current crisis. But preparation and thinking a lot of things through seems to me to be pretty important in planning for the weeks ahead.