A couple of unscheduled "tests" yesterday.
First one lasted a couple of minutes, later in the day the second one lasted about a half hour or so. The whole house generator kicked in as designed each time, only about 20 seconds of no-power each time (I forget the exact spec). With the various UPS units in place around the house there was no interruption on sat. TV, house WIFI or the 3d printer that was running a job during both events. No knowledge of what caused the outages. The second event had the wife smiling about how nice it was not to have to worry about when power would be restored & quite happy we spent the money..
On a different generator note, I finished up setting up the Champion 7K dual fuel with quick connects for the propane feed. Leaving the provided hose w/regulator attached had me worried about breakage when moving the unit around & removal between uses had me concerned about the flare fittings eventually leaking from repeated install/removal. The only pain was getting/building adaptors between SAE flare connections (on the gen & extension lines) & NPT (what the quick connects use). The original line & generator got one set and the extension hose got the second one. I already have a two bottle manifold set up for extended/high consumption use if needed. I keep 7 20lb bottles in the shed for "just in case".