Looks like something thermostatically based (like it’s trying to keep a consistent temp), and it’s pretty small, so maybe a coffee maker? Also, are you in the snow belt? if so, it might be something like de-icing heat elements near your gutters.
That makes sense. I was thinking maybe a fridge at first, but the wattage is too low. We have a small countertop ice maker. There is also a dehumidifier in the crawl space that I have wondered about.
As for location, we live in the southeast. Snow and ice are a rarity here.
Thanks for the suggestions.