There’s not an exact way to do that, but you can set an “at any point” goal, though it will take all wattage into account. I have a similar scenario in my home where I want Sense to alert me if my aux heat turns on. It hasn’t yet been detected, so I set an “any point” usage goal for 10kw. It’s not perfect, but in most cases, if I’m pulling over 10kw, it’s because my aux heat is running; it’s very rare that I get a false positive.