Nine devices after one week? I’d say you were damned lucky, and the data from all the people who went before you loosened the lid of the catsup bottle for you.
FWIW, I’m still waiting on my hot water heater (MIA), dishwasher, dual-fuel range, washing machine, fridge/freezer, toaster (MIA), espresso machine (MIA), etc. etc. to show up after 20 weeks. MIA meaning it showed up and then disappeared again.
How reliably was it at detecting your water heater before it was lost? Mine is hit or miss, and often it only recognizes one line, although it was identified within a week or two. Mine is routed through a dual relay zwave controller, fwiw.
I should say that the monitor was hooked up for about an hour via mobile hotspot a few weeks prior to getting my wifi connection more reliably hooked up. So that could’ve given me some extra learning time.
The hot water heater was being detected and recorded very reliably. It was my single largest power using learned device. Then Sense changed the quality threshold for the model it depended on and the hot water heater disappeared. It’s load then conflated with another device that I reported, and then it disappeared as well. Now I have a new “hot water 4” but its usage doesn’t look much like the original hot water heater, not enough wattage and not on frequently enough.