Shelly 3EM

Setup took about twenty minutes but now I can see exactly what each phase is pulling on my phone, and the contactor control gives me peace of mind when the dryer kicks on. The data updates fast enough that I caught a faulty heater before it ran up the bill.

Setup was surprisingly painless for a three-phase meter, and the per-phase consumption data in the app makes it easy to spot which circuit is eating power. The contactor control feature is a nice bonus that’s already letting me automate my water heater.

Three-phase readings are spot-on — my electrician double-checked the numbers against his handheld meter and they matched to the decimal. The contactor control has been rock solid for switching my water heater on off-peak, and the app updates fast enough to watch live usage without lag.