I’m looking to monitor my house’s entire electricity consumption using CTs (current transformers) installed in my breaker box. I have 200A split phase service, the most common kind of residential electrical service in the United States.
I tried using the Shelly EM system recommended by the Integrating your electricity grid page in the Home Assistant docs, however the biggest current transformers Shelly sells are physically and electrically too small for 200A service. It should be noted that all Shelly systems are incapable of monitoring 200A service. Their products are designed and marketed primarily in Europe, where because the residential service voltage is higher, the amps are smaller, and thus the cables coming from the utility are smaller, and thus they actually fit in the tiny CTs they sell. (Because they can’t be used to monitor whole house power in most homes in the United States, it may be worth updating the web site to point this out, to prevent people from accidentally buying it in the future, like me. Fortunately I’m still in the return window.)
So if not the Shelly, what else is out there that is Home Assistant compatible and doesn’t require bouncing data through the cloud first? To monitor standard US residential service - split phase 200A. I need 3 CTs, physically large enough to fit over 3/0 awg cables (L1, L2, N). Uses wifi or I can run an ethernet cable. Ideally it is a complete product and not something I have to piece together like an ESPHome based system, but if that is really the only way then I’ll do it.
Any recommendations are appreciated, thanks!