Something in my house is sucking a *lot* of power and I would like to find it and make it stop doing that. Anyone have specific recommendations for multi-circuit power-usage-tracking devices? (I have 13 240V and 18 120V circuits across three panels, suggesting I will probably need three such devices; the most populated panel has 10 120V and 2 240V.)

Other requirements: ideally #homeassistant compatible, not internet based (currently have devices on zwave and non-internet-facing wifi, adding zigbee soon for unrelated reasons), works with normal US split phase power. Assume I am a reasonably competent electrician and am comfortable putting a current transformer around a wire.

#homeautomation