This is a simple power monitor that I put together for monitoring my house. It includes an esphome configuration and an easyeda circuit & pcb layout.

I have 2 200 amp panels feeding my house that sit right next to each other. I also have an electrical outlet that sits right below the panels. This therefore supports 4 CT Clamps (one for each leg of each panel) and a single 9V AC/AC transformer for measuring voltage. I make the assumption that voltage is the same on all 4 legs.

Parts Used:

• CT Clamps: https://www.amazon.com/dp/B0B91R55TS (200A version)
• AC/AC transformer: https://www.amazon.com/gp/product/B01IR4A9GK