Circuit-level kits show where the power goes. You get a sensor for each big breaker, usually 50 A or 60 A clamps, plus mains sensors for the total. Most cover up to 16 circuits. The cheapest 16-circuit kits now cost less than $200, and the main differences are whether data stays local, the maker’s accuracy claim and the warranty. Sensors fit around a single wire, so you will need a panel with room to work.
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Full ranking 8
- Meross EM16#1 of 8Full review
A Refoss-class local monitor under the Meross name, a little cheaper.
Amazon $189.99$189.9916Local + Home Assistant±1% - Refoss EM16P#2 of 8Full review
The pick for Home Assistant users who want circuit data without a cloud account.
Amazon $199.99$199.9916Local + Home Assistant±1% - Fusion Energy SEM-Meter (16 sensors)#3 of 8Full review
The lowest price for 16 circuits and local MQTT, if you accept a lesser-known maker.
Amazon $139.99$139.9916Local + Home Assistant±1% - Fusion Energy SEM-Meter (8 sensors)#4 of 8Full review
Choose the 16-sensor kit instead unless it is out of stock; the saving here is small.
Amazon $129.99$129.998 (expands to 16)Local + Home Assistant±1% - Emporia Vue 3 Commercial 3-Phase#5 of 8Full review
For a small shop or workshop on 3-phase power; a homeowner on split-phase should buy the standard Vue 3.
Amazon $209.99$209.9916-- - Siemens Inhab Energy Monitor#6 of 8Full review
For buyers who want a Siemens panel ecosystem; the data features cost more than the competition.
Amazon $267.75$267.7516-- - Emporia Vue 3 (16 sensors)#7 of 8Full review
The most common panel-wide monitor for a home with a typical 200A split-phase service. Pick it if you want per-circuit data and are fine with a cloud app.
Amazon $199.99$199.9916Cloud app±2% - Emporia Vue 3 (8 sensors)#8 of 8Full review
A cheaper start for the same Vue 3 brain, if you only care about the big appliances.
Amazon $149.99$149.998 (expands to 16)Cloud app±2%
