You can get a 16-circuit kit under $150, or a whole-home unit for under $100. Cheaper kits come from less-known makers, so compare warranty and local control before choosing on price.
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.
Best Home Energy Monitors Under $150: Circuit-level
- Fusion Energy SEM-Meter (16 sensors)#1 of 3Full 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)#2 of 3Full 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 (8 sensors)#3 of 3Full 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%
Best Home Energy Monitors Under $150: Whole-home
- Aeotec Home Energy Meter 8#1 of 7Full review
The Z-Wave choice for a whole-home meter that feeds your existing hub.
Amazon $95.99$95.99None in boxLocal + Home Assistant±1% - Aeotec Home Energy Meter Gen5#2 of 7Full review
The older Aeotec Z-Wave mains meter, for hubs without Z-Wave Long Range; most buyers should take the cheaper Home Energy Meter 8.
Amazon $115.99$115.99None in boxLocal + Home Assistant±1% - Shelly EM Gen3#3 of 7Full review
An inexpensive meter for a single circuit you care about, such as a sub-panel or heat pump.
Amazon $69.99$69.99None in box (up to 2)-- - Shelly 3EM-63W Gen3#4 of 7Full review
A budget three-phase meter for a small installation.
Amazon $114.99$114.99None in box (up to 3)-- - Emporia Vue 3 (no branch sensors)#5 of 7Full review
The cheapest way into Emporia: whole-home numbers now, circuit sensors as you need them.
Amazon $99.99$99.99None in box (up to 16)Cloud app±2% - Shelly Pro EM 50A#6 of 7Full review
Good for monitoring and switching a pair of big loads such as an EV charger and a water heater.
Amazon $119.99$119.99None in box (up to 2)-- - Eyedro Home#7 of 7Full review
A simple two-sensor monitor for the service mains, made in North America.
Amazon $149.89$149.89None in boxCloud app-
