Best Home Energy Monitor (2026)
You can’t reduce what you can’t see. Energy monitors fall into two classes: whole-house (panel-mounted, sees every circuit) and plug-in (one appliance at a time). Here are the best in each.
This page contains affiliate links. As an Amazon Associate we earn a small commission on qualifying purchases — at no cost to you. Recommendations are based on independent research; we never accept payment for placement. Why: Best whole-house — machine-learning identifies devices Whole-house, machine-learns which device is which. ~$300, identifies hidden loads automatically. Why: Best plug-in — the original Kill-A-Watt The original plug-in kWh meter. ~$25, measures any appliance's real draw. Why: Best multi-outlet (HS300 6-outlet strip) 6-outlet smart power strip with per-outlet energy monitoring. ~$70. Want to know the cost of a specific appliance? Try our state-by-state calculators. Selections are based on a combination of (1) third-party efficiency certifications (ENERGY STAR, AHRI, CEE), (2) verified-purchase review patterns on Amazon and manufacturer sites, and (3) practical fit for typical U.S. household installation. We disclose all affiliate relationships and never accept payment for placement. For full transparency on how we compute the cost numbers throughout this site, see our methodology.Sense Home Energy Monitor
P3 Kill-A-Watt Electricity Usage Monitor
TP-Link Kasa Smart Plug with Energy Monitoring (HS300)
The bottom line
How we pick