Buy the Tapo P110M two-pack, not the largest bundle. Two plugs are enough to measure one always-on load and automate one known waste pattern. The Meross MSS315 four-pack is the better alternative for a household already using Meross. If you only want to find waste and do not need remote control, buy one Kill A Watt meter instead.
| Pick | Why it wins | Check before buying |
|---|---|---|
| Tapo P110M two-pack | Energy history, schedules, Matter, compact body | 2.4 GHz Wi-Fi; load type and rating |
| Meross MSS315 four-pack | Energy monitoring plus Matter multi-admin | Energy detail lives in Meross app; verify exact model |
| Kill A Watt P4400 | No app or account; move it between devices | No remote control or history export |
Best overall: Tapo P110M two-pack
Check Tapo P110M two-pack prices . The P110M tracks current power and energy history, estimates cost from an entered tariff, supports schedules and auto-off, and is Matter certified. Its compact shape helps keep the second receptacle usable.
The U.S. version is rated for 100-125V and up to 15A/1,800W for general resistive use, with a 1/6-horsepower motor limit. Verify the actual appliance load rather than assuming a plug can control any device with a standard cord.
Use the first plug in monitor-only mode for a load that cycles or runs many hours. Use the second on a low-risk load with a clear schedule, such as selected lighting or an office accessory setup. After two weeks, compare the measured kWh with the previous routine. If the schedule did not materially change runtime, it did not create meaningful savings.
Best for existing Meross users: MSS315
Check Meross MSS315 four-pack prices . The current U.S. MSS315 includes an internal energy meter and Matter support. Meross provides live and historical energy information in its own app, while compatible Matter platforms handle basic control.
This is the better four-pack only when you can name four safe uses. Buying extra plugs first and inventing jobs later often leads to pointless automations or risky control of appliances that should remain powered.
Check the model number at checkout. Meross sells several similar plug families, and energy monitoring is not universal across older MSS110/MSS210 variants.
When one meter is smarter than a bundle
Check Kill A Watt P4400 listings if your goal is an audit rather than automation. Move the meter from a television setup to a dehumidifier, computer, aquarium, or other compatible appliance. Because there is no remote relay, an accidental app command cannot turn the load off.
This route costs less, creates no new account, and encourages measurement before control. Keep a simple note of elapsed time and kWh for each device.
Do not automate these by default
Avoid routine or remote shutoff for:
- medical and accessibility equipment;
- refrigerators and freezers;
- routers, alarm panels, cameras, and critical network equipment;
- sump pumps and leak-control equipment;
- computers, storage devices, or game consoles during updates;
- heaters, motors, pumps, and compressors unless the exact plug is rated and the use is appropriate;
- anything that can restart unsafely when power returns.
For a questionable appliance, use passive monitoring and leave control with the equipment.
Matter does not move every feature
Matter makes basic control more portable across ecosystems, but it does not guarantee that another platform will show the maker’s energy charts, tariff calculator, firmware controls, or every automation trigger. Expect to use the Tapo or Meross app for the richest energy view.
You may also need a Matter controller in the ecosystem you choose. Confirm platform requirements before buying a bundle for Apple Home, Alexa, Google Home, or SmartThings.
A better starter plan
- Choose two loads with long runtime or a known forgotten-on pattern.
- Confirm voltage, current, motor/resistive classification, and safe restart behavior.
- Monitor both for a week with no automation.
- Add one conservative schedule or auto-off rule.
- Compare energy over similar days.
- Keep the rule only if it saves energy without creating nuisance or risk.
Start With Two Plugs, Not Ten
The Tapo P110M two-pack is the best starter purchase because it provides enough data and control without encouraging gadget sprawl. Meross MSS315 is a good ecosystem alternative. Kill A Watt is the better choice when measurement, privacy, and simplicity matter more than automation.
Details were checked against the Tapo P110M page , TP-Link energy feature guide , Meross MSS315 U.S. page , and P3 Kill A Watt page .
See Also
If you want to pressure-test this shortlist, read Best Clamp Energy Monitor for Beginners: What to Buy First, Best Electricity Monitors for High-Draw Appliances, and How to Use Energy Data to Investigate HVAC Runtime next.
For more context beyond the main ranking, A Practical Home Energy Audit Checklist and Best Energy Monitors for Apartments and Renters add useful comparison detail.