Meross Smart Thermostat Plug Socket Review
A Wi-Fi enabled plug-in thermostat designed to automate space heaters and cooling devices through temperature-based scheduling and remote app control.
Quick verdict
The Meross Smart Thermostat Plug is an excellent entry-level solution for controlling standalone electric radiators or oil-filled monitors. While it won't replace a whole-home system, its temperature probe accuracy makes it far more efficient than the basic mechanical dials found on most portable heaters.
PowerGuardian Rating
Who it's best for
- Electric oil-filled radiators
- Greenhouse or conservatory heaters
- Pet vivariums or incubation setups
Who should avoid it
- You are using a heavy-duty 3kW fan heater
- You have no home Wi-Fi available
- You already have a centralised smart home heating system
Overview
Key features
- External high-precision temperature probe
- Works with Alexa and Google Assistant
- 7-day programmable scheduling
- Heating and Cooling modes
- Remote app control via Meross app
- Compact UK 3-pin plug design
Real world performance
Energy saving potential
Installation
Running costs
Pros
- External probe prevents 'short-cycling' near the heat source
- No hub required — connects directly to Wi-Fi
- App allows for tracking temperature history
- Simple voice control for accessibility
Cons
- 10A limit (approx 2300W) is lower than the standard 13A UK socket capacity
- Requires 2.4GHz Wi-Fi band which can be tricky with some Mesh routers
- External probe wire can look a bit untidy on the wall
Alternatives
Inkbird C236T
Often favoured for aquariums and reptiles with a more rugged probe.
TP-Link Tapo Smart Plug
Requires a separate Tapo temperature sensor to trigger automation.
Frequently asked questions
Can I use this with a 3kW heater?
Caution is advised. This plug is typically rated for 10A (approx 2300W). Most 3kW heaters require a 13A rating, so check your heater's wattage before use.
Does it work if the Wi-Fi goes down?
Scheduled routines usually continue to run locally, but you will lose the ability to change settings or use voice control until the connection is restored.
Can it control a portable air conditioner?
Yes, it has a 'Cooling Mode' that triggers the plug when the temperature rises above your setpoint.
Where should I place the temperature probe?
For best energy efficiency, place it at waist height, away from direct draughts and at least a metre away from the heater itself.
Final verdict
4.2 / 5The Meross Smart Thermostat Plug is an excellent entry-level solution for controlling standalone electric radiators or oil-filled monitors. While it won't replace a whole-home system, its temperature probe accuracy makes it far more efficient than the basic mechanical dials found on most portable heaters.