Winner
Updated November 2026
Data from the official Shelly and SwitchBot sites.
2026 verdict
Fewer battery swaps and a longer warranty make the Shelly BLU TRV the better smart radiator valve of this Bluetooth pair.
It is the better reviewed of the two, runs a rated 2 years on two AA cells against 10 months, carries a 2 year warranty against 1 year, and reaches Wi-Fi through a Shelly BLU Gateway for Google Home, Alexa and SmartThings. The SwitchBot Smart Radiator Thermostat is the cheaper valve and the one with the wider reach: through a SwitchBot Hub it adds Apple Home and Matter, which the Shelly does not offer at all, and it brings frost protection and automatic scheduling the Shelly lacks. Both show the temperature on a built-in screen and can take the room reading from a separate sensor. Pick the Shelly BLU TRV for a set-and-forget valve in a Google, Alexa or SmartThings home, and the SwitchBot Smart Radiator Thermostat for Apple Home, Matter or a tighter budget.
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The biggest differences
Where these two are furthest apart, and by how much.
- Battery Life2.4×Shelly BLU TRV2 years vs 10 months
- Warranty2×Shelly BLU TRV2 years vs 1 year
| Feature | Shelly BLU TRV | SwitchBot Smart Radiator Thermostat | Winner |
|---|---|---|---|
| Price | $64.99 | £25.64 | SwitchBot Smart Radiator Thermostat |
| Rating | 4.1 | 4.0 | Shelly BLU TRV |
| Warranty | 2 years | 1 year | Shelly BLU TRV |
| Battery Life | 2 years | 10 months | Shelly BLU TRV |
| Connectivity | 2.4 GHz WiFi, Bluetooth | Bluetooth | Shelly BLU TRV |
| Integrations | Google Home, Alexa, Samsung SmartThings, Home Assistant | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | SwitchBot Smart Radiator Thermostat |
| Frost Protection | NO | YES | SwitchBot Smart Radiator Thermostat |
| Screen | YES | YES | Tie |
| Sensors | Temperature | Temperature | Tie |
| Local Control | YES | YES | Tie |
What the differences mean
Battery life
The Shelly BLU TRV is rated for 2 years on its two AA cells, the SwitchBot Smart Radiator Thermostat for 10 months on the same pair. In practice that is a battery change every other winter against one every heating season, multiplied by every radiator in the house.
The extra box each one needs
Both valves talk Bluetooth only at the radiator. The Shelly BLU TRV needs a Shelly BLU Gateway kept powered for Wi-Fi, remote control and voice assistants; the SwitchBot Smart Radiator Thermostat needs a SwitchBot Hub for Google Home, Alexa, Apple Home, SmartThings and Matter. Budget for one either way unless you only use the phone app nearby or Home Assistant.
Apple Home and Matter
This is the split that settles it for some homes. The SwitchBot Smart Radiator Thermostat reaches Apple Home and Matter through its hub, which acts as a Matter bridge. The Shelly BLU TRV supports neither, so an Apple Home household should not start with it.
Frost protection and scheduling
The SwitchBot Smart Radiator Thermostat has frost protection, which keeps a room left empty in winter from dropping low enough to risk the pipes, and it supports automatic scheduling on top of manual schedules. The Shelly BLU TRV has neither, so its schedules are the ones you set by hand.
Warranty
The Shelly BLU TRV comes with 2 years of warranty and the SwitchBot Smart Radiator Thermostat with 1 year, which matters on a device that sits on a hot radiator all winter.
Which one to buy if
- you want to change batteries as rarely as possible
The Shelly BLU TRV is rated for 2 years per set of AA cells, against 10 months for the SwitchBot.
- your home runs on Apple Home or Matter
The SwitchBot Smart Radiator Thermostat reaches both through a SwitchBot Hub; the Shelly BLU TRV supports neither.
- you already have a Shelly BLU Gateway
The gateway the Shelly BLU TRV depends on is already powered and placed, so the valve joins Google Home, Alexa and SmartThings with nothing more to buy.
- some rooms stay unheated through the winter
The SwitchBot Smart Radiator Thermostat has frost protection built in, which the Shelly BLU TRV does not.
- you are fitting out many radiators on a tight budget
The SwitchBot Smart Radiator Thermostat is the cheaper valve of the two, and the gap grows with every room.
Winner
$64.99
- + Rating: 4.1
- + Warranty: 2 years
- + Battery Life: 2 years
- - Price: $64.99 vs £25.64
- - Integrations: Google Home, Alexa, Samsung SmartThings, Home Assistant vs Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
36% OFF
£25.64
£39.99
- + Price: £25.64
- + Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- + Frost Protection: YES
- - Rating: 4.0 vs 4.1
- - Warranty: 1 year vs 2 years
What owners say
Owners of both valves agree on installation: the Shelly BLU TRV and the SwitchBot Smart Radiator Thermostat both go on in minutes with the adapters in the box. Beyond that they notice different things. Shelly BLU TRV owners single out quiet, accurate regulation and a gateway link they find steadier than the Zigbee valves they replaced, while their complaints are about Alexa responding inconsistently, Bluetooth range that depends on where the gateway sits and a built-in reading warmed by the radiator unless an external sensor is added. SwitchBot Smart Radiator Thermostat owners praise the sizing template, the clear app schedules and how well it behaves in Home Assistant over a Bluetooth proxy, and their warnings are schedules that did not stick, a valve overshooting the target, a fiddly display rotation and a top knob that detaches too easily.
Frequently Asked Questions
Which is better overall: Shelly BLU TRV or SwitchBot Smart Radiator Thermostat?
The Shelly BLU TRV, for its better reviews, a rated 2 year battery life against 10 months and a 2 year warranty against 1 year. The SwitchBot Smart Radiator Thermostat is cheaper, adds frost protection and automatic scheduling, and is the one that reaches Apple Home and Matter.
What is the biggest difference between the Shelly BLU TRV and the SwitchBot Smart Radiator Thermostat?
Which ecosystems they reach. The Shelly BLU TRV works with Google Home, Alexa and SmartThings through a Shelly BLU Gateway, and with Home Assistant, but not with Apple Home or Matter. The SwitchBot Smart Radiator Thermostat reaches all of those, Apple Home and Matter included, through a SwitchBot Hub, and Home Assistant directly over Bluetooth.
Do the Shelly BLU TRV and the SwitchBot Smart Radiator Thermostat need a hub?
For anything beyond the phone app, yes. The Shelly BLU TRV needs a Shelly BLU Gateway powered at all times for Wi-Fi and voice control, and the SwitchBot Smart Radiator Thermostat needs a SwitchBot Hub for Google Home, Alexa, Apple Home, SmartThings and Matter.
Which lasts longer on batteries, the Shelly BLU TRV or the SwitchBot Smart Radiator Thermostat?
The Shelly BLU TRV, rated for 2 years on two AA cells. The SwitchBot Smart Radiator Thermostat is rated for 10 months on the same two AA cells, roughly one heating season.
Do the Shelly BLU TRV and the SwitchBot Smart Radiator Thermostat have a child lock?
The Shelly BLU TRV has no child lock and no geofencing. SwitchBot does not document either feature for the SwitchBot Smart Radiator Thermostat, so check with SwitchBot if a child lock matters to you.
Who should buy the Shelly BLU TRV?
Buyers in a Google Home, Alexa or SmartThings home who want the longest time between battery changes and a 2 year warranty, and especially anyone who already runs a Shelly BLU Gateway.
Who should buy the SwitchBot Smart Radiator Thermostat?
Apple Home and Matter households, buyers who want frost protection for rooms left unheated, and anyone fitting out many radiators who wants the cheaper valve.
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