I would like to control my 3kW immersion heater from a computer program (home-assistant.io). Does anyone have any recommendations for good quality high load smart switches with open interfaces please?
Here’s a roundup of the ones I have found:
Sonoff POW R2. Cheap and cheerful, and it can be flashed with Tasmota. However, this Sonoff device has shocking poor safety reviews on Amazon!
Another contender is Optimum OP-BM, a WiFi immersion controller - which looks a lot more sturdy! It appears to be controlled via a Chinese cloud service Tuya, but at least it has an API for automation.
Timeguard sell a similar device. However it is apparently proprietary and uses a closed control system.
For completeness, another option: VIBIRIT 16A
And finally, the various Solar Immersion Diverters, iBoost+ or Solic or Eddi. All of which are very expensive and none of which have WiFi or an API, AFAICT.
Any experience from the emon community would be appreciated.