Check out "Shelly" devices, have recently bought a few to have a play with in connection with home automation, very reasonably priced and have a very good reputation for reliability.
The basic Shelly-1 relay has a 16 amp relay so in theory can support up to 3Kw. load control, however, think if I was controlling that type of load I would prefer using an external interposing relay/contactor as the units are so small.
All the range are fully Tasmoto FW "flashable", have tried this on one unit but decided that the latest native Shelly FW was better now being full MQTT compatable and re-flashed back to native FW.
The range also supports full integration with Home Assistant.
Excellent web site and forum, lots of information and support.
Currently configuring the Shell-EM power monitor on a RPi-3B-Plus broker with node-RED, Mosquitto, Influx and Grafana SW, houres of fun.
I placed my first Shelly order with Amazon (prime) and it took close to a week to deliver, appeared to come directly from the Bulgarian factory.
Second order placed via the Shelly UK shop, modest Royal Mail P&P charge, arrived next day, better option, appear to hold their own stock.