Shelly 3EM
Shelly 3EM has integrated relay output which can be used for contactor control :
REMOTE CONTROL
Manage the contactor control of Shelly 3EM from the Shelly Cloud App, MQTT or Rest API
OVERPOWER PROTECTION
Automatic shutdown and notification when exceeding a consumption limit.
COST MANAGMENT
Automatic turn off when a predefined power usage is reached.
WEEKLY SCHEDULING
Auto turn on and off by hour or sunset/sunrise.