I just got another couple of the TP-Link Kasa timer switches, new model KP105. They advertise 10A maximum load but the small leaflet in the box says maximum load for a heater is 1500W. Anyone know why that might be? I purchased them specifically for using with heaters.
I've had the older model HS100 / HS110 running a 2.1kw heater for a year with no issues. It only gets slightly warm. I don't know if that model has the same restriction.