Activating or controlling components in the house or garden

Hardware
2

I use Sonoff S20s around the house to control external lighting, so only small currents involved.

I did buy some of these solid state relays from Banggood (says they can handle 80A) a few months ago - but haven't used them yet. I did couple one of them up to a Wemos D1 Mini and can verify that they do switch with 3v3 logic. No doubt some of the other forum members will offer suggestions for you.