any links to the parts you use?Yes, I run 2x 250w in the Summer + 1 330W extra added in the Winter, it works just as you say it uses the grid tie power first.
Panels in the garden, plugged into the ring main in the shed.
Micro grid tie is more used for covering the background electricity usage, like fridge freezer ect.
Exactly what im hoping for just go some way to powering the stuff like router, switch, nas. House runs around 250w at idle.