I’ve bought a PlugWise Zigbee 3500w plug, just to be sure it could handle the peak-loads. It works fine.
PS @Rocodamelshekima thanks for the inspiration! I already had flows for this use case, but this one is much more versatile!
My “older” flows:
And:
Well… Just now I wanted to use the new flow for the first time, I can not read/connect the plug? Grrrzz…
Aaaand so I discovered the issues with Zigbee devices. Also using a Fibaro (Z-Wave) plug now. 
