Yes, already got my P1 Meter and integrated it into HA without any problems!
Too bad they do not provide any downloadable template sensors, or sort of dashboard for hourly/daily/weekly/month;y/yearly statistics and cost.
That would really make them standout from all the others who sell these sensors for less…
I use the Homewizard P1 with HA and it has worked fine. But I would like to add a P1 that is located at a remote location without public IP. The P1 communicates just fine with the HW app cloud. It would be nice if you added functionality in the HA integration to connect to the cloud to get limited read access to the devices.