I came across this article on your site. I don’t know whether to laugh or cry. All of us who have solar power plants use a 3 phase system. This device is really unusable:
Do I really have to install 3 devices on each phase? It’s more worth buying a Tuya, it’s a small and simple device.
I hope you will make a three-phase metering device. It would be good to provide metering of the energy supplied and consumed. As a bonus, monitoring of the energy flow would be, if it were higher than the set value, it would alert you and it would be possible to set what to do.