Hi Robert,
your concern is right about no direct connection to the developers. But actually there is not needed that much. Although they also run forums and Facebook groups, but it was not needed to connect there. It was working out of the box.
I hope it will rund some years, then I can look for another solution. (Maybe a new emonSomething for 3-phase).
Until then, my aim was to gather data about energy usage for a possible tarif change in my country. That aim is already partly completed, next summer I will have a whole year of data.
But although there is no direct connection to the developers (and the firmware is not open source), I like their concept of allowing most functions also to work without their cloud. So if their cloud gets shut down, but the electronics still work, I am still able to get my data.
The 3EM is basically an ESP8266 with an energy meter IC. You don’t want it in OEM and I very much understand your concerns about certification. But it is a product “out of the box”, so at the moment the easiest solution for me.
Maybe the Iotawatt could also have it done.