I understand I was just lucky the day I tested the PA4010, or had bad luck the other day with the PA4010P, with disturbing devices active eventually. Or, vice versa, I should not rely on that first...

I got a PA4010 Kit and it works pretty good between my flat and my cellar. It also worked with a power outlet in the building's public area, i.e. across 2 power meters. I'm fine with a speed of...