Hello, I have a very strange problem in my apartment. Every day in the morning and the evening, my one and only RCD in my apartment trips exactly the same second as the public street/road lights turns on and off (evening, morning). My RCD, is Type A(C) with brand ”Sassin”, model 3SL36, 40A, 0.03A). I have had an electrician to check out but he cant find out where the problem resides or what a possible solution could be. Its 1-phase (zero and phase) incoming power to apartment. I also have 3 AC inverters (Fujitsu) Air-conditioners (2 of these serie-connected into one power source), all three AC inverters connected into 2 different fuse-groups which might affect something. After long investigation to narrow down the problem and devices, I have found out that when i disconnect the air conditioners only, and the street lights turns on/off, the RCD does NOT trip. So, I believe the power-peak from the street lights hitting my apartment in combo with my AC-inverters are the problem, but the big question is to solve it... Any help and advice here would be of great value!