Have the IMT Irradiance sensor connected ( Via RS485 - USB ) to Multi ( 433 ) / Venus ( v2.66 ) setup and all works beautifully when all running ESS. When grid is lost the Radiation sensor looses connection with Venus , then reconnects for 1-5 mins and then loose connection again - this then repeats continuously. Further if grid is present and I disconnect the RS485 link to my Et112 EM ( connected to PV inverter ) is also disconnects / reconnected all the time ! It still does this if I "remove the connected device " once I disconnect the ET112. Weird behavior - has anyone else seen this behavior before ?