Thank you Greenfields and other members for your advice. Our solar system was installed on a business premises during desperate times last year, by a local electrician that claimed to know all about solar installation! We are now learning about this system ourselves as we were certainly conned by his apparent knowledge. The guy also doesn’t take our calls now ! Is there a way to check if a CT coil was installed? We have unticked the boxes as you advised. We have 3 phase which is apparently split between the two inverters.