Got it right second time around
Installation date 4th December last and the Shine App that you need to see what's going on. There were too many zeros on the app screen so I thought something was amiss. Contacted Growatt, very helpful and swiftly into action to help. However, did not quite identify problem initially. Finally they said you have to contact your supplier, who frankly was slower and appeared less techinically conversant with the system. All is now resolved with a new CT2 (don't ask!). App shows that things were happening in the background but not quite right. I now have to decide which of th Octopus tariffs is best for the whole system. HELP.