I am having accuracy issues. I have added solar mongering by main MTU will be showing a -1800 watts but the enphas system will be showing -2100 watt production and the backup panel will be back feeding -1550 watts. I the added a spider to try and find the mistake load. It is not showing. I was thinking it was the main 200A CT was only reading one leg. So I got the 400A CT but thy will not fit plug in the MTU. Help.