Maximum demand when installing PV

[Morgan keith]

Hey guys. Just wondering why it's necessary to calculate maximum demand of the installation when filling out electrical installation certificates when installing a PV system? Because your inverter isn't really an additional load on the supply because it's feeding power in?
Thanks

 

[bigbob1]

because it says you have to so you have to!! lol your signing off an ac circuit so you must put in the maximum demand for the main fuse, ie 100A main fuse maximum demand of say 60A, it's for the whole system not just your circuit. it's part of the supply characteristics.