The OP was asking about Texas.
Our house was built in late 2014 and had a smart meter already installed.
When our solar panels and PowerWalls were installed, the grid company (Centerpoint) didn't have to make any changes to our meter, and were able to complete their inspection and provide Permission To Operate (PTO) relying only on our installers diagrams and pictures.
Since our house was built with 3 150A panels (2 for the house, 1 for 2 HPWCs), it's possible we already had an upgraded meter connection, so nothing else was needed to connect our new solar/PW system.