Here is a great trick to add a ground mount when the home is 3D. For ground mounts right now, we need to go through the 2D process, so you just place your finger on the ground area on your phone where you want the ground mount, hold it, and wait for it to say "Add home?" Say yes, and it will give you the option to do a 2D proposal. Be sure to put in clear notes and tell the design team how many kilowatt hours you need for the year.
Here is a short video: