I already have a 4.48 kw system. 16 280w panels on garage roof. On a sunny day lately it will do 29kwh a day. My peak is like 11 to 2 by 5 it's all done but sun is out. I can check output every 5 minutes, love the micro inverters.
When I first ordered my kit the solar company screwed up,sent me 16 250w panels which they sold me at a great price so they would not have to pay for shipping back to CA.
The largest DIY unit I see does 6 panels dual axis, I would rather have one large array instead of 2 on my small parcel of land. I'm going to install 4 more on garage roof so that will leave me with 12.
I can do all the work like setting pole and installing panels just need the rotating assembly and mounting structure.