I bought my small system, 1.8 kw. I did the installation myself, just studied the codes. The panels are ecoworthy from Amazon. It is grid tie. The system will run when I am on the back up generator.
In the summer the system will make almost 1.9 kw, right now about 1.2 is a good day. I have very open southern exposure over the lake. My purpose was the credit and slight reduction in utilities.