I did not, however my electric co-op had one of their engineers review my line drawing and build list as well as an in person inspection prior to connecting me to their grid.

I ran into this. Illinois has a renewable energy credit system. Unfortunately to qualify for it you have to have your system installed by a certified installer. Those installers wanted way more than I'd ever get back in renewable credits. I installed 8kw on my roof myself. Took me three six hour working days. A ton of time planning and learning but I like these projects so that was recreational really. I bought everything I needed on sale online and had it shipped right to my door. The whole system with permits, inspections, and materials cost me about $12k before the tax rebates. If I had paid some to install the same system installed it would've cost me $25k+.