Just wanted to pass along a word of advice to those in IL who have had their system fully installed and are awaiting the interconnection approval from Commonwealth Edison. Apparently Comed does not always send a letter/email/notification to either the resident or the installer when the system has been fully approved. In my case, it was only because I specifically called the Comed interconnection department did I learn that they had actually already approved my system in full. Tesla was surprised by this news as they had not received notification. They checked the "portal" after I notified them that the system was approved and confirmed that the approval had been posted to the portal (more than a day previously). And, the entire Comed approval process took less than two days (much less than the several-week timeframe that Tesla told me to expect). So, bottom line, call Comed interconnect once Tesla tells you that it is in their lap, and find out your status yourself.