In Florida all the inspectors I've dealt with (three or four of them) asked for battery calculations on commercial fire alarms.
One AHJ tried to tell my customer he needed a licensed alarm installer to put his DIY system in. I sent the customer a PDF of the Florida statute with the appropriate paragraphs highlighted. The customer showed that to the AHJ and got his permit.
Some have been asking for an inspection report and others have not. Clients sometimes ask me to do the battery calc's for them but I prefer to send them the spreadsheet and teach them how to use it instead.
We got a large video project recently and the local inspector only wanted to know if the equipment was UL listed. He didn't ask about power supplies, cabling or anything. The customer had apparently gotten a bid from an installer before he bought the system from my online CCTV store because he knew exactly what he wanted for the job -- cameras, lenses, DVR's, mounts and housings, etc. I'd like to meet the guy who bid the project and thank him for doing such a nice job. Hope to meet more of his customer. :^)