The way the industry is structured from my experience the electrician often 'may' oversee the project, but typically you engage with a 'turnkey' solar type company to do all of the following:front end financial analysisget through the regulatory process and most utilities require filing what's called an 'interconnection agreement'bring in an engineer like me to draft plans, as requiredthen once the interconnection has been approved, they shop the install to an electricianoften in house resources from that solar company are used to actually mount panels and do most of the LV wiring, and they will leave the 120/240 etc wiring to the electricianGranted, the above process unfortunately has a lot of 'soft costs' built in that drive up the cost of these types of projects for a homeowner, but they still do pencil out in some cases.  

This isn't a coincidence as that is the exact same time that the national debt began to spike upwards.  30Yr interest rates:  https://fred.stlouisfed.org/se...US Debt to GDP ratio:  https://fred.stlouisfed.org/se...The entire financial system is interconnected, stocks, bonds, interest rates, whatever. 

New construction required hardwired or wireless interconnected systems. 

Also check your local codes, they may require upgrades like interconnected smoke detectors and AFCI "Arc fault" breakers.

See below:I currently use the interconnected hardwired smoke and carbon monoxide alarms in my units with 10 year sealed batteries to satisfy the current, and hopefully future, requirements.

If I were to map our all of the interconnections between customers and referrals in my service business over the past 10 years, it would look like one of those chaotic tactical FBI crime web boards from the movies where the lines crisscross too much to even track. 

There is an interconnected group of players there, and I bet you and I  have come across the same names.

So, I will have 3 inter-connected cabins.

Put them up on your wall and interconnect them with strings to weave a timeline of deceit.

Many of these type of exams require a certain amount of fire alarms that are interconnected, window size for emergency egress, etc.