This will be interesting.
For some time now I have been pondering the fate of my works when I am gone, either moving or plain old dead with a heart condition. (they tell me).
I have endeavoured to write/construct basic manuals for my 3 boys, 10, 13 & 17 year olds. They show interest and support... but...
Also concerns about Electrical regs, and would a so called qualified sparky, brought in by the new owner, condem stuff if he thinks its not up to the latest memorised Country specs, or he just doesn't plain understand.
In that instance I have religiously stuck to the French Norms, and kept stuff very simple with notices adhered to things in the correct place.
I think SparWeb, its talking to your potential buyer, and seeing what they want, here in Europe even the standard PV panels GTI installations are a awkward situation, and what I gather have no extra cost benefit to the seller.
The lawyers will probably make a bit more on your House Sale.?
Good luck, and I will watch this with interest.