busy making a single wire electrical schematic of the house electrics

the whole setup will be checked by an independant auditor to certify the PV install so i can get my green certificates.
Now the thing is, the electrics of the house are a bit of a mess. wouldn't call it unsafe, but it's just not done logically and a pain to document.
Haven't done an electrical schematic since early high school, about 20 years ago.. It might be a bit crude the way i do it, but hey, i'm still busy renovating the house, he'll have to cut me some slack there.. the PV setup is done right, that's all he needs to worry about.
Maybe the 45 might help him see that there is no problem certifying my setup.