It does look good. I would recommend some wire ties on the harnesses and I would suggest labels on the wires.
One white wire appears to be terminated poorly. (yellow connector)
Re: High wattage appliances.
I have sailed boats with microwaves and toasters. I run the engine when I use these. (I do the same with an anchor windlass)
The electric kettle can be easily replaced by a good old fashioned one on the stove.
ISPA Yachtmaster Offshore Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203, 204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)