If you have not found anyone yet, I can suggest a few things for you to do. I am not a professional electrician, but I learned a lot from a 7-year
refit I was involved with, after our electrician died before the
project was finished.
You can look for the product you want installed, bearing in mind the issues that come with the newer
batteries. Nigel Calder is in some new videos on YouTube, for example. Since space is tight, you would want to look for something if possible that will fit in the space occupied by your
current charger. Then, at least you can get that part out of the way. My guess is that not all
marine electricians out there are "current" (pun intended) on the new technology.