In the last month I have had a lot of work done including new hot water tank, 3 solar panels, immersion and the water tank frame strengthened / repaired
This was all part of having the roof resealed after our water tank blew leading us to have the roof inspected. That revealed many issues from the original build 7 years ago so we got 3 quotes for the work as it was a reasonable project and double checked with my Turkish neighbour who has retired here himself with his family and so is not a Fethiye local
What I found out is exactly as Dutchie and Jazzy have described.
There are different types of system, different sizes of tank, varying amounts of insulation, different sizes and types of solar panel.
It was quite easy to check the prices by getting a description of the type of panel and tank then cold calling at some of the solar places around Fethiye.
Many shops wanted to come round, inspect and quote but I did get good gut feel estimates from them which reassured me of the full quotations
It cost me:
3 solar panels at 130 TL each including fitting, 5 litres of safe antifreeze 50TL, new water tank cross member, clean and paint 60 TL (organised and checked by Fatih at Fethiye Property Services)
Single large pressurised hot water tank with 10cm insulation, new immersion 700 TL including fitting (organised and checked by Byram)
I am no expert but do like to understand what work is involved so Fatih and Byram did explain other options to me and how the different systems work - very helpful guys